diff --git a/.travis.yml b/.travis.yml
index f380c1b9..10af790e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ notifications:
     on_failure: change
 before_script:
   - cp config/database.yml.example config/database.yml
+  - cp config/secrets.yml.example config/secrets.yml
   - RAILS_ENV=test bundle exec rake db:migrate --trace
 script:
   - 'bundle exec rubocop -Dc .rubocop.yml'
diff --git a/Gemfile b/Gemfile
index 837d5f23..5a1cae6e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -184,6 +184,9 @@ gem 'faker'
 # for seeds
 gem 'factory_girl_rails'
 
+# for integrating Stripe payment gateway
+gem 'stripe'
+
 # Use guard and spring for testing in development
 group :development do
   # to launch specs when files are modified
@@ -222,6 +225,8 @@ group :test do
   gem 'timecop'
   # for mocking external requests
   gem 'webmock'
+  # for mocking Stripe responses in tests
+  gem 'stripe-ruby-mock'
 end
 
 group :development, :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index b9d8b87a..98196af8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -141,6 +141,7 @@ GEM
       safe_yaml (~> 1.0.0)
     currencies (0.4.2)
     daemons (1.1.9)
+    dante (0.2.0)
     database_cleaner (1.3.0)
     debug_inspector (0.0.2)
     debugger-linecache (1.2.0)
@@ -481,6 +482,12 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     sqlite3 (1.3.9)
+    stripe (1.43.0)
+      rest-client (~> 1.4)
+    stripe-ruby-mock (2.3.0)
+      dante (>= 0.2.0)
+      multi_json (>= 1.0.0)
+      stripe (>= 1.31.0, <= 1.43)
     term-ansicolor (1.3.2)
       tins (~> 1.0)
     thor (0.19.1)
@@ -615,6 +622,8 @@ DEPENDENCIES
   shoulda-matchers
   spring-commands-rspec
   sqlite3
+  stripe
+  stripe-ruby-mock
   timecop
   transitions
   turbolinks
diff --git a/app/assets/stylesheets/application.css b/app/assets/stylesheets/application.css
index d0447354..ac01136f 100644
--- a/app/assets/stylesheets/application.css
+++ b/app/assets/stylesheets/application.css
@@ -14,4 +14,5 @@
  *= require bootstrap-datetimepicker
  *= require leaflet
  *= require bootstrap3-switch
+ *= require osem-payments
 */
diff --git a/app/assets/stylesheets/osem-payments.css.scss b/app/assets/stylesheets/osem-payments.css.scss
new file mode 100644
index 00000000..cfa451b4
--- /dev/null
+++ b/app/assets/stylesheets/osem-payments.css.scss
@@ -0,0 +1,3 @@
+.stripe-button-el {
+  float: right;
+}
diff --git a/app/controllers/conference_registrations_controller.rb b/app/controllers/conference_registrations_controller.rb
index 95e5c447..176f7937 100644
--- a/app/controllers/conference_registrations_controller.rb
+++ b/app/controllers/conference_registrations_controller.rb
@@ -28,8 +28,10 @@ class ConferenceRegistrationsController < ApplicationController
   end
 
   def show
-    @total_price = Ticket.total_price(@conference, current_user)
-    @tickets = current_user.ticket_purchases.where(conference_id: @conference.id)
+    @total_price = Ticket.total_price(@conference, current_user, paid: true)
+    @tickets = current_user.ticket_purchases.by_conference(@conference).paid
+    @ticket_payments = @tickets.group_by(&:ticket_id)
+    @total_quantity = @tickets.group(:ticket_id).sum(:quantity)
   end
 
   def edit; end
diff --git a/app/controllers/payments_controller.rb b/app/controllers/payments_controller.rb
new file mode 100644
index 00000000..db42a201
--- /dev/null
+++ b/app/controllers/payments_controller.rb
@@ -0,0 +1,43 @@
+class PaymentsController < ApplicationController
+  before_action :authenticate_user!
+  load_and_authorize_resource
+  load_resource :conference, find_by: :short_title
+  authorize_resource :conference_registrations, class: Registration
+
+  def index
+    @payments = current_user.payments
+  end
+
+  def new
+    @total_amount_to_pay = Ticket.total_price(@conference, current_user, paid: false)
+    @unpaid_ticket_purchases = current_user.ticket_purchases.unpaid.by_conference(@conference)
+  end
+
+  def create
+    @payment = Payment.new payment_params
+
+    if @payment.purchase && @payment.save
+      update_purchased_ticket_purchases
+      redirect_to conference_conference_registration_path(@conference.short_title),
+                  notice: 'Thanks! Your ticket is booked successfully.'
+    else
+      @total_amount_to_pay = Ticket.total_price(@conference, current_user, paid: false)
+      @unpaid_ticket_purchases = current_user.ticket_purchases.unpaid.by_conference(@conference)
+      flash[:error] = @payment.errors.full_messages.to_sentence + ' Please try again with correct credentials.'
+      render :new
+    end
+  end
+
+  private
+
+  def payment_params
+    params.permit(:stripe_customer_email, :stripe_customer_token)
+          .merge(stripe_customer_email: params[:stripeEmail],
+                 stripe_customer_token: params[:stripeToken],
+                 user: current_user, conference: @conference)
+  end
+
+  def update_purchased_ticket_purchases
+    current_user.ticket_purchases.by_conference(@conference).unpaid.update_all(paid: true, payment_id: @payment.id)
+  end
+end
diff --git a/app/controllers/ticket_purchases_controller.rb b/app/controllers/ticket_purchases_controller.rb
index 30d24d82..a8749eed 100644
--- a/app/controllers/ticket_purchases_controller.rb
+++ b/app/controllers/ticket_purchases_controller.rb
@@ -4,13 +4,15 @@ class TicketPurchasesController < ApplicationController
   authorize_resource :conference_registrations, class: Registration
 
