HMRC P2 Notice Explained: What It Is, Why You Got It and What to Check

If you have received an HMRC P2 notice, it usually means HMRC has issued or updated the tax code used for your pay or pension. Your tax code is the instruction your employer or pension provider uses to work out how much Income Tax to deduct, and HMRC says you can find that code online, in the HMRC app, on your payslip, or on a Tax Code Notice letter.

A P2 notice is often called a Notice of Coding. HMRC’s PAYE manual describes it as a personalised explanation of what makes up your code and the items included in it. In other words, it is HMRC showing you how it has built your tax code, so you can check whether the information it is using still reflects your circumstances.

Receiving a P2 does not automatically mean there is a problem. Many people get one because a new tax year is approaching or because HMRC has updated its records after a change in income, employment, pension income, benefits, allowances, or earlier tax adjustments.

In this guide, we explain what an HMRC P2 notice is, why you might receive one, what the tax code on it means, and what to check if the details do not look right.

What is an HMRC P2 notice?

An HMRC P2 notice is a tax coding notice sent to explain the tax code HMRC wants used for your employment or pension income. HMRC’s internal PAYE guidance says the P2 explains the coding items that make up the code and invites the customer to make contact if a deduction or allowance is no longer relevant. Since October 2015, HMRC has said a P2 can include all live employments and pensions on a single form.

That matters because your tax code affects how much Income Tax is taken from your wages or pension payments throughout the year. If HMRC’s records are broadly accurate, the code should help the right amount of tax be collected through PAYE. If the records are out of date, the code can be wrong too.

A P2 is not the same thing as a tax bill. It is primarily an explanation of how your PAYE code has been worked out. Sometimes it simply confirms a routine change. Sometimes it highlights that HMRC is using an estimate or deduction that you may want to review.

Why HMRC sends a P2 notice

HMRC says tax codes change when you need to pay a different amount of tax, and this usually happens when your income or circumstances change. Common examples listed by GOV.UK include starting a new job, receiving taxable state benefits, getting income from an additional job or pension, changes to savings interest above your allowance, changes to State Pension, starting or stopping benefits from work, claiming Marriage Allowance, claiming tax-relievable expenses, or needing to pay back certain charges or earlier underpaid tax.

A P2 can also arrive after HMRC has been given new information by an employer or pension provider. In that situation, the notice is effectively HMRC’s explanation of the code it has issued in response to the updated records. That is one reason these letters often appear after job changes, benefit changes, or pension changes rather than completely at random.

If you have recently started a new job, there is another common possibility. GOV.UK says that when a new employer does not have the previous income and tax details needed to give you a full code, you may be put on an emergency tax code while HMRC receives the missing information.

What the tax code on a P2 means

HMRC says tax codes are made up of numbers and letters. For most people with one job or one pension, the standard code is 1257L. The numbers show how much tax-free income is being set against that source of income for the year, while the letters indicate the circumstances or rules attached to the code.

HMRC explains that the number in a tax code starts with the Personal Allowance and is then adjusted for other items. These adjustments can include income that has not been taxed elsewhere or deductions for things such as company benefits or other coding adjustments. Once HMRC has arrived at the figure, the final digit is replaced with a letter.

Some of the more common letters and endings people see on or around a P2 notice are fairly easy to interpret once you know the basics:

• L usually means you are entitled to the standard Personal Allowance.
• BR means all income from that job or pension is being taxed at the basic rate, which is often used where someone has more than one job or pension.
• 0T means the Personal Allowance has been used up, or an employer does not yet have the details needed to give a full tax code.
• M1, W1, X or NONCUM point to an emergency tax code, where tax is worked out on the current pay period rather than the year-to-date position.
• K means you have income that is not being taxed elsewhere and it is more than your Personal Allowance.

You do not need to memorise every code meaning from the letter alone. The important thing is whether the code matches your real situation. A P2 is useful because it gives you the chance to see what HMRC has included before too many future payslips are processed using the wrong assumptions.

What to check when a P2 notice arrives

The first thing to check is whether the notice relates to the right source of income. Make sure the employer or pension provider shown is current and that any employment or pension listed still applies to you. HMRC says you will normally have a separate tax code for each employment or pension, so outdated income sources can affect the way the code has been worked out.

Next, look at the income figures, deductions, and allowances HMRC appears to be using. GOV.UK says the quickest way to review this is through the online Income Tax service, where you can check employment details, pensions, estimated taxable income, company benefits and expenses information. If any of those details are wrong or missing, the code may need changing.

It is also worth checking whether the notice reflects any recent life or work changes. If you have started a new job, started or stopped receiving benefits from work, begun drawing a pension, claimed Marriage Allowance, or changed your expense claims, HMRC may have updated your code for that reason. If the P2 does not reflect those changes accurately, the notice has done its job by flagging what needs reviewing.

What to do if the P2 notice looks wrong

If something on the notice looks wrong, HMRC says the quickest route is to sign in to the online service and check the details it holds. From there, you can review your jobs, pensions, estimated taxable income, company benefits and expenses, and update anything that is incorrect or incomplete.

HMRC says that if your tax code needs to change, it will update the code and tell both you and your employer within 15 working days. After that, the new code should normally appear on your next or following monthly payslip, or by your third weekly payslip. If your payslip still does not show the new code after that point, GOV.UK says you should speak to your employer to check they have received it.

If you have only just started a new job, GOV.UK says it can take up to 35 days from your start date for HMRC to receive all the details needed and update the code. That means a brand-new starter code or emergency code is not always a sign that something has gone wrong permanently. In many cases, it is part of the normal process while records catch up.

Does a P2 notice mean you owe more tax?

Not necessarily. A P2 notice simply tells you what code HMRC wants used and how it has been built. Sometimes that will mean more tax is being collected going forward, but it can also reflect routine coding updates, allowance changes, or corrected information that brings deductions closer to the right amount.

That said, HMRC does list underpaid tax as one possible reason for a code change. So if the notice includes a deduction because you were on the wrong tax code previously or because HMRC needs to collect tax through PAYE, that can change the amount taken from future pay or pension payments. The key point is to read the explanation rather than assume every P2 means a problem.

Why this letter matters even if you do nothing else

A P2 is easy to ignore because it can look like an ordinary tax letter, but it is one of the clearest signals of what HMRC currently thinks about your PAYE position. Even if everything is correct, reading it helps you understand why a code has changed. If something is outdated, spotting it early gives you the chance to update the records before the wrong amount of tax keeps being deducted over multiple payslips.

For that reason, the most useful approach is usually a calm one. Read the notice, compare it with your actual income sources and circumstances, and then check the same details online if anything looks unfamiliar. That keeps the process factual and avoids assuming the letter is either a problem or something to ignore.

An HMRC P2 notice is not something to panic about, but it is worth reading carefully. It explains the tax code being used for your pay or pension and gives you a chance to see whether HMRC’s records still match your real circumstances. That is why the letter matters even when it turns out everything is correct.

This article is for general information only and is not tax advice. Tax codes depend on individual circumstances, and HMRC’s own online services and notices should be checked against your current position.