New figures show a poorer-than-expected performance in the 4 big taxes for the government last month.
But the coalition has still collected €365 million more than projected in the first 8 months of the year.
In August excise duty was 19% less than what the Department of Finance had hoped for.
Corporation tax was also lower by 3.5%, VAT was down 2.2% and income tax was down 5.3%.
That is the second month in a row that tax missed targets.
But the €135 million shortfall is masked by better months earlier in the year meaning overall Michael Noonan has taken in €365 million more than he had projected.
But Finance will now monitor the income tax situation closely especially with the self-employed returns later in the year.
Michael Noonan will also be watching spending.
There is no sign in these figures yet of the over-spend in Health and Social Protection being brought under control.
You might also like
href="http://www.newstalk.ie/2012/news/watchdog-to-examine-accountancy-blunder-at-department-of-finance/">Watchdog to examine blunder at Department of Finance
href="http://www.newstalk.ie/2012/news/dept-of-finance-chief-i-need-more-staff/">Dept. of Finance chief: I need more staff
href="http://www.newstalk.ie/2012/news/department-of-finance-responds-to-bank-of-ireland-chiefs-salary/">Finance Department responds to BOI chief salary
/>