   def create
+    current_user.ticket_purchases.by_conference(@conference).unpaid.destroy_all
     message = TicketPurchase.purchase(@conference, current_user, params[:tickets][0])
     if message.blank?
-      if current_user.ticket_purchases.any?
-        redirect_to conference_conference_registration_path(@conference.short_title),
-                    notice: "Thank you for supporting #{@conference.title} by purchasing a ticket."
+      if current_user.ticket_purchases.by_conference(@conference).unpaid.any?
+        redirect_to new_conference_payment_path,
+                    notice: 'Please pay here to get tickets.'
       else
-        redirect_to conference_conference_registration_path(@conference.short_title)
+        redirect_to conference_tickets_path(@conference.short_title),
+                    error: 'Please get at least one ticket to continue.'
       end
     else
       redirect_to conference_conference_registration_path(@conference.short_title),
@@ -18,18 +20,6 @@ class TicketPurchasesController < ApplicationController
     end
   end
 
-  def destroy
-    @ticket_purchases = current_user.ticket_purchases.find(params[:id])
-    if @ticket_purchases.destroy
-      redirect_to conference_conference_registration_path(@conference.short_title),
-                  notice: 'Ticket successfully deleted.'
-    else
-      redirect_to conference_conference_registration_path(@conference.short_title),
-                  error: 'An error prohibited deleting your purchase! '\
-                        "#{@ticket_purchases.errors.full_messages.join('. ')}."
-    end
-  end
-
   private
 
   def ticket_purchase_params
diff --git a/app/models/ability.rb b/app/models/ability.rb
index c2cbfa8e..760f43fe 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -81,6 +81,7 @@ class Ability
 
     can :index, Ticket
     can :manage, TicketPurchase, user_id: user.id
+    can [:new, :create], Payment, user_id: user.id
 
     can [:create, :destroy], Subscription, user_id: user.id
 
diff --git a/app/models/conference.rb b/app/models/conference.rb
index 55cd8ed5..8bf16a09 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -20,6 +20,7 @@ class Conference < ActiveRecord::Base
   has_one :program, dependent: :destroy
   has_one :venue, dependent: :destroy
   has_many :ticket_purchases, dependent: :destroy
+  has_many :payments, dependent: :destroy
   has_many :supporters, through: :ticket_purchases, source: :user
   has_many :tickets, dependent: :destroy
 
diff --git a/app/models/payment.rb b/app/models/payment.rb
new file mode 100644
index 00000000..e9386a35
--- /dev/null
+++ b/app/models/payment.rb
@@ -0,0 +1,41 @@
+class Payment < ActiveRecord::Base
+  has_many :ticket_purchases
+  belongs_to :user
+  belongs_to :conference
+
+  attr_accessor :stripe_customer_email
+  attr_accessor :stripe_customer_token
+
+  validates :status, presence: true
+  validates :user_id, presence: true
+  validates :conference_id, presence: true
+
+  enum status: {
+    unpaid: 0,
+    success: 1,
+    failure: 2
+  }
+
+  def amount_to_pay
+    Ticket.total_price(conference, user, paid: false).cents
+  end
+
+  def purchase
+    gateway_response = Stripe::Charge.create source: stripe_customer_token,
+                                             receipt_email: stripe_customer_email,
+                                             description: "ticket purchases(#{user.username})",
+                                             amount: amount_to_pay,
+                                             currency: conference.tickets.first.price_currency
+
+    self.amount = gateway_response[:amount]
+    self.last4 = gateway_response[:source][:last4]
+    self.authorization_code = gateway_response[:id]
+    self.status = 'success'
+    true
+
+  rescue Stripe::StripeError => error
+    errors.add(:base, error.message)
+    self.status = 'failure'
+    false
+  end
+end
diff --git a/app/models/ticket.rb b/app/models/ticket.rb
index 8a620f79..ec9c3436 100644
--- a/app/models/ticket.rb
+++ b/app/models/ticket.rb
@@ -20,24 +20,27 @@ class Ticket < ActiveRecord::Base
   end
 
   def paid?(user)
-    ticket_purchases.find_by(user: user, paid: true).present?
+    ticket_purchases.paid.by_user(user).present?
   end
 
-  def quantity_bought_by(user)
-    result = ticket_purchases.where(user_id: user.id).first
-    result ? result.quantity : 0
+  def quantity_bought_by(user, paid: false)
+    ticket_purchases.by_user(user).where(paid: paid).sum(:quantity)
   end
 
-  def total_price(user)
-    quantity_bought_by(user) * price
+  def unpaid?(user)
+    ticket_purchases.unpaid.by_user(user).present?
   end
 
