1257L is a common UK tax code linked to the standard personal allowance. It is often used as a default salary calculator assumption.
The number in 1257L relates to the personal allowance divided by 10, and the L usually means a standard allowance. For 2026/27, it is commonly used as a simple starting point, but your own payslip or HMRC record can show a different code.
| Tax/source year | 2026/27 |
|---|---|
| Region | England/Wales/Northern Ireland |
| Tax code basis | 1257L where the page uses PAYE defaults |
| Pension basis | No pension deduction unless this example says otherwise |
| Student loan basis | No student loan unless selected in this example |
| Calculator setting | The answer is more useful when matched to the same tax year, region, tax code, pension and loan settings used in the calculator. |
|---|---|
| Records to compare | Payslips, HMRC records, student-loan notices and pension scheme documents can explain differences. |
| Tax code | HMRC tax-code changes, K codes, BR/D codes, or emergency markers can change PAYE deductions. |
|---|---|
| Cumulative basis | Week 1, Month 1 or non-cumulative payroll can differ from a smooth annual calculator estimate. |
| Pension method | Relief at source, net pay and salary sacrifice can affect taxable pay and take-home pay differently. |
| Payroll timing | Bonus, overtime, arrears, refunds, cut-off dates and corrections can all move a single payslip. |
| Open the salary calculator with editable assumptions | calculator next step |
|---|---|
| Review calculation sources and methodology | source context |
| What is not decided here | PayBreakdown does not decide payroll correctness, lender approval, benefit entitlement or employer compliance, and does not give regulated financial, mortgage, debt, tax, payroll or legal advice. |
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Tax codes compress allowance and adjustment information into a short payroll code. The number is usually linked to the tax-free allowance amount, while the letters tell payroll which broad treatment to apply.
A different code can be normal if HMRC has adjusted the allowance for benefits, other income, previous tax underpayments, a second job, Marriage Allowance or regional treatment.
This is educational guidance on how UK pay and tax work. It does not decide payroll correctness, HMRC treatment, lender approval, benefit entitlement or employment rights, and it is not regulated financial advice. Where a figure matters, check it against your payslip, your HMRC account, or the official guidance linked above.
No. It is a common standard-code starting point, but your own code can change because of benefits, previous tax adjustments, regional prefixes, a second job, pension income or emergency basis.
Use the code shown on your payslip or HMRC record. An S prefix usually indicates Scottish income-tax treatment, but the calculator should match the actual code you are modelling.
No. PayBreakdown can estimate the effect of a code, but it cannot access HMRC or payroll records.
Last updated 2026-08-27. Checked by Sean Elsmore. Rates last checked against GOV.UK on 2026-08-07. Estimates are for planning and should be checked against official records where the decision matters.