Reclaiming Overpaid Tax After Redundancy: The P50 Explained

A P50 form is used to reclaim tax overpaid after leaving a job when you do not expect to return to work before the current tax year ends. PAYE often overtaxes a final payment because it assumes your usual pay will continue, and a P50 claim, submitted with your P45 details, allows HMRC to recalculate and refund the difference without waiting for the tax year to finish.

Why a final payment often looks overtaxed

PAYE calculates tax through the year on a cumulative basis, generally assuming your income pattern will continue at a similar level for the rest of the tax year. When a job ends partway through the year, particularly with a redundancy payment on top of a final salary payment, this assumption can result in more tax being deducted than is actually owed once the full picture, including no further income for the rest of the year, is taken into account.

This is not usually an error by the employer or payroll system; it reflects how PAYE is designed to work in the absence of information confirming that your income has genuinely stopped, which is exactly the gap a P50 claim is designed to fill.

The £30,000 tax-free redundancy threshold

A genuine redundancy payment is tax-free up to £30,000, with any amount above that threshold taxed as income. This tax-free treatment applies specifically to qualifying redundancy payments, not to other elements sometimes paid alongside redundancy, such as pay in lieu of notice or accrued holiday pay, which are typically taxed as normal income regardless of the £30,000 threshold.

Understanding which parts of a final settlement fall under the tax-free redundancy treatment and which are taxed as ordinary income is useful context before assessing whether an overpayment has genuinely occurred, since not every element of a leaving payment is treated the same way for tax purposes.

When to use a P50, and when not to

A P50 is specifically for someone who does not expect to work again, claim certain benefits, or start receiving a pension before the current tax year ends. If you expect to start a new job before the tax year finishes, the correct route is usually to give your new employer your P45, which allows PAYE to continue on a cumulative basis and typically corrects any earlier overpayment automatically through your ongoing pay, without a separate P50 claim.

Using a P50 while also expecting to return to work shortly afterward can complicate the calculation, so it is worth being reasonably confident about your employment status for the remainder of the tax year before submitting one.

What you need to make a P50 claim

A P50 claim requires the figures from your P45, specifically your total pay and tax paid in the tax year up to the point you left, along with details of any taxable benefits received and confirmation of whether you are claiming certain benefits that would affect the calculation. HMRC uses these figures to recalculate your tax position for the year to date and determine whether a refund is due.

If you have lost your P45 or your former employer has not yet issued it, contacting them directly to request a copy, or contacting HMRC for guidance on how to proceed without it, is the usual next step before submitting a claim.

How long a refund typically takes

Once a P50 claim is submitted with the correct information, HMRC generally processes the refund within a number of weeks, though exact timescales vary depending on current processing volumes and whether any additional information is needed to verify the claim. Refunds are typically paid directly to a bank account or by cheque, depending on the details provided.

If a claim is taking noticeably longer than the timescales indicated by HMRC at the time of submission, checking the online status of the claim, where available, or contacting HMRC directly, is a reasonable next step rather than assuming the claim has been lost.

What happens if you do go back to work later in the same tax year

If your circumstances change and you start work again later in the same tax year after already receiving a P50 refund, this does not necessarily mean the refund was wrong, but your new employer's PAYE calculation, combined with the earlier refund, needs to correctly account for your full year's income to avoid either underpaying or overpaying tax for the year as a whole.

In practice, PAYE and HMRC's systems are generally able to reconcile this over the course of the tax year, but if you are unsure whether starting new work shortly after a P50 refund will create a complication, contacting HMRC to confirm the correct approach before it becomes an issue at the end of the tax year is a sensible precaution.

How this interacts with claiming benefits

If you are also claiming, or planning to claim, benefits such as Universal Credit after redundancy, it is worth understanding that a tax refund received through a P50 counts as income or capital for benefit assessment purposes in the period it is received, which can temporarily affect the benefit amount you are entitled to. Timing the claim, or at least being aware of this interaction before the refund arrives, avoids an unwelcome surprise in your benefit calculation for that assessment period.

How this connects to using your annual capital gains allowance

Every UK taxpayer has an annual capital gains tax allowance, an amount of gains that can be realised tax-free each year, and for an investor with a long-running DRIP holding outside a tax wrapper, periodically selling a small portion of the holding to use this allowance, rather than only selling everything in one go decades later, can spread the eventual capital gains tax liability across many years instead of triggering it all at once. This approach requires the same careful share matching record-keeping described above to calculate correctly.

Checking your tax code afterward

After a P50 refund is processed, it is worth checking that your tax code, if you do go on to start new work later in the same or a following tax year, reflects the correct position rather than carrying forward an outdated assumption from the earlier calculation. An incorrect tax code following a P50 claim can occasionally result in under or overpayment further down the line, which is usually resolved simply by contacting HMRC to confirm the code is accurate for your current circumstances.

Why platform-provided tax summaries are a starting point, not the final word

Many platforms provide an annual consolidated tax certificate summarising dividend income for the year, which is a useful starting point for a Self Assessment return, but it is worth checking this against your own understanding of what was actually reinvested, particularly if you hold the same investment across more than one platform or account, since a consolidated figure from a single provider will not capture dividend income earned elsewhere.

Frequently asked questions

When should I use a P50 instead of waiting for my new employer?

A P50 is for when you do not expect to work again, claim certain benefits, or start a pension before the tax year ends. If you expect to start a new job soon, giving your new employer your P45 usually corrects the tax automatically instead.

Is my whole redundancy payment tax-free?

Only up to £30,000 of a genuine redundancy payment is tax-free. Amounts above that, and other elements such as pay in lieu of notice, are generally taxed as normal income.

What do I need to submit a P50 claim?

The figures from your P45, including total pay and tax paid in the tax year to date, along with details of any taxable benefits and relevant benefit claims.

How long does a P50 refund take?

HMRC generally processes claims within a number of weeks, though this can vary depending on processing volumes and whether additional information is required.