Ireland Calculator Methodology
Rule version IE-2026-v1, effective 1 January 2026 – 31 December 2026, last reviewed 8 October 2026.
Supported production scope
The 2026 Ireland release calculates common PAYE employment, standard or qualifying reduced USC, employee PRSI Class A, ordinary-asset CGT, basic CAT, VAT arithmetic, core company rates and LPT. Results outside those subsets are marked partial or unsupported instead of being guessed.
Effective dates and payroll timing
CGT and CAT use the supplied transaction date. PRSI uses the pay date and applies the rate change from 1 October 2026. Annual take-home is a pay-date projection, not a Revenue Payroll Notification simulation.
Rounding and validation
Material money components are rounded to cents. Non-negative inputs and calendar-year dates are validated before a result is returned. API validation failures use HTTP 422.
Privacy and limitations
Interactive estimates run in your browser and do not require an account. Specialist reliefs, exact payroll/RPN processing and unsupported asset or employment classifications require official or professional review.