-  def self.total_price(conference, user)
+  def total_price(user, paid: false)
+    quantity_bought_by(user, paid: paid) * price
+  end
+
+  def self.total_price(conference, user, paid: false)
     tickets = Ticket.where(conference_id: conference.id)
     result = nil
     begin
       tickets.each do |ticket|
-        price = ticket.total_price(user)
+        price = ticket.total_price(user, paid: paid)
         if result
           result +=  price unless price.zero?
         else
diff --git a/app/models/ticket_purchase.rb b/app/models/ticket_purchase.rb
index 8b0cd555..b7a8951f 100644
--- a/app/models/ticket_purchase.rb
+++ b/app/models/ticket_purchase.rb
@@ -7,23 +7,24 @@ class TicketPurchase < ActiveRecord::Base
 
   validates_numericality_of :quantity, greater_than: 0
 
-  validates_uniqueness_of :user_id,
-                          scope: :ticket_id,
-                          message: 'already bought this ticket!'
-
   delegate :title, to: :ticket
   delegate :description, to: :ticket
   delegate :price, to: :ticket
   delegate :price_cents, to: :ticket
   delegate :price_currency, to: :ticket
 
+  scope :paid, -> { where(paid: true) }
+  scope :unpaid, -> { where(paid: false) }
+  scope :by_conference, -> (conference) { where(conference_id: conference.id) }
+  scope :by_user, -> (user) { where(user_id: user.id) }
+
   def self.purchase(conference, user, purchases)
     errors = []
     ActiveRecord::Base.transaction do
       conference.tickets.each do |ticket|
         quantity = purchases[ticket.id.to_s].to_i
         # if the user bought the ticket, just update the quantity
-        if ticket.bought?(user)
+        if ticket.bought?(user) && ticket.unpaid?(user)
           purchase = update_quantity(conference, quantity, ticket, user)
         else
           purchase = purchase_ticket(conference, quantity, ticket, user)
@@ -48,7 +49,8 @@ class TicketPurchase < ActiveRecord::Base
   def self.update_quantity(conference, quantity, ticket, user)
     purchase = TicketPurchase.where(ticket_id: ticket.id,
                                     conference_id: conference.id,
-                                    user_id: user.id).first
+                                    user_id: user.id,
+                                    paid: false).first
 
     purchase.quantity = quantity if quantity > 0
     purchase
diff --git a/app/models/user.rb b/app/models/user.rb
index 1e86473d..29640ab3 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -44,6 +44,7 @@ class User < ActiveRecord::Base
   has_many :registrations, dependent: :destroy
   has_many :events_registrations, through: :registrations
   has_many :ticket_purchases, dependent: :destroy
+  has_many :payments, dependent: :destroy
   has_many :tickets, through: :ticket_purchases, source: :ticket
   has_many :votes, dependent: :destroy
   has_many :voted_events, through: :votes, source: :events
diff --git a/app/views/admin/tickets/index.html.haml b/app/views/admin/tickets/index.html.haml
index 2a2bac6d..486da0ef 100644
--- a/app/views/admin/tickets/index.html.haml
+++ b/app/views/admin/tickets/index.html.haml
@@ -3,7 +3,7 @@
     .page-header
       %h1 Tickets
       %p.text-muted
-        Tickets to purchase during registration
+        Tickets to get during registration
 - if @conference.tickets.any?
   .row
     .col-md-12
diff --git a/app/views/conference/_tickets.html.haml b/app/views/conference/_tickets.html.haml
index 41108b78..8a202295 100644
--- a/app/views/conference/_tickets.html.haml
+++ b/app/views/conference/_tickets.html.haml
@@ -5,7 +5,7 @@
         Support
         =@conference.short_title
         %p.lead
-          To support our event you can purchase these tickets
+          To support our event you can get these tickets
   - @conference.tickets.each_slice(4) do |slice|
     .row.row-centered
       - slice.each do |ticket|
@@ -20,6 +20,6 @@
                 = markdown(ticket.description)
               %p.text-center
                 = link_to(conference_tickets_path(@conference.short_title), class: 'btn btn-success') do
-                  Buy Ticket
+                  Get Ticket
                   = humanized_money_with_symbol ticket.price
 
