Pensions and Self-Assessment: What to Report to HMRC

For many individuals, pensions are the single largest source of complexity in their annual self-assessment tax return. Whether you are drawing income, making contributions as a higher-rate taxpayer, or navigating the annual allowance charge, understanding exactly what HMRC requires — and when — can save you significant money and avoid costly errors.

This guide covers the self-assessment obligations created by UK pensions, with particular attention to higher earners, retirees with multiple income sources, and internationally mobile individuals.

This guide is informational only. Tax rules change frequently. Always consult a qualified UK tax adviser or accountant for advice on your personal situation.

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Who Needs to Complete Self-Assessment?

HMRC does not automatically enrol everyone in self-assessment. However, pensions create a self-assessment requirement in several circumstances:

You have pension income plus other untaxed income over £2,500: If you receive a company pension or SIPP drawdown and also have rental income, freelance income, or overseas income, and the untaxed element exceeds £2,500, self-assessment is required.

You have taken flexible access from a pension: HMRC generally expects those who have exercised pension freedoms to file a return, particularly if an emergency tax code was applied to initial withdrawals.

You are a higher or additional rate taxpayer who made pension contributions: Basic-rate tax relief is added automatically by your provider, but higher-rate and additional-rate relief must be claimed — either through self-assessment or by contacting HMRC directly.

You have exceeded the annual allowance: Any annual allowance charge must be reported and paid through self-assessment.

You have overseas pension income: Foreign pensions received by UK residents are generally taxable in the UK and must be reported.

You are a non-resident receiving UK pension income: Different rules apply depending on your tax treaty position; HMRC will typically still require a return.

If you are unsure whether you need to file, HMRC's online tool (gov.uk/check-if-you-need-a-tax-return) is a useful starting point.

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Reporting Pension Income on Your Return

UK pensions in payment

All UK pension income — whether from a company scheme, personal pension, annuity, or SIPP drawdown — is taxable as income and must be reported on your self-assessment return.

On the SA100 main return, you report pension income in the "Pension income" section. You will need:

• The gross amount of pension received (before tax deducted)
• The tax already deducted at source (shown on your P60 or pension payslips)
• The name of each paying scheme

If you receive income from multiple schemes — for example, a former employer's defined benefit pension, a personal SIPP drawdown, and an annuity — each should be reported separately.

Do not enter the net amount received: HMRC needs the gross figure and the tax already deducted. Entering only the net figure will cause an understatement of gross income and a double credit for tax already paid.

State Pension

The State Pension is taxable income, but HMRC does not deduct tax at source from it. The full annual amount (not what you received after any deferred uplift complications) must be entered in the pension income section.

In practice, for PAYE pensioners who also have an occupational pension, HMRC typically collects State Pension tax by reducing the tax code applied to the occupational pension. But if you complete self-assessment, you must enter the State Pension separately and HMRC will calculate any additional tax due.

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Claiming Higher-Rate Tax Relief on Pension Contributions

This is perhaps the most common pension-related self-assessment issue — and the most frequently missed.

How basic-rate relief works: When you contribute to a personal pension, SIPP, or relief-at-source workplace scheme, your provider claims basic-rate tax relief from HMRC and adds it to your pot. If you contribute £800, your provider adds £200, giving you £1,000 in your pension. This happens automatically.

What self-assessment adds: If you pay income tax at 40% (higher rate) or 45% (additional rate), you are entitled to further tax relief beyond the 20% already claimed by your provider. This additional relief does not happen automatically — you must claim it.

On the SA100, you enter the gross pension contribution (the amount including basic-rate relief already added). For the £800 contribution above, you would enter £1,000 as the gross amount.

HMRC then calculates the additional relief:

• Higher-rate taxpayer (40%): An additional 20% on the gross contribution — on £1,000, that is £200 in relief.
• Additional-rate taxpayer (45%): An additional 25% on the gross contribution — on £1,000, that is £250.

This relief is typically applied via an adjustment to your PAYE tax code for the following year, or paid as a cheque or bank credit if you have no PAYE income.

Deadline for back-claims: You can claim higher-rate relief going back four tax years from the current date. For 2026, that means contributions from 2022/23, 2023/24, 2024/25, and 2025/26 can all still be claimed if missed. The claim is made either through self-assessment or by writing to HMRC directly.

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The Net Pay Arrangement: When No Claim Is Needed

If your workplace pension uses a net pay arrangement — common in public sector schemes and many large employer schemes — your contributions are deducted from your salary before income tax is calculated. You automatically receive full tax relief at your marginal rate through the payroll calculation. No further claim through self-assessment is necessary.

