Salary sacrifice on GBP 25,000

## Scenario

An employee earns £25,000 and considers sacrificing £2,000 a year into their workplace pension via salary sacrifice. That reduces their contractual gross pay to £23,000. Because salary sacrifice cuts the pay figure before tax and National Insurance are applied, both deductions fall — meaning the real cost of the £2,000 pension contribution is less than £2,000 out of pocket.

All figures use 2025-26 rates: personal allowance £12,570, basic-rate income tax 20%, employee NI 8% on earnings between £12,570 and £50,270.

Before and after comparison

| | Before sacrifice | After sacrifice | |---|---|---| | Gross pay | £25,000 | £23,000 | | Taxable pay (gross minus £12,570) | £12,430 | £10,430 | | Income tax (20%) | £2,486 | £2,086 | | Employee NI (8% on earnings above £12,570) | £994 | £834 | | Take-home pay | £21,520 | £20,080 | | Pension contribution | £0 | £2,000 |

What the sacrifice actually costs

| | Amount | |---|---| | Take-home reduction | £1,440 | | Pension gained | £2,000 | | Tax saved | £400 | | NI saved | £160 | | Total relief | £560 | | Effective discount on pension contribution | 28% |

For every £1 sacrificed into pension, take-home falls by only 72p. The remaining 28p is returned through tax and NI savings.

Detailed deduction working

Before sacrifice: - Taxable pay: £25,000 − £12,570 = £12,430 - Income tax: £12,430 × 20% = £2,486 - NI: (£25,000 − £12,570) × 8% = £12,430 × 8% = £994 - Take-home: £25,000 − £2,486 − £994 = £21,520

After sacrifice (gross £23,000): - Taxable pay: £23,000 − £12,570 = £10,430 - Income tax: £10,430 × 20% = £2,086 - NI: (£23,000 − £12,570) × 8% = £10,430 × 8% = £834 - Take-home: £23,000 − £2,086 − £834 = £20,080

Student loan interaction

At £25,000, this salary sits below the Plan 2 repayment threshold of £27,295. There are no student loan deductions before or after the sacrifice, so the loan interaction does not apply here.

If you hold a Plan 1 loan (threshold £24,990 for 2025-26), the sacrifice from £25,000 to £23,000 would push you below that threshold, removing around £9 of annual repayments — a modest but real extra saving.

What to notice

• The take-home drop (£1,440) is £560 less than the pension contribution (£2,000). That gap is pure relief.
• At £25,000 the full sacrifice sits within the basic-rate band, so the discount is a flat 28% (20% tax + 8% NI).
• Monthly take-home falls by £120 (£1,440 ÷ 12). For many households at this salary level that is meaningful, so checking monthly cash flow before committing is worthwhile.
• If your employer also contributes to the pension, the pension pot grows faster than the £2,000 figure alone — check your employer matching rules.
• The £2,000 sacrifice reduces pensionable pay used to calculate employer contributions in some schemes. Verify whether this applies to your workplace scheme.

Best next step

Use the salary sacrifice calculator to test your own contribution amount. Then check the take-home pay calculator to confirm the resulting monthly figure fits your budget. For the broader mechanics, read How salary sacrifice changes net pay and pension value.