Credit cards — how they work and the minimum payment trap
A classroom-ready 60 minutes lesson plan with starter, main, plenary, differentiation, SEND adaptations, EAL support and assessment criteria. Free to use, no login.
Key Stage
KS4
Year group
Year 11
Age range
15–16
Duration
60 minutes
Subject
Maths / PSHE / Citizenship
Cost
Free
Learning aim
Pupils can explain how credit cards work, calculate the total cost of paying only the minimum each month, and recognise the "minimum payment trap" that keeps people in debt for decades.
CURRICULUM National Curriculum links
PSHE Association KS4 L19: about credit and the consequences of borrowing money
PSHE Association KS4 L20: about debt and how to manage debt risk
Citizenship KS4: financial products, services, and consumer protections
Maths KS4: compound interest and percentage applications
RESOURCES What you'll need
Sample credit card statement (anonymised)
Minimum payment trap calculator/worksheet
APR comparison chart (typical UK cards: 19% best, 35% worst)
Section 75 fact card
LESSON Lesson structure (60 minutes)
Opening HOOK
"If you spent £1,000 on a credit card and only paid the minimum each month, how long would it take to clear the debt?" Take 3-4 guesses — most will say 2-5 years. Reveal: depending on APR, it can be 15-25 YEARS. And you'll pay £2,500-£3,500 in total. That's the "minimum payment trap" — and it's how credit card companies make their money.
Direct teach TEACH
How credit cards work: (1) You're given a credit limit (e.g. £1,000) — the maximum you can borrow at any time. (2) Each month you get a statement showing what you owe. (3) If you pay the full balance by the due date: no interest, free credit. (4) If you pay only the minimum payment (usually 1-3% of balance): interest is charged on the rest. (5) APR = Annual Percentage Rate, typical UK card: 19-35%. Worked example: £1,000 balance at 25% APR, paying only £25/month minimum = 22 years to clear, £2,500 total paid. Show the dramatic chart.
Pupils apply GUIDED
Pupils work through three calculator scenarios on the worksheet: Card 1: £500 balance, 19% APR, £20/month minimum — how long to clear, total cost? Card 2: £500 balance, 35% APR, £20/month minimum — same question. Card 3: £500 balance, 25% APR, £100/month (paying MORE than minimum) — same question. Compare results. Build the killer insight: paying MORE than the minimum dramatically reduces both time AND total cost.
Stretch / depth CHALLENGE
"Your friend says credit cards are 'free money' because the bill comes later." Is this right? Pupils discuss. Build the nuance: credit cards CAN be useful when used correctly — interest-free if paid in full each month, helps build credit history, and gives Section 75 consumer protection on purchases over £100. The trap is when balances build and minimum payments become routine. Show Section 75: under UK law, if you use a credit card for a purchase between £100 and £30,000 and the seller fails (faulty goods, company goes bust), the credit card company is jointly liable for a refund.
Close PLENARY
Each pupil writes: "A credit card is safe to use if I ___" and "The minimum payment trap is when ___." Share three. Final question: "Why might paying the minimum each month feel 'sensible' even though it's expensive?" (It feels manageable in the moment. The cost is hidden in the long term.)
DIFFERENTIATION Adapting for all learners
Support (working below ARE)
Use simple round-number scenarios (£100 balance, 20% APR, £5/month minimum). Provide pre-printed calculation tables.
Stretch (working above ARE)
Compare a credit card at 25% APR vs a personal loan at 8% for the same borrowed amount. Which is cheaper to clear in 3 years? Why might someone still use the credit card despite the higher rate?
SEND SEND adaptations
For pupils with dyscalculia: use the calculator worksheet with pre-filled formulas. For pupils with autism: provide a clear "rules of safe credit card use" card (always pay in full, never miss a payment, etc.). For pupils with anxiety: emphasise the lesson is about prevention, not fear — credit cards used well are a useful tool.
EAL EAL support
Vocabulary: "credit card", "balance", "APR", "minimum payment", "interest", "credit limit", "Section 75", "consumer protection". Sentence frame: "If I pay only the minimum, my £___ balance takes ___ years to clear and costs £___ in total."
ASSESSMENT Assessment criteria
Pupils can: (1) explain how credit cards work; (2) define APR; (3) calculate the total cost of paying minimum on a £500 balance at 25% over 5 years; (4) explain the minimum payment trap; (5) describe one consumer benefit (Section 75) of using a credit card.
HOME Homework
Use a UK price comparison site (Moneyfacts or MoneySavingExpert) to look up the APR of TWO different credit cards. Bring back: card name, APR, minimum payment percentage. Don't sign up to anything.
SAFEGUARDING Classroom safeguarding
Note for teachers: Some pupils may have family members in debt or credit-card trouble. Frame discussion through fictional scenarios. If a pupil discloses worry about family finance or debt, take it seriously and follow safeguarding procedure outside the lesson. Reference StepChange (free debt advice charity) on the worksheet.