How Your Tax is Calculated – Ireland
Irish tax calculation combines income tax (at 20%/40%), USC (at progressive rates), and PRSI (at 4.35%). Understanding how these interact is crucial for tax planning.
How Your Tax is Calculated
Irish tax calculation combines income tax (at 20%/40%), USC (at progressive rates), and PRSI (at 4.35%). Understanding how these interact is crucial for tax planning.
Calculate Gross Income
Sum all income: employment income (salary, bonuses, BIK), self-employment profits, rental income, pension income, investment income (dividends, interest). This is your total income before any deductions.
Apply USC
USC applies to gross income (before tax credits, but after pension contributions). Calculate USC using the progressive bands: 0.5% on first €12,012, 2% on next €16,688 (to €28,700), 3% on next €41,344 (to €70,044), and 8% on balance. If exempt (income ≤€13,000), skip this step.
Calculate PRSI
PRSI at 4.35% (from Oct 2026) on all gross employment income. Exempt if earning ≤€352/week. Self-employed pay 4.35% on business profits (minimum €650). PRSI is separate from income tax and USC.
Determine Income Tax Band
Single: €44,000 at 20%, balance at 40%. Married one earner: €53,000 at 20%, balance at 40%. Married two earners: standard band transferable up to €88,000 combined (max €44,000 per person). Single parent: €48,000 at 20%.
Calculate Income Tax
Apply rates to gross income: multiply income in 20% band by 20%, multiply income in 40% band by 40%. Add together for gross income tax before credits.
Deduct Tax Credits
Subtract total tax credits: Personal (€2,000) + Employee/Earned Income (€2,000) + any others you qualify for (rent, age, dependent, etc.). Credits reduce tax euro-for-euro. Cannot go negative.
Total Tax Liability
Sum of: Income Tax (after credits) + USC + PRSI = total annual tax. For PAYE employees, deducted monthly by employer. Self-employed pay via preliminary tax (Oct 31) and balance (Oct 31 following year).
Example Calculation (€60,000 annual salary - Single PAYE worker)
This assumes full year at October 2026 PRSI rate for simplicity. Actual 2026 calculation would prorate 4.2% and 4.35% rates. Married couples and those with additional credits will pay less tax.
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