diff --git a/app/views/conference_registrations/show.html.haml b/app/views/conference_registrations/show.html.haml
index 30cb281b..591d0777 100644
--- a/app/views/conference_registrations/show.html.haml
+++ b/app/views/conference_registrations/show.html.haml
@@ -85,33 +85,31 @@
   - if @conference.tickets.any?
     .row
       .col-md-12
-        %h4
-          %span.fa-stack
-            %i.fa.fa-square-o.fa-stack-2x
-            %i.fa.fa-ticket.fa-stack-1x
-          Tickets
-          -if @tickets.any?
-            = "(#{@total_price} #{@tickets.first.price.symbol})"
+        -if @tickets.any?
+          %h4
+            %span.fa-stack
+              %i.fa.fa-square-o.fa-stack-2x
+              %i.fa.fa-ticket.fa-stack-1x
+            Ticket Purchases
+            = "(#{@tickets.first.price.symbol}#{humanized_money @total_price})"
         %ul
-          - @tickets.each do |ticket|
-            %li
-              = ticket.quantity
-              = ticket.title
-              = word_pluralize(ticket.quantity, 'Ticket')
-              for
-              = humanized_money ticket.price
-              = ticket.price.symbol
-              = link_to conference_ticket_purchase_path(@conference.short_title, ticket.id), method: :delete,
-                                                                                            id: "ticket-#{ticket.id}-delete",
-                                                                                            class: 'btn btn-danger btn-xs',
-                                                                                            data: { confirm: "Do you really want to delete the #{ticket.title} ticket for #{@conference.title}?" } do
-                %i.fa.fa-trash-o
-          %li
-            - if @tickets.any?
-              = link_to 'Buy more tickets', conference_tickets_path(@conference.short_title)
-            - else
-              You haven't bought any tickets.
-              = link_to 'Please buy some tickets to support us!', conference_tickets_path(@conference.short_title)
+          .col-md-12
+            - @ticket_payments.each_pair do |ticket_id, tickets|
+              %li
+                = @total_quantity[ticket_id]
+                = tickets.first.title
+                = word_pluralize(@total_quantity[ticket_id], 'Ticket')
+                for
+                = tickets.first.price.symbol
+                = humanized_money tickets.first.price
+            %br
+        - if @tickets.any?
+          = link_to 'Get more tickets', conference_tickets_path(@conference.short_title), class: "btn btn-default"
+        - else
+          You haven't bought any tickets.
+          = link_to 'Please get some tickets to support us!', conference_tickets_path(@conference.short_title)
+          %p
+            (Your participation won't be valid without getting a ticket)
 
   .row
     .col-md-12
diff --git a/app/views/payments/_payment.html.haml b/app/views/payments/_payment.html.haml
new file mode 100644
index 00000000..56af80f7
--- /dev/null
+++ b/app/views/payments/_payment.html.haml
@@ -0,0 +1,27 @@
+.div
+  .col-md-12.table-responsive
+    %table.table.table-hover
+      %thead
+        %tr
+          %th Ticket
+          %th Quantity
+          %th Price
+          %th Total
+      %tbody
+      - @unpaid_ticket_purchases.each do |ticket|
+        %tr
+          %td
+            = ticket.title
+          %td
+            = ticket.quantity
+          %td
+            = humanized_money_with_symbol ticket.price
+          %td
+            = humanized_money_with_symbol ticket.quantity * ticket.price
+
+= form_tag conference_payments_path do
+  %script.stripe-button{ src: "https://checkout.stripe.com/checkout.js",
+        data: { amount: @total_amount_to_pay.cents, label: "Pay #{humanized_money_with_symbol @total_amount_to_pay}",
+          email: current_user.email, currency: @total_amount_to_pay.currency, name: ENV['OSEM_NAME'] || 'OSEM',
+          description: "book your tickets", key: Rails.application.secrets.stripe_publishable_key, locale: "auto"}}
+  = link_to 'Edit Purchase', conference_tickets_path(@conference.short_title), class: 'btn btn-default'
diff --git a/app/views/payments/new.html.haml b/app/views/payments/new.html.haml
new file mode 100644
index 00000000..0401f785
--- /dev/null
+++ b/app/views/payments/new.html.haml
@@ -0,0 +1,14 @@
+.container
+  .row
+    .col-xs-6.col-xs-offset-3
+      %h1
+        Payment Summary : 
+        = humanized_money_with_symbol @total_amount_to_pay
+    .col-xs-8.col-xs-offset-2.well
+      = render partial: 'payment'
+  .row
+    .col-md-13
+      %p.text-muted.text-center
+        %small
+          All payments are handled securely by our payment processor,
+          = link_to 'Stripe', 'https://stripe.com', target: '_blank'
diff --git a/app/views/tickets/_ticket.html.haml b/app/views/tickets/_ticket.html.haml
index 1a93f46b..e3985773 100644
--- a/app/views/tickets/_ticket.html.haml
+++ b/app/views/tickets/_ticket.html.haml
@@ -8,12 +8,8 @@
         - unless ticket.description.blank?
           = markdown(ticket.description)
   %td.col-sm-1.col-md-1
-    - if ticket.bought?(current_user)
-      = text_field_tag("tickets[][#{ticket.id}]", ticket.quantity_bought_by(current_user),
+    = text_field_tag("tickets[][#{ticket.id}]", 0,
       type: 'number', min: 0, class: "form-control quantity", 'data-id' => ticket.id)
-    - else
-      = text_field_tag("tickets[][#{ticket.id}]", 0, type: 'number', min: 0,
-      class: "form-control quantity", 'data-id' => ticket.id)
   %td.col-sm-1.col-md-1.text-center
     = ticket.price.symbol
     %span{id: "price_#{ticket.id}"}
diff --git a/app/views/tickets/index.html.haml b/app/views/tickets/index.html.haml
index fbc2df7c..894a4178 100644
--- a/app/views/tickets/index.html.haml
+++ b/app/views/tickets/index.html.haml
@@ -5,10 +5,10 @@
         %h1
           Tickets
       %p.lead
-        If you like, support
+        Please choose your tickets for 
         %strong
           = @conference.title
-        by buying a ticket*
+        here*
       =form_tag(conference_ticket_purchases_path, method: :post) do |f|
         %table.table.table-hover
           %thead
@@ -35,12 +35,11 @@
         .pull-right
           .btn-group-vertical
             = button_tag(type: 'submit', class: 'btn btn-success btn-lg') do
-              Support
+              Continue
               %i.fa.fa-shopping-cart
-            = link_to 'Continue without a Ticket!', conference_conference_registration_path(@conference.short_title),
-            class: 'btn btn-danger btn-sm'
+            = link_to 'Cancel registration', conference_conference_registration_path(@conference.short_title), method: :delete, class: 'btn btn-danger btn-sm'
   .row
     .col-md-13
       %p.text-muted.text-center
         %small
-          * Buying a ticket is not mandatory. Checkout will be at the conference registration.
+          * Getting a ticket is mandatory. Your participation will not be valid until you get a ticket.
diff --git a/config/initializers/stripe.rb b/config/initializers/stripe.rb
new file mode 100644
index 00000000..555cc16f
--- /dev/null
+++ b/config/initializers/stripe.rb
@@ -0,0 +1 @@
+Stripe.api_key = Rails.application.secrets.stripe_secret_key
diff --git a/config/routes.rb b/config/routes.rb
index 9a653b27..fac0b4f4 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -121,6 +121,7 @@ Osem::Application.routes.draw do
     resource :conference_registration, path: 'register'
     resources :tickets, only: [:index]
     resources :ticket_purchases, only: [:create, :destroy]
+    resources :payments, only: [:index, :new, :create]
     resource :subscriptions, only: [:create, :destroy]
     resource :schedule, only: [:show] do
       member do
diff --git a/config/secrets.yml.example b/config/secrets.yml.example
index 308bc858..a8d67504 100644
--- a/config/secrets.yml.example
+++ b/config/secrets.yml.example
@@ -13,10 +13,20 @@ development:
   suse_key: 'sample'
   suse_secret: 'sample'
 
