Isle of Man Sources and Verification
Source-backed employee estimate for 2026-04-06 to 2027-04-05.
Professional verification
The Isle of Man 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 60,000 a yearEmployee tax profile: Isle of Man resident single employee under pension age | GBP 46,465.36 | GBP 46,465.36 | Matches |
Official sources and monitoring
2 official sources. 2 were checked automatically in the last three weeks, most recently on 2026-10-23. A content change opens a review before any rule is updated.
| Source | Researched | Automated check |
|---|---|---|
| Rates and allowances 2026/27 - single person allowance £17,000, 10% standard rate band £6,500 and 21% higher rateIsle of Man Government Income Tax Division | 2026-10-20 | Checked automaticallyLast checked 2026-10-23 |
| National Insurance rates and thresholds 2026/27Isle of Man Government Income Tax Division | 2026-10-20 | Checked automaticallyLast checked 2026-10-23 |
No detected source change is waiting for review.
Rule version
Version IM-2026-27-v1, approved on 2026-10-20, last validated on 2026-10-20. 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
- Single resident employee under pension age paid equal monthly salaries for the tax year from 6 April 2026 to 5 April 2027.
- Income tax is 10% on the first £6,500 of taxable income and 21% above that, after the £17,000 allowance, which is reduced by £1 for every £2 of income above £100,000.
- Class 1 NI is 11% of monthly pay between £763 and £4,689 and 1% above; the employer pays 12.8% above £763.
Coverage & limitations
Rule version IM-2026-27-v1 · Tax year 2026-27. See sources, monitoring and verification status.
- Joint assessment, single parent, blind and disabled person allowances, deductions and the tax cap election are not included.
- Salary above £1,000,000 is not supported.
- Independent professional verification pending.