A 1190L tax code means HMRC has set your tax-free personal allowance for the year at £11,900 instead of the standard £12,570. In other words, £670 of income that would normally be tax-free is now taxable, which costs a basic rate taxpayer about £134 over the year. The code itself is not usually a mistake, but it does mean HMRC has identified something on your record, most often a workplace benefit, an unpaid tax balance from a previous year, or another adjustment, that eats into your allowance.
Reading the Code
The number in a PAYE tax code is your annual tax-free allowance with the last digit removed. So 1257 stands for £12,570 (the standard personal allowance frozen at that level until at least April 2028) and 1190 stands for £11,900.1GOV.UK. Income Tax Rates and Allowances for Current and Previous Tax Years The “L” suffix simply means you are entitled to the standard personal allowance.2GOV.UK. What Your Tax Code Means
Whenever HMRC changes your code, they send you a coding notice, sometimes called a P2, which itemises every addition and deduction applied to your allowance. That document is where you find the specific reason for the £670 reduction. If you cannot find yours, the same breakdown is available through your online Personal Tax Account.
Why HMRC Has Reduced Your Allowance by £670
A £670 cut is a relatively small adjustment, and a handful of situations tend to produce it.
A Benefit in Kind From Your Employer
Non-cash perks like private medical insurance, a gym membership, or a small company car all have a taxable value. Your employer reports that value to HMRC, and HMRC reduces your personal allowance so the tax comes out of your wages automatically.3Low Incomes Tax Reform Group. Paying Tax on Employment Benefits A private medical policy costing around £670 a year produces exactly this code. Your employer reports the figures on a P11D at the end of each tax year.4GOV.UK. Expenses and Benefits for Employers: Reporting and Paying
One thing to watch. If your employer already “payrolls” your benefits, the tax is deducted from each pay packet directly and your code should not also be reduced for the same benefit. Duplication of this kind is the most common error worth catching.
Underpaid Tax From a Previous Year
If you underpaid tax in an earlier year by a small amount, HMRC often collects the shortfall by spreading it across the current year’s wages rather than asking for a lump sum. A prior-year underpayment of £670 shifts your code from 1257L to 1190L.3Low Incomes Tax Reform Group. Paying Tax on Employment Benefits The coding notice will show this as a line labelled something like “underpayment for 2024/25.” Once the balance is cleared, your code should return to 1257L the following April.
State Pension Alongside Other Income
The state pension is paid without tax deducted at source. If you receive it alongside employment or a private pension, HMRC collects the tax due on it by reducing your PAYE code on your other income.5Low Incomes Tax Reform Group. How Tax Is Collected on the State Pension For someone on a partial state pension, or someone who started drawing it partway through the year, £670 is a plausible reduction.
High Income Child Benefit Charge
Since October 2025, HMRC has offered the option to collect the High Income Child Benefit Charge through your PAYE code rather than through a Self Assessment return.6Low Incomes Tax Reform Group. A New Way to Pay the High Income Child Benefit Charge If you opted in and the charge works out to around £670, that would explain the code.
What It Costs You
The practical effect of 1190L compared to 1257L is simple. £670 that would otherwise be tax-free is now taxable. For a basic rate (20%) taxpayer, that is £134 per year, or about £11.17 a month. For a higher rate (40%) taxpayer, it is £268 per year, or roughly £22.33 a month.1GOV.UK. Income Tax Rates and Allowances for Current and Previous Tax Years
National Insurance uses its own thresholds and is not affected by your tax code.7GOV.UK. Rates and Allowances: National Insurance Contributions Student loan repayments are also unaffected, because they run on their own income thresholds.
Scottish Taxpayers
If you live in Scotland, your code will start with an “S” prefix (S1190L) and Scottish income tax rates apply.8mygov.scot. Tax Codes Scotland uses six bands ranging from 19% to 48%.9mygov.scot. Scottish Income Tax For most Scottish employees, the lost £670 falls in a band taxed at 19% or 20%, so the cost is similar. If it sits in a higher Scottish band, the annual hit is larger.
Checking Whether the Code Is Right
Before contacting HMRC, take a few minutes to work through three documents.
- Coding notice (P2). Look for the specific line that reduced your allowance by £670. If it names a benefit you still receive or a tax debt you genuinely owe, the code is probably correct.
- Payslip. Confirm the code shown is 1190L. If your employer is already payrolling a benefit, the benefit should appear on the payslip, and your code should not also be reduced for it.
- P11D. This shows the taxable value of every benefit your employer provided during the year. A benefit that ended last year but still appears on your coding notice is a clear reason to request a change.
Fixing It
The fastest route is the “Check your Income Tax” service on GOV.UK, reachable through your Personal Tax Account or the HMRC app.10GOV.UK. Check Your Income Tax for the Current Year Once logged in, you can review your employment details, estimated income, and the benefits HMRC has on file, and update anything that is out of date. You can also claim tax relief on work expenses like a flat-rate deduction for uniforms or professional subscriptions, which increases your allowance.11GOV.UK. Check How Much Tax Relief You Can Claim for Uniforms, Work Clothing and Tools
If your code needs to change, HMRC will send the new code to you and your employer within 15 working days. Monthly-paid employees usually see the updated code on the next or the following payslip. Weekly-paid employees should see it by the third payslip after the change.12GOV.UK. If You Think Your Tax Code Is Wrong
To speak with someone instead, the HMRC income tax helpline is 0300 200 3300, Monday to Friday, 8am to 6pm, closed on bank holidays.13GOV.UK. Income Tax: Enquiries Have your National Insurance number, a recent payslip, and the coding notice to hand. If the reduction relates to a benefit, knowing the exact taxable value from your P11D will speed things up.
If you have just started a new job, HMRC asks you to wait 35 days before contacting them, because your new employer’s payroll data needs time to feed through.12GOV.UK. If You Think Your Tax Code Is Wrong Calling earlier usually just gets you told to wait.
Getting a Refund If You Have Overpaid
If the code was wrong and you paid too much tax, HMRC arranges the refund once the code is corrected. When HMRC update your code mid-year, they check your cumulative income and tax paid, calculate the difference, and tell your employer to refund the overpayment through your next pay.14GOV.UK. Tax Codes: If You’ve Paid Too Much or Too Little Tax You do not need to apply separately.
After the tax year ends, HMRC reconciles your records using data from your employer and pension providers. If an overpayment shows up then, they write to you explaining how to claim. The deadline that matters is four years from the end of the tax year in which you overpaid.15Low Incomes Tax Reform Group. Tax Refunds After that, the year is closed and the refund is lost. For the 2022/23 tax year, for example, the deadline is 5 April 2027.
1190L Is Not an Emergency Code
Emergency tax codes end in W1, M1, or X and behave differently: tax is calculated on each pay period in isolation rather than cumulatively across the year. A plain 1190L is not an emergency code. If you have recently started a new job and are on an emergency code, handing your P45 to your new employer promptly is the single most effective way to get onto the right code, and HMRC will normally correct things within 35 days once they have the data from both employers.16GOV.UK. Emergency Tax Codes