+  # Register on stripe and add TEST keys here
+  # https://dashboard.stripe.com/account/apikeys
+  stripe_publishable_key: <%= ENV['STRIPE_PUBLISHABLE_KEY'] %>
+  stripe_secret_key: <%= ENV['STRIPE_SECRET_KEY'] %>
+
 test:
   # Generate your own with rake secret
   # secret_key_base: '12345'
 
+  # Register on stripe and add TEST keys here
+  # https://dashboard.stripe.com/account/apikeys
+  stripe_publishable_key: <%= ENV['STRIPE_PUBLISHABLE_KEY'] %>
+  stripe_secret_key: <%= ENV['STRIPE_SECRET_KEY'] %>
+
 production:
   # Generate your own with rake secret or use the environment
   # secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
@@ -56,3 +66,8 @@ production:
   # https://github.com/settings/applications
   github_key: ''
   github_secret: ''
+
+  # Register on stripe and add LIVE keys here
+  # https://dashboard.stripe.com/account/apikeys
+  stripe_publishable_key: <%= ENV['STRIPE_PUBLISHABLE_KEY'] %>
+  stripe_secret_key: <%= ENV['STRIPE_SECRET_KEY'] %>
diff --git a/db/migrate/20160606040848_create_payments.rb b/db/migrate/20160606040848_create_payments.rb
new file mode 100644
index 00000000..6792ad02
--- /dev/null
+++ b/db/migrate/20160606040848_create_payments.rb
@@ -0,0 +1,14 @@
+class CreatePayments < ActiveRecord::Migration
+  def change
+    create_table :payments do |t|
+      t.string :last4
+      t.integer :amount
+      t.string :authorization_code
+      t.integer :status, default: 0, null: false
+      t.integer :user_id, null: false
+      t.integer :conference_id, null: false
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/migrate/20160610073948_add_payment_id_to_ticket_purchases.rb b/db/migrate/20160610073948_add_payment_id_to_ticket_purchases.rb
new file mode 100644
index 00000000..133a047b
--- /dev/null
+++ b/db/migrate/20160610073948_add_payment_id_to_ticket_purchases.rb
@@ -0,0 +1,5 @@
+class AddPaymentIdToTicketPurchases < ActiveRecord::Migration
+  def change
+    add_column :ticket_purchases, :payment_id, :integer
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 6f368565..7da98fe3 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -264,6 +264,17 @@ ActiveRecord::Schema.define(version: 20160815140302) do
     t.datetime "updated_at"
   end
 
+  create_table "payments", force: :cascade do |t|
+    t.string   "last4"
+    t.integer  "amount"
+    t.string   "authorization_code"
+    t.integer  "status",             default: 0, null: false
+    t.integer  "user_id",                        null: false
+    t.integer  "conference_id",                  null: false
+    t.datetime "created_at",                     null: false
+    t.datetime "updated_at",                     null: false
+  end
+
   create_table "programs", force: :cascade do |t|
     t.integer  "conference_id"
     t.integer  "rating",               default: 0
@@ -424,6 +435,7 @@ ActiveRecord::Schema.define(version: 20160815140302) do
     t.datetime "created_at"
     t.integer  "quantity",      default: 1
     t.integer  "user_id"
+    t.integer  "payment_id"
   end
 
   create_table "tickets", force: :cascade do |t|
diff --git a/dotenv.example b/dotenv.example
index 921020d1..ec2715ea 100644
--- a/dotenv.example
+++ b/dotenv.example
@@ -37,6 +37,11 @@ OSEM_FACEBOOK_SECRET=''
 OSEM_GITHUB_KEY=''
 OSEM_GITHUB_SECRET=''
 
