Crate uk_tax 

A Rust library that calculates UK PAYE Income Tax and Class 1 National Insurance contributions with historical tax year support.

Supports historical tax years (2011/12 to 2025/26) and allows custom personal allowances to be specified, if needed.

Modules

it

Income Tax calculation function.

ni

National Insurance calculation function.

tax_years

Definitions of tax years and thresholds.