What this take-home pay calculator includes
In US mode, the calculator estimates 2026 federal income tax after the standard deduction and adds employee Social Security and Medicare withholding. In UK mode, it estimates 2025/26 income tax plus employee Class 1 National Insurance for England, Wales, and Northern Ireland.
That scope makes the tool useful for salary comparisons, household budgeting, and quick pay-planning checks. It does not make it a full payroll engine, because real payslips often include additional deductions and adjustments beyond the baseline taxes modelled here.