Employer Pension Contributions: How to Claim Corporation Tax Relief

Why Employer Pension Contributions Are One of the Most Efficient Business Expenses

When you pay a member of staff a salary increase, that extra pay attracts employer National Insurance at 15% (on earnings above the £5,000 secondary threshold in 2026/27) and the cost itself is subject to corporation tax — but only after you've already handed over the NI bill. Pension contributions work differently. They go straight into the employee's registered pension scheme, bypassing National Insurance entirely, and HMRC treats them as an allowable deduction against your company's trading profits.

The result is a double saving: you avoid the 15% employer NI charge and you reduce the profit on which you pay corporation tax. For profitable businesses paying the 25% main rate, every £10,000 of employer pension contributions costs just £7,500 net after tax relief. For companies in the small profits band paying 19%, the net cost is £8,100. Either way, directing remuneration through pension contributions rather than additional salary is arithmetically more efficient for the business.

This guide explains exactly how to claim the relief, which rules apply, and the key traps to avoid — especially for owner-managed businesses.

The Basic Rule: "Wholly and Exclusively" for Trade

Corporation tax legislation allows a deduction for expenses incurred "wholly and exclusively for the purposes of the trade." Employer pension contributions paid into a registered pension scheme meet this test in almost every normal commercial scenario, because:

• The contribution forms part of the employee's overall remuneration package.
• Providing pensions helps attract and retain staff, which is clearly a trading purpose.
• HMRC's own guidance confirms that contributions to registered occupational and personal pension schemes are deductible.

For most companies with arm's-length employees, you simply need to ensure contributions are actually paid (not merely accrued without payment) by the time you file your return, or within nine months of the accounting period end if paid after year-end but before the filing deadline — though the timing rules are explained in more detail below.

How Much Relief Do You Actually Get?

The saving depends on which corporation tax rate applies to your company.

Small profits rate (19%) — applies to companies with profits below £50,000 per year. A £5,000 employer pension contribution reduces taxable profit by £5,000, saving £950 in corporation tax. Net cost to the company: £4,050.

Main rate (25%) — applies to companies with profits above £250,000. The same £5,000 contribution saves £1,250 in corporation tax. Net cost: £3,750.

Marginal relief band — profits between £50,000 and £250,000 attract an effective marginal rate of up to 26.5% during the taper. Contributions that push profits down through the marginal band may save slightly more than the headline main rate suggests.

On top of the corporation tax saving, the company also avoids employer National Insurance at 15% on earnings above the £5,000 secondary threshold. If the alternative was paying an extra £5,000 salary, the NI cost alone would be £750. So for a main-rate company, the combined saving from choosing pension over salary is £2,000 on a £5,000 sum — or 40% of the gross amount.

Timing: When Must Contributions Be Paid?

HMRC's rules on timing are precise. A contribution is deductible in the accounting period in which it is paid, not when it is accrued in your accounts. There is one practical exception: contributions paid within nine months after the end of an accounting period may still be deductible in that period, provided your pension scheme rules allow backdating and certain conditions are met. In practice, most advisers recommend simply paying contributions before year-end to be certain.

If your company accrues a pension liability at 31 March but does not actually transfer the funds until six months later, the deduction falls in the later period. For companies trying to manage their tax bill across years, this distinction matters. Set up regular contribution payments — typically monthly via your payroll or direct to the pension provider — and the timing issue largely takes care of itself.

Owner-Directors: The Extra HMRC Scrutiny

For controlling shareholders and owner-directors, HMRC applies more scrutiny to pension contributions because the "wholly and exclusively" test requires the contribution to be commercially justifiable given the person's role and the overall remuneration package.

This does not mean owner-directors cannot receive large employer pension contributions. It means HMRC may challenge a situation where, say, a director takes a minimal salary, pays themselves modest dividends, but the company contributes £50,000 a year to their pension — particularly if that level of contribution would not be offered to an unconnected employee in an equivalent role.

HMRC's published guidance suggests looking at the "totality of remuneration." If total remuneration (salary + pension + benefits) is broadly in line with what a commercial employer would pay an arm's-length person doing the same job, the deduction will stand. Most owner-directors with properly structured arrangements have nothing to fear, but it is worth ensuring your pension contribution levels are defensible on commercial grounds and documented accordingly.

