First pension withdrawal: why the tax deducted can differ from the final bill
A first taxable pension withdrawal can arrive with more tax deducted than you expected. The provider may have had to use a temporary PAYE basis rather than a calculation reflecting your complete income for the year.
That does not mean every large deduction is wrong or that every first withdrawal creates a refund. Separate three figures: the gross withdrawal, the amount initially paid after deductions and the final tax liability across the tax year.
Ask how the provider will process the payment
Before withdrawing, ask what part of the payment is taxable, which tax code will be used and whether the instruction specifies a gross amount or a net amount to receive.
HMRC's guidance explains when a pension administrator uses an emergency tax code on a month-one basis for an initial flexible payment. The treatment depends on the information available, including whether an appropriate current-year code or P45 can be used. HMRC: PAYE on flexible pension payments.
Do not assume the provider is free to substitute your own estimate of annual tax. Ask for an illustration of the likely deduction and the information it needs, allowing time before a bill must be paid.
The first payment is not the whole year's calculation
A month-one calculation treats the payment under a limited period's allowances and bands. A large one-off payment can therefore produce a deduction that differs from the result after considering the full year.
The final position depends on all relevant income and reliefs, not just the pension. Employment, other pensions, savings income and other amounts can affect the total. GOV.UK explains the broad treatment of pension income alongside other taxable income. GOV.UK: tax when receiving a pension.
Keep the distinction in both directions. A possible initial over-deduction is not a guarantee of a refund, and an initially modest deduction is not proof that nothing more will be due.
Plan the cash arriving, not just the withdrawal amount
Suppose a fictional £10,000 gross payment has £2,800 deducted and £7,200 reaches the bank. If the final tax attributable to that payment were later established as £2,000, the difference would be £800.
These are invented amounts illustrating the reconciliation, not a PAYE calculation or a forecast of someone's tax. The immediate spending resource is £7,200, while the possible £800 adjustment depends on the actual final assessment and process.
If a £9,000 bill must be paid immediately, counting a hoped-for refund as already available would leave a gap. Allow for payment timing and confirmed net proceeds when arranging a withdrawal for a specific expense.
Use the correct repayment route
HMRC provides different processes depending on whether the pension pot was emptied, whether further payments will be taken and other circumstances. P55 is not the right form for every pension-tax refund.
The P55 guidance concerns specified cases where part of a pot has been flexibly accessed, no further regular or flexible payments are planned before the tax-year end and the pension body cannot make the refund. It links to other routes where the pot has been emptied and explains separate treatment for non-residents. GOV.UK: claiming a flexible-pension tax repayment.
Check eligibility against the current guidance. If uncertain, contact HMRC rather than selecting a form because someone with a different withdrawal pattern used it successfully.
Keep the paperwork and estimates together
Retain the payment statement showing gross amount, taxable amount, tax deducted and net proceeds. Keep any P45, tax-code notice and correspondence about corrections or repayments.
A repayment claim may require estimates of income for the rest of the year. Record how those estimates were made and update the position if circumstances change. A refund based on an estimate is not necessarily the final reconciliation.
If you complete Self Assessment, make sure the return and any repayment already received are handled consistently. Give the accountant the repayment correspondence as well as the original pension statement so the same tax is not treated as still outstanding.
Keep the tax process separate from the withdrawal decision
Solving a PAYE mismatch does not determine whether taking the money was appropriate. The withdrawal can also affect invested capital, future retirement income and, depending on the type of access, future pension contribution allowances.
Ask an adviser to consider those consequences before making an initial taxable withdrawal solely to test the system or obtain a new tax code. An administrative convenience should not obscure a material change to the retirement plan.
The practical aim is to understand the payment before requesting it, fund any immediate spending from confirmed net proceeds and reconcile the tax using the correct process afterwards.
Related reading
Sources and context
General educational information, not personal financial advice. Examples are illustrative unless identified as recorded evidence.
Sources checked 18 September 2026. Our editorial standards.