## Start with three numbers only
Ignore bonus footnotes for a minute. Find gross for the period, total deductions, and net paid. If those three do not reconcile (gross − deductions ≈ net), stop and fix the period (weekly vs monthly vs YTD) before opening any calculator.
## What calculators usually miss
Salary sacrifice, union dues, court orders, benefits in kind, and mid-year tax code changes rarely sit in a simple progressive model. Treat Net salary as a baseline, then add those lines from the payslip by hand.
## A 10-minute check that actually helps
1) Enter payslip gross into Net salary. 2) Compare tax + social to Payroll deductions and Income tax. 3) If the gap is >2–3%, list the missing lines — do not “force” the model to match by inventing rates. Educational only for Ireland.
---
Note: Educational content from Calcly Ireland. Official sources (Revenue — PAYE simplified; USC bands collapsed.) and licensed professionals take priority in Ireland.