Preliminary Tax is an estimate of your Income Tax, PRSI, and USC for the current tax year. It must be paid by 31 October each year (or mid-November’s extended pay + efile deadline).
To avoid interest, you must pay at least one of the following:
- 90% of the current year’s tax liability.
- 100% of the previous year’s tax liability.
- 105% of the tax due for the year before last (only if paying by direct debit and the year-before-last was not zero).
If you underpay or miss the deadline, interest may apply. Use FastTax.ie calculators to estimate your Preliminary Tax.
