UK tax estimates · Tax years 2025/26–2023/24 · Estimates only (not advice) · Tools include take‑home pay (PAYE), student loans, self‑employment (Class 2/4 NI), dividends and pensions.

Assumptions & sources
Tax Calculator 365

Tax Calculator 365

Pension contribution calculator (UK)

Compare salary sacrifice vs relief at source and estimate the take-home pay impact. Select a tax year and nation in the calculator.

Estimates only • No sign-up required • Tax years 2025/26–2023/24

Inputs

Compare estimated take-home impact of pension contributions. Supports salary sacrifice and relief-at-source (basic-rate relief).

Last updated: 2025-04-06

Enter before-tax salary.

Salary is required.

Enter the percentage of salary you want to contribute.

Results

Enter salary and contribution to see an estimate.

Notes

This tool provides an estimate. Pension tax relief depends on how your scheme is administered, your tax band, and whether you claim additional relief via Self Assessment.

Salary sacrifice impacts both Income Tax and employee National Insurance by reducing contractual pay. Relief at source typically adds basic-rate relief into your pension, and you may be able to claim additional relief if you pay higher or additional rate tax.