Key Stage: KS5
Year group: Year 12 / Year 13
Age range: 16–18
Duration: 50 minutes
Subject: PSHE / Economics / Citizenship
Cost: Free

Learning aim

Students can explain UK auto-enrolment, calculate the long-term cost of opting out, define salary sacrifice, and articulate why early pension contributions compound dramatically over a 47-year working life.

CURRICULUM National Curriculum links

PSHE Association KS5 H30: long-term financial planning, including pensions
Citizenship KS5: the State Pension and private pension framework
Economics A-Level: intertemporal choice, time value of money, compound growth
Maths A-Level: compound interest calculations

RESOURCES What you'll need

UK auto-enrolment rules summary (qualifying earnings, percentages)
Compound interest calculator (any spreadsheet)
5-year vs 47-year projection worksheet
Sample workplace pension scheme leaflet
UK Tax Drag's pension vs LISA comparison for teacher prep

LESSON Lesson structure (50 minutes)

Opening
HOOK

"You're 18, starting your first £22,000 job. You get auto-enrolled into a workplace pension. The deduction looks like 5% — about £92/month from your gross pay. You could opt out and keep that money. Should you?" Take 3 student responses, then say: "We'll calculate the actual cost of opting out today."

Direct teach
TEACH

Explain auto-enrolment: from age 22 with earnings >£10,000, employers must enrol you. Minimum 8% combined: typically 5% employee + 3% employer. The 3% employer match is FREE MONEY — opting out means losing it forever. Plus tax relief: a basic-rate earner's £92 employee contribution costs only ~£74 net. So for £74 net, you get ~£147 into your pension pot (the £92 including relief, plus £55 from the employer).

Pupils apply
GUIDED

Calculate: £92/month employee (the £18 basic-rate tax relief is already inside that figure — net cost ~£74) + £55 employer = £147/month into pension. Compound at 6% real return for 47 years (age 18 to 65). Result: ~£430,000. Compare: same £92/month into a regular savings account at 0% real return = £52,000. The compound + employer match difference: ~£378,000 over a working life. THIS is the cost of opting out.

Stretch / depth
CHALLENGE

Salary sacrifice: instead of the employee paying 5% from net pay, the employer reduces gross pay by 5% and pays that amount directly into the pension. Saves National Insurance (8% employee + 15% employer) on the sacrificed portion. For £92/month: NI savings ~£21/month between employee and employer. Some schemes pass the employer's saving back to the employee. So salary sacrifice can save BOTH tax and NI vs the default relief-at-source method.

Close
PLENARY

Students discuss in pairs: "What would I tell a friend who's thinking of opting out?" Take three answers. Land on: don't opt out — the employer match alone is worth more than the take-home pay you'd gain.

DIFFERENTIATION Adapting for all learners

Support (working below ARE)

Calculate only the employer match impact: £55/month × 12 × 47 years = £31,020 of FREE money missed by opting out, before any growth. Don't require compound interest calculation.

Stretch (working above ARE)

Students research the difference between Defined Benefit (DB) and Defined Contribution (DC) pension schemes. They calculate the present value of a £20,000/year DB pension at age 65 for someone retiring with 40 years of service.

SEND SEND adaptations

For pupils with autism: provide a clear visual timeline showing each contribution year. Use concrete examples ("£92 from each of 12 paychecks per year") rather than abstract percentages first.

EAL EAL support

Vocabulary: "auto-enrolment", "qualifying earnings", "employer match", "tax relief", "salary sacrifice", "Defined Contribution", "compound". Provide a glossary card. Sentence frames: "I should not opt out because ___."

ASSESSMENT Assessment criteria

Pupils can: (1) define auto-enrolment; (2) calculate the immediate cost of opting out (lost employer match + lost tax relief); (3) define salary sacrifice; (4) articulate why a pension started at 18 outperforms one started at 30 by a large multiple.

HOME Homework pack

Three activities consolidating pension decision-making at age 18. ~35 minutes.

