Fintech · Beginner

Buy now, pay later (BNPL) explained

Splitting a purchase into four interest-free payments feels like a payment method. Legally and financially, it is a loan, and stacking several at once is where trouble starts.

By Protocol Insights editorial teamChecked against 4 sources5 min read

Plastic shopping bags piled on the floor after a shopping trip — Photo: “Shopping Bags” by noricum, CC BY-SA 2.0, via flickr.com. Converted to black and white.

On this page

How does buy now, pay later work?
How big has BNPL become?
How does BNPL compare with a credit card?
What risks does the CFPB see in BNPL?
How is BNPL regulated?
What mistakes do people make with buy now, pay later?
Questions readers ask
Sources

The short version

Buy now, pay later (BNPL) is a short-term loan that splits a purchase into installments, typically four payments over six weeks with no interest.
The CFPB counted 335.8 million BNPL loans worth $45.2 billion in 2023 from six large lenders.
In 2023, 4.1% of those BNPL loans were charged a late fee, according to the CFPB.
About 63% of BNPL borrowers had several loans open at the same time at some point in 2022, the CFPB found.
In the UK, BNPL became regulated on 15 July 2026, bringing affordability checks and access to the Financial Ombudsman Service.

Buy now, pay later is a checkout loan that splits a purchase into equal installments. The common version takes the first payment at checkout and the rest every two weeks, with no interest if you pay on time. Late payments can bring fees, and several loans at once strain budgets.

How does buy now, pay later work?

At an online or in-store checkout you choose a BNPL option instead of paying in full. A BNPL lender pays the merchant and you repay the lender in installments. The Consumer Financial Protection Bureau (CFPB) describes the classic "pay-in-four" product: a purchase, often between $50 and $1,000, is split into four equal payments, with one due at checkout and the other three due at two-week intervals over six weeks. No interest is charged on that product if you pay on schedule.

The lending decision is made at the checkout in moments. In 2021, the CFPB found, 73% of applicants to the lenders it surveyed were approved.

Figure — The common pay-in-four schedule described by the CFPB

How big has BNPL become?

BNPL has grown quickly. In its 2022 report the CFPB found that the five lenders it surveyed made 180 million loans worth $24.2 billion in 2021, up 970% by number from 2019. Its December 2025 data spotlight, covering six lenders, counted 335.8 million loans worth $45.2 billion in 2023, a 23% rise in loan numbers from 2022, taken out by 53.6 million consumers. The average loan was $135 after adjusting for inflation.

The CFPB has also looked at who borrows. In January 2025 the CFPB reported that 21.2% of consumers with a credit record used BNPL in 2022, and that nearly two-thirds of BNPL loans went to borrowers with lower credit scores.

A shopper pulling a wheeled shopping trolley bag — Photo: “Retro Oilcloth Shopping Bag” by TinyApartmentCrafts, CC BY 2.0, via flickr.com. Converted to black and white.

How does BNPL compare with a credit card?

Feature	Pay-in-four BNPL	Credit card
Interest	None if paid on schedule (pay-in-four)	Charged if you carry a balance past the grace period
Repayment	Fixed installments, usually every two weeks	Flexible, with a minimum payment each month
Limit	Set per purchase	One revolving credit line
Main cost when things go wrong	Late fees; autopay pulling from your bank account	Interest and late fees
Billing disputes (US)	Depend on the lender's terms; check before buying	Fair Credit Billing Act process

A credit card is a single line of credit, so its total balance is visible on one statement. BNPL loans are separate, and the CFPB lists borrower overextension, including several loans at once, as a key risk. Card rights are covered in how card payments work; how interest rates are quoted is explained in APR vs APY.

What risks does the CFPB see in BNPL?

The CFPB's 2022 report grouped the risks into three kinds:

Discrete harms, such as products that require automatic payments from your bank account, which can leave your bank account short if a payment lands before payday.
Data harvesting: lenders using customer data to build models and marketing that increase the chance of more purchases.
Overextension: taking on more debt than you can comfortably repay, especially across several loans.

Stacking is common. In its January 2025 research the CFPB found about 63% of BNPL borrowers took out several loans at the same time at some point during 2022.

How is BNPL regulated?

Rules differ by country and have been changing fast.

United Kingdom. The Financial Conduct Authority began regulating BNPL, which it calls deferred payment credit, on 15 July 2026. Lenders must now check that you can afford to repay, give clear information about amounts, dates and late fees, and contact you if you miss a payment. You can complain to the Financial Ombudsman Service, and Section 75 of the Consumer Credit Act applies. Agreements taken out before 15 July 2026 stay unregulated.
United States. The CFPB has studied the market in reports in 2022 and 2025. Protections for disputes and refunds depend on the product and lender, so read the terms before you buy.

What mistakes do people make with buy now, pay later?

Treating each loan as small. Add up every installment due in the next six weeks, not just the newest one.
Linking autopay to an account that runs low. A failed payment can cost twice: a late fee and a bank fee.
Using BNPL for everyday essentials. Splitting groceries into installments can hide a budget gap rather than fix it.
Not knowing how returns work. Check the lender's return process before you buy, and keep paying installments until the lender confirms the refund.
Assuming "interest-free" means cost-free. Fees for late payments are still a cost, and the CFPB found 4.1% of loans in 2023 were charged one.

Questions readers ask

Does buy now, pay later affect my credit score?

It depends on the lender and the country. Some lenders check your credit or report payments; others do not. Check the lender's terms, and in the UK ask whether the agreement is regulated.

Is BNPL interest-free?

The common pay-in-four product charges no interest if you pay on time, according to the CFPB. Other BNPL products can work differently, and late fees can still apply.

What happens if I miss a BNPL payment?

You may be charged a late fee, and the lender may stop you taking new loans. In the UK, regulated lenders must contact you and explain what the missed payment means.

Is BNPL a good way to build credit?

Not necessarily. Whether payments are reported to credit bureaus varies by lender and country, so on-time payments may not show up at all, while the debt risk is real. Ask the lender how it reports.

Bottom line

Buy now, pay later is a short loan in a checkout button: helpful for spreading a planned purchase, risky when several plans overlap. Count every installment due in the coming weeks, keep autopay accounts funded, and check how the lender handles late payments and returns before you agree.

Sources

Consumer Financial Protection Bureau, Buy Now, Pay Later: Market Trends and Consumer Impacts (2022)Primary source
Consumer Financial Protection Bureau, The Buy Now, Pay Later Market: Data Spotlight (2025)Primary source
Consumer Financial Protection Bureau, CFPB Research Reveals Heavy Buy Now, Pay Later Use Among Borrowers with High Credit Balances and Multiple Pay-in-Four Loans (2025)Primary source
Financial Conduct Authority, Buy Now Pay Later (2026)Primary source

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