+# STRIPE Publishable/Secret keys
+# test keys for development mode, live for production mode
+STRIPE_PUBLISHABLE_KEY=''
+STRIPE_SECRET_KEY=''
+
 # Disable linting of factories in the test suite.
 # Speeds up turn around times of tests
 OSEM_FACTORY_LINT="false"
diff --git a/spec/controllers/conference_registration_controller_spec.rb b/spec/controllers/conference_registration_controller_spec.rb
index f0087e80..377e884e 100644
--- a/spec/controllers/conference_registration_controller_spec.rb
+++ b/spec/controllers/conference_registration_controller_spec.rb
@@ -82,9 +82,8 @@ describe ConferenceRegistrationsController, type: :controller do
           get :show, conference_id: conference.short_title
         end
 
-        it 'assigns price of purchased tickets to total_price and purchased tickets to tickets' do
-          expect(assigns(:total_price)).to eq Money.new(10000, 'USD')
-          expect(assigns(:tickets)).to match_array [@purchased_ticket]
+        it 'does not assign price of purchased tickets to total_price and purchased tickets to tickets without payment' do
+          expect(assigns(:total_price)).to eq Money.new(0, 'USD')
         end
       end
 
diff --git a/spec/factories/payments.rb b/spec/factories/payments.rb
new file mode 100644
index 00000000..4d4d3c39
--- /dev/null
+++ b/spec/factories/payments.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :payment do
+    user
+    conference
+    status 'unpaid'
+  end
+end
diff --git a/spec/features/ticket_purchases_spec.rb b/spec/features/ticket_purchases_spec.rb
index ff6957f6..d2eadfc9 100644
--- a/spec/features/ticket_purchases_spec.rb
+++ b/spec/features/ticket_purchases_spec.rb
@@ -16,7 +16,7 @@ feature Registration do
 
     context 'who is not registered' do
 
-      scenario 'purchases a ticket', feature: true, js: true do
+      scenario 'purchases and pays for a ticket succcessfully', feature: true, js: true do
         visit root_path
         click_link 'Register'
 
@@ -26,26 +26,66 @@ feature Registration do
         fill_in "tickets__#{ticket.id}", with: '2'
         expect(current_path).to eq(conference_tickets_path(conference.short_title))
 
-        click_button 'Support'
+        click_button 'Continue'
 
+        expect(current_path).to eq(new_conference_payment_path(conference.short_title))
+        expect(flash).to eq('Please pay here to get tickets.')
         purchase = TicketPurchase.where(user_id: participant.id, ticket_id: ticket.id).first
         expect(purchase.quantity).to eq(2)
-        expect(current_path).to eq(conference_conference_registration_path(conference.short_title))
-        expect(flash).
-            to eq("Thank you for supporting #{conference.title} by purchasing a ticket.")
-        expect(page.has_content?("2 #{ticket.title} Tickets for 10")).to be true
+
+        if Rails.application.secrets.stripe_publishable_key
+          find('.stripe-button-el').click
+
+          stripe_iframe = all('iframe[name=stripe_checkout_app]').last
+          sleep(5)
+          Capybara.within_frame stripe_iframe do
+            expect(page).to have_content('book your tickets')
+            page.execute_script(%{ $('input#card_number').val('4242424242424242'); })
+            page.execute_script(%{ $('input#cc-exp').val('08/22'); })
+            page.execute_script(%{ $('input#cc-csc').val('123'); })
+            page.execute_script(%{ $('#submitButton').click(); })
+            sleep(20)
+          end
+
+          expect(current_path).to eq(conference_conference_registration_path(conference.short_title))
+          expect(page.has_content?("2 #{ticket.title} Tickets for $ 10")).to be true
+        end
       end
 
-      scenario 'deletes a purchased ticket', feature: true, js: true do
-        create(:registration, conference: conference, user: participant)
-        create(:ticket_purchase, conference: conference, user: participant, ticket: ticket, quantity: 4)
+      scenario 'purchases ticket but payment fails', feature: true, js: true do
+        visit root_path
+        click_link 'Register'
 
-        visit conference_conference_registration_path(conference.short_title)
-        expect(page.has_content?("4 #{ticket.title} Tickets for 10")).to be true
+        expect(current_path).to eq(new_conference_conference_registration_path(conference.short_title))
+        click_button 'Register'
 
-        click_link "ticket-#{ticket.id}-delete"
-        expect(flash).to eq('Ticket successfully deleted.')
-        expect(TicketPurchase.count).to eq(0)
+        fill_in "tickets__#{ticket.id}", with: '2'
+        expect(current_path).to eq(conference_tickets_path(conference.short_title))
+
+        click_button 'Continue'
+
+        expect(current_path).to eq(new_conference_payment_path(conference.short_title))
+        expect(flash).to eq('Please pay here to get tickets.')
+        purchase = TicketPurchase.where(user_id: participant.id, ticket_id: ticket.id).first
+        expect(purchase.quantity).to eq(2)
+
+        if Rails.application.secrets.stripe_publishable_key
+          find('.stripe-button-el').click
+
+          stripe_iframe = all('iframe[name=stripe_checkout_app]').last
+          sleep(5)
+          Capybara.within_frame stripe_iframe do
+            expect(page).to have_content('book your tickets')
+            page.execute_script(%{ $('input#card_number').val('4000000000000341'); })
+            page.execute_script(%{ $('input#cc-exp').val('08/22'); })
+            page.execute_script(%{ $('input#cc-csc').val('123'); })
+            page.execute_script(%{ $('#submitButton').click(); })
+            sleep(20)
+          end
+
+          expect(current_path).to eq(conference_payments_path(conference.short_title))
+          expect(flash).to eq('Your card was declined. Please try again with correct credentials.')
+        end
       end
     end
   end
diff --git a/spec/models/ability_spec.rb b/spec/models/ability_spec.rb
index 720aec33..df12e8b9 100644
--- a/spec/models/ability_spec.rb
+++ b/spec/models/ability_spec.rb
@@ -105,6 +105,9 @@ describe 'User' do
       it{ should be_able_to(:index, Ticket) }
       it{ should be_able_to(:manage, TicketPurchase.new(user_id: user.id)) }
 
