About Fiscalance

How the figures are computed

The tax rules are kept as versioned data, not scattered through the code. Each market has a rule set for the tax year it models — its rates, brackets, ceilings and thresholds — with the date it was last checked against primary sources.

The optimizer and every free calculator run on that same engine, so a figure is the same wherever you meet it: on a calculator page, in a widget embedded on another site, or in your report. Each result states the tax year and the verification date it was computed under.

Where the rules come from

Every rule is sourced, and the source is named: the official publication where there is one — legislation, the tax administration, the social-security body — and otherwise the published guidance of accountancy firms and social-security funds. Each lever in a report prints its source and tax year beside its figure. Each calculator lists the rates it used with the date they were verified, and marks any figure that is a modelling assumption rather than published law.

When a rule changes, the change is logged with the date it applies from and the source that established it.

What it is not

Fiscalance gives estimates and scenarios, not tax advice. It files nothing on your behalf and has no contact with the tax authorities. Confirm a figure with your accountant before you act on it — the report is built to be handed to them.

Your figures

Without an account, the figures you enter stay in your browser. They reach our server only if you save them to an account, share or email a report, or allow us to record them.