'Buy now, pay later' schemes explained

Find out how BNPL schemes such as Klarna, Clearpay and PayPal Pay in 3 work, how they compare to credit cards, and what happens if you miss repayments
Hannah Downes

How buy now, pay later schemes work

Buy now, pay later (BNPL) schemes are a form of short-term credit.

Typically, the schemes allow you to pay for items in instalments or in one repayment at a later date, interest-free. Repayment plans normally last 12 months or less.

Many of the schemes are unregulated, which means you won't benefit from the same protections you get when paying with a credit card.

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How Klarna, Clearpay, PayPal and Zilch compare

Klarna, Clearpay, PayPal and Zilch are the biggest BNPL providers in the UK. 

But the industry is rapidly growing and there are new providers offering different schemes all the time. Many banks now also offer their own regulated BNPL schemes for existing customers.

No two BNPL schemes are the same, so it’s important to double-check how they work before signing up for a new one.

Which? research in 2021 found some retailers offer as many as six BNPL schemes at the checkout, but it’s not always clear how they differ in terms of late fees, credit checks or repayments.

In the table, we look at some of the key differences between the biggest BNPL providers and the main options they provide to retailers.

Clearpay 'Pay in 4 instalments'Four payments over six weeksYesYesYes - a £6 late fee, followed by a further £6 fee if a payment is still unpaid 7 days after the due date. Late fees are capped at £24 or 25% of the order value, whichever is less.Clearpay does not carry out credit checks. Clearpay starts by giving customers a low lending limit which increases if they make repayments on time.NoYes, but only after every reasonable attempt to contact the customer with outstanding payments has been made. It does not make house visits and does not sell debt on to third parties.
Klarna 'Pay in 3 instalments'Three payments over two monthsYesYesYes, you'll be charged £5 or 25% of the order value if your order is below £20. You can be charged a maximum of two late fees per order.Soft checkMissed payments (and on-time payments) for purchases are recorded on your Experian and TransUnion credit reports. Your overall credit score won't be impacted for now, but it will be visible to other lenders.Yes, Klarna might pass ownership of certain debts on to an external third party but only where the debt remains unpaid more than 365 days after the due date.
Klarna 'Pay in 30 days'You pay up to 30 days after placing your orderNo, but you can set up autopay for Pay in 30 paymentsYesYes, you'll be charged £5 or 25% of the order value if your order is below £20. You can be charged a maximum of two late fees per order.Soft checkMissed payments (and on-time payments) for purchases are recorded on your Experian and TransUnion credit reports. Your overall credit score won't be impacted for now, but it will be visible to other lenders.Yes, Klarna might pass ownership of certain debts on to an external third party but only where the debt remains unpaid more than 365 days after the due date.
PayPal 'Pay in 3'Three payments over two monthsYesYou may be eligible for a free 'Payment Holiday Program' if you're experiencing short-term financial hardship. This payment holiday is available once per loan and moves the next payment back by one month.NoPayPal says it runs soft credit checks if neededPay in 3 does not currently impact your credit score, but your purchases and repayment history are reported to a credit reference agency which may still impact your ability to access credit elsewhere.Yes, but only after making repeated attempts to contact a customer about outstanding payments. PayPal says it makes efforts to support those who are experiencing financial difficulty.
ZilchYou can either pay over three months or over six weeks. For both options, you make one upfront payment, and then pay the remainder over three fortnightly or monthly instalments.YesPay over 6 weeks' customers can delay instalments by four days (although some eligible customers can delay payments for eight days). 'Pay over 3 months' customers can snooze repayments for eight days.NoSoft checkYes, Zilch says that missing payments can negatively impact your credit score.Yes, Zilch may pass a customer's account to a debt management agency if they have outstanding payments for more than 70 days.

Table last updated August 2025

*Some BNPL schemes take payments automatically using card details you provide at the time of payment. Others ask you to make your repayments manually within the timeframe agreed.

**You may be able to delay repayments to a later date with some BNPL schemes, it's important to check exactly how this works with your BNPL provider.

***A soft credit check is where companies take an initial look at certain information on your credit report. They aren't visible to other companies and have no impact on your credit score or future credit applications. Only you can see these checks on your report. A hard credit check is where companies carry out a more in-depth search on your credit report. This will be recorded on your report, so other companies will be able to see you applied for credit. Hard credit checks can affect your credit score.

What’s the difference between BNPL and credit cards?

Though they’re both a form of credit, BNPL schemes work differently from credit cards.

One of the key differences is that you don’t get Section 75 protection when you pay with a BNPL scheme.

