Figures from the Department of Finance show that the amount taken in in tax in January was €3.665bn, up 17% compared with January last year.
This is partly due to an extra €250m in Corporation tax receipts, which were due to be collected in December but were not collected until January.
Income tax was also up 27.7% year-on-year, partly due to the imposition of the USC charge.
A breakdown of the tax figures showed that €1.725bn VAT was taken in, up 3% from a year earlier.
Excise duty was up 2.7%.
On the expenditure side the big headache, predictably, was the cost of servicing the swollen national debt. Interest payments in January were €769m.
In a statement, the Finance Department said the figures were broadly consistent with expectations.
The exchequer deficit in January was €394m, this compares to €483m in January of last year.
