The budget for the year to March 2011 was valued at 368.4 billion dollars based on an oil price of 60 dollars a barrel, compared with the 298 billion dollars for the current year.
Ahmadinejad presented the new fiscal plan which was broadcast live on state-television, but he did not reveal any income or expenditure figures.
Without quoting sources, Mehr and ISNA news agencies reported the overall budget was 368.4 billion dollars, of which 30 percent was to be allocated to construction projects.
Mehr said the budget had taken into account an oil price of 60 dollars a barrel for the said period, compared with an average of 37.5 dollars in year to March 2010.
Iran earns 80 percent of its total revenues from oil exports.
Economists have strongly criticised Ahmadinejad for policies they say have created a highly since his first term began in 2005.
The next year's budget is also marked by the start of a major plan to scrap costly subsidies on energy and goods, in turn reducing government expenditure.
Iranian lawmakers have approved Ahmadinejad's plan to scrap the subsidies which directly and indirectly cost the government as much as 100 billion dollars a year.
The lifting of subsidies is to take place in a staged process, and is due to be concluded by the end of the country?s fifth five-year development plan in March 2015.
