HMRC Self Assessment Contact Number: Official Phone Lines, Opening Hours, Faster Routes

The HMRC Self Assessment contact number is 0300 200 3310, the phone line HM Revenue and Customs runs for tax return queries, payments and notices. Lines are open Monday to Friday, 8 AM to 6 PM, and closed on bank holidays. Callers outside the UK should dial +44 161 931 9070 instead.

Key Takeaways

• The HMRC Self Assessment helpline number is 0300 200 3310, open Monday to Friday, 8 AM to 6 PM, closed on all bank holidays.
• Callers outside the UK should use +44 161 931 9070 instead of the standard number.
• HMRC’s X account, @HMRCcustomers, runs longer hours than the phone line: Monday to Friday 8 AM to 8 PM and Saturday 8 AM to 4 PM.

What Is the HMRC Self Assessment Contact Number?

The number to call for Self Assessment queries is 0300 200 3310. HM Revenue and Customs uses this line for questions about tax returns, payments, notices and personal detail changes. It sits alongside separate numbers for PAYE, VAT, Child Benefit and National Insurance, so calling the wrong one adds an extra transfer to an already long wait.

GOV.UK confirms 0300 200 3310 as the current number, last verified 28 January 2026, and it is the only number listed on HMRC’s own contact page for this purpose.

The HMRC Self Assessment helpline number, 0300 200 3310, connects callers directly to advisers who handle tax return queries, payment issues and notice disputes. It does not cover PAYE, VAT or Child Benefit questions, which each have their own dedicated line published on GOV.UK’s contact hub.

HMRC Self Assessment Opening Hours and Every Way to Contact Them

Phone is only one route into HMRC, and for many queries it is not the quickest. The table below sets out the full HMRC self assessment phone number opening times alongside every other official channel, drawn directly from GOV.UK’s contact pages.

Not every enquiry needs the Self Assessment number. HMRC runs several other free lines beyond Self Assessment, and the HMRC telephone number free 0800 0345 opening times page covers one of these alternative routes for readers who reach the wrong department by mistake.

Widely circulated claim: several online guides state HMRC’s Self Assessment phone line runs from 8 AM to 8 PM on weekdays and 8 AM to 4 PM at weekends and bank holidays.

Correct position: the phone line itself runs Monday to Friday, 8 AM to 6 PM, and is closed entirely on bank holidays. The longer 8 AM to 8 PM weekday and 8 AM to 4 PM Saturday hours belong to HMRC’s X account, not the phone line.

Source: GOV.UK, Self Assessment general enquiries, updated 28 January 2026.

How to Contact HMRC From Outside the UK?

The overseas HMRC Self Assessment contact number is +44 161 931 9070, used instead of 0300 200 3310 for anyone calling from outside the UK. The same Monday to Friday, 8 AM to 6 PM hours apply, calculated in UK time rather than a caller’s local time zone.

Time differences catch many overseas Self Assessment callers out. Someone dialling from Sydney or Auckland during their own afternoon may find the UK line has already closed.

Check the current UK time before calling, and have a Unique Taxpayer Reference ready, since HMRC cannot access a record without it.

What You Need Ready Before You Call HMRC?

Calling HMRC without the right details on hand is the single most common reason for a wasted call. Before dialling 0300 200 3310, gather the following:

1. A Unique Taxpayer Reference, a ten digit number found on previous tax returns or HMRC letters.
2. A National Insurance number, used alongside the UTR for identity verification.
3. Details of the specific tax year the query relates to, such as 2024 to 2025.
4. Any reference number from a recent letter or notice, if the call concerns one.
5. A pen and paper to note the adviser’s name and the date of the call.

Having all five ready before the security check begins can shave several minutes off the call.

Common Mistakes That Delay Your Call

Most delays on HMRC calls come from a handful of avoidable errors rather than genuine complexity. Avoid these common mistakes:

• Calling in the last half hour before closing, when a dropped connection means starting the security check again the next working day.
• Explaining the full background of a query to the automated system instead of a short phrase such as tax return or payment.
• Missing the UTR or National Insurance number, which forces the call to restart from the beginning.
• Calling on the Monday after a bank holiday weekend, historically one of HMRC’s busiest days.
• Assuming a number found through a search engine is correct without checking it against GOV.UK first.

