How do I set up recurring billing software for proration, refunds, and chargebacks in a subscription game platform?

To set up recurring billing for a subscription game platform, design it as a billing engine + payment processor integration + entitlement system. The key is to make billing events and game access changes idempotent, auditable, and recoverable.

1) Core pieces you need

A. Subscription state model

Track each subscription with fields like:

• subscription_id
• user_id
• plan_id
• status (trialing, active, past_due, canceled, paused, expired)
• billing_cycle_anchor
• current_period_start
• current_period_end
• auto_renew
• payment_method_id
• cancel_at_period_end
• grace_period_end

B. Entitlement system

Do not rely only on “payment succeeded” to grant access. Maintain a separate entitlement layer:

• has_access_to_game
• access_start
• access_end
• features_enabled
• account_hold_reason

This lets you handle refunds, chargebacks, and grace periods cleanly.

C. Ledger

Use a double-entry or at least immutable transaction ledger to record:

• subscription charges
• prorations
• refunds
• chargeback reversals
• taxes
• coupons/discounts
• credits/debits to user balance

This is critical for reconciliation.

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2) Recurring billing flow

Monthly renewal flow

1. Subscription reaches renewal date.
2. Create invoice for the next cycle.
3. Apply taxes, discounts, credits, and any proration.
4. Attempt payment automatically.
5. If successful:
   • mark invoice paid
   • extend subscription period
   • keep or restore entitlements
6. If failed:
   • mark invoice unpaid/past_due
   • retry according to dunning rules
   • optionally enter grace period
   • eventually suspend access if unresolved

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3) Proration handling

Proration is needed when a user upgrades, downgrades, or changes billing frequency mid-cycle.

Common cases

• Upgrade mid-cycle: charge the difference for the remaining time.
• Downgrade mid-cycle: usually issue credit for unused time, applied to next invoice or as account balance.
• Switch monthly → yearly: calculate remaining value of current plan and credit it toward the new annual plan.

Example calculation

If a user pays $10/month and upgrades after 15 days to a $20/month plan:

• Remaining half-month value on old plan = $5 credit
• Remaining half-month cost on new plan = $10
• Immediate proration charge = $5

Recommended rules

• Prorate only for plan changes initiated by the customer or admin.
• Do not prorate if the subscription is canceled at period end.
• Round consistently, ideally in the smallest currency unit.
• Store the exact proration line item on the invoice.

Implementation tip

Have a function like:

• calculateProration(old_plan, new_plan, current_period_start, current_period_end, change_time)

Return:

• credit amount
• debit amount
• net amount
• invoice line items

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4) Refund handling

Refund types

• Full refund: return the full payment amount.
• Partial refund: refund part of a charge.
• Proration-based refund: refund unused service time, usually as a policy choice.

Refund policy design

Define explicit business rules:

• Refunds only within X days?
• Refund only if usage below threshold?
• Refund original payment method or as store credit?
• What happens to access after refund?

Operational flow

1. Admin or automated policy approves refund.
2. Create refund transaction linked to the original charge.
3. Post a negative ledger entry.
4. Update invoice/payment status.
5. Revoke or reduce entitlement if the refund invalidates access.

Important

If the user already consumed service and you still refund, decide whether:

• you keep access until period end, or
• you revoke immediately

Make this policy consistent and documented.

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5) Chargeback handling

Chargebacks are not the same as refunds. A chargeback is initiated by the cardholder via their bank.

Flow

1. Payment processor notifies you of dispute/chargeback webhook.
2. Mark the charge as disputed.
3. Temporarily suspend or limit entitlements based on risk policy.
4. Collect evidence:
   • login history
   • IP/device records
   • purchase confirmation
   • terms acceptance
   • gameplay/access logs
5. Submit dispute response before deadline.
6. If lost:
   • mark charge as reversed
   • reverse entitlements if appropriate
   • add fee to ledger
   • block account if fraud risk is high

Best practices

• Keep evidence retention for at least the dispute window.
• Log every access-granting and payment event.
• Use webhook-driven state updates.
• Do not manually “guess” chargeback outcomes; rely on payment processor events.

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6) Dunning and failed payment recovery

For recurring billing, you need a retry strategy:

• immediate retry
• retry after 1 day
• retry after 3 days
• retry after 5 days

During dunning:

• keep access in grace period if policy allows
• send email/app notifications
• prompt for updated card

If retries fail:

• mark subscription past_due or suspended
• revoke access after grace period

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7) Suggested architecture

Services

• Billing service: creates invoices, handles prorations, refunds, retries
• Payment gateway adapter: Stripe/Adyen/Braintree/etc.
• Entitlement service: grants/revokes game access
• Webhook processor: handles payment events
• Ledger service: records financial entries
• Notification service: emails, push notifications

Event-driven pattern

Use events like:

• subscription.created
• invoice.generated
• payment.succeeded
• payment.failed
• refund.issued
• chargeback.opened
• chargeback.lost
• entitlement.granted
• entitlement.revoked

This makes the system easier to audit and recover.

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8) Data model essentials

At minimum, store:

Subscription

• status
• plan
• cycle dates
• auto-renew flag

Invoice

• invoice id
• subscription id
• amount due
• line items
• tax
• proration lines
• status

Payment

• payment id
• invoice id
• processor transaction id
• amount
• status
• failure reason

Refund

• refund id
• payment id
• amount
• reason
• processor refund id

Dispute/chargeback

• dispute id
• payment id
• status
• evidence submitted
• outcome
• fee amount

Entitlement

• user id
• product/game id
• start/end dates
• current status

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9) Integration advice

If you’re not building a billing processor from scratch, use a provider such as:

• Stripe Billing
• Adyen
• Braintree
• Chargebee/Recurly as a billing layer

These usually support:

• subscriptions
• automatic invoicing
• prorations
• refunds
• disputes webhooks
• dunning

Still, you should keep your own entitlement and ledger logic, because games often need access control separate from payment status.

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10) Practical policies for a game platform

A good default policy set:

• Upgrade: apply immediate proration charge
• Downgrade: issue credit to next invoice
• Cancel at period end: no refund, access until end of term
• Refund request within 7 days and low usage: partial or full refund
• Chargeback opened: suspend premium access pending review
• Chargeback lost: revoke access and block payment method/account if necessary
• Payment failed: grace period of 3–7 days before suspension

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11) Testing checklist

Test these scenarios thoroughly:

• renewal success/failure
• upgrade with proration
• downgrade with proration credit
• cancel at period end
• cancel immediately
• full refund after payment
• partial refund
• chargeback opened/lost/won
• webhook delivered twice
• processor outage/retry
• timezone and billing cycle edge cases

Use idempotency keys for every invoice/payment/refund action.

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12) Key recommendation

Do not make access decisions directly from payment events alone. Instead:

Payment events update subscription state, subscription state updates entitlements, and a ledger records everything.

That separation is what keeps proration, refunds, and chargebacks manageable.

If you want, I can also give you:

1. a database schema,
2. a state machine diagram, or
3. a Stripe-based implementation example for this setup.