United Kingdom Sources and Verification
Source-backed employee estimate for 2026-04-06 to 2027-04-05. Reference table: England; choose your actual jurisdiction below.
Professional verification
The United Kingdom calculator has not yet been reviewed by an independent tax professional. Until it is, results rely on the official sources, worked examples and automated checks below. How our verification works.
Worked examples, recalculated live
Each example was worked by hand from the official rules before publication. The live calculator must reproduce it exactly, to the cent, or the rule set cannot be published.
| Example | Expected take-home | Live result | Status |
|---|---|---|---|
| GBP 65,000 a yearUK tax residence: England | GBP 48,258.04 | GBP 48,258.04 | Matches |
Official sources and monitoring
9 official sources. 5 were checked automatically in the last three weeks, most recently on 2026-10-16. A content change opens a review before any rule is updated.
| Source | Researched | Automated check |
|---|---|---|
| Employer rates and thresholds 2026–27HM Revenue & Customs | 2026-10-16 | Checked automaticallyLast checked 2026-10-16 |
| Income tax rates and Personal AllowanceHM Revenue & Customs | 2026-10-16 | Checked automaticallyLast checked 2026-10-16 |
| Student and postgraduate loan deduction tables 2026–27HM Revenue & Customs | 2026-10-16 | Checked automaticallyLast checked 2026-10-16 |
| Tax relief on pension contributionsHM Revenue & Customs | 2026-10-16 | Checked automaticallyLast checked 2026-10-16 |
| Pension scheme allowances and limitsHM Revenue & Customs | 2026-10-16 | Checked automaticallyLast checked 2026-10-16 |
| Tax on your private pension - annual allowanceGOV.UK | 2026-10-19 | First automated check pending |
| Marriage AllowanceGOV.UK | 2026-10-19 | First automated check pending |
| Individual Savings Accounts (ISAs)GOV.UK | 2026-10-19 | First automated check pending |
| Tax-Free ChildcareGOV.UK | 2026-10-19 | First automated check pending |
No detected source change is waiting for review.
Rule version
Version GB-2026-27-v1, approved on 2026-10-16, last validated on 2026-10-16. Rules are effective from 2026-04-06 to 2027-04-05. Published rule versions cannot be edited; corrections are released as a new version.
Calculation assumptions
- UK resident, age 21 to 64, ordinary NI category A employee throughout the tax year.
- Salary is paid equally across twelve monthly payroll periods. Tax is an annual estimate; NI and loan deductions use monthly thresholds and rounding.
- Standard Personal Allowance only; the selected home nation determines non-savings income-tax rates.
- Any pension entered is a gross employee contribution under a net pay arrangement, not salary sacrifice or relief at source.
- Pension contributions must fit your confirmed available annual allowance including employer contributions; no previous flexible pension access, carry-forward or annual allowance charge is assumed.
- No child benefit, marriage transfer, other income, benefits in kind or nonstandard tax codes.
Coverage & limitations
Rule version GB-2026-27-v1 · Tax year 2026-27. See sources, monitoring and verification status.
- Supported ages 21-64 and NI category A only. Other ages and contribution categories require additional rules.
- Annual income-tax estimate for 6 April 2026 to 5 April 2027; payroll tax-code rounding may differ.
- Monthly NI and student-loan deductions assume equal earnings; irregular pay and part-year work are unsupported.
- Only gross net-pay pension contributions are supported, up to £60,000 and gross income up to £200,000 when contributions are entered, assuming sufficient remaining allowance.
- Salary sacrifice, relief at source, pension annual-allowance charges, child benefit charges and government benefits are not included.
- Employer cost excludes workplace pension, Apprenticeship Levy and employer-level Employment Allowance.
- Loan stop notices, remaining balances and multiple undergraduate loans are not modelled. Independent professional review pending.