Pension Contributions & Corporation Tax Relief

Pension Contributions & Corporation Tax Relief: How to Reduce Your Company's Tax Bill

Employer pension contributions are one of the most tax-efficient ways to extract value from your limited company. The company gets a corporation tax deduction, you don't pay income tax or National Insurance on the contribution, and the money grows tax-free inside the pension.

But the rules aren't as straightforward as "pay in as much as you like." There are annual limits, timing rules, and a key test that HMRC applies to determine whether the contribution is allowable.

Here's how it all works — and how to report it correctly on your CT600.

Why Pension Contributions Are So Tax-Efficient

Let's compare three ways of extracting £10,000 from your company (assuming you're a higher-rate taxpayer):

The pension contribution saves the company £2,500 in corporation tax and costs nothing in personal tax or NIC at the point of contribution. The money sits in your pension, growing tax-free, until you access it (usually from age 55, rising to 57 from 2028).

Even accounting for tax when you eventually draw the pension (25% is tax-free, the rest taxed as income), the overall effective rate is dramatically lower than salary or dividends.

The Rules: When Are Employer Pension Contributions Allowable?

The "wholly and exclusively" test

Like all business expenses, employer pension contributions must be made wholly and exclusively for the purposes of the trade. HMRC accepts that paying into an employee's pension is a normal business expense — it's part of their remuneration package.

For director-shareholders, HMRC may scrutinise very large contributions more closely, but the principle is the same: if the contribution is genuinely part of the director's remuneration for services to the company, it's allowable.

The "paid" basis

Pension contributions are deductible when actually paid, not when committed to. This is different from most business expenses, which are deductible on an accruals basis.

• Contribution paid on 15 March 2026 → deductible in the accounting period containing that date
• Contribution accrued on 31 March 2026 but paid on 5 April 2026 → deductible in the next period (the one containing 5 April)

This matters for year-end planning. If you want the deduction in this period, make sure the money leaves the company's bank account before your year-end.

Spreading of contributions

If the company makes a single large "one-off" contribution, HMRC may require it to be spread over multiple accounting periods. The rule is:

• If the contribution relates to one period only, it's deducted in that period
• If it's significantly larger than contributions in previous periods and covers past or future service, HMRC may spread it over the periods it relates to

In practice, HMRC rarely challenges contributions below the annual allowance for a single director. Spreading is more commonly applied to very large contributions (e.g., £100,000+) for multiple employees or to fund past service deficits.

Annual Allowance: The Key Limit

The annual allowance is the maximum total pension contributions (employer + employee) that qualify for tax relief in a tax year:

Important points:

• The £60,000 includes all pension contributions — employer contributions, personal contributions, and any third-party contributions
• It applies per individual, not per company
• If you have multiple pension schemes, they all count towards one allowance
• The allowance is based on the tax year (6 April to 5 April), not your company's accounting period

Carry forward of unused allowance

If you didn't use your full annual allowance in the previous three tax years, you can carry forward the unused amount. This means you could potentially contribute up to £180,000 + £60,000 = £240,000 in a single year if you've had three years of zero contributions.

Requirements:

• You must have been a member of a registered pension scheme in each carry-forward year (even if contributions were zero)
• You must use the current year's allowance first
• The carry forward goes back a maximum of three years

Tapered annual allowance (high earners)

If your "threshold income" exceeds £200,000 and your "adjusted income" exceeds £260,000, your annual allowance is reduced by £1 for every £2 of adjusted income above £260,000. The minimum tapered allowance is £10,000.

For most small company directors extracting a modest salary plus dividends, the taper won't apply. But if you have significant income from other sources (rental property, investments, spouse's business), check the thresholds.

Personal Contributions vs Employer Contributions

There's a crucial distinction:

Employer contributions (company pays into your pension)

• Corporation tax deduction for the company ✅
• No income tax on the director ✅
• No NIC (employer or employee) ✅
• Counts towards the annual allowance
• Reported as a business expense in the accounts

Personal contributions (you pay from your own money)

• No corporation tax deduction (it's your money, not the company's)
• Personal tax relief at your marginal rate (basic, higher, or additional)
• No NIC saving for the company
• Counts towards the annual allowance
• You must have relevant UK earnings at least equal to the contribution (or claim up to £3,600 gross without earnings)

The takeaway: Employer contributions are almost always better than personal contributions for director-shareholders. The company saves corporation tax and NIC, and the director avoids income tax and NIC.

How Much Can Your Company Contribute?

There's no hard statutory cap on employer contributions specifically. The limits are practical:

1. The annual allowance (£60,000 for 2025/26)

Contributions above this incur a tax charge on the individual (not the company). The charge is at the individual's marginal income tax rate, effectively cancelling out the tax relief.

2. The "wholly and exclusively" test

HMRC can challenge contributions that are disproportionate to the director's salary and role. A company paying its sole director a £12,570 salary but making a £60,000 pension contribution might face questions.

However, HMRC's own guidance (BIM46035) confirms that pension contributions don't need to be proportionate to salary — they just need to be made for the purposes of the trade. Courts have consistently upheld that remuneration packages including large pension contributions are allowable if the director provides genuine services.

3. Company cash flow

The contribution must actually be paid. If the company doesn't have the cash, the deduction can't be claimed.

4. Distributable profits

While pension contributions don't legally require distributable profits (unlike dividends), a company making large contributions while insolvent could face scrutiny from creditors and potentially from HMRC under anti-avoidance rules.

Timing: When to Make the Contribution

For corporation tax deduction

The contribution must be paid within the accounting period to get the deduction in that period's CT600.

