BNPL Calculator — The Real Cost of Buy Now Pay Later
BNPL debt stacking up alongside other debts?
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Get My Free Debt Plan →The trainers were £120. I clicked Pay in 3. Three payments of £40. Easy. Then I did the same with a coat. Then some furniture. Then a laptop. Six months later I had seven active BNPL plans running simultaneously and £340 leaving my account every month in payments I had completely lost track of. None of it felt like debt. All of it was.
This calculator shows you the real cost of each BNPL plan — including what one missed payment actually costs — and stacks all your active plans together so you can see the true monthly damage. From July 15 2026 all BNPL agreements come under full FCA regulation and will appear on your credit file.
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Mathematical Estimation only. Not financial advice. UK: StepChange. US: NFCC.
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FCA Regulation — What Changes from July 15 2026
What the FCA regulation means for UK users
From 15 July 2026, all BNPL providers operating in the UK must be FCA authorised. All BNPL agreements must carry affordability checks. All missed payments will be reported to UK credit reference agencies — Experian, Equifax and TransUnion. A missed Klarna payment will now affect your mortgage application the same way a missed credit card payment does.
The Debt Stacking Problem
BNPL debt stacking is when multiple simultaneous plans combine into a monthly obligation that is genuinely unmanageable. It happens gradually — each individual plan looks affordable at the checkout. But £40 + £55 + £80 + £60 + £70 = £305 every month before you have paid a single bill. The stacking calculator in this tool is the only free tool that shows you this total in one place.
What Happens If You Miss a BNPL Payment — UK
Missed payment consequences — UK providers
Klarna: No late fee currently but missed payments now reported to UK credit agencies. Repeated missed payments can result in your Klarna account being suspended.
Clearpay: £6 late fee per missed payment, capped at £36 or 25% of order value. Reports to UK credit agencies.
PayPal Pay in 3: No late fee but reports missed payments to UK credit agencies.
Laybuy: £10 late fee per missed payment. Reports to UK credit agencies.
BNPL adding to existing debt problems?
See what BNPL is really costing you alongside your other debts and get a prioritised payoff plan. Free.
See My Full Debt Cost →Frequently Asked Questions — BNPL Calculator
Does BNPL affect my credit score in the UK in 2026?
Yes — from July 15 2026 all FCA-regulated BNPL agreements are reported to UK credit reference agencies. Missed payments will appear on your credit file and affect your score in the same way as missed credit card payments. Klarna, Clearpay and PayPal Pay in 3 are all affected.
Does BNPL affect credit in the US?
Yes. Klarna, Afterpay and Affirm are the main US BNPL providers. Klarna and Afterpay report to credit bureaus in the US. Missed payments affect your FICO score. Affirm reports all activity — on-time payments can actually help build credit. The Consumer Financial Protection Bureau (CFPB) has been pushing for stricter BNPL regulation since 2023. Check consumerfinance.gov for the latest rules.
Is BNPL considered debt?
Yes. BNPL is a form of short-term credit. In the UK from July 2026 it is treated as regulated credit under FCA rules. In the US the CFPB classifies BNPL as a consumer financial product. It appears in affordability assessments and increasingly on credit files. The fact that it felt like a payment method at checkout does not change its legal classification as debt.
What is the danger threshold for BNPL debt stacking?
When your combined BNPL monthly payments exceed 10% of your monthly take-home income you are in the danger zone. Three or more simultaneous plans puts most people over this threshold. The stacking calculator in this tool flags this automatically.
Can BNPL debt be included in a debt management plan?
UK: Yes. From July 2026, BNPL debt is regulated credit and can be included in a Debt Management Plan (DMP) through StepChange. US: Contact NFCC at nfcc.org for advice on including BNPL in a debt management plan.
What should I do if I cannot make a BNPL payment?
Contact the provider immediately before the payment date. Most providers have hardship options and can defer a payment without a late fee if you contact them proactively. UK: If BNPL is contributing to a wider debt problem contact StepChange on 0800 138 1111. US: Contact NFCC at nfcc.org for free help.
Related reading: How to Pay Off Debt — Complete Guide · Minimum Payment Trap Calculator · Credit Card Interest Calculator
Disclaimer: DebtShift is an educational platform. Results are mathematical estimations. Not financial advice. UK: BNPL provider fees and terms change frequently — verify directly with your provider. From July 15 2026 BNPL is FCA regulated in the UK. For free debt advice contact StepChange 0800 138 1111 (UK) or NFCC nfcc.org (US). DebtShift is not FCA regulated.