When it comes to spending on social causes, big isn’t necessarily better in India.

A recent study shows that smaller companies (by revenue) are more generous compared to those with higher turnovers.

The report by Crisil Foundation, released on January 20, shows that 53% of the companies with revenue between Rs 100 crore ($14 million) and Rs 500 crore ($73 million) spent 2% or more of their net profit under the corporate social responsibility rule. But only 31% of those with revenue of over Rs 10,000 crore ($1.4 billion) spent 2% or more. Crisil Foundation is a non-profit unit of the credit ratings agency Crisil.

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The Companies Act, 2013 stipulates that all private and public firms in India with a minimum net worth of Rs 500 crore, or a revenue of Rs 1,000 crore and more, or a profit of Rs 5 crore or more, must spend at least 2% of the three-year average net profit on CSR activities.

The analysis found that 1,000 out of the 1,300 Bombay Stock Exchange-listed companies, which qualify under the CSR rule, adhered to the mandate in fiscal 2015. But the average spending was around 1.35% of the profit, lower than the stipulated 2% level.

According to Crisil, these 1,000 companies spent Rs 6,800 crore ($1 billion) in total. If all of them had spent the mandatory 2%, an additional Rs 3,200 crore ($472 million) would have been spent. The study noted that 200 firms had not spent anything or were in the final stages of finalising their CSR strategy.

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Here is the break-up of how much the companies spent, according to Crisil:

“Compliance towards CSR in fiscal 2015 seems to be inversely proportional to the size of the company – those with high turnover were short on the 2% mandatory spending,” Ramraj Pai, president of Crisil Foundation, said in a statement.

One reason for this, the study pointed out, is that companies with very high revenue need time to plan their CSR spending – which would be a significant amount of money because of the 2% clause. These firms are expected to complete their obligations in fiscal 2016.

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Meanwhile, most of the money was spent on education and skills development, with very little going towards sports or technology development. Here’s the break-up of how these firms spent their CSR funds:

Data: Crisil

This article first appeared on Quartz.