Section 75 protection means your bank is jointly liable if anything goes wrong with purchases worth over £100 and up to £30,000 made on your credit card. If you experience a missing delivery or faulty product, for example, you can make a Section 75 claim with your credit card provider and get the money back this way.

As BNPL schemes aren’t covered by Section 75, you should consider using your credit card for larger purchases.

Here are some other key differences between BNPL schemes and 0% credit cards to take into account before deciding which type of credit is best for you.


BNPL schemes0% credit cards
Section 75 protectionNo - you’ll be at the mercy of the BNPL provider’s individual protection scheme which isn’t enshrined in lawYes
Type of credit checkIt depends on the provider, but most only carry out a ‘soft’ credit checkHard credit checks
Timeframe for interest-free periodTypically within six weeks - always within 12 monthsBetween three and 25 months with a new 0% credit card deal
ComplaintsYou can only complain to the individual BNPL providers, not to the Financial Ombudsman Service You can escalate your complaint to the Financial Ombudsman Service 
Additional feesWith some providers you’ll be charged late fees if you miss your repaymentsYou’ll have a monthly minimum repayment you have to make or face extra fees

Buy now, pay later alternatives

If you’re unsure about using BNPL but still want to access credit, there are other options.

Charity-owned lender, Fair for You, has launched a new shopping card loan, backed by a number of UK retailers as an alternative to BNPL.

You can apply for an initial loan of between £50 and £350, which is then loaded onto a prepaid Mastercard. This can be used online or in-store with a selection of partnered retailers, including Argos, Iceland Foods, Euronics, Dunelm, Habitat, Dorset Home Stores and ChemistDirect.

Fair for You carries out credit searches when you submit your loan application, which will show on your credit file and may be factored into your credit score. Before applying, you can try its eligibility checker (which doesn’t leave any marks on your credit report) to see if you’re likely to qualify.

Unlike with BNPL schemes, you do incur interest on your Fair for You loan. The interest rate is 51% per annum (equivalent to 64.8% APR). The shorter the loan period you choose, the less interest you pay overall.

Your repayment schedule is flexible: you can pay weekly, fortnightly or monthly. You can also reschedule repayments, or pay off your balance early, without incurring additional charges

Can I use a credit card to pay off buy now, pay later debt?

Klarna and Clearpay accept credit cards as payment.

Zilch does not accept credit cards and told Which? it believed it was an ‘irresponsible practice that risks compounding the debt problem’.

In response, Klarna said it monitors credit card use closely for signs that it may be being used unwisely. 

Clearpay told us its latest data shows that 90% of transactions are paid with a debit card.

PayPal’s Pay in 3 only accepts debit cards and bank accounts linked to your PayPal account as repayment methods.

Credit scores and late fees: what are the risks of using buy now, pay later?

As with all types of credit, there are risks if you miss BNPL repayments.

Your credit score could be impacted if you don’t pay your instalments and, if you continue to miss repayments, some BNPL providers will refer you to a debt collection agency.

Having a poor credit score could impact your ability to borrow in the future.

Though you won’t incur interest on your repayments, some BNPL schemes do charge late fees if you miss your repayments, meaning your purchase could end up costing far more than you’d planned.

Previous Which? research has shown that almost a quarter of BNPL users spend more when using the schemes then they usually do. As most BNPL providers don’t run hard credit or affordability checks before lending you money, it’s important to make sure you can afford the repayments before committing.

What protections do I have if something goes wrong?

Unfortunately, you’re not covered by Section 75 protection when you use BNPL schemes, nor can you escalate a complaint to the Financial Ombudsman Service (FOS) like you can with other regulated credit products.

If you experience an issue with something you paid for with a BNPL scheme, such as a missing delivery or faulty item, you’ll need to look at the BNPL provider’s protection scheme instead.

Each BNPL firm will have its own policy for you to follow if you run into trouble with your purchase. Most ask that you try to resolve the problem directly with the retailer to begin with.

Which? has previously heard from customers who have been left waiting for refunds or for outstanding payments to be settled after returning unwanted items purchased with a BNPL scheme. One JD Sports customer waited over three weeks for a refund to come through after returning a pair of trainers.

If you find yourself in a similar situation or experience another type of issue with your purchase or repayment plan, you should contact the BNPL provider as soon as possible to ask them to freeze your upcoming payments.

Be sure to collect as much evidence as possible - such as photos of faulty items or failed deliveries and screenshots of messages from the retailer - in case you struggle to get it resolved.

What happens if the retailer I've bought from goes bust?

