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Finance · Money admin

How loans work: credit cards and buy now, pay later

How loans work, in six short lessons: principal, interest and term, APR and comparison rates, credit cards and minimum payments, personal and car loans, buy now, pay later rules, and payday loans, hardship and help. Official debt help for Australia, the UK and the US in lessons 1 and 6.

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About this course

credit cards and buy now, pay later.

Starter · About 1 hour of learning · 6 lessons · 13 quick checks · 1 download

  • Who it's for

    Adults in Australia, the UK, the US and elsewhere who want to understand loans, credit cards and buy now, pay later before they borrow.

  • How it works

    6 guided lessons in your browser, with worked examples, exercises and a quick check after each lesson. Progress is saved in this browser only, and you can restart at any time. Lesson 1 is open to everyone, and you can take one whole course without an account. After that, a free account lets you continue past lesson 1.

  • Sources we rely on

    32 published sources, mostly regulators and official bodies, listed below so you can check the original guidance yourself.

By the end you can

  • Explain principal, interest and term, and how the term changes the total cost of a loan
  • Use APR or the comparison rate and total cost to compare two loan offers
  • Explain how credit card interest and minimum payments work, and plan a payment that clears a balance
  • Tell secured and unsecured loans apart and explain how buy now, pay later works and is regulated
  • Recognise payday loan costs and loan scams, ask for hardship help, and name the official debt help in your country

Downloads

  • Loan and card cost worksheet .xlsxCompare two loan offers on repayment and total cost including fees, see a full repayment schedule, test a balloon payment, and model a credit card payoff at different monthly payments.

Rules by country

Australia
Moneysmart: comparison rate includes interest and most fees; average card rate over 18%; BNPL providers must have complaints and hardship services; payday loan fee caps (20% establishment, 4% a month); No Interest Loans; lenders must consider hardship requests; National Debt Helpline 1800 007 007.
United Kingdom
APR and the pre-contract credit information (MoneyHelper); persistent debt rules after 18 months of mostly interest and charges; FCA regulation of Deferred Payment Credit (BNPL) from 15 July 2026 with affordability checks; loan fee fraud warnings; free debt advice through MoneyHelper and GOV.UK.
United States
CFPB: APR as a broader measure than the interest rate, credit card grace periods and cash advances, negotiating auto loans, BNPL late fees and credit reporting; FTC: payday loan costs ($15 per $100 is a 391% APR); credit counseling from reputable nonprofit agencies.

Learning time

About 1 hour of learning. May count towards your CPD or professional development; check your professional body's rules. Estimated from reading time, exercises, quick checks and downloads.

Sources

Check the originals.

Drafted with AI assistance and run through automated quality and source checks. How these courses are made. Spotted an error or out-of-date rule? Send a correction.

General information only, not financial advice. We don't recommend financial products.

Publisher

Who publishes this course.

Published by trainyourself.org, a trading name of Combine TRS Pty Ltd (ABN 42 112 983 678), Brisbane, Australia.

How it's made: drafted with AI assistance from published regulator, government and official money guidance, then run through automated quality checks against our course depth standard and automated source checks that match each rule to its official source, listed above. Read how these courses are made.

Last updated:

General information only, not financial, credit, tax or legal advice. Spotted an error or an out-of-date rule? Send us a correction.

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