It was USD 3.12 billion during the same month a year ago, RBI data showed today.
In August 2015, the outward foreign direct investment by Indian companies stood at USD 2.19 billion.
Outward foreign direct investment in September, 2015 was in the form of equity, loan and issue of guarantee.
Out of the total USD 1.24 billion invested abroad, USD 137.25 million was invested in equity, USD 365.83 million through loans and USD 738.25 million in the form of issue of guarantee.
Other investors include WNS Global Services in UK (USD 25.48 million) and Zensar Technologies Ltd in the US (USD 20.5 million).