If you’ve bought something with a BNPL scheme and the retailer falls into administration, you’ll still have to continue meeting your repayments as normal if you want to keep the items.

This is because BNPL providers pay upfront for your items when you place your order - you are simply paying them back with your instalments.

When retailers go bust, the administrators can decide to stop honouring returns - meaning you could be stuck having to continue making repayments for items you don’t want.

Here’s what each provider told us you should do if you've paid with a BNPL scheme and are refused a refund:

  • Klarna told us you should raise a dispute with it as normal and the company will let you know how it can offer support - this could include offering a refund for unwanted or damaged items.
  • Clearpay told us it will refund you in accordance with your rights if you notify it that you intend to or have returned the goods. If you don’t receive your items, it will refund you or cancel your debt. It says you won’t ever be in a position where you’re out of pocket or lose your legal rights to return.
  • PayPal says you can raise a dispute with PayPal Buyer Protection.
  • Zilch says that as a regulated credit product, you’ll benefit from the same level of protections you’d get with more traditional types of credit if something goes wrong - such as Visa’s chargeback policy for refunds and Section 75 if the purchase is over £100.

Can I use buy now, pay later in-store?

With some retailers, you may be able to use BNPL schemes in-store.

You’re normally required to have an existing agreement or account with the BNPL provider, and you’ll need to access a portal on the provider’s app to make the transaction.

You’ll then be asked to generate a barcode via the app to present at the till.

While not all BNPL providers offer an in-store option, most are looking to expand into physical stores - so you might start noticing it more frequently when out at the shops.

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What to do if you can’t pay your buy now, pay later debt

Here are our tips on what to do if you're struggling to pay back your BNPL payment plans.

1. Contact the buy now, pay later provider as soon as possible

You might be able to arrange an alternative repayment plan, or 'snooze' your repayments to kick in at a later date.

Here's what some of the main BNPL providers offer to customers concerned about repayments:

  • Clearpay allows customers to move payments to a future date or add a breathing space to hold payments for a period of time. You can contact its customer service team to do so or move payments via the app or your online account.
  • Klarna lets you pause repayments for 10 days (interest and fee-free) via the app. But it's also worth reaching out to Klarna directly to put an alternative repayment plan together if you're concerned about meeting your payments.
  • PayPal will offer support such as amending repayment dates, depending on your circumstances.
  • Zilch lets 'Pay over 6 weeks' customers use a snooze feature to delay an instalment by four days (although some eligible customers can snooze for eight days). 'Pay over 3 months' customers can snooze payments for eight days. You can only snooze a payment once per purchase – and you can’t snooze your first payment. If a customer does fall behind on repayments, Zilch will stop any further borrowing. It says it will also contact the customer to see how it can help and offer the option of a personalised payment plan.

2. Draw up a budget

This can help you get a clear picture of exactly how much money you can afford to pay back every month. Having an idea of your financial situation is also useful if you're looking to propose an alternative repayment plan with your BNPL provider.

3. Don't overextend other borrowing

Think carefully about whether you'll be able to meet current BNPL repayments before applying for credit from other providers, or before taking out additional BNPL plans.

Debt can quickly spiral, so it's best to reach out to your BNPL provider to explain your situation before exploring other credit options.

4. Contact debt charities for support

There are a number of debt charities you can contact if you're struggling with your finances, including StepChange, MoneyHelper, Citizens Advice and National Debtline.

It's important to reach out for support - from your credit provider, debt charities or family and friends - if you're worried about debt.

key information

BNPL regulation coming into force in 2026

Most BNPL schemes aren’t currently regulated by the Financial Conduct Authority (FCA).

This means BNPL users have fewer protections if something goes wrong and BNPL providers don’t have to follow the same rules as other credit providers.

Plans to regulate BNPL schemes were first announced in 2021, following a number of Which? investigations that exposed consumer harm in the sector.

Following a consultation, the government has announced that regulation will come into force in 2026, bringing BNPL products in line with other types of credit.

Under the new rules:

  • Shoppers will be able to make Section 75 claims. This means the BNPL provider will be jointly liable with the retailer if anything goes wrong with purchases costing between £100 and £30,000.
  • You'll be able to escalate complaints to the FOS if you run into issues with a BNPL provider or purchase.
  • BNPL providers will have to carry out upfront affordability checks to ensure shoppers can manage the debt they're taking on.
  • 'Pay later' firms will have to follow consistent standards so shoppers know what they're signing up to, whether they can afford the purchase and how to get help if needed.
  • BNPL shoppers will also have 'fairer and faster' access to refunds.

Find out more: the long road to ‘buy now, pay later’ regulation