# Buy Now Pay Later and Promo Codes: Fees and Rules

Updated Oct 16, 2026 · https://yapromo.com/guides/buy-now-pay-later-and-promo-codes/

Buy now, pay later splits the checkout total into instalments, so a promo code you apply at checkout should lower every payment. No provider page we read says this outright; it is our inference from the fact that schedules and fee caps are based on the final order value. Fees vary a lot: PayPal and Tamara say they charge no late fees, while Klarna US, Afterpay and Clearpay publish capped late fees.

## How promo codes fit with instalments

**This section is our inference, not a quoted provider rule.** Afterpay and Klarna base their payment schedules and late-fee caps on the purchase or order value at checkout ([Afterpay](https://www.afterpay.com/en-US/installment-agreement), [Klarna US](https://cdn.klarna.com/1.0/shared/content/legal/terms/0/en_us/sliceitinx)). That suggests a code entered at the store's checkout comes off the order before the plan is created, so each instalment is smaller.

Two official points do touch on codes directly:

- **Tabby:** you cannot earn Tabby cashback and use a coupon code on the same purchase ([Tabby help](https://tabby.ai/en-AE/help/help-cashback-and-referrals/can-i-earn-cashback-and-use-a-coupon-code)). Tabby cashback comes from shopping at partner stores opened through the Tabby app, whether or not you pay with Tabby ([Tabby cashback](https://tabby.ai/en-AE/help/help-cashback-and-referrals/how-does-tabby-cashback-work)).

- **Tamara:** its Saudi site says Tamara Smart partner deals apply automatically or through promo codes at the store's checkout ([Tamara KSA](https://tamara.co/en-SA)).

Klarna US also says combined offers can affect cashback earned through its rewards ([Klarna rewards](https://www.klarna.com/us/rewards/)).

## United States: Klarna, Afterpay, PayPal

- **Klarna Pay in 4:** four payments, every two weeks after the first. The first is due when the merchant confirms the order, usually the shipping date. 0% APR. A late fee of up to $7 once a payment is 10 days overdue, with total late fees capped at 25% of the purchase. Klarna says it uses credit checks that do not affect your score. A return does not reduce what you owe until the merchant sends Klarna a credit ([terms, June 3, 2026](https://cdn.klarna.com/1.0/shared/content/legal/terms/0/en_us/sliceitinx)).

- **Klarna Pay in 30:** nothing upfront; the 30 days start when the order ships. No interest or fees if paid on time. You can pause payment while returning items ([Klarna](https://www.klarna.com/us/payments/pay-in-30-days/)). Klarna's longer financing through WebBank runs 3 to 24 months at 0.00% to 35.99% APR, with a credit check ([Pay over time](https://www.klarna.com/us/payments/pay-over-time/)).

- **Afterpay:** a payment at purchase, then three or four more; Afterpay's example has payments every two weeks. No interest on the standard product, though a financed version from First Electronic Bank can carry up to 36% APR. A late fee only after 10 days overdue, up to $8, capped at 25% of the order value; no late fees in Rhode Island. A merchant refund reduces your balance, starting with your last payment for partial refunds ([agreement](https://www.afterpay.com/en-US/installment-agreement)).

- **PayPal Pay in 4:** $10 to $2,000, first payment at purchase then three more every two weeks. No interest, late fees or sign-up fees. Not available in Missouri ([PayPal US](https://www.paypal.com/us/digital-wallet/ways-to-pay/buy-now-pay-later)).

## United Kingdom: Klarna, Clearpay, PayPal

- **Klarna UK:** Klarna says BNPL became regulated at 00:00 on 15 July 2026, with new agreements for Pay in 3 and Pay in 30 days after that date. Klarna Financial Services UK Ltd is FCA-authorised ([Klarna UK terms](https://www.klarna.com/uk/terms-and-conditions/)). We could not read Klarna's current UK late-fee terms, so we do not quote a figure.

- **Clearpay:** four interest-free instalments; the terms do not state the frequency. Late fees of £6, plus another £6 if still unpaid 7 days later. For orders over £24 the total is capped at the lower of £24 or 25% of the price. The terms conflict on orders under £24: one section says no late fees, the footer says a £6 cap. Clearpay uses a soft credit check and says it is deemed authorised by the FCA under the temporary permission regime ([Clearpay terms](https://www.clearpay.co.uk/en-GB/terms-of-service)).

- **PayPal Pay in 3:** £20 to £3,000 at 0% APR, first payment at checkout then two monthly payments. No late fees. Repayment history is shared with TransUnion ([PayPal UK](https://www.paypal.com/uk/digital-wallet/ways-to-pay/buy-now-pay-later)).

