The 885L tax code tells your employer or pension provider to give you £8,850 of tax-free pay across the year before deducting income tax. That is £3,720 less than the standard personal allowance of £12,570, so HMRC has identified something in your tax profile that shrinks your tax-free amount. The usual reasons are a taxable work benefit, an unpaid tax bill from a previous year, or other income HMRC needs to tax through your payroll.1GOV.UK. Tax Codes – What Your Tax Code Means
What the Number and Letter Actually Mean
Every PAYE tax code is a number and a letter doing two different jobs. The number is your annual tax-free income with the final digit dropped, so 885 stands for £8,850. Payroll software takes that figure and spreads it evenly across your pay periods. On a monthly payroll, roughly £737.50 of each month’s gross pay comes to you tax-free; on a weekly payroll, it is about £170.19 a week. Everything above that slice is taxed.
The letter L is the plain vanilla suffix. It signals that you qualify for the standard personal allowance and that HMRC has not applied any special category like a marriage allowance transfer or an emergency arrangement. The letter is not what makes your allowance smaller; the number is. So an 885L code is a standard-allowance code with a reduced figure inside it.
Why Your Allowance Has Been Cut by £3,720
The personal allowance for 2026/27 is £12,570 and has been frozen at that level since 2021/22.2GOV.UK. Income Tax Rates and Allowances for Current and Previous Tax Years An 885L code means HMRC has taken £3,720 off that baseline. Three causes account for most cases.
Taxable Benefits From Your Job
Perks like private medical insurance, a company car, or fuel for personal use are taxable. Rather than sending you a separate bill, HMRC often collects the tax by lowering your code to match the value of the benefit.3GOV.UK. Payrolling: Tax Employees’ Benefits and Expenses Through Your Payroll If your employer provides health cover valued at £1,200 and a company car benefit worth £2,520, the combined £3,720 reduction lands you on exactly 885L. Some employers now payroll benefits directly, in which case the tax comes out of each pay packet and your code stays at 1257L.
Underpaid Tax From a Previous Year
If a year-end reconciliation shows you paid too little tax, HMRC can recover it by reducing this year’s code and collecting the shortfall through your payroll. The cap on recovering an underpayment this way is £2,999.99. If you owe £3,000 or more, HMRC has to collect it separately through Self Assessment or a Simple Assessment letter.4GOV.UK. PAYE12070 – Coding Out Underpayments
Other Untaxed Income
Your code can also be reduced to account for income paid without tax deducted at source. Untaxed savings interest, earnings from a second job where the allowance is used elsewhere, and the state pension are common examples; the state pension is taxable but paid gross, so HMRC lowers the code on your other PAYE income to collect the tax. The High Income Child Benefit Charge can be gathered the same way, by trimming the code so the charge is recovered gradually through payroll.1GOV.UK. Tax Codes – What Your Tax Code Means
What 885L Costs You Compared to 1257L
Take someone earning £35,000 a year on an 885L code. Their taxable income is £35,000 minus £8,850, which is £26,150. All of that sits inside the basic rate band, so the annual tax bill is £5,230, or roughly £435.83 a month. On the standard 1257L code, taxable income at the same salary would be £22,430 and the tax would be £4,486. The 885L code therefore costs an extra £744 over the year, which is 20% of the £3,720 reduction.5GOV.UK. Income Tax Rates and Personal Allowances
If the reduction reflects a real benefit or a genuine underpayment, that extra tax is correct. If it reflects a mistake, you are paying £744 a year you shouldn’t be, and the fix is the same regardless of the amount: check the code.
How to Check What’s Behind Your Code
The quickest route is your Personal Tax Account on GOV.UK, or the HMRC app. Both show your current code, the specific deductions HMRC has applied to arrive at £8,850, your estimated income from each job and pension, and the tax you can expect for the year.6GOV.UK. Check Your Income Tax for the Current Year That breakdown is what tells you whether the £3,720 reduction is a company car, a coded-out underpayment, an estimate of savings interest, or something else.
If something is wrong, you can tell HMRC through the same service. Typical corrections are that a taxable benefit has ended, you have changed jobs, or your estimated income differs from what HMRC assumed. Once HMRC updates the code, they issue a new notice to your employer or pension provider. PAYE runs on a cumulative basis, so once the new code is applied your next pay packets automatically balance out any over- or under-deduction from earlier in the year.
Have your most recent payslips or P60 nearby when you check. HMRC’s figures come from what your employer reports through Real Time Information, and those documents are what you’ll need to spot a reporting error.
If You’ve Overpaid or Underpaid
After the tax year ends on 5 April, HMRC reconciles what you paid against what you actually owed and sends a P800 letter if the two don’t match. P800s go out between June and March of the following year.7GOV.UK. Tax Overpayments and Underpayments
If the P800 shows a refund, you need to claim it; HMRC no longer repays every overpayment automatically. You can claim online through your Personal Tax Account or the HMRC app for a bank transfer, using your National Insurance number and the P800 reference, or call HMRC for a cheque. If you think you’ve overpaid but no P800 arrives, contact HMRC to prompt a reconciliation. The time limit for claiming overpaid income tax is four years from the end of the relevant tax year.
If the reconciliation goes the other way and you underpaid, late payment interest applies. As of January 2026 HMRC’s rate on outstanding tax is 7.75%, set at the Bank of England base rate plus 4%.8GOV.UK. HMRC Interest Rates for Late and Early Payments Penalties on top of the tax are unusual for coding errors, because the mistake typically originates in HMRC’s data or an employer’s reporting. Penalties tend to apply only where HMRC can show you knew about untaxed income or a benefit and didn’t report it.