Calling mid morning on a Tuesday or Wednesday, away from the Monday surge, tends to produce the shortest waits.

What Happens During HMRC’s Security Check?

HMRC’s Self Assessment line uses a speech recognition system before any adviser joins the call, and understanding how it works avoids most of the frustration callers report. The process runs in a fixed sequence:

1. An automated voice asks why the caller is calling. A short answer such as tax return query works better than a full sentence, since the system matches key phrases rather than full context.
2. If the system recognises the query, it may route the caller straight to relevant guidance or a specific queue, with no human involvement.
3. Once queued for an adviser, the system or adviser asks security questions drawn from the UTR, National Insurance number, address and previous correspondence.
4. Only after security clears can the adviser discuss any details of the caller’s Self Assessment record.

This process exists because HMRC cannot legally discuss a taxpayer’s affairs with anyone whose identity has not been confirmed, so the check cannot be rushed or skipped, even when the query feels urgent.

What to Do If You Cannot Get Through?

A busy line still leaves other ways to get help, especially in January when call volumes peak around the 31 January Self Assessment deadline. If calling repeatedly is not working, these alternatives are worth trying:

• Switch to the digital assistant first, since it can resolve straightforward queries such as registering, filing or requesting a refund without any wait.
• Ask the digital assistant to transfer to a live webchat adviser, which often has shorter queues than the phone line during peak weeks.
• Contact HMRC’s Extra Support Team if a health condition, disability or personal circumstance makes calling difficult, since this route can arrange a face to face visit or a scheduled callback.
• Ask an accountant or tax agent to use the Agent Dedicated Line, which is separate from the public number and not open to individual taxpayers directly.
• Write to HMRC at the Self Assessment postal address for non urgent queries, expecting a response within several weeks rather than days.

None of these routes fully replace the phone line, but each one takes pressure off it during the busiest weeks of the year.

When Your Query Is Not a Self Assessment Matter?

Not every query that mentions HMRC actually belongs on the Self Assessment line. State Pension queries, for example, are handled by the Department for Work and Pensions rather than HMRC, even though both sit within the same tax and benefits system.

Anyone unsure how do I contact DWP by phone for a pension or benefits question should use DWP’s own contact details rather than HMRC’s, since Self Assessment advisers cannot access DWP records.

The same applies to tax credits now transitioning to Universal Credit, which DWP administers directly. Checking which department holds the record before calling avoids a wasted call and a further transfer once connected.

Common Myths About HMRC Contact Numbers and What Is Actually True

Conclusion

Getting through to HMRC about a Self Assessment query starts with one verified number, 0300 200 3310, called during the correct hours with the right details ready. Digital routes and the Extra Support Team give callers other options when lines are busy. The HMRC Self Assessment contact number means faster, better prepared support for UK taxpayers in 2026.

FAQ

Is the HMRC Self Assessment contact number free to call?

No, the HMRC Self Assessment contact number is not free to call, but it is charged at the standard rate. Calls to 0300 numbers cost the same as calling an 01 or 02 landline number and are included in most mobile and landline inclusive minute plans.

Is the Self Assessment helpline open on bank holidays?

No, the phone line closes entirely on bank holidays. HMRC occasionally extends webchat and phone hours around the 31 January filing deadline if it falls on a weekend, but this is confirmed separately each year rather than being a standing rule.

What if a query is actually about State Pension?

Self Assessment advisers cannot access State Pension records, since these are held by the Department for Work and Pensions. Readers dealing with an HMRC state pension tool error should contact DWP directly rather than HMRC’s Self Assessment line.

What is needed before calling HMRC?

A Unique Taxpayer Reference and National Insurance number should be ready, along with details of the tax year in question. HMRC’s security check cannot proceed without both, and calls that reach an adviser without them are usually asked to call back once the details are available.

Why does HMRC send letters about savings interest?

Banks and building societies report interest earned on savings directly to HMRC each year. If this pushes total income above a personal allowance threshold, HMRC issues a notice automatically, covered in detail in HMRC notices for UK pensioners savings, and it does not require a Self Assessment call to resolve on its own.

Disclaimer: This article is for informational purposes only; for official support, please visit GOV.UK directly.