The company had posted net profit of Rs 423.77 crore in the April-June quarter of last fiscal.
Sales were down 9.98 per cent to 2,66,343 units, from 2,95,896 units in the year-ago period as the auto market continued to reel under demand slump.
In value terms, MSI said Q1 net sales were Rs 9,995.12 crore as against Rs 10,529.24 crore in the same period a year ago, down 5 per cent.
Besides, MSI said the increase in net profit was also due to focussed cost reduction efforts undertaken by it and the benefit from merger of Suzuki Powertrain India Ltd (SPIL) with the company in the 2012-13 fiscal.
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Addressing analysts, MSI Chief Financial Officer Ajay Seth said: "Rupee depreciation has helped in higher export realisations."
The company however did not quantify the forex gains.
Stating that it was a challenging quarter as demand was low, Seth said the company had to increase efforts to woo customers.
Seth said that going forward "there will be significant increase in the discounts offered on cars. We should prepare for that. Discounts of diesels cars have gone up because diesel engine sales are declining and discount on diesel cars is impacting margins".
MSI scrip ended the day at Rs 1,414.20, down 0.12 per cent from the previous close on the BSE.