diff --git a/app/policies/account_policy.rb b/app/policies/account_policy.rb
index bd8fc7b98..7a51fe1af 100644
--- a/app/policies/account_policy.rb
+++ b/app/policies/account_policy.rb
@@ -58,4 +58,21 @@ class AccountPolicy < ApplicationPolicy
   def change_pricing_plan?
     @account_user.administrator?
   end
+
+  # V2 Billing API actions
+  def pricing_plans?
+    @account_user.administrator?
+  end
+
+  def topup_options?
+    @account_user.administrator?
+  end
+
+  def topup?
+    @account_user.administrator?
+  end
+
+  def subscribe?
+    @account_user.administrator?
+  end
 end
diff --git a/app/views/api/v1/models/_account.json.jbuilder b/app/views/api/v1/models/_account.json.jbuilder
index 463db1cd3..8104865c6 100644
--- a/app/views/api/v1/models/_account.json.jbuilder
+++ b/app/views/api/v1/models/_account.json.jbuilder
@@ -5,8 +5,10 @@ if resource.custom_attributes.present?
     json.plan_name resource.custom_attributes['plan_name']
     json.subscribed_quantity resource.custom_attributes['subscribed_quantity']
     json.subscription_status resource.custom_attributes['subscription_status']
-    json.subscription_ends_on resource.custom_attributes['subscription_ends_on']
+    json.subscription_ends_at resource.custom_attributes['subscription_ends_at']
+    json.subscription_cancelled_at resource.custom_attributes['subscription_cancelled_at'] if resource.custom_attributes['subscription_cancelled_at'].present?
     json.stripe_subscription_id resource.custom_attributes['stripe_subscription_id'] if resource.custom_attributes['stripe_subscription_id'].present?
+    json.stripe_plan_id resource.custom_attributes['stripe_plan_id'] if resource.custom_attributes['stripe_plan_id'].present?
     json.stripe_billing_version resource.custom_attributes['stripe_billing_version'] if resource.custom_attributes['stripe_billing_version'].present?
     json.stripe_customer_id resource.custom_attributes['stripe_customer_id'] if resource.custom_attributes['stripe_customer_id'].present?
     if resource.custom_attributes['pending_stripe_pricing_plan_id'].present?
diff --git a/config/routes.rb b/config/routes.rb
index 7c6bdcf27..a84db1282 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -444,7 +444,7 @@ Rails.application.routes.draw do
 
         namespace :v2 do
           resources :accounts, only: [] do
-            resource :billing, only: [] do
+            resource :billing, only: [], controller: 'billing' do
               get :credit_grants
               get :pricing_plans
               get :topup_options
diff --git a/enterprise/app/controllers/enterprise/api/v2/billing_controller.rb b/enterprise/app/controllers/enterprise/api/v2/billing_controller.rb
index 460c67bc4..bad22e3b1 100644
--- a/enterprise/app/controllers/enterprise/api/v2/billing_controller.rb
+++ b/enterprise/app/controllers/enterprise/api/v2/billing_controller.rb
@@ -1,6 +1,6 @@
 class Enterprise::Api::V2::BillingController < Api::BaseController
   before_action :fetch_account
-  before_action :check_authorization
+  before_action :check_billing_authorization
   before_action :validate_topup_amount, only: [:topup]
 
   rescue_from StandardError, with: :render_error
@@ -46,7 +46,10 @@ class Enterprise::Api::V2::BillingController < Api::BaseController
 
   def cancel_subscription
     service = Enterprise::Billing::V2::CancelSubscriptionService.new(account: @account)
-    result = service.cancel_subscription
+    result = service.cancel_subscription(
+      reason: params[:reason],
+      feedback: params[:feedback]
+    )
 
     if result[:success]
       # Include account ID and updated attributes for frontend store update
@@ -111,4 +114,8 @@ class Enterprise::Api::V2::BillingController < Api::BaseController
   def render_not_implemented(exception)
     render json: { error: exception.message }, status: :not_implemented
   end
+
+  def check_billing_authorization
+    authorize(@account, "#{action_name}?".to_sym)
+  end
 end
diff --git a/enterprise/app/services/enterprise/billing/v2/cancel_subscription_service.rb b/enterprise/app/services/enterprise/billing/v2/cancel_subscription_service.rb
index 82f5d1b0b..b9aac176c 100644
--- a/enterprise/app/services/enterprise/billing/v2/cancel_subscription_service.rb
+++ b/enterprise/app/services/enterprise/billing/v2/cancel_subscription_service.rb
@@ -8,14 +8,16 @@ class Enterprise::Billing::V2::CancelSubscriptionService < Enterprise::Billing::
   # Creates a deactivate billing intent for the pricing plan subscription
   # Subscription remains active until the end of the current billing period
   #
+  # @param reason [String] Optional cancellation reason
+  # @param feedback [String] Optional additional feedback
   # @return [Hash] { success:, cancel_at_period_end:, period_end:, message: }
   #
-  def cancel_subscription
+  def cancel_subscription(reason: nil, feedback: nil)
     with_locked_account do
       metadata = fetch_subscription_metadata
       intent_params = build_deactivate_params(metadata[:subscription_id], metadata[:cadence_id])
       execute_billing_intent(intent_params)
-      update_account_status(metadata[:next_billing_date])
+      update_account_status(metadata[:next_billing_date], reason: reason, feedback: feedback)
       build_success_response
     end
   rescue Stripe::StripeError => e
@@ -40,14 +42,18 @@ class Enterprise::Billing::V2::CancelSubscriptionService < Enterprise::Billing::
     }
   end
 
-  def update_account_status(next_billing_date)
+  def update_account_status(next_billing_date, reason: nil, feedback: nil)
     # Mark subscription as cancelling (will be cancelled at period end)
     # Store next_billing_date so the UI can show when the subscription ends
-    update_custom_attributes({
-                               'subscription_status' => 'cancel_at_period_end',
-                               'subscription_cancelled_at' => Time.current.iso8601,
-                               'subscription_ends_at' => next_billing_date
-                             })
+    attributes = {
+      'subscription_status' => 'cancel_at_period_end',
+      'subscription_cancelled_at' => Time.current.iso8601,
+      'subscription_ends_at' => next_billing_date
+    }
+    attributes['cancellation_reason'] = reason if reason.present?
+    attributes['cancellation_feedback'] = feedback if feedback.present?
+
+    update_custom_attributes(attributes)
   end
 
   def build_success_response
diff --git a/enterprise/app/services/enterprise/billing/v2/topup_catalog.rb b/enterprise/app/services/enterprise/billing/v2/topup_catalog.rb
index 1106a15ed..284ea33c5 100644
--- a/enterprise/app/services/enterprise/billing/v2/topup_catalog.rb
+++ b/enterprise/app/services/enterprise/billing/v2/topup_catalog.rb
@@ -1,9 +1,9 @@
 module Enterprise::Billing::V2::TopupCatalog
   DEFAULT_TOPUPS = [
     { credits: 1000, amount: 20.0 },
-    { credits: 2000, amount: 40.0 },
-    { credits: 3000, amount: 60.0 },
-    { credits: 4000, amount: 80.0 }
+    { credits: 2500, amount: 50.0 },
+    { credits: 5000, amount: 100.0 },
+    { credits: 10_000, amount: 200.0 }
   ].freeze
 
   module_function