For annual allowance purposes

The annual allowance runs on the tax year (6 April to 5 April). A company with a 31 March year-end filing its CT600 should note that:

• A contribution made on 31 March 2026 falls in the 2025/26 tax year
• A contribution made on 6 April 2026 falls in the 2026/27 tax year

If you're near the annual allowance limit, the timing matters for which tax year the contribution counts against.

Year-end planning

Many directors make a large pension contribution just before their company's year-end to:

• Reduce corporation tax for the current period
• Use up the current year's annual allowance
• Reduce profits and potentially qualify for the small profits rate (19% vs 25%)

Reducing Your Corporation Tax Rate with Pension Contributions

This is a powerful planning opportunity. For financial years starting on or after 1 April 2023:

The marginal relief band between £50,000 and £250,000 has an effective rate of 26.5% — higher than the main rate. This means a pension contribution that brings your profits from, say, £80,000 to £45,000 saves tax at 26.5% on the amount within the band.

Example

Company profits before pension: £80,000

• Corporation tax (with marginal relief): approximately £17,150

Company makes £35,000 employer pension contribution:

• Revised profits: £45,000
• Corporation tax at 19%: £8,550
• Tax saved: £8,600
• Effective relief rate: 24.6% on the contribution

That's significantly better than the 19% or 25% headline rates because you've moved profits out of the marginal relief band.

How to Report Pension Contributions on the CT600

Employer pension contributions are a deductible expense — they reduce your taxable profit. In most cases, no special CT600 box is needed beyond including them as an expense in your profit and loss account and tax computation.

However:

1. Include the contribution in your accounts as a staff cost / pension expense
2. Ensure it's not added back in the tax computation (unlike disallowable expenses)
3. If contributions are being spread by HMRC, adjust the deduction in the current period and carry the remainder to future periods
4. Keep evidence — bank statement showing the payment, pension provider confirmation, board minutes approving the contribution

Using Taxpipe

When filing with Taxpipe, enter your pension contributions as part of your expense summary. Taxpipe includes them in the tax computation as a deductible expense and calculates your corporation tax liability with the correct marginal relief where applicable.

File your CT600 with pension deductions →

Common Mistakes

1. Making the contribution after the year-end

If the money leaves the company's account even one day after the accounting period end, you can't claim the deduction until the next period. Plan ahead — don't leave it to the last day.

2. Exceeding the annual allowance without realising

The £60,000 includes all contributions from all sources. If you have a workplace auto-enrolment pension (from employment elsewhere) contributing £5,000, your company can only contribute £55,000 before the annual allowance is breached.

3. Not having a registered pension scheme

Contributions must go to a registered pension scheme (such as a SIPP or workplace pension registered with HMRC). Payments into unregistered arrangements don't qualify for tax relief.

4. Forgetting about auto-enrolment duties

If your company has any employees (including the director, if they have a contract of employment and earn above the trigger), it may have auto-enrolment duties. Non-compliance with The Pensions Regulator can lead to fines. This is separate from voluntary pension contributions but uses the same allowance.

5. Not documenting the contribution

Keep a clear paper trail: board minute (or written resolution) approving the pension contribution, bank statement showing the payment, and confirmation from the pension provider. If HMRC enquires, you'll need this evidence.

Salary Sacrifice and Pension Contributions

Some directors set up a salary sacrifice arrangement where they reduce their gross salary and the company pays the difference into their pension instead. This can save:

• Employer's NIC (13.8%) on the sacrificed salary
• Employee's NIC (8%) on the sacrificed salary
• Income tax on the sacrificed salary

The company's total cost stays roughly the same, but the pension contribution increases because of the NIC savings.

Example

Without salary sacrifice:

• Salary: £50,000
• Employer NIC: £5,691
• Total company cost: £55,691

With salary sacrifice (£20,000 sacrificed):

• Salary: £30,000
• Employer pension: £20,000 + NIC saving
• Employer NIC on £30,000: £2,931
• NIC saved: £2,760
• Total pension: £22,760 (original £20,000 + £2,760 NIC saving shared)

This is legitimate and widely used, but the salary sacrifice must be a genuine contractual change — not just a paper exercise.

Frequently Asked Questions

Can my company make pension contributions even if I only take a small salary?

Yes. There's no rule linking employer pension contributions to salary level. A company can pay a £12,570 salary and contribute £60,000 to the director's pension. The contribution just needs to be "wholly and exclusively" for the purposes of the trade.

Do employer pension contributions count towards my annual allowance?

Yes. The £60,000 annual allowance includes all contributions — employer, personal, and third-party. Employer contributions are the most tax-efficient, but they still use up the allowance.

Can I carry forward unused annual allowance if the company didn't contribute?

Yes, provided you were a member of a registered pension scheme during the carry-forward years. You don't need to have made contributions — just been a member. Opening a SIPP with zero contributions counts.

What if my company makes a loss after the pension contribution?

The pension contribution can create or increase a trading loss. The loss can be carried back one year for a refund of previously paid corporation tax, or carried forward against future profits.

Are pension contributions shown on the CT600 form specifically?

Not in a dedicated box. They're included in your accounts as an expense that reduces your profit. The CT600 tax computation includes them as part of the deductible expenditure. There's no separate disclosure requirement unless HMRC specifically asks.

Can my company pay into my spouse's pension?

Yes, if your spouse is a genuine employee or director of the company providing real services. The contribution must be justifiable as part of their remuneration. If your spouse has no role in the company, HMRC will likely challenge the contribution.

Related Articles

• Optimal Director Salary 2025/26: How Much Should You Pay Yourself?
• Corporation Tax Year-End Planning: 12 Tips

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