Credits against tax

Credits come off income tax only; they can't create a refund on their own or reduce USC or PRSI.

If your credits are more than your income tax, the unused part is lost for that year, unless a credit is specifically refundable. That's why low earners often pay no income tax but still pay USC.

Related terms

Tax credit · Universal Social Charge (USC)

All terms · General information, not tax advice.