Compound calculation

What pupils do: Calculate the pension pot at age 65 for a £25,000-salary worker who contributes 5% from age 18 (with 3% employer match) at 6% annual real growth. Compare to the same worker starting at age 28.

Expected output: 2 calculations with reasoning.

Marking guidance: 6 marks — 3 per calculation. Compound formula reference allowed.

Opt-out cost

What pupils do: In 250 words, explain to a friend why opting out of auto-enrolment is almost always a financial mistake.

Expected output: 250-word persuasive explanation.

Marking guidance: 6 marks — 2 for accuracy, 2 for clarity, 2 for persuasiveness.

Salary sacrifice

What pupils do: Define salary sacrifice in your own words and explain how it differs from "relief at source". Why does HMRC allow it?

Expected output: Short structured response.

Marking guidance: 4 marks — 2 for definition, 2 for difference vs RAS.

SAFEGUARDING Classroom safeguarding

Note for teachers: Do not ask pupils about their own family's tax band, salary, or income. Frame all examples through fictional salaries. Be aware some pupils may be unsure of family financial circumstances — focus on the public-spending side of the lesson, not personal income.

ANSWERS Answer key & differentiation

Answer guide

Guided check: £92 employee (which already includes the £18 basic-rate tax relief — net cost ~£74) + £55 employer = £147/month = £1,764/year. At 6% for 47 years the year-end-contribution formula gives £1,764 × 241.1 ≈ £425,000, matching the lesson's ~£430,000. Watch for pupils double-counting the relief as an extra £18 on top of the £92.
Homework "Compound calculation": £25,000 salary → 5% employee £1,250 + 3% employer £750 = £2,000/year. From age 18 (47 years at 6%): £2,000 × 241.1 ≈ £482,000. From age 28 (37 years): £2,000 × 127.3 ≈ £255,000. The ten-year delay costs roughly £227,000 — nearly half the pot — even though only £20,000 less goes in.
"Opt-out cost" full marks mention: opting out keeps ~£74/month net but forfeits the £55 employer match and the relief built into the gross contribution — £147/month of pension value; over a full career that is the six-figure pot above. Precision point (matches the end-of-unit quiz): the legal auto-enrolment duty starts at 22 with earnings over £10,000, but 16–21-year-olds can opt in and get the employer contribution — and the 2023 Extension Act lets government lower the age to 18.
"Salary sacrifice": employer reduces gross pay and pays the amount in directly, so the contribution escapes income tax AND National Insurance (8% employee, 15% employer — ~£21/month combined on £92); relief at source only reclaims income tax. HMRC allows it because pension saving is policy-favoured, but pay cannot be sacrificed below the minimum wage.

Support (scaffold)

The employer-match-only sum is deliberately growth-free: £55 × 12 × 47 = £31,020 of free money — one multiplication chain, no compounding needed.
Frame: "Opting out is asking for a pay cut — you hand back the 3% your employer must otherwise give you."
Use a 3-coin visual per £165: employee coin, employer coin, taxman coin — opting out throws away two of the three.

Stretch (challenge)

DB present value: a £20,000/year defined-benefit pension is equivalent to a pot of roughly £400,000–£500,000 (20–25× multiplier, consistent with ~4% annuity rates) — which is why DB schemes are described as gold-plated.
Ask: why does the state pension (£241.30/week in 2026/27, ~£12,500/year) not remove the need for the workplace pot? (It roughly covers essentials only, and the state pension age keeps rising.)
Have pupils test the salary-sacrifice NI arithmetic: 8% of £92 = £7.36 employee + 15% = £13.80 employer ≈ £21/month combined saving.

Understanding your first payslip (KS3 · Year 7 / Year 8)
National Insurance — what it is, who pays it (KS3 · Year 8)
Tax codes and emergency tax — decoding the letters and numbers (KS3 · Year 8 / Year 9)
All lesson plans (KS1 · KS2 · KS3 · KS4) →