The government is due to present a formal budget to parliament today and has already raised several taxes.
"Despite the weaker-than-programmed 2009 fiscal performance, the government’s 2010 budget proposal, if carried out, would significantly address past fiscal slippages, mainly through comprehensive tax reforms and sizeable cuts in recurrent spending," Naoyuki Shinohara, IMF's deputy managing director said in a statement.
"At the same time, the budget would allow for much needed reconstruction-related infrastructure investment, while protecting the society’s most vulnerable and addressing the humanitarian needs of those adversely affected by the conflict."
Sri Lanka is recovering from a 30-year war. The government has appointed a tax commission whose recommendations