Buy Now Pay Later UK — Klarna, Clearpay and the Real Cost of BNPL

Buy Now Pay Later has become one of the most widely used forms of consumer credit in the UK — Klarna alone has tens of millions of UK users, and BNPL options appear at the checkout of thousands of retailers. The products are designed to feel friction-free, but they are credit products with real consequences for missed payments and accumulating debt.

This hub explains how BNPL actually works, what Klarna and Clearpay’s products do to your finances and credit file, and how to use BNPL safely if you choose to.

For broader credit card and borrowing comparisons, see the Credit Cards section and the Loans and Borrowing Hub.

How BNPL works

Buy Now Pay Later allows you to receive goods immediately and pay for them later — either in one deferred payment, or in two to four instalments spread over weeks or months. The key features:

• No interest on most short-term products (the retailer pays the provider a commission instead)
• Available at checkout with minimal friction — often just a soft credit check
• Can be used across many retailers who have integrated the payment option
• Late fees or interest may apply if you miss an instalment

The main BNPL products in the UK

The interest-free short-term products are what most people use. The longer-term financing products (like Klarna Financing) are regulated credit agreements and work more like a traditional loan.

Klarna — how it really works

Klarna was founded in Sweden and is now one of the largest BNPL providers globally, with significant UK market presence. Understanding how its products differ matters:

Pay in 3 (most common)

• Splits your purchase into three equal payments
• First payment is taken at checkout
• Second and third at monthly intervals
• No interest if paid on time
• Late payments can incur fees and may be reported to credit agencies

Pay in 30 days

• No payment at checkout
• Full balance due 30 days after purchase
• Often used for online shopping where you might return items
• No interest, but missed payment consequences apply

Klarna credit reporting (from June 2022)

Klarna began sharing payment data with credit reference agencies in the UK from June 2022. This means:

• On-time payments may begin to build positive credit history
• Missed payments will appear on your credit file
• Multiple Klarna products open simultaneously could be visible to lenders assessing affordability

Clearpay — how it works

Clearpay splits purchases into four equal fortnightly payments. The first instalment is taken at checkout. Clearpay’s terms say it charges a £6 late fee for each late instalment and, for orders over £24, a further £6 if the instalment is still unpaid 7 days later. For orders over £24, late fees are capped at the lower of £24 or 25% of the purchase price, and no late fees are charged on orders under £24.

Clearpay shows an estimated amount you can spend in its app. Clearpay says this is not guaranteed and may differ at retailers that set their own limits.

Clearpay’s terms say missed payments may be reported to credit reference agencies. Clearpay is listed on the FCA’s register of lenders with temporary permission to offer deferred payment credit.

The risks of BNPL

BNPL is designed to make spending feel effortless — which is also its primary risk. Research consistently shows BNPL users are more likely to overspend, lose track of multiple active BNPL agreements, and face unexpected payment obligations.

Key risks

Stacking: Using BNPL across multiple retailers simultaneously means multiple repayment schedules. Missing track of outstanding balances is common.

Budget disruption: Future instalment payments can conflict with other financial commitments when they fall due.

Debt escalation: Short-term BNPL missed payments attract fees and can move to debt collection relatively quickly.

Section 75 only on newer agreements: Section 75 is available on regulated BNPL agreements taken out from 15 July 2026. Agreements taken out before that date are unregulated and do not have it, so if a retailer failed you could still owe the provider with no goods to show for it.

Return complications: If you return goods, refunds can take time to process and may not align with instalment due dates. Klarna says reporting a return in its app pauses your invoice until the store registers the return.

How to use BNPL safely

• Track all active BNPL agreements in a spreadsheet or money management app
• Set calendar reminders for each instalment date
• Only use BNPL for purchases you could afford to pay in full immediately — BNPL should be a payment timing tool, not a way to afford things you cannot pay for
• Never use BNPL for essentials like food or bills — if you’re using credit for essentials, seek free debt advice

Regulation: where things stand

The FCA started regulating Deferred Payment Credit, often known as Buy Now Pay Later, on 15 July 2026. A deferred payment credit agreement is regulated if the lender and the supplier of the goods or services are different businesses. Any agreement taken out before 15 July 2026 remains unregulated, and the new protections do not apply to it.

For regulated agreements the FCA says:

• Lenders need to check whether you can afford to repay before you take out an agreement
• Lenders now need to give you key information before you borrow, including repayment dates and how much any late fee will be
• If you are unhappy with how a lender treats you, you can complain to the Financial Ombudsman Service
• Section 75 of the Consumer Credit Act is available, the same protection you would have if you used a credit card

You can check whether a lender is authorised, or has temporary permission, on the FCA Firm Checker.

Articles in this hub

• Klarna UK — How It Works, Risks and Credit Impact
• Clearpay UK — Full Guide to How It Works

Related hubs

• Credit Scores Hub — how BNPL appears on your credit file
• Car Finance Hub — regulated consumer credit for larger purchases
• Credit Cards — the regulated alternative to BNPL with Section 75 protection