The company had sold 39,930 units in January 2015, M&M said in a statement.
In the domestic market, its sales went up 9.84 per cent at 40,693 units last month as against 37,045 units in January 2015.
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Exports were up 7.31 per cent at 3,096 units as against 2,885 units in the same period a year ago.
Sales of passenger vehicles, including Scorpio, XUV 500, Xylo, Bolero and Verito, stood at 22,088 units compared with 19,573 units in January 2015, up 12.84 per cent.
Commercial vehicle sales grew 11.11 per cent to 14,385 units last month against 12,946 units in the year-ago period, M&M said.
"We are happy to have achieved a growth rate of 10 per cent during January 2016 which has been possible due to the demand of our products, especially the new KUV100 and TUV300... We are also happy to see good growth in MHCV & export performances," M&M Chief Executive (automotive division) Pravin Shah said.