Is buy now pay later really interest-free?

There's no interest, but it's rarely free. Providers charge account-keeping fees and, crucially, late fees if you miss an instalment. On a small purchase a fixed late fee can be a huge effective percentage — often working out more expensive than a credit card. This calculator shows the real cost in dollars and as an effective annual rate.

How much are BNPL late fees?

Late fees are typically a fixed dollar amount per missed instalment (commonly around $10), sometimes capped as a percentage of the purchase. Because they're fixed, they're proportionally brutal on small buys — a $10 late fee on a $100 purchase is effectively 10% for being a few days late.

Does BNPL affect my credit score or home loan?

It can. From mid-2026 BNPL is regulated as credit in Australia, so providers run affordability checks and your use can appear on your credit file. Lenders increasingly count BNPL commitments when assessing a home loan, and multiple active accounts can be a red flag. Keep them minimal if you're planning to borrow.

BNPL True Cost Calculator

Buy-now-pay-later is sold as interest-free, but account and late fees add up fast. Work out what an Afterpay, Zip or Klarna purchase really costs you — in dollars and as an effective rate.

Last verified: 5 May 2026

What does 'interest-free' BNPL really cost?

No interest, but account fees and late fees are the catch — and a fixed late fee on a small purchase is a brutal effective rate, often worse than a credit card. Source: ASIC MoneySmart.

Worked example. A $400 purchase with one $20 late fee over 2 months = $20 in fees — an effective cost of about 30% a year. Miss more instalments and it climbs fast.

General information and estimates only — not financial, tax, or legal advice. Always verify with a licensed adviser or the ATO.

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BNPL True Cost Calculator

What does 'interest-free' BNPL really cost?

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