Salary sacrifice into a pension

Why it beats a normal contribution

A normal pension contribution saves you income tax. Salary sacrifice saves you income tax and National Insurance, because the money never counts as your salary in the first place.

If you are weighing a contribution against overpaying the mortgage, our overpay or pension calculator compares the two with your own figures, including the National Insurance saving.

Your employer also saves employer National Insurance on the amount sacrificed. Many employers pass some or all of that saving into your pension too, which is free money and worth asking about, because plenty of schemes do it only if you ask.

So for the same reduction in take-home pay, more ends up in your pension. That is the whole mechanism.

Where it is worth most

• Income between £100,000 and roughly £125,000. The personal allowance tapers away in this band, producing an effective marginal rate far above the headline higher rate. Sacrificing salary back below £100,000 is one of the most effective things available to a UK employee.
• Where child benefit is being clawed back. Reducing adjusted net income can restore some or all of it.
• Just above a tax band threshold, where sacrificing the excess is unusually efficient.
• Bonuses. Sacrificing a bonus before you receive it is often the single largest opportunity in a year, but it has to be arranged before entitlement arises. Afterwards is too late.

What to watch

• It reduces your stated salary. That can affect mortgage borrowing, though many lenders now handle it sensibly. Ask before you arrange a large sacrifice if you are about to apply for a mortgage.
• Salary-linked benefits. Death in service cover, income protection, redundancy pay and sick pay may be calculated on reduced salary unless your employer has based them on notional pre-sacrifice pay. Check which.
• Statutory payments. Statutory maternity pay and similar are based on actual earnings, so a sacrifice in the relevant reference period can reduce them.
• The lower earnings floor. You cannot sacrifice below the National Minimum Wage, and reducing earnings too far can affect state pension qualifying years and other entitlements.
• The annual allowance. Employer contributions count towards it, and for higher earners the tapered annual allowance can reduce the limit considerably. Exceeding it produces a tax charge.
• It is generally not reversible at will. Salary sacrifice is a contractual change. Employers usually allow changes only at set points or on defined life events.

Getting the amount right

The temptation is to sacrifice as much as possible. The better approach is to identify the specific threshold you are trying to get below, if any, and to check the annual allowance position first.

It also has to be affordable. Money in a pension is not accessible until at least the normal minimum pension age, so sacrificing so much that you have no accessible savings is a poor trade however good the tax relief.

If you are a company director

Employer pension contributions from your own company are usually more efficient than salary sacrifice arrangements, and the analysis sits alongside how you take profit generally. That is covered on our business owners page.

This page is general information about the rules and does not constitute advice.

Last reviewed: 17 September 2026. Next review: Annually.