£20,000 with £1,000 Pension Salary Sacrifice 2025-26
England & Wales · Pension salary sacrifice · 2025-26 tax year
Before vs after £1,000 salary sacrifice — 2025-26
| Item | Before sacrifice | After sacrifice | Saving |
|---|---|---|---|
| Gross / effective salary | £20,000 | £19,000 | −£1,000 |
| Income Tax | £1,486 | £1,286 | £200 |
| National Insurance | £594 | £514 | £80 |
| Net take-home / yr | £17,920 | £17,200 | £280 |
| Monthly take-home | £1,493 | £1,433 | £23 |
Pension salary sacrifice: what goes into your pot
| Your pension contribution (sacrifice) | £1,000/year | £83/month |
| Employer min contribution (3%) | £600/year | £50/month |
| Estimated total pension/year | £1,600/year | £133/month |
| Real cost to take-home | £720/year | £60/month |
Pension salary sacrifice is the most tax-efficient way to save for retirement. Your employer may also pass on their NI saving (£150/year) as an additional pension contribution — check your scheme rules.
£20,000 with £1,000 pension salary sacrifice — explained
On a £20,000 salary, sacrificing £1,000 for pension reduces your taxable earnings to £19,000. Your Income Tax drops from £1,486 to £1,286 (saving £200), and your National Insurance drops from £594 to £514 (saving £80).
The total annual saving is £280 (£23/month). The real cost to your take-home pay is only £720/year — because the tax and NI saving offsets a significant portion of the sacrifice.
Your employer also saves 15% employer NI on the sacrificed amount — £150/year. Many employers pass this saving on as an additional pension contribution or towards the cost of an EV lease.
Frequently asked questions
How much do I save with £1,000 pension salary sacrifice on £20,000?
On a £20,000 salary, sacrificing £1,000 for pension saves you £280 per year (£23/month) in combined Income Tax and National Insurance. Income Tax saving: £200. NI saving: £80.
Is salary sacrifice worth it on £20,000?
Yes — salary sacrifice is almost always beneficial if your employer offers it. On £20,000 with a £1,000 sacrifice, you save £280 in tax annually. Your take-home drops by only £720/year (not £1,000) because the tax saving offsets part of the sacrifice.
Does salary sacrifice affect my National Insurance on £20,000?
Yes — salary sacrifice reduces your National Insurance contributions because NI is calculated on your lower contractual salary. On £20,000 with £1,000 sacrifice, you save £80/year in NI. Your employer also saves 15% NI on the sacrificed amount (£150/year), which some employers pass back to employees.
What is my take-home after £1,000 pension sacrifice on £20,000?
After a £1,000 pension salary sacrifice on £20,000, your annual take-home is £17,200 (£1,433/month). Without the sacrifice, your take-home would be £17,920 (£1,493/month). The difference (£720/year) is the net cost to your take-home.
Does salary sacrifice affect my pension on £20,000?
For pension salary sacrifice: your pension pot grows by the full £1,000 sacrifice plus employer contributions. For EV or cycle sacrifice, your auto-enrolment pension is unaffected as it is based on qualifying earnings, not the sacrificed benefit. However, some mortgage lenders use post-sacrifice salary — confirm with your employer how they report income.
How does salary sacrifice affect State Pension on £20,000?
Salary sacrifice reduces your NI-able earnings. On £20,000 the effective salary after sacrifice is £19,000, which is well above the Lower Earnings Limit (£6,396 in 2025-26) — so your State Pension entitlement and NI record are unaffected.