What does the tax code
1249L mean?
1249L means £80 has come off your allowance. HMRC will have explained why in a coding notice, and the most common reason people cannot find the explanation is that they never got it.
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Get the detailed breakdown + free reclaim guideEvery deduction in a tax code has been explained. HMRC does not change a code silently: it issues a P2 coding notice setting out the sum, line by line, before the new code takes effect. So if you are on 1249L and cannot account for the missing £80, the question is usually not "why did HMRC do this" but "where did the letter go".
That distinction matters, because a missing coding notice is a fixable problem in its own right, and it is the reason far larger errors go unnoticed for years.
- 1249L Tax Code
- An ordinary L-suffix code giving £12,490 of tax-free pay for 2026/27, which is £80 below the standard allowance. The L means normal allowance rules apply. The £80 is a deduction set out on the P2 coding notice HMRC issued when the code changed.
What a P2 coding notice is
The P2 is the only document that explains a tax code. Your payslip shows the code. Your P60 shows the code. Neither tells you how it was built. The P2 does, and it is issued whenever HMRC changes your code and generally each spring for the year ahead.
It reads as a simple sum:
| Line | On a 1249L notice |
|---|---|
| Personal Allowance | £12,570 |
| Less: a named deduction | £80 |
| Your total tax-free amount | £12,490 |
| The code sent to your employer | 1249L |
The deduction line carries a description. That description is the entire diagnosis, because it determines whether the figure is an estimate you can correct, a benefit you should have ended, or a debt being recovered on a schedule.
Why you might not have seen it
It went to an old address. The commonest cause by a distance. HMRC writes to the address it holds, and that address is not updated when you move unless you or another government service tells it. Post redirection expires.
It was issued digitally. If you have a Personal Tax Account and have opted into paperless communication, notices go there rather than through the door. A great many people opted in once, years ago, and have never looked since.
It went to a name you no longer use. Marriage, divorce, or a legal name change can leave HMRC writing to a name that gets returned or ignored.
Your employer got it and you did not. HMRC sends the code to your employer separately, as a bare instruction with no explanation. Your employer applies it correctly and has no idea why it changed either, which is why payroll cannot answer this question for you.
That last point is worth stating plainly, because people often ask payroll first. Your employer receives a number, not a reason.
What the £80 costs
| Your marginal rate | Allowance lost | Annual cost | Monthly cost |
|---|---|---|---|
| 20% basic rate | £80 | £16 | £1.33 |
| 40% higher rate | £80 | £32 | £2.67 |
The £80 is the amount of income being brought into charge, not a bill. If the deduction happens to be recovering underpaid tax, HMRC grosses the debt up first, so £80 of allowance collects about £16 of actual debt from a basic rate taxpayer.
Worked example: 1249L on a £31,000 salary
- Gross salary: £31,000
- Subtract the 1249L allowance: £31,000 minus £12,490 = £18,510 of taxable income
- All within the basic rate band, taxed at 20%
- Income tax for the year: £3,702
- Monthly tax-free pay: £12,490 divided by 12 = £1,040.83
On the standard 1257L code the same salary gives £18,430 taxable and £3,686 of tax. The difference is £16 across the year. Income tax only, National Insurance excluded, and an estimate to confirm with HMRC.
How to see the notice you missed
You do not need the letter. The same information is available online and is more current than any piece of paper.
Sign in to your Personal Tax Account at gov.uk/personal-tax-account and open "Check your Income Tax". Two things are there. The breakdown of your current code, showing every addition and deduction in pounds with its description. And your message history, which holds notices issued digitally.
While you are in there, do three housekeeping jobs that prevent the whole problem recurring:
Check the address. If it is wrong, everything else follows from that, including where a repayment cheque would be sent.
Check your communication preference. Decide deliberately whether you want paper or digital, rather than living with a choice made years ago.
Check the employments listed. A job you left that still shows as live is one of the most common causes of a genuinely wrong code, and it is visible on the same screen.
What to do if the notice does not explain it
Occasionally the breakdown genuinely does not account for the difference. Before concluding that HMRC has invented a deduction, rule out the three things that make a code look unexplained when it is not.
An addition and a deduction cancelling. A £400 expenses addition against a £480 benefit deduction nets to exactly £80. Both lines are on the notice, neither is £80, and someone scanning for a single figure will not find one.
A code built for a different year. Notices for the year ahead are issued in the spring alongside notices amending the current year. Two documents arriving within weeks of each other can describe different tax years, and comparing the wrong one to your payslip produces a mismatch that does not exist.
A rounding effect. A code number is your tax-free amount with the final digit dropped, so a deduction of £71 and a deduction of £80 both produce 1249L. Reconciling a code to the exact pound is not possible in either direction.
If none of those applies, ring HMRC rather than guessing. Ask what the deduction is described as and when it was applied, which is enough to establish whether it is an estimate you can correct, a benefit that should have ended, or a debt being recovered.
Why this matters more than £16
An £80 deduction is trivial. The habit of not seeing coding notices is not.
The errors that cost real money, a benefit that ended years ago, an emergency code that never got corrected, a second employment quietly holding part of your allowance, all announce themselves on a P2 first. Someone who reads their notices catches these in the year they arise, when the correction refunds automatically through payroll. Someone who does not catches them years later, when only four years are claimable and the older ones have gone.
So the useful action here is not to argue about the £80. It is to make sure you will see the next notice, whatever it says.
Our guide to checking your tax code covers the five places your code appears and what each document does and does not tell you. If the deduction turns out to be wrong for earlier years as well, our guide to reclaiming overpaid tax covers the four year window, which currently reaches back to 2022/23 and closes for that year on 5 April 2027.
Our free tax code checker will estimate what your code should be for your circumstances, which is a quick way to tell whether the £80 is the whole story. It gives an estimate rather than advice, and HMRC has the final say.
People also ask
- 1249L gives £12,490 of tax-free pay, £80 below the standard allowance, costing about £16 a year
- Every code change is explained on a P2 coding notice before it takes effect
- The commonest reason people cannot explain their code is that the notice went to an old address or a paperless inbox
- Your employer receives the code but not the reason, so payroll cannot answer the question
- The breakdown is always available in your Personal Tax Account, in pounds and with descriptions
- Check your address, your paperless preference and your listed employments while you are there
- The habit of reading notices is worth far more than the £80, because expensive errors appear on a P2 first
Related tax codes: 1248L tax code | 1251L tax code | 1246L tax code | 1257L tax code | How to check your tax code
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