"Petrol subsidy will remain up to mid-2023 based on the 18-month extension announced early 2022," Ahmed said.
Africa's biggest economy spent 2.91 trillion naira ($7 billion) towards a petrol subsidy between January and September 2022, state-owned firm NNPC said, a cost the government has blamed for dwindling public finances.
President Muhammadu Buhari signed tyhe 2023 budget of 21.83 trillion naira ($49 billion) into law on Tuesday after lawmakers increased its amount by 6.4% and raised the oil price predication on which the budget is based.
Buhari said in October that the country would stop the petrol subsidy in 2023, when he steps down after Nigerians vote for a new leader in February.
Successive governments in Nigeria have tried and failed to remove or cut the subsidy, a politically sensitive issue in the country of 200 million people.
Inefficient use of resources is constraining Nigeria's development goals, the World Bank has said, urging the country to remove subsidies on petrol, electricity and foreign exchange that mostly benefit wealthy households.