Auto-Enrolment Contributions and Corporation Tax

Under auto-enrolment rules, most employers must contribute a minimum of 3% of qualifying earnings into their employees' pension schemes. For 2026/27, qualifying earnings are banded between £6,240 and £50,270. These mandatory contributions are, of course, also fully deductible for corporation tax — auto-enrolment does not change the tax treatment.

Many employers choose to contribute above the 3% minimum as a recruitment tool, and all employer contributions above minimum are equally deductible, subject to the "wholly and exclusively" test. If you are comparing the cost of increasing employer contributions versus raising salaries for retention purposes, the pension route is almost always more efficient when you factor in the NI saving alongside the corporation tax relief.

Salary Sacrifice Pension Schemes

A salary sacrifice (or "salary exchange") arrangement takes the efficiency a step further. Under salary sacrifice, the employee agrees to reduce their contractual salary by an amount equal to the pension contribution, and the employer pays that amount directly into the pension instead. The contribution is then treated entirely as an employer contribution.

The advantages:

• The employee pays no income tax or employee NI on the sacrificed amount (employee NI is 8% up to £50,270, 2% above).
• The employer pays no employer NI (15%) on the sacrificed amount, saving an additional £150 for every £1,000 contributed.
• The employer still claims corporation tax relief on the full contribution.

Some employers share part of the employer NI saving with the employee by topping up the pension contribution. Even without sharing, employees typically receive a higher net pension contribution for the same gross employment cost compared with a standard pay-and-contribute model.

What You Need to Do in Practice

Claiming the relief is straightforward in most cases. You do not make a separate claim to HMRC. Instead, your accountant (or you, if filing your own return) simply includes employer pension contributions in the allowable expenses section of your Company Tax Return (CT600), reducing the figure for taxable profits accordingly.

Practical steps:

1. Ensure contributions are paid to a registered pension scheme. HMRC maintains a register of registered pension schemes. Auto-enrolment providers such as Nest, The People's Pension, and Aviva are registered; so are most occupational schemes. If in doubt, check the scheme's registration number on the HMRC registered pension schemes online service.

2. Pay contributions on time. Set up direct debit or standing order payments so contributions clear before your accounting year-end.

3. Keep records. Retain pension payment receipts, scheme statements, and payroll records showing the contribution amounts. HMRC can enquire into corporation tax returns up to four years after filing (or longer if fraud or negligence is involved).

4. Document owner-director contributions. If you are contributing large sums for a director, keep a brief board minute or written record explaining the commercial rationale — for example, benchmarking against market pay rates for a person in that role.

5. Review the annual allowance each year. Use a pension adviser or financial planner to confirm that contributions for each individual do not trigger an annual allowance charge.

Comparing Pension Contributions with Other Remuneration Options

To illustrate the efficiency, consider a profitable company (paying 25% corporation tax) deciding how to pay £10,000 more to a key employee earning above the £50,270 threshold.

Option A — Salary increase of £10,000:

• Employer NI at 15%: £1,500
• Total employer cost: £11,500
• Corporation tax relief on £11,500: £2,875
• Net employer cost: £8,625
• Employee receives: £10,000 less 40% income tax and 2% NI = £5,800

Option B — Employer pension contribution of £10,000:

• Employer NI: £0 (pension contributions are NI-exempt)
• Total employer cost: £10,000
• Corporation tax relief on £10,000: £2,500
• Net employer cost: £7,500
• Employee receives: £10,000 into pension (no immediate income tax)

The pension route saves £1,125 in employer costs and delivers a larger gross benefit to the employee. The employee does pay income tax on pension withdrawals in retirement, but typically at a lower rate, and 25% of the fund can usually be taken tax-free.

A Note on Contributions Paid After the Year-End

If your company misses the year-end payment deadline, all is not lost. A contribution paid after the accounting period end but before the corporation tax payment due date (nine months and one day after the period end for most companies) can sometimes be deducted in the earlier period under HMRC's "spreading" rules. However, the rules are complex and depend on the size of the contribution relative to previous years. Large one-off contributions — particularly those significantly larger than in prior years — may need to be spread across multiple accounting periods. Take professional advice before planning a large catch-up contribution late in the year.

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This article is for information only and does not constitute financial or tax advice. Tax rules may change. Consult a qualified adviser for your specific situation.