salary-calc

Client-side salary and tax calculator

Language
TypeScript
License
Proprietary
Category
Web App
Open App

A salary and tax calculator that shows where your money goes — taxes, pension, medical, employer costs — across every timeframe. Ten countries with 96 jurisdictions between them, and historical tax data back to 2010. Enter whatever your payslip actually gives you and it works backwards from there. Everything runs in the browser, with no data stored or transmitted.

Features

01

96 jurisdictions across 10 countries — UK (England, Scotland, Wales, Northern Ireland), Ireland, USA (federal + all 50 states + DC + New York City), Canada (federal + 13 provinces and territories), Spain (national + 17 autonomous communities), Australia, New Zealand, France, Germany, Japan

02

A country is only offered on its own where that is a real answer — the UK and Spain keep their rates in their nations and regions, so there is no "Other / United Kingdom" computing a payslip nobody receives

03

Historical tax data from 2010 onwards

04

Flexible input — enter any combination of payslip data (gross, net, deductions)

05

Comprehensive breakdowns — taxes, pension, medical, employer costs across multiple timeframes

06

What-if comparison — multiple parallel scenarios side-by-side or as a comparison table

07

Timeline mode — cumulative PAYE computation across the tax year

08

Bookmarkable URLs — every input serialized into the URL, so a scenario is shareable and savable as a link

09

Share a calculation, and export the timeline for a spreadsheet

10

Works on a phone — the multi-scenario and timeline views survive a small screen rather than assuming a desktop

11

Offline DuckDB data pipeline compiles tax rules into static JSON bundles

12

Fully client-side — no server, no accounts, no tracking