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# PaymentCardTransactionRequest.TransactionAmountDescription.installment(_:amount:payments:)

The total amount authorized upfront. The customer pays the specified amount on each payment cycle.
Only allowed for [`PaymentCardTransactionRequest.TransactionType.purchase`](/documentation/ProximityReader/PaymentCardTransactionRequest/TransactionType/purchase)

```
case installment(PaymentCardTransactionRequest.PaymentCycle, amount: Decimal, payments: Int)
```

## Parameters

`amount`

The amount the payment processor deducts from the card for each installment.

`payments`

The number of payments for the deducted amount.
Must be greater than `0`, otherwise the description won’t appear in the UI.

---

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