How to update your bank details with HMRC

How to update your bank details with HMRC isn’t always a one-click job. It depends on why HMRC holds your bank info—whether for a tax refund, Child Benefit, Tax Credits, or Self Assessment overpayment. Get it wrong, and your money could sit in limbo or head to the wrong account.

Here’s the quick rundown:

• Online works best for many cases, especially via your HMRC personal tax account or the HMRC app.
• Phone or post is often required for benefits like Tax Credits or Child Benefit.
• Act fast if you’re expecting a repayment—delays mean slower refunds.
• You’ll need your Government Gateway login, National Insurance number, and exact bank details (sort code, account number, account name).
• Security first—HMRC verifies identity to prevent fraud.

This guide walks you through the process step by step, no fluff. Whether you’re a freelancer chasing a Self Assessment refund or a parent updating Child Benefit payments, you’ll know exactly what to do.

Why updating bank details with HMRC matters

Your bank info tells HMRC where to send refunds, credits, or benefits. Switch banks? Move house and update your account? Old details can block payments or force HMRC to issue a cheque instead—which takes longer and risks getting lost.

Think of it like forwarding mail. Miss the update, and important cash takes the long way around. In my experience over a decade helping clients sort tax headaches, this small step prevents big frustrations.

How to update your bank details with HMRC: Your options

HMRC doesn’t offer one universal button for every situation. The method varies by tax type.

For Self Assessment users expecting a refund, you often add or change details directly when filing or amending your return. For ongoing payments like Child Benefit or Tax Credits, sign into your online account or use a specific form.

PAYE employees rarely need to update bank details directly with HMRC—your employer handles salary, and tax code adjustments happen via your P60 or online. But if HMRC owes you personally, different rules apply.

Pro tip: Always use the same bank account name as registered with HMRC. Mismatches cause rejections.

Step-by-step: Updating bank details online (the fastest route for most)

Most people start here. Grab your Government Gateway ID ready.

1. Sign in to your HMRC account
   Go to GOV.UK and search for “personal tax account” or head straight to the HMRC app. No account? Create one—it takes minutes and verifies your identity.
2. Navigate to your details or relevant service
   For Child Benefit, there’s a direct “change of bank” option. For Self Assessment, check your tax return or repayment section.
3. Enter new bank info
   Input the 6-digit sort code, 8-digit account number, and full account name exactly as on your bank statement. Double-check—no typos.
4. Verify and submit
   HMRC may ask for extra ID proof. Submit, and you’ll usually get confirmation.
5. Check status
   Log back in after a few days to confirm the change stuck.

Simple, right? But not every scenario fits this flow.

For Tax Credits specifically, online changes aren’t always available—you may need to phone or post details.

When you need to phone or write to HMRC

Online isn’t universal. Here’s when to pick up the phone or grab a pen:

• Tax Credits changes often require calling the dedicated helpline or sending a letter.
• Complex cases like joint claims, overseas accounts, or disputes.
• No online access or verification fails.

Key phone numbers (as of 2026):

• Income Tax helpline: 0300 200 3300
• Self Assessment: 0300 200 3310
• Child Benefit: 0300 200 3100

Have your National Insurance number, current and new bank details, and reason ready. Calls can involve waits, so call early in the day.

Postal option: Write to the address listed on your latest HMRC letter for your tax type. Include copies (not originals) of bank statement and ID.

What I’d do: If time is tight and a refund is coming, call first thing. Follow up in writing if they request it. Keeps a paper trail.

Preparing your information: A quick checklist

Before you start, gather this:

• Government Gateway username and password
• National Insurance number
• Full name on the bank account
• Sort code (6 digits)
• Account number (8 digits)
• Bank name and branch (sometimes required)
• Reason for the change (e.g., new bank, switched accounts)
• Any reference numbers from recent HMRC letters

Common gotcha: The account name must match exactly. “John Smith” vs. “J Smith” can trip the system.

Comparison of update methods

Here’s a clear breakdown to help you pick the right path:

Method	Best For	Time to Complete	Speed of Update	Pros	Cons
Online (Account/App)	Self Assessment, Child Benefit	5-15 minutes	1-7 days	Fast, trackable, no waiting	Not available for all benefits
Phone Call	Tax Credits, urgent cases	10-45 minutes	Variable	Direct help, clarify issues	Hold times, need to be available
Post	Formal records, no online access	Days to prepare	Slowest	Good for evidence	Delays, risk of loss

Choose online whenever possible. It’s the least painful.

Common mistakes when updating bank details with HMRC (and how to fix them)

I’ve seen these trip people up repeatedly:

• Wrong format — Sort code must be 6 digits, account 8. Fix: Copy straight from your bank app or statement.
• Name mismatch — Even middle initials matter. Fix: Use the exact name the bank uses for the account.
• Forgetting to update for specific benefits — Telling HMRC about a new address doesn’t always cascade to bank details. Fix: Check each service separately.
• Assuming one change covers everything — Self Assessment refund details don’t auto-apply to Child Benefit. Fix: Update per tax area.
• Not confirming the change — Submit and walk away. Fix: Log in after 48 hours to verify.

Spot a mistake? Contact HMRC immediately with your reference. The sooner you catch it, the better.

Action plan: A beginner-friendly checklist for how to update your bank details with HMRC

Follow this sequence:

1. Identify why HMRC has your bank details (refund, benefit, etc.).
2. Log into your HMRC personal tax account or app.
3. Search for “change bank details” or navigate to the relevant section (Child Benefit, Self Assessment, etc.).
4. Enter new details carefully.
5. Submit and note any confirmation number.
6. If no online option, call the correct helpline with all info ready.
7. Keep records of what you sent and when.
8. Monitor your HMRC account and bank statements for the next payment.

Do this once correctly, and future headaches vanish.

Rhetorical question: Why let a simple bank switch delay your hard-earned refund?

It’s like changing your Wi-Fi password—do it right, and everything flows smoothly again.

Real-world considerations

Timing matters. If you’re due a large repayment, update before HMRC processes it. Changes can take days to reflect.

For overseas accounts or non-UK banks, extra forms apply—expect more verification.

If you’re self-employed or have multiple income sources, double-check during your next Self Assessment filing. Adding bank details there often sets the default for repayments.

In practice, most updates sail through online. The exceptions? Benefits with joint claimants or older records. Patience and clear communication win those.

Key Takeaways

• How to update your bank details with HMRC starts with signing into your Government Gateway or HMRC app for quickest results.
• Gather exact bank info and your NI number before starting.
• Online works for many, but phone or post is needed for Tax Credits and some cases.
• Verify the change after submission—don’t assume it’s done.
• Avoid name or format mismatches to prevent rejection.
• Update per tax type; one change doesn’t always cover all.
• Keep records of communications for your own peace of mind.
• Act early if expecting payments to avoid delays.

Common Mistakes section (repeated for emphasis? No—integrated above, but here’s a focused list)

• Entering incorrect digits.
• Using a joint account without both names matching records.
• Ignoring confirmation emails or letters.
• Waiting too long when a payment is imminent.

Fix: Triple-check, then check again. Contact support if anything feels off.

Conclusion

Getting your bank details right with HMRC keeps your money moving where it belongs—into your pocket, not stuck in admin. It’s rarely complicated once you know the right door to knock on.

Next step? Log into your HMRC account today and check what they currently hold. A few minutes now saves weeks later.

Do it properly, and you’ll sleep easier knowing refunds or benefits land safely.

External Links

1. sign in to update your Child Benefit bank details“
2. your HMRC personal tax account“
3. report changes that affect your Child Benefit“

FAQ :