+      it{ should be_able_to(:new, Payment.new(user_id: user.id)) }
+      it{ should be_able_to(:create, Payment.new(user_id: user.id)) }
+
       it{ should be_able_to(:create, Subscription.new(user_id: user.id)) }
       it{ should be_able_to(:destroy, subscription) }
 
diff --git a/spec/models/payment_spec.rb b/spec/models/payment_spec.rb
new file mode 100644
index 00000000..6af28679
--- /dev/null
+++ b/spec/models/payment_spec.rb
@@ -0,0 +1,133 @@
+require 'spec_helper'
+require 'stripe_mock'
+
+describe Payment do
+
+  context 'new payment' do
+    let(:payment) { create(:payment) }
+    it 'sets status to "unpaid" by default' do
+      expect(payment.status).to eq('unpaid')
+    end
+  end
+
+  describe 'validations' do
+    it 'has a valid factory' do
+      expect(build(:payment)).to be_valid
+    end
+
+    it { is_expected.to validate_presence_of(:status) }
+
+    it { is_expected.to validate_presence_of(:user_id) }
+
+    it { is_expected.to validate_presence_of(:conference_id) }
+  end
+
+  describe '#amount_to_pay' do
+    let!(:user) { create(:user) }
+    let!(:conference) { create(:conference) }
+    let(:ticket_1) { create(:ticket, price: 10, price_currency: 'USD', conference: conference) }
+    let(:payment) { create(:payment, user: user, conference: conference) }
+
+    it ' returns correct unpaid amount' do
+      create(:ticket_purchase, ticket: ticket_1, user: user, quantity: 8)
+      expect(payment.amount_to_pay).to eq(8000)
+    end
+  end
+
+  describe '#purchase' do
+    let!(:user) { create(:user) }
+    let!(:conference) { create(:conference) }
+    let!(:ticket_1) { create(:ticket, price: 10, price_currency: 'USD', conference: conference) }
+    let!(:tickets) { {ticket_1.id.to_s => '2'} }
+    let(:stripe_helper) { StripeMock.create_test_helper }
+
+    before { StripeMock.start }
+    after { StripeMock.stop }
+
+    before { TicketPurchase.purchase(conference, user, tickets) }
+    let(:payment) { create(:payment, user: user, conference: conference, stripe_customer_token: stripe_helper.generate_card_token, stripe_customer_email: user.email) }
+
+    context 'when the payment is successful' do
+      before { payment.purchase }
+
+      it 'assigns amount' do
+        expect(payment.amount).to eq(2000)
+      end
+
+      it 'assigns last4' do
+        expect(payment.last4).to eq('4242')
+      end
+
+      it "assigns 'success' to payment.status" do
+        expect(payment.status).to eq('success')
+      end
+
+      it 'assigns authorization_code' do
+        expect(payment.authorization_code).to eq('test_ch_3')
+      end
+    end
+
+    context 'if the payment is not successful' do
+      let(:payment) { create(:payment, user: user, conference: conference, stripe_customer_token: 'bogus_card_token', stripe_customer_email: user.email) }
+
+      before { payment.purchase }
+
+      context 'when the card is invalid' do
+        it 'returns false' do
+          payment_result = payment.purchase
+          expect(payment_result).to eq false
+        end
+
+        it 'assigns "failure" to payment.status' do
+          expect(payment.status).to eq('failure')
+        end
+
+        it 'adds errors' do
+          expect(payment.errors[:base].count).to eq(1)
+        end
+      end
+
+      context 'when the connection to Stripe drops' do
+        it 'raises exception' do
+          StripeMock.prepare_error(Stripe::APIConnectionError.new)
+          expect{ payment.purchase }.not_to raise_error
+        end
+      end
+
+      context 'when there is a Stripe API Error' do
+        it 'raises exception' do
+          StripeMock.prepare_error(Stripe::APIError.new)
+          expect{ payment.purchase }.not_to raise_error
+        end
+      end
+
+      context 'when there is authentication error' do
+        it 'raises exception' do
+          StripeMock.prepare_error(Stripe::AuthenticationError.new)
+          expect{ payment.purchase }.not_to raise_error
+        end
+      end
+
+      context 'when there is a card error' do
+        it 'raises exception' do
+          StripeMock.prepare_card_error(:card_declined)
+          expect{ payment.purchase }.not_to raise_error
+        end
+      end
+
+      context 'when the request to Stripe is invalid' do
+        it 'raises exception' do
+          StripeMock.prepare_error(Stripe::InvalidRequestError.new('Your request is invalid.', code: 402))
+          expect{ payment.purchase }.not_to raise_error
+        end
+      end
+
+      context 'when Stripe rate limit exceeds' do
+        it 'raises exception' do
+          StripeMock.prepare_error(Stripe::RateLimitError.new)
+          expect{ payment.purchase }.not_to raise_error
+        end
+      end
+    end
+  end
+end
diff --git a/spec/models/ticket_spec.rb b/spec/models/ticket_spec.rb
index fc67ff3d..631ca59a 100644
--- a/spec/models/ticket_spec.rb
+++ b/spec/models/ticket_spec.rb
@@ -82,31 +82,72 @@ describe Ticket do
     end
   end
 
