Understanding Payments on Account Refunds from HMRC

Understanding Payments on Account Refunds from HMRC
Charlotte Baroukh

Charlotte Baroukh

Tax Expert @ Pie

3 min read

Updated: 12 Mar 2026

3 min read

Updated: 12 Mar 2026

What do you need to know

Paid too much tax on account and wondering how to get your money back? You're not alone in feeling confused about HMRC refunds. Many taxpayers overpay without realising they can claim money back.

 

The good news is that getting a payments on account refund explained doesn't have to be complicated. In this article, we'll cover everything you need to know about claiming your overpaid tax back from HMRC.

 

Payments on account are advance tax payments you make twice yearly based on last year's bill. HMRC holds this money until your actual tax liability is calculated. Refunds happen when you've paid more than you actually owe.

 

This often occurs after income drops, expenses increase, or life changes happen. Many cases process automatically, but sometimes you'll need to make manual claims. Additionally, your refund can include interest if HMRC delays processing.

How do I know if I'm owed a refund?

Your Self Assessment shows a negative balance or credit amount clearly. You might receive an unexpected payable order or cheque from HMRC. Furthermore, your online tax account displays "Amount you've overpaid" prominently.

 

Recent life changes like job loss or reduced income often trigger refunds. Perhaps you've made voluntary payments that exceeded your final tax bill. HMRC sometimes sends letters confirming overpayment and refund processing.

 

I remember checking my account after reducing my work hours and discovering a £2,400 credit. The relief was immediate, knowing that money would soon return to my bank account.

How do I know if I'm owed a refund?

What's the fastest way to claim my overpaid tax?

Check your Personal Tax Account online first for automatic processing. If nothing appears, call HMRC directly for immediate help. Submit form R40 if you're not registered for Self Assessment.

 

File your Self Assessment return promptly to trigger automatic refunds. Provide bank details online to speed up electronic transfers. Additionally, keep records of all payments made throughout the tax year.

How long does HMRC take to process refunds?

Automatic refunds typically arrive within 5-6 weeks of filing. Manual claims can take 8-12 weeks depending on complexity. Electronic transfers arrive faster than postal cheques.

 

Summer months often see longer delays due to high volumes. Simple cases process quicker than those requiring investigation. You can chase progress after 6 weeks using HMRC's online tracker.

How long does HMRC take to process refunds?

Can I get interest on my overpaid tax?

HMRC pays supplement interest on delayed refunds over £50. Interest starts building 12 months after the relevant tax year ends. Current rates change regularly but typically range 0.5-2% annually.

 

You don't need to apply separately as interest calculates automatically. Supplement payments arrive as separate transactions from main refunds. However, interest itself may be subject to income tax depending on circumstances.

Final summary

You can appeal their decision within 30 days of notification. Request a review explaining why you believe you're owed money. Gather supporting evidence like P60s, receipts, and payment records.

 

Consider contacting HMRC's complaints team for procedural issues. Seek professional advice for tricky cases or large amounts. Remember that legitimate overpayments will eventually be resolved.

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