Every change to the tax rules or the calculation engine, newest first. If a number you saw before has changed, the reason is here.
30 Sept 2026 · Site
Every page now carries its full explanation, worked example and tables in the page itself, calculated by the engine.
Seven guides: the UK £100k tax trap, UK student loans, Scotland vs the rest of the UK, Australian HECS-HELP, the 1 July 2027 Australian tax cut, California and New York.
A chart on every take-home page showing how much you keep of the next 1,000 and of the whole salary as pay rises.
Copy summary (plain text with the link) and a one-page print sheet, including a side-by-side Offer sheet.
An embeddable calculator for other websites (see About).
30 Sept 2026 · Engine 1.0.0
New calculation engine with a sourced rule registry for each country and tax year.
United Kingdom: Scotland, student loan Plans 1, 2, 4, 5 and Postgraduate, three ways of paying a pension, and the High Income Child Benefit Charge.
Australia: 2027–28 (14% rate), low income tax offset, Medicare low-income reduction, Medicare levy surcharge, HELP marginal system, salary sacrifice and package vs base salary.
Canada: federal and Ontario credits, CPP2, Ontario surtax, tax reduction and Health Premium.
United States: 401(k) limits, pre-tax health premiums, California (FTB schedule, SDI, 1% over $1 million) and New York (2026 rates, recapture, New York City, Paid Family Leave).
Offer and Move convert currencies at the ECB reference rate and show the salary that would make two offers equal.
30 Sept 2026 · Registry 0.2.0
Australia: 15% rate from 1 July 2026; HELP repayments under the marginal system.
United Kingdom: Plan 2 threshold £29,385; Plans 1, 4 and 5 added.
Canada: 2026 federal and Ontario brackets, CPP2, 2026 CPP and EI limits.
Offer and Move stopped subtracting amounts in different currencies.
12 Sept 2026 · Registry 0.1.0
First version of KeptOffer.
Coming next
US 2027 federal figures when the IRS publishes them, and California's and New York's 2026 figures when they are released.
More US states and Canadian provinces, each with sourced rules.