## UAE and Saudi Arabia: Tabby and Tamara

- **Tabby:** Pay in 4 with no interest or fees, according to Tabby; a service fee may apply to plans longer than four payments. Limits depend on your history, basket and store. Tabby says it is regulated by the UAE Central Bank ([Tabby](https://tabby.ai/en-AE/pay-later)). Missed payments bring "collection charges", with no amount published, block new purchases and can hurt your credit score ([missed payments](https://tabby.ai/en-AE/help/help-pay-later/what-happens-if-i-miss-a-payment)). A partial refund reduces upcoming instalments; store credit leaves them unchanged ([refunds](https://tabby.ai/en-AE/help/help-orders/how-and-when-will-i-receive-my-refund)).

- **Tamara:** announced it was ending late fees from 16 December 2023 ([Tamara](https://tamara.co/en/no-late-fee)). Its KSA terms say no interest and no late payment penalties; failed payments are retried every two days and late payments may be reported to credit bureaus ([KSA terms](https://tamara.co/en-SA/terms-and-conditions)). The UAE terms describe paying in up to four instalments with no late fees, and say Tamara Smart cashback can be taken back if the purchase is refunded ([UAE terms](https://tamara.co/en-AE/terms-and-conditions)). Tamara Smart is a paid membership with a free first month; the monthly fee appeared as 19 but the currency did not display clearly on the page.

## Comparison table

|  | Provider | Market | Standard plan | Interest | Late fees (as published)

 | Klarna Pay in 4 | US | 4 payments, every 2 weeks | 0% APR | Up to $7 after 10 days; capped at 25%

 | Afterpay | US | Down payment + 3 or 4 payments | None on standard plan | Up to $8 after 10 days; capped at 25%

 | PayPal Pay in 4 | US | 4 payments, every 2 weeks; $10–$2,000 | None | None

 | Clearpay | UK | 4 instalments | None | £6 + £6 after 7 days; cap lower of £24 or 25% (orders over £24)

 | PayPal Pay in 3 | UK | 3 payments, monthly; £20–£3,000 | 0% APR | None

 | Tabby Pay in 4 | UAE | 4 payments | None | Collection charges; amount not published

 | Tamara | KSA, UAE | Up to 4 instalments | None | None, per its terms

For India, we could not confirm current official terms for Simpl or LazyPay, so they are not included.

## What regulators require

- **UK:** the FCA confirmed final BNPL rules on 11 February 2026, with protections from 15 July 2026: clear upfront information, proportionate affordability checks, support in financial difficulty and complaints to the Financial Ombudsman Service ([FCA](https://www.fca.org.uk/news/press-releases/new-protections-confirmed-buy-now-pay-later-borrowers)).

- **US:** the CFPB's May 2024 interpretive rule treated BNPL lenders like card issuers for disputes and refunds ([CFPB 2024](https://www.consumerfinance.gov/archive/newsroom/cfpb-takes-action-to-ensure-consumers-can-dispute-charges-and-obtain-refunds-on-buy-now-pay-later-loans/)). The CFPB withdrew it on 12 May 2025 ([CFPB BNPL page](https://www.consumerfinance.gov/compliance/compliance-resources/consumer-cards-resources/buy-now-pay-later-bnpl-products/)).

- **Saudi Arabia:** SAMA's BNPL rules, issued 17 December 2023, allow no consumer fees except delay penalties and debt-collection fees, bar stores from adding charges, cap plans at 12 instalments and total outstanding BNPL at SAR 10,000 per consumer, and require refund procedures in the contract ([SAMA rulebook](https://rulebook.sama.gov.sa/en/node/6523)).

## FAQ

**Does a promo code reduce my instalments?**
Very likely, if you apply it at the store checkout before choosing BNPL. This is our inference: providers base plans on the final order value, but none of the pages we read states it directly.

**Can I use a coupon code and still get Tabby cashback?**
No. Tabby says you cannot earn Tabby cashback and use a coupon code on the same purchase.

**What happens to my plan if I return something?**
It depends on the provider. Afterpay reduces your balance when the merchant refunds. Tabby reduces upcoming instalments for a partial refund. Klarna US says you keep paying until the merchant sends Klarna a credit.

**Which BNPL providers charge no late fees?**
PayPal Pay in 4 (US), PayPal Pay in 3 (UK) and Tamara say they charge no late fees. Klarna US, Afterpay and Clearpay publish capped late fees.