The agency maintained India's rating at Baa3 - the lowest level in the investment grade or a notch above "junk" - that carries a higher risk of default by the government.
"Government finances are the weakest aspect of India's macroeconomic profile... We expect the government's fiscal position to remain weaker than peers over the medium term," it said, adding sustained improvement in public finances could result in rating upgrade.
Finance minister P Chidambaram and top financial administrators are preparing the details of the budget for 2013-14 amid a gloomy economic situation and a shaky balance sheet.
Growth has slowed down considerably averaging 5.4% during April to September.
Moody's expects Indian economy to grow by 5.4% in the current fiscal and 6 % in 2013-14.