Ireland: tax credits, USC and PRSI
Ireland taxes at just two rates, 20% and 40%, but the rate is only half the story. What makes an Irish payslip different is that reliefs arrive as tax credits subtracted from the tax due rather than as an allowance subtracted from income. A credit is therefore worth exactly the same to everybody: the €2,000 personal credit and €2,000 employee credit take €4,000 off the bill whether you earn €30,000 or €300,000.
The point at which the 40% rate starts is the standard rate cut-off point: €44,000 for a single person, €48,000 for a one-parent family, and €53,000 for a married couple with one income. A couple with two incomes can move up to €35,000 of band to the higher earner, to a combined maximum of €88,000.
income tax = 20% x (income up to the cut-off)
+ 40% x (income above the cut-off)
- tax creditsOn top of income tax sit two separate charges. The Universal Social Charge runs at 0.5% to €12,012, 2% to €28,700, 3% to €70,044 and 8% above, and it is charged on your gross pay: a pension contribution does not reduce it. USC has a cliff edge worth knowing about, because below the €13,000 exemption limit no USC is due at all, and the moment you pass it your whole income becomes liable rather than just the excess. Medical-card holders and people aged 70 or over pay a reduced maximum of 2% while income stays under €60,000.
PRSI for a Class A employee is charged on all pay once weekly earnings pass €352, softened by a credit of up to €12 a week that tapers away by €424. Nothing is due from age 66. The rate rises from 4.2% to 4.35% on 1 October 2026, so a full calendar year works out at the composite 4.2375%: nine months at 4.2% and three at 4.35%.
Worked example: €50,000, single, Ireland 2026
Income tax: 20% on the first €44,000 = €8,800, plus 40% on the remaining €6,000 = €2,400, giving €11,200 less €4,000 of credits = €7,200.
USC: 0.5% on €12,012 = €60.06; 2% on €16,688 = €333.76; 3% on €21,300 = €639.00. Total
€1,032.82.
PRSI: 4.2375% of €50,000 = €2,118.75.
Take-home: €50,000 − €7,200 − €1,032.82 − €2,118.75 = €39,648.43 a year, €3,304.04 a month.
A pension contribution is the one lever that changes the answer sharply. Relief comes at your marginal rate, so at 40% a €5,000 contribution costs €3,000 of take-home, but USC and PRSI are still charged on the full salary. Relief is capped as a share of pay that rises with age, from 15% under 30 to 40% from 60, on earnings up to €115,000.