The 1246L tax code means HMRC has told your employer to give you £12,460 of tax-free pay this year, which is £110 less than the standard Personal Allowance of £12,570. Multiply the number by ten to get your tax-free amount; the “L” confirms you qualify for the standard allowance category.1GOV.UK. Tax Codes – What Your Tax Code Means Something on your record has trimmed £110 off the usual figure, and it is almost always a small workplace benefit or a modest amount of tax owed from a previous year.
How the Code Is Built
Every PAYE tax code is an instruction to your employer’s payroll. HMRC starts with the full £12,570 Personal Allowance, subtracts anything that needs to be collected through your wages, and turns the result into a code number.1GOV.UK. Tax Codes – What Your Tax Code Means The Personal Allowance itself has been frozen at £12,570 since April 2022 and is set to stay there until at least April 2028.2GOV.UK. Income Tax Personal Allowance and the Basic Rate Limit From 6 April 2026 to 5 April 2028 So the number in your code tells you what the standard figure looks like after HMRC’s adjustments.
The “L” suffix means you get the standard Personal Allowance rate rather than a specialist category. Other letters carry different instructions: BR taxes all income from that job at the basic rate (typical for a second job), and D0 taxes it all at the higher rate.1GOV.UK. Tax Codes – What Your Tax Code Means A Scottish taxpayer with the same allowance would see S1246L, which applies Scottish rates but the same £12,460 tax-free amount.
Why £110 Has Been Taken Off Your Allowance
The gap between 1257L and 1246L is a £110 deduction from your tax-free allowance. In practice, that points to one of two things.
A Small Taxable Benefit From Your Employer
If your employer provides perks such as private medical insurance or a company car, HMRC treats their cash value as taxable income. Your employer reports each benefit on a P11D after the tax year ends, and HMRC adjusts your code so the correct tax comes out of your regular pay.3GOV.UK. Expenses and Benefits for Employers – Reporting and Paying A benefit valued at £110 would move your code from 1257L to 1246L.
A Small Underpayment From a Previous Year
When HMRC finds you underpaid tax in a prior year, they often recover it by reducing your allowance for the next year rather than sending a separate bill. The amount is spread across 12 monthly instalments.4GOV.UK. Tax Overpayments and Underpayments – If You Owe Tax HMRC can collect up to £3,000 this way, provided total deductions don’t exceed 50% of your PAYE income.5GOV.UK. Pay Your Self Assessment Tax Bill – Through Your Tax Code For a basic-rate taxpayer, a £110 reduction in allowance recovers £22 in tax across the year.
What It Isn’t
A Marriage Allowance transfer, by itself, reduces the giver’s code by £1,260, which would produce 1131L rather than 1246L.6UK Parliament. Income Tax Allowances for Married Couples Only a partial-year transfer combined with other adjustments could land you exactly at 1246L, so if you haven’t transferred allowance to a spouse, this isn’t the explanation.
What It Actually Costs You
Your employer spreads the £12,460 evenly across your pay periods. Paid monthly, about £1,038.33 of each month’s pay is tax-free. Paid weekly, roughly £239.62 per week comes out untaxed. Anything above that gets taxed at the rate for that band of income.
The real difference between 1246L and 1257L is small. A basic-rate taxpayer pays about £22 more in tax over the year on 1246L than on 1257L. That’s under £2 a month. If the adjustment reflects a genuine benefit or a real underpayment, the code is doing its job. The question worth asking is whether HMRC is working from accurate information.
How to Check the Calculation
The quickest way to see how your code was built is HMRC’s “Check your Income Tax” service in your Personal Tax Account on GOV.UK.7GOV.UK. Check Your Income Tax for the Current Year It shows every addition and deduction, lets you update your estimated income, and lets you report changes to benefits. If something doesn’t match your circumstances, you can submit corrections directly.
If you can’t use the online service, call the HMRC income tax helpline on 0300 200 3300.8GOV.UK. Income Tax Enquiries After any change, HMRC sends you a P2 Coding Notice explaining the new calculation.9HM Revenue and Customs. PAYE Manual – Coding – P2 Notice of Coding Your employer receives the updated code electronically, and the new deductions usually take effect within one or two pay cycles.
Documents Worth Having in Front of You
Before you query the code, pull these together so you can compare your own figures with HMRC’s:
- Your P60, given to you by your employer after each tax year (by 31 May), summarising your pay and tax for the year.10GOV.UK. Payroll Annual Reporting – Give Employees a P60
- Your P45 from any job you’ve left, showing your pay and tax up to your leaving date.11GOV.UK. Your P45, P60 and P11D Form
- Your P11D, showing the cash value of any taxable benefits your employer provided.3GOV.UK. Expenses and Benefits for Employers – Reporting and Paying
- Your most recent P2 Coding Notice, which is the single clearest document for spotting errors.
Compare the benefit values on your P11D with what appears on your P2. This is where most coding errors live. HMRC often carries forward an estimated benefit value from a previous year, and if the benefit has ended or changed, updating them through the online service or the helpline will correct your code for the rest of the tax year.
Reliefs That Could Push Your Code Back Up
Just as benefits and underpayments pull your code down, certain expenses and reliefs push it back up. Many employees don’t claim them, and an unclaimed relief may be the reason you’re on 1246L instead of 1257L.
Professional Subscriptions
If you pay annual membership fees to an HMRC-approved professional body and the membership is relevant to your job, the fee can be added to your tax-free allowance. HMRC publishes the list of approved organisations. Life memberships and fees paid by your employer don’t qualify.12HM Revenue and Customs. List of Approved Professional Organisations and Learned Societies
Uniforms, Work Clothing, and Tools
Employees who maintain or replace work uniforms, protective clothing, or tools can claim flat-rate relief without keeping receipts. The default is £60 a year, but many industries have higher figures: £125 for nurses and healthcare assistants, £185 for ambulance staff, £720 for airline cabin crew. If your employer already reimburses these costs in full, no relief is available.13GOV.UK. Check How Much Tax Relief You Can Claim for Uniforms, Work Clothing and Tools
Both reliefs raise your tax-free allowance, which raises the number in your code. If you’re on 1246L and you successfully claim £110 in either category, your code goes back to 1257L.
Not the Same as an Emergency Tax Code
1246L is a normal cumulative code, not an emergency one. Emergency codes apply when a new employer doesn’t yet have your previous pay and tax details, and they carry the suffix W1, M1, or X (or show “NONCUM” on your payslip). Those suffixes tell your employer to work out each pay period in isolation rather than across the year, which often means overtaxing in the first months of a new job. Handing over a P45 fixes it quickly, and any overpaid tax comes back through later pay or directly from HMRC.14GOV.UK. Emergency Tax Codes If your code reads plainly as 1246L with no W1, M1, or X after it, you’re on a normal code with a small adjustment, not an emergency one.