He also said that the state Assembly's winter session, set to begin from Monday, is a "farce" as the Uddhav Thackeray-led government has not completed allocation of portfolios to minsters.
Fadnavis, who is leader of the opposition (LoP) in the Maharashtra Assembly, alleged that the Maharashtra Vikas Aghadi (MVA) government was spreading "misinformation" about the state's financial condition.
He also demanded that the state government disburse Rs 23,000 crore to farmers for waiving their outstanding loans.
The winter session of the state legislature will begin in Nagpur on Monday and conclude on December 21.
Talking to reporters here on Sunday, Fadnavis said the new government came to power over two weeks back but "no official portfolio allocation has been done so far".
"The current allocation of ministerial portfolios is temporary. Therefore, this winter session is nothing but a farce. It seems the Thackeray-led government is not serious about this session," the BJP leader said.
Thackeray, who heads the Maharashtra Vikas Aghadi (MVA) government, took oath as chief minister on November 28 along with six ministers -- two each from the Shiv Sena, NCP and Congress.
On December 12, the Sena was allotted the home, industries and urban development portfolios. The NCP got finance and the Congress got charge of the revenue department.
"Thackeray, and the NCP and Congress earlier demanded disbursement of Rs 23,000 crore. Now it is time for them to implement it," Fadnavis said.
" The Sena had earlier also demanded clearing of 7/12 land record receipts, he said, adding that the Thackeray-led state government should now do it at the earliest.
The previous Fadnavis-led government last year launched an online service to provide authenticated 7/12 land record receipts, a crucial piece of document for establishment of ownership of a piece of land.
The receipt is extensively used by farmers for loan agreements, crop survey and for availing government facilities.
“Earlier Shiv Sena was with us and all the decisions were taken together. Now, the same Shiv Sena is opposing all those decisions and stopping work,” he said.