Hard-hitting levies from Budget 2011 have pushed the Government's tax take €607 million (£545m) ahead of last year's figures.
Exchequer figures show the country's finances €9.9 billion (£8.9 billion) in the red for the first three months of the year and in line with official expectations.
But with the Universal Social Charge and other reforms the tax take is €108m (£97m) or 1.1% ahead of profile at end-April, the Department of Finance said.
The budget deficit for the same period last year was just under seven billion euro (£6.2 billion) in the first four months of 2010.
The Department said it will continue to monitor the data on tax returns closely and will present a view on the likely outturn for the year in early July.
Officials said that three of the "big four" tax heads - income, corporation and excise duties - outperformed their targets in the first four months of the year.
VAT was €107 million (£97m) or about 3% behind target at the end of April due to a relatively poor performance in February.
Elsewhere, the Department said there had been an earlier than expected payment of receipts from Deposit Interest Retention Tax
Subscribe to Independent Premium to bookmark this article
Want to bookmark your favourite articles and stories to read or reference later? Start your Independent Premium subscription today.
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies