Between 2010 and 2