A 111L tax code means HMRC has cut your tax-free personal allowance for the year down to £1,110, well below the standard £12,570 that comes with the default 1257L code. The letter “L” confirms you still qualify for the standard allowance in principle; the low number tells you HMRC has subtracted something sizeable from it. That something is usually taxable benefits from your employer, tax owed from a previous year, State Pension income, or an allowance split across two jobs. If the deduction is genuine, the code is doing its job. If it isn’t, you’re overpaying tax every month until you fix it.
What the Numbers and Letter Mean
The number in a tax code is your annual tax-free allowance with the final digit removed. 1257L points to £12,570 tax-free; 111L points to £1,110.1GOV.UK. Tax Codes – What Your Tax Code Means Everything you earn above that allowance is taxed at the normal rates through PAYE.
The “L” suffix means you’re entitled to the standard personal allowance, just with adjustments applied to it. So 111L is not a different kind of allowance; it’s the same allowance most people get, with £11,460 knocked off for reasons HMRC records against your record.
Why HMRC Has Given You a 111L Code
HMRC starts every code at £12,570 and subtracts amounts based on your circumstances. A handful of common items, alone or combined, land people at 111L.
Benefits in Kind
Taxable perks like a company car or private medical insurance reduce your allowance by their cash-equivalent value. Your employer reports these each year on a P11D, and HMRC feeds those figures into your code for the following year.2GOV.UK. P11D Benefits totalling around £11,460 will pull a full allowance down to exactly £1,110.
Tax Owed From a Previous Year
If you owe HMRC less than £3,000 from an earlier year, they usually collect it by shrinking this year’s allowance rather than sending you a bill. The debt gets spread across your monthly pay through PAYE.3GOV.UK. Pay Your Self Assessment Tax Bill – Through Your Tax Code Two protections apply: HMRC cannot take more than 50% of your pre-tax pay through a code adjustment, and they won’t apply the adjustment if it would more than double your normal tax.
State Pension Plus Other Income
The full new State Pension is £241.30 a week, roughly £12,548 a year, and it’s paid without tax deducted at source.4GOV.UK. The New State Pension – What You’ll Get HMRC recovers the tax by reducing the allowance on your other income, such as a workplace pension. Because the pension alone eats almost the entire allowance, any further deduction can push what’s left down to 111L quickly.
A Split Allowance Across Two Jobs
Second jobs are normally given a BR code that taxes every pound at 20%.5GOV.UK. How Tax Works If You Have More Than One Job You can, however, ask HMRC to split your personal allowance between the two employments. If most of it stays with your main job and a slice goes to the second, the second job’s code can come out as 111L.
Marriage Allowance Combined With Something Else
Transferring £1,260 of your allowance to a spouse or civil partner through Marriage Allowance drops your code to 1131L on its own.6GOV.UK. Marriage Allowance – How It Works That won’t produce 111L by itself, but stacked with benefits in kind or a prior-year underpayment, it can.
What 111L Costs You Each Month
The gap between 1257L and 111L is £11,460 of extra income exposed to tax. For someone earning £30,000, a 1257L code produces a basic-rate bill of about £3,486 a year (20% of £17,430). On 111L, tax applies to £28,890 of that same salary, giving roughly £5,778. That’s about £2,292 more over the year, or £191 a month. The figures shift once earnings cross the £50,270 higher-rate threshold.7GOV.UK. Income Tax Rates and Personal Allowances
If the deductions behind the code are accurate, you’d owe that tax anyway and the code is simply collecting it evenly. If they’re not, every month on the wrong code is money you’re lending HMRC for free.
How to Check What HMRC Has Deducted
The fastest way to see the working behind your code is the “Check your Income Tax” service on GOV.UK. It shows your current code and lists every item HMRC has subtracted from your allowance.8GOV.UK. Check Your Income Tax for the Current Year You’ll sign in with a Government Gateway account and may need photo ID the first time. Compare each figure against your reality: is the company car still with you? Is the medical insurance value right? Does the “tax owed from earlier years” line match anything you recognise?
Your P2 coding notice, sent by HMRC when your code is set or changed, contains the same breakdown on paper.9HM Revenue and Customs. PAYE Manual – Coding – Codes – How They Are Used and Calculated – P2 Notice of Coding Your current code also appears on every payslip. Keep your latest payslip, last year’s P60, and any P11D within reach if you plan to phone HMRC; your National Insurance number and your employer’s PAYE reference from the payslip will speed the call along.
How to Get the Code Changed
If a deduction is out of date or wrong, report the change through the same online service. HMRC recalculates your allowance, issues a new code, and notifies your employer or pension provider.8GOV.UK. Check Your Income Tax for the Current Year To do it by phone, call the income tax helpline on 0300 200 3300 with your National Insurance number ready. Once HMRC issues the update, your employer should apply the new code on your next monthly pay, or within three weekly pay runs.10GOV.UK. Tax Codes – If You’ve Paid Too Much or Too Little Tax
Don’t wait for HMRC to notice a change on their own. If you’ve handed back a company car, left a job, or your spouse has cancelled a Marriage Allowance transfer, telling HMRC directly stops the overpayment sooner.
Getting Back Tax You’ve Already Overpaid
When HMRC corrects your code partway through the year, they check what you’ve paid so far under the old one. Any overpayment is refunded through your next pay packet as the new code takes effect.10GOV.UK. Tax Codes – If You’ve Paid Too Much or Too Little Tax
After the tax year ends, HMRC reconciles the whole year and sends a P800 letter if you’re owed money. You can claim online through your Personal Tax Account or the HMRC app and see the refund within five working days, or wait about six weeks for a cheque.11GOV.UK. If Your Tax Calculation Letter (P800) Says You’re Due a Refund Sometimes HMRC posts the cheque without needing a claim.
Codes You Might Have Expected Instead
A few nearby codes come up often when people are working out whether 111L is right for them.
- 1257L is the standard code for one job with no adjustments. If you can’t identify a single legitimate deduction, 1257L is what you’d expect to be on.1GOV.UK. Tax Codes – What Your Tax Code Means
- BR, D0, and D1 are flat-rate codes usually used for second jobs, taxing all income from that source at 20%, 40%, and 45% respectively. Seeing 111L on a second job usually means the allowance has been split deliberately.5GOV.UK. How Tax Works If You Have More Than One Job
- K codes apply when your deductions exceed the entire personal allowance, so the code adds taxable income instead of shielding any. Employers still can’t take more than half your pre-tax wages through a K code.12GOV.UK. If You Have a K in Your Tax Code
- W1 or M1 after a code number means HMRC is taxing each pay period on its own rather than cumulatively across the year, common after starting a job without a P45. Emergency codes often lead to overpayment until a cumulative code is issued.
One thing worth flagging: if your deductions have grown since HMRC set the code, a K code might actually be the correct one. A low positive number like 111 says HMRC still thinks you have some allowance left. If your benefits or untaxed income have increased, that assumption may be out of date, and the online breakdown will show it.