Last updated March 28, 2026
BNPL Glossary
Every Buy Now Pay Later term explained in plain English. No jargon, no fine print, just clear definitions so you know exactly what you are agreeing to.
APR (Annual Percentage Rate)
The yearly interest rate charged on a loan, expressed as a percentage. BNPL Pay in 4 plans typically have 0% APR. Monthly financing plans can carry APR from 0% to 36%. APR helps you compare the true cost of borrowing across different products.
Autopay
A feature that automatically deducts your scheduled payment from your linked bank account, debit card, or credit card on the due date. Most BNPL providers use autopay by default. Some (like Afterpay) let you disable it; others (like PayPal Pay in 4) do not.
BNPL (Buy Now Pay Later)
A type of short-term financing that lets you split a purchase into smaller installments paid over time, typically with no interest for short-term plans. Major providers include Afterpay, Klarna, Affirm, Sezzle, Zip, and PayPal.
Collections
When a BNPL provider transfers your unpaid debt to a third-party collection agency. This typically happens after 60 to 90 days of non-payment. A collections account appears on your credit report and can significantly damage your credit score for up to seven years.
Credit Bureau
An agency that collects and maintains information about consumers’ credit activity. The three major US credit bureaus are Experian, Equifax, and TransUnion. Some BNPL providers report payment activity to these bureaus; many do not.
Credit Check (Hard Inquiry)
A formal review of your credit report by a lender that can temporarily lower your credit score by a few points. Hard checks are visible to other lenders. Most BNPL Pay in 4 plans do not require a hard check. Longer-term financing plans from Affirm, Klarna, or Sezzle may trigger one.
Credit Check (Soft Inquiry)
A preliminary review of your credit that does not affect your credit score and is not visible to other lenders. All major BNPL providers use soft checks for their standard Pay in 4 products.
Credit Reporting
The process of a lender sharing your payment activity with credit bureaus. Affirm reports all loans to Experian and TransUnion. Sezzle offers opt-in reporting through Sezzle Up. Klarna reports financing products. Afterpay and PayPal do not report Pay in 4 activity in the US.
Credit Score
A numerical score (typically 300 to 850) that represents your creditworthiness based on your credit history. FICO and VantageScore are the most common models. BNPL activity may or may not affect your score depending on the provider and whether they report to credit bureaus.
Down Payment
The initial payment required at checkout when you use a BNPL service. For Pay in 4, this is typically 25% of the purchase price. Some providers may require a higher down payment for new users or larger purchases.
Failed Payment Fee
A fee charged when your payment method is declined due to insufficient funds, an expired card, or incorrect account details. Sezzle charges up to $10 (waived if paid within 48 hours). Most other BNPL providers do not charge this fee separately from late fees.
FICO Score
The most widely used credit scoring model in the US, developed by the Fair Isaac Corporation. FICO has announced it will begin incorporating BNPL data into credit scores, though implementation is still in progress as of 2026.
Financing
Longer-term monthly payment plans offered by BNPL providers, typically 3 to 60 months. Unlike Pay in 4, financing usually carries interest (0% to 36% APR) and may involve a hard credit check. Offered by Affirm, Klarna, Afterpay (Pay Monthly), Sezzle, and PayPal (Pay Monthly).
Grace Period
The window of time after a missed payment before a late fee is charged. Afterpay typically offers 10 days. Klarna offers a retry period of about 10 days in the US. Sezzle offers 48 hours for failed payment fee waiver. Affirm and PayPal charge no late fees regardless.
Installment
One of the individual payments in a BNPL plan. For Pay in 4, there are four installments. Each installment is typically an equal portion of the total purchase price (plus any fees or origination charges, depending on the provider).
Late Fee
A fee charged when you miss a scheduled payment. Afterpay: up to $8 per installment. Klarna: up to $7. Sezzle: up to $16.95. Zip: up to $7. Affirm: $0 (never charges late fees). PayPal Pay in 4: $0 (never charges late fees). All providers cap total late fees at 25% of the order value.
Merchant
A store or retailer that accepts a BNPL service as a payment option. The number of partner merchants varies: Klarna has 575,000+, Affirm 478,000+, Afterpay 100,000+, Sezzle 47,000+. PayPal Pay in 4 works anywhere PayPal is accepted (millions of merchants).
One-Time Card / Virtual Card
A temporary, single-use card number generated by a BNPL app that can be used at online or in-store checkout like a regular credit card. Offered by Klarna, Affirm, Sezzle, and Zip to let you use BNPL at stores that do not officially partner with the provider.
Origination Fee
A fee charged at the time a loan is issued. Zip is the only major BNPL provider that charges an origination fee on Pay in 4 purchases, ranging from $4 to $7.50 (Pay in 4) or $8 to $60 (Pay in 8). Other providers do not charge this fee.
Pay in 2
A BNPL option that splits a purchase into two equal payments: 50% at checkout and 50% two weeks later. Offered by Sezzle and Zip (launched February 2026). Interest-free.
Pay in 4
The standard BNPL product. Splits a purchase into four equal, interest-free payments over six weeks. The first payment (25%) is due at checkout, and the remaining three are charged every two weeks. Offered by all major BNPL providers.
Pay in 8
A BNPL option that splits a purchase into eight biweekly payments over fourteen weeks. Currently offered by Zip for larger purchases. Comes with a higher origination fee than Pay in 4.
Pay in 30
A BNPL option that gives you 30 days to pay for a purchase in full with no interest. Offered by Klarna. Useful for "try before you buy" shopping — order multiple items, return what you do not want, and only pay for what you keep.
Pay Monthly
Longer-term BNPL financing with monthly payments, typically 3 to 60 months. Usually carries interest. Offered by Affirm, Klarna, Afterpay, PayPal, and Sezzle. May require a credit check.
Payment Rescheduling
The ability to push a payment due date out. Afterpay: 1 free reschedule per order. Klarna: 1 free extension per order. Sezzle: 1 free, then $5 each. Zip: 1 free per month, then $2 each. Affirm and PayPal Pay in 4 do not offer rescheduling.
Purchase Power / Spending Power
An estimate of how much you can spend with a BNPL service. This is not a fixed credit limit — it changes based on your payment history, account age, and other factors. Each purchase is evaluated individually, and approval is not guaranteed even if your spending power shows a sufficient amount.
Sezzle Up
Sezzle’s opt-in credit building program that reports your payment history to Experian, Equifax, and TransUnion — all three major credit bureaus. On-time payments are reported as current. Late payments (30+ days overdue) are reported as delinquent. You can enroll and unenroll anytime.
Service Fee
A fee charged on certain BNPL transactions, particularly when using virtual cards at non-partner stores. Sezzle charges $0 to $7.49. Klarna may charge a service fee on one-time cards. Afterpay may charge a finance fee on certain non-partnered purchases. Affirm and PayPal do not charge service fees.
Spend Cap
A self-imposed spending limit you can set within a BNPL app to control your spending. Afterpay offers a Spend Cap feature that lets you voluntarily set your limit lower than the maximum allowed. Minimum cap is $100.
Provider Guides
For detailed information on each BNPL provider, check out our complete guides:
Disclaimer: Definitions are for general informational purposes. BNPL providers frequently update their terms. Always check directly with your provider for the most current information.
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