The target for September was 38.77 million tonnes (mt), Coal India (CIL) said in a regulatory filing.
The government has set one billion tonne production goal for the PSU by 2020.
The corresponding figure for the current fiscal is 550 million tonnes.
Coal India missed the production target for 2014-15 by 3 per cent, recording an output of 494.23 million tonnes.
It accounts for over 80 per cent of the domestic coal production.