If you are unsure which arrangement your employer uses, check your payslip. Under relief at source, you will see the full gross salary before pension contribution, and the pension deduction shown separately. Under net pay, your taxable pay will already be reduced.

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Reporting the Annual Allowance Charge

If your total pension contributions in a tax year exceed your annual allowance (£60,000 in 2026/27, or your tapered annual allowance if applicable, or £10,000 if the money purchase annual allowance applies), you face an annual allowance charge.

The annual allowance charge is reported on your self-assessment return and is added to your income tax liability. The charge is calculated at your marginal rate of income tax on the excess contribution.

Carry forward: Before calculating any charge, ensure you have correctly applied any carry forward of unused annual allowance from the previous three tax years. Many individuals who believe they face a charge can eliminate it entirely through legitimate carry forward. The calculation should be documented carefully and attached to your return as supporting workings.

Scheme pays: If your annual allowance charge exceeds £2,000 and your excess contributions to a single scheme also exceed that scheme's annual allowance for the year, you can elect for the scheme to pay the charge on your behalf ("mandatory scheme pays"). The scheme then reduces your pension benefits actuarially. Voluntary scheme pays may also be available at the scheme's discretion. The election must be made by 31 July in the year following the relevant tax year.

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Overseas Pension Income

UK residents who receive pension income from a foreign country must report this on their self-assessment return in the "Foreign income" section (SA106 supplementary pages).

The rules are complex and depend on the relevant double taxation agreement (DTA) between the UK and the pension-paying country:

• Some DTAs (for example, with the USA) give the country of residence exclusive taxing rights over pension income — meaning UK residents pay UK tax only and are exempt from US tax.
• Other DTAs give the source country taxing rights, with the UK providing a credit for foreign tax already paid.
• A minority of DTAs have specific rules for government service pensions, which may be taxable only in the source country.

The reported gross amount should be the sterling equivalent using HMRC's published average exchange rate for the tax year (or the actual rate at each payment date if you have records). If foreign tax was withheld, it must be reported separately to claim the double taxation credit.

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Emergency Tax Codes on Pension Withdrawals

When you first draw from a pension in a tax year — particularly a SIPP — the administrator may apply an emergency tax code (typically Month 1 basis), which assumes the first payment will be repeated for the rest of the year. This frequently results in significant overtaxation.

HMRC provides three reclaim forms:

• P55: For a partial withdrawal where the pension has not been fully emptied and you are not drawing regular income
• P53Z: For a small pot commutation where the entire pension has been taken
• P50Z: For a full uncrystallised fund pension lump sum (UFPLS) from an entire pension that has been emptied

Alternatively, completing your self-assessment return at year end will result in any overpaid tax being refunded automatically. However, the reclaim forms allow you to recover overpaid tax in-year without waiting for year end — often recovering £1,000–£5,000 or more on larger withdrawals.

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Pension Income from a Limited Company

Directors who receive pension contributions from their limited company rather than making personal contributions face a different reporting picture:

• Employer contributions from the company: These do not appear on your personal self-assessment return. They are a business expense for the company and are not treated as personal income.
• Personal contributions (if any): These should be reported as described above if you are claiming higher-rate relief.
• The company's position: Employer pension contributions are generally deductible as a business expense if they are wholly and exclusively for the purposes of the business and are not excessive.

If you receive both salary from the company and draw pension income, both must be reported on your personal SA return.

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Key Deadlines and Practical Points

• Online filing deadline: 31 January following the end of the tax year (so 31 January 2027 for the 2025/26 tax year)
• Paper filing deadline: 31 October following the end of the tax year
• Back-claiming higher-rate pension relief: Up to four years prior
• Annual allowance charge scheme pays election: 31 July following the relevant tax year
• Overseas pension reporting: Use SA106 supplementary pages

It is worth noting that HMRC does not always prompt individuals to file if they believe the taxpayer's affairs are straightforward. It is the taxpayer's responsibility to register for self-assessment and file if required.

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How Global Investments Can Help

Global Investments works with high-net-worth individuals who frequently have multi-jurisdiction pension arrangements — UK company pensions, overseas schemes, SIPP drawdown, and foreign retirement income all on a single tax return. This complexity requires specialist UK tax knowledge combined with an understanding of how international income and pension rules interact.

Our associated UK tax professionals can prepare your self-assessment return, ensure all pension income and contributions are correctly reported, reclaim any higher-rate relief you may have missed, and advise on annual allowance charge mitigation. We also work with internationally mobile clients who need advice on double taxation treaty positions, overseas pension reporting, and the interaction of UK self-assessment with foreign tax obligations. Contact our team to discuss your situation.

Tax rules are subject to change by HMRC and Parliament. This guide reflects the position as understood in June 2026 and should not be relied upon as definitive legal or tax advice.