How we check our figures
Last updated: October 2026
Every rate, threshold and allowance in our calculators is read from the public body that sets it — never from another calculator or a news summary. Each figure lives in one versioned data file with a note of where and when it was read, and each calculator page shows the same sources and date listed below. Arnold Gold, our Product Manager, reviews each calculator against those sources before it goes live.
Where a row says date not recorded, our data file names the source but not the day it was read, so we don't print one. Those figures are next in line for a dated re-check.
Jump to: United States · United Kingdom · Australia · United Arab Emirates
United States
| Calculator | Sources | Tax year | Last checked |
|---|---|---|---|
| Take-Home Pay & Income Tax Calculator | IRS | 2026 | Oct 12, 2026 |
US federal brackets and limits are set per calendar year, with the IRS usually publishing next year's figures in the autumn. We update when the new year's figures are published.
United Kingdom
| Calculator | Sources | Tax year | Last checked |
|---|---|---|---|
| Salary & Take-Home Pay Calculator | HMRC, Scottish Government | 2026/27 | 2 Sept 2026 |
| Stamp Duty Calculator | HMRC, Revenue Scotland, Welsh Revenue Authority | — | 2 Sept 2026 |
| VAT Calculator | HMRC | — | Date not recorded |
| Dividend Tax & Salary Split Calculator | HMRC | 2026/27 | 25 Sept 2026 |
| Capital Gains Tax Calculator | HMRC | 2026/27 | 25 Sept 2026 |
| Pension Tax Relief Calculator | HMRC | 2026/27 | 25 Sept 2026 |
| Council Tax Calculator | MHCLG | 2026/27 | 25 Sept 2026 |
The UK tax year runs from 6 April to 5 April. We re-check every UK calculator when new rates take effect each April, and whenever HMRC or the devolved governments announce a change.
Australia
| Calculator | Sources | Tax year | Last checked |
|---|---|---|---|
| Stamp Duty Calculator | Revenue NSW, State Revenue Office Victoria, Queensland Revenue Office, RevenueSA, RevenueWA, State Revenue Office of Tasmania, ACT Revenue Office | — | 10 Sept 2026 |
| Income Tax & Take-Home Pay Calculator | ATO | 2026–27 | 25 Sept 2026 |
| GST Calculator | ATO | — | 25 Sept 2026 |
The Australian financial year runs from 1 July to 30 June. We re-check income tax, GST and the state duty tables for each new financial year, and when a state revenue office announces a change.
United Arab Emirates
| Calculator | Sources | Tax year | Last checked |
|---|---|---|---|
| Salary Calculator | GPSSA | — | 25 Sep 2026 |
| VAT Calculator | FTA | — | 25 Sep 2026 |
| End of Service Gratuity Calculator | MOHRE | — | 25 Sep 2026 |
| UAE Corporate Tax Calculator | MoF | — | 25 Sep 2026 |
| Mortgage Eligibility Calculator | CBUAE | — | 25 Sep 2026 |
| Dubai Rent Increase Calculator | RERA | — | 25 Sep 2026 |
UAE rules here come from laws, decrees and regulator circulars rather than annual budgets, so we re-check them whenever an amendment or new decision is published — and at least once a year.
What the calculators don't do
They give estimates from the general rules. They don't know your full circumstances — other income, reliefs you're entitled to, or decisions only a tax authority or adviser can make — and they are not financial, tax or legal advice. Each page says what it leaves out.
Spotted an error?
Tell us at hello@toolhose.org with the page and the source you're looking at. We check every report against the official source, fix confirmed errors, and update the page's check date. See also about us.