-  describe '#quantity_bought_by' do
-    it 'returns the correct value if the user has bought this ticket' do
-      create(:ticket_purchase,
-             user: user,
-             ticket: ticket,
-             quantity: 20)
-      expect(ticket.quantity_bought_by(user)).to eq(20)
+  describe '#unpaid?' do
+    let!(:ticket_purchase) { create(:ticket_purchase, user: user, ticket: ticket) }
+
+    context 'user has not paid' do
+
+      it 'returns true' do
+        expect(ticket.unpaid?(user)).to eq(true)
+      end
     end
 
-    it 'returns zero if the user has not bought this ticket' do
-      expect(ticket.quantity_bought_by(user)).to eq(0)
+    context 'user has paid' do
+      before { ticket_purchase.update_attributes(paid: true) }
+
+      it 'returns false' do
+        expect(ticket.unpaid?(user)).to eq(false)
+      end
+    end
+  end
+
+  describe '#quantity_bought_by' do
+    context 'user has not paid' do
+      it 'returns the correct value if the user has bought this ticket' do
+        create(:ticket_purchase,
+               user: user,
+               ticket: ticket,
+               quantity: 20)
+        expect(ticket.quantity_bought_by(user, paid: false)).to eq(20)
+      end
+
+      it 'returns zero if the user has not bought this ticket' do
+        expect(ticket.quantity_bought_by(user, paid: false)).to eq(0)
+      end
+    end
+
+    context 'user has paid' do
+      let!(:ticket_purchase) { create(:ticket_purchase, user: user, ticket: ticket, quantity: 20) }
+      before { ticket_purchase.update_attributes(paid: true) }
+
+      it 'returns the correct value if the user has bought and paid for this ticket' do
+        expect(ticket.quantity_bought_by(user, paid: true)).to eq(20)
+      end
     end
   end
 
   describe '#total_price' do
-    it 'returns the correct value if the user has bought this ticket' do
-      create(:ticket_purchase,
-             user: user,
-             ticket: ticket,
-             quantity: 20)
-      expect(ticket.total_price(user)).to eq(Money.new(100000, 'USD'))
+    context 'user has not paid' do
+      it 'returns the correct value if the user has bought this ticket' do
+        create(:ticket_purchase,
+               user: user,
+               ticket: ticket,
+               quantity: 20)
+        expect(ticket.total_price(user, paid: false)).to eq(Money.new(100000, 'USD'))
+      end
+
+      it 'returns zero if the user has not bought this ticket' do
+        expect(ticket.total_price(user, paid: false)).to eq(Money.new(0, 'USD'))
+      end
     end
 
-    it 'returns zero if the user has not bought this ticket' do
-      expect(ticket.total_price(user)).to eq(Money.new(0, 'USD'))
+    context 'user has paid' do
+      let!(:ticket_purchase) { create(:ticket_purchase, user: user, ticket: ticket, quantity: 20) }
+      before { ticket_purchase.update_attributes(paid: true) }
+
+      it 'returns the correct value if the user has bought this ticket' do
+        expect(ticket.total_price(user, paid: true)).to eq(Money.new(100000, 'USD'))
+      end
     end
   end
 
@@ -116,7 +157,7 @@ describe Ticket do
     describe 'user has bought' do
       context 'no tickets' do
         it 'returns zero' do
-          expect(Ticket.total_price(conference, user)).to eq(Money.new(0, 'USD'))
+          expect(Ticket.total_price(conference, user, paid: false)).to eq(Money.new(0, 'USD'))
         end
       end
 
@@ -126,7 +167,7 @@ describe Ticket do
         end
 
         it 'returns the correct total price' do
-          expect(Ticket.total_price(conference, user)).to eq(Money.new(100000, 'USD'))
+          expect(Ticket.total_price(conference, user, paid: false)).to eq(Money.new(100000, 'USD'))
         end
       end
 
@@ -138,7 +179,7 @@ describe Ticket do
 
         it 'returns the correct total price' do
           total_price = Money.new(200000, 'USD')
-          expect(Ticket.total_price(conference, user)).to eq(total_price)
+          expect(Ticket.total_price(conference, user, paid: false)).to eq(total_price)
         end
       end
     end
diff --git a/spec/support/external_request.rb b/spec/support/external_request.rb
index 539fe701..645067aa 100644
--- a/spec/support/external_request.rb
+++ b/spec/support/external_request.rb
@@ -1,6 +1,6 @@
 # Mock external requests to youtube
 require 'webmock/rspec'
-WebMock.disable_net_connect!(allow_localhost: true)
+WebMock.disable_net_connect!(allow_localhost: true, allow: /stripe.com/)
 
 RSpec.configure do |config|
   config.before(:each) do