Impôts
Calculateurs de crédit, d'épargne, d'investissement et de planification s'appuyant sur les mathématiques financières standard de l'amortissement, avec hypothèses transparentes et conventions citées.
Tax Calculator
Estimate income tax using US 2025 federal brackets or UK 2025-26 bands. See tax due, after-tax income, and effective rate. Educational reference only.
Capital Gains Tax Calculator
Estimate US capital gains tax on an investment sale. Long-term 2025 brackets (single filer) or short-term at your ordinary rate. Educational only.
VAT Calculator
Add VAT to a net price or remove VAT from a gross price at any rate. Reverse-VAT formula net = gross ÷ (1 + rate), with worked examples.
GST Calculator
Add or remove GST at 5%, 12%, 18% or 28% (India), 10% (Australia) or 15% (New Zealand). Shows the CGST/SGST split for intra-state supplies.