HMRC cares about the date the money arrives, not the date you sent it. Cross-border transfers take days, and a payment sent on the deadline is a late payment.
Two things go wrong when a UK tax bill is settled from an overseas bank account, and neither is about tax. The first is timing: international payments clear over days, not hours, and HMRC treats a payment as made when it receives cleared funds. The second is cost: converting from your local currency to sterling through a retail bank typically loses more to the exchange spread than to any visible fee.
Get the Reference Right First
Every HMRC payment needs the reference that tells it which liability the money settles. For Self Assessment that is built from your Unique Taxpayer Reference, and it is not interchangeable with a PAYE, VAT or Corporation Tax reference. Payments that arrive without a usable reference are not lost, but they sit unallocated while interest continues to run on a bill that looks unpaid.
Check the reference on the demand itself, not from memory or an old email. Self Assessment references carry a suffix that identifies the period, and using last year's reference is a common and irritating way to have a payment misapplied.
The Cost You Cannot See
| Route | Typical speed | Where the cost hides |
|---|---|---|
| Local bank international transfer | 2–5 working days | Exchange spread, plus correspondent bank charges |
| Specialist FX provider | 1–3 working days | Narrower spread, explicit fee |
| Payment from a retained UK account | Same day, usually | Whatever it cost you to get sterling into it |
| Card payment | Fast | Card FX rate, and business cards may carry a fee |
The pattern most expats settle on is to keep a UK current account open, move money into it when the rate suits rather than when the bill falls due, and pay HMRC domestically from there. That converts an FX problem with a deadline into an FX decision without one. Our guides to keeping a UK bank account and currency risk cover both halves.
Send Early, Not On the Day
- Work backwards from the deadline by at least three working days, and more where a weekend or a public holiday in either country sits in between.
- Remember two calendars. A bank holiday in your new country stops the payment leaving just as effectively as a UK one stops it arriving.
- Send the full amount. If an intermediary bank deducts a charge in transit, the shortfall is a part-paid liability, and interest runs on the balance.
- Keep the confirmation with the date, amount and reference. It is what resolves an allocation dispute later.
Payments on Account Catch Leavers Twice
Anyone leaving the UK part-way through a Self Assessment history usually has payments on account already scheduled, calculated from a year in which they were still earning here. They fall due after the departure, in a year when the income they were based on has stopped. That is a genuine cash-flow event rather than a tax one, and it can often be reduced — our guide to payments on account explains how, and what happens if you reduce them too far.
If You Cannot Pay in Full
HMRC has a formal arrangement for spreading a bill, and living abroad does not exclude you from it. It is far better than silence: interest continues either way, but an agreed arrangement generally prevents the escalation that follows non-payment. See Time to Pay arrangements. The one thing not to do is assume distance provides insulation — the UK has recovery arrangements with many jurisdictions, and a debt does not lapse because you moved.
Frequently Asked Questions
Does HMRC count the date I sent the payment or the date it arrived?
The date cleared funds reach HMRC. With international transfers taking several working days, a payment initiated on the deadline is a late payment and attracts interest.
Can I pay HMRC in my local currency?
Payments settle in sterling, so a conversion happens somewhere in the chain. The only question is whether you control it or your bank does, and controlling it is usually worth real money.
What happens if my payment arrives without the right reference?
It sits unallocated. The money is not lost, but the liability still looks unpaid and interest continues, so it is worth contacting HMRC with the transfer details to have it matched.
I have payments on account due after I have left the UK. Can I reduce them?
Often yes, where your UK income has genuinely fallen. Reducing them too far attracts interest on the shortfall, so base the reduction on a realistic estimate rather than an optimistic one.
Related Guides
Keep reading with these related guides and calculators:
- Payments on account — the bill that follows you abroad
- Time to Pay — when the bill cannot be met in full
- Keeping a UK bank account — the cheapest way to pay
- Currency risk — controlling the conversion
- When to stop filing — ending the obligation entirely
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