Salary Sacrifice: the Higher Earner's Most Underused Move

Most tax planning is a grind of allowances and small print. Salary sacrifice is the rare move that is both simple and genuinely powerful, and yet it sits ignored on the benefits portal of half the country's employers. The idea is almost too plain to trust: you agree to give up a slice of your gross salary, and your employer pays it straight into your pension instead. Because the money never counts as your income, it is never taxed as income. For a higher earner, that single arrangement can be worth thousands a year.

What salary sacrifice actually is

Normally your pension contribution comes out of pay you have already been taxed and charged National Insurance on, and the pension provider claims some of the tax back for you. Salary sacrifice flips the order. You formally reduce your contractual salary, and your employer diverts that amount into your pension as an employer contribution. Your take-home pay falls by less than the amount sacrificed, because HMRC and the National Insurance system never get their hands on it in the first place.

The double saving hiding in plain sight

Here is why it beats an ordinary pension payment. When you sacrifice salary you save both income tax and employee National Insurance on that money. A higher-rate taxpayer pays 40% income tax and 2% National Insurance on income in that band, so £1,000 of gross salary is worth only around £580 in the hand. Sacrifice it into a pension and the full £1,000 goes to work for your future.

There is a bonus on top. Employers pay National Insurance on your wages too, at 15% since April 2025. When you sacrifice salary, the employer saves that as well, and many good schemes add some or all of that saving to your pension. Free money on free money.

"Salary sacrifice is the only move in UK tax where you and your employer both save, and you can arrange for their saving to land in your pension too."

Where it becomes a superpower

The real magic is what sacrifice does to your taxable income, because several of the nastiest cliffs in the tax system are triggered by that single number.

• The 60% tax trap. Between £100,000 and £125,140 your personal allowance is withdrawn, creating an effective marginal rate of 60%. Sacrifice enough to bring taxable income back to £100,000 and every pound rescued is worth 60p, paid into your own pension rather than lost.
• The child benefit charge. The High Income Child Benefit Charge now bites between £60,000 and £80,000 of adjusted net income. Sacrifice can pull you under £60,000 and keep the family's full child benefit.
• Losing your personal allowance or a band. Even nudging just under the higher-rate threshold changes the tax on your next slice of income. Sacrifice lets you steer your taxable income deliberately rather than by accident.

The catches worth knowing

It is not a free lunch in every direction. A lower official salary can reduce the amount a mortgage lender will offer, though many now accept sacrificed pension amounts if you ask. It can affect earnings-linked benefits such as statutory maternity pay or death-in-service cover, so check how yours are calculated. You cannot sacrifice below the National Minimum Wage. And pension contributions are capped: the annual allowance is £60,000 for most people in 2026/27, including employer contributions, with tapering for very high earners. Finally, the money is locked away until pension age, so only sacrifice what you are happy not to touch until then.

What to do this week

Ask HR two questions: does the company offer pension salary sacrifice, and does it pass on any of the employer National Insurance saving. If the answer to the first is yes, model a sacrifice that lands you just under whichever cliff applies to you, the 60% band, the £60,000 child benefit line, or simply the higher-rate threshold. It is the closest thing to a legal pay rise most higher earners will ever find.

Compound provides general information, not financial advice. Tax rules depend on your circumstances and can change.