What Number Is 0300 200 3300?

0300 200 3300 is HMRC's Income Tax helpline

If you've come across the number 0300 200 3300 on a letter, a gov.uk page, or a tax-related Google search — it's the main phone number for HM Revenue & Customs (HMRC) Income Tax queries in the UK.

This is the line you call for things like:

Questions about your tax code
PAYE queries (Pay As You Earn — the system that deducts tax from your salary)
National Insurance number issues
Problems with tax refunds
Reporting a change of circumstances that affects your tax

It's one of the most dialled government numbers in the UK, and consequently one of the hardest to get through on.

What are 0300 numbers?

0300 numbers are a specific type of UK phone number introduced by Ofcom for public-sector and non-profit organisations. They're designed as an alternative to 0800 (freephone) and 0845/0870 (revenue-sharing) numbers.

The key characteristics:

They cost the same as calling a standard UK landline (01/02 number). If your phone plan includes inclusive minutes to UK landlines, 0300 calls are included too.
Organisations can't make a profit from 0300 calls. Unlike old 0845 numbers, there's no revenue-sharing.
They work from mobile and landline phones within the UK at standard rates.

The "shared cost" label is slightly misleading — the caller doesn't pay more than a local call, but it's not free either. The organisation receiving the call pays a portion of the cost.

Opening hours

The 0300 200 3300 Income Tax line is typically open:

Monday to Friday: 8am to 6pm (UK time)
Closed on weekends and bank holidays

These hours shift occasionally, especially around the Self Assessment deadline in January. HMRC sometimes extends hours during peak periods — check gov.uk for the latest.

Realistically, "open" doesn't mean you'll get through quickly. Wait times during busy periods can run 30-60 minutes. The best times to call are right at 8am when the lines open, or after 2pm when the lunch-hour rush subsides. Midweek (Wednesday/Thursday) is generally quieter than Monday.

What you can and can't do through this line

This line handles:

Income Tax queries
Tax code explanations and corrections
PAYE issues (underpayment, overpayment)
National Insurance number queries
Simple repayment claims

This line does NOT handle:

Self Assessment — that's 0300 200 3310
Tax Credits — that's 0345 300 3900
VAT — that's 0300 200 3700
Child Benefit — that's 0300 200 3100

Calling the wrong number means being transferred (if you're lucky) or told to hang up and dial a different line (more likely). Check which helpline matches your query before dialling.

Calling 0300 200 3300 from outside the UK

This is where it gets inconvenient. From within the UK, calling 0300 200 3300 is straightforward and costs the same as a local call. From abroad, it's a different story.

The international format is: +44 300 200 3300

Drop the leading 0 and replace it with the UK country code (+44). Your carrier will treat this as a standard international call to the UK and bill you at whatever their UK rate is. There's no special exemption for 0300 numbers — from outside the country, it's just another UK number.

If you're calling from a mobile with roaming enabled, the cost adds up fast. A 30-minute hold followed by a 10-minute conversation at international roaming rates can easily run £15-25.

Browser-based VoIP avoids this. You call over Wi-Fi at VoIP rates instead of mobile roaming rates. With DialVia, you select United Kingdom, type 300 200 3300, and you're connected — no country code to remember, no app to install. It's a practical option when you know you'll be on hold for a while.

Before you call: have this ready

HMRC will verify your identity before discussing anything. You'll need:

Your National Insurance number
Your full name (as HMRC has it)
Your date of birth
Your current address (or the last address HMRC has on file)
Any reference numbers from letters HMRC sent you

Without these, the call is wasted. The agent will ask you to call back with the correct details — and that means another queue.

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