Why pensions still work hard for owner-managers

If you run a small business, a pension is one of the few remaining ways to turn profit into long-term savings while getting a genuine tax deduction along the way. Money paid into a registered pension scheme attracts tax relief, grows broadly free of UK income tax and capital gains tax, and is normally free of inheritance tax — although that last point is changing from April 2027, when unused pension funds are due to be brought into the estate for inheritance tax purposes.

How you contribute depends on how you trade. A limited company director can usually have the company pay in directly, while a sole trader or partner contributes personally and claims relief through self-assessment. Both routes are generous, but both come with limits and admin duties that are easy to get wrong.

If you run a limited company

Employer pension contributions are one of the most efficient forms of remuneration available to a company owner. The company gets corporation tax relief on the contribution, there is no employer or employee National Insurance to pay, and the contribution is not a taxable benefit in kind for the director or employee receiving it.

• Timing: relief is generally given when the contribution is actually paid, not when it is accrued in the accounts, so a payment made shortly after the year end may fall into the following period.
• Wholly and exclusively: the contribution should be made for the purposes of the trade and be consistent with the remuneration package of the person it is for. Very large one-off payments for an owner-manager with a modest salary can attract scrutiny.
• Salary sacrifice: exchanging part of a salary for an employer pension contribution saves employee and employer NICs as well as income tax, but it must be properly documented and must not take pay below the National Minimum Wage.
• Spreading rule: if contributions in a period exceed £500,000 and are more than 210% of the previous period's, corporation tax relief may be spread over several years.

Sole traders and partners

If you are self-employed you make personal contributions, and the amount you can claim relief on is capped at the higher of £3,600 (gross) and 100% of your relevant UK earnings for the tax year. Relevant earnings broadly means profits from your trade or profession, plus employment income if you have any.

Relief works at source: your pension provider claims basic rate relief and adds it to your pot. So a £1,000 gross contribution costs a basic rate taxpayer £800, a higher rate taxpayer £600, and an additional rate taxpayer £550. Higher and additional rate relief is claimed by extending your basic rate band on your self-assessment return, and Scottish taxpayers follow a similar process with Scottish rates applied.

Two practical points are often missed. First, pension contributions do not reduce your trading profits for Class 4 National Insurance purposes — the saving is purely income tax. Second, they do reduce your adjusted net income, which can protect your personal allowance above £100,000, reduce the High Income Child Benefit Charge, and help with tax-free childcare eligibility.

Annual allowance and carry forward

The standard annual allowance is £60,000 across all your pension savings, including any employer contributions. If you have not used the full allowance in the previous three tax years, you can often carry it forward — but you must use the current year's allowance first, and you generally need to have been a member of a registered scheme in the year whose allowance you are using.

• Tapered allowance: if your adjusted income exceeds £260,000 and your threshold income exceeds £200,000, your allowance reduces, down to a minimum of £10,000.
• Money purchase annual allowance: if you have flexibly accessed a defined contribution pot, your allowance for further money purchase contributions drops to £10,000.
• Charges: contributions above your available allowance trigger an annual allowance charge at your marginal rate, which is usually collected through self-assessment.
• Lifetime limit: the old lifetime allowance has gone, replaced by lump sum allowances of £268,275 and £1,073,100 for most people.

Do not forget your auto-enrolment duties

Running a pension for yourself does not replace your obligations as an employer. If you have staff, you must enrol eligible workers into a qualifying scheme and pay at least 3% of qualifying earnings as an employer contribution, with total contributions of at least 8%. Qualifying earnings for 2025/26 sit between £6,240 and £50,270, and the earnings trigger remains £10,000.

• Assess new starters and re-assess staff whose earnings change.
• Pay contributions by the statutory deadline — late payments can lead to penalties.
• Re-enrol eligible staff roughly every three years and complete your declaration of compliance.

Getting the detail right

A little forward planning makes a real difference. Diarise your year end, check your available allowance including carry forward, and run the numbers on an employer contribution versus a salary sacrifice arrangement — the NIC saving often makes the employer route more efficient for a company director.

Regular monthly contributions smooth out cash flow and reduce the risk of breaching the annual allowance in a bumper year. Keep records of every contribution, check your payroll is applying relief correctly, and if you are considering a contribution above your normal pattern, speak to a regulated adviser and your accountant before you pay. For larger sums, especially with the inheritance tax changes on the horizon, the timing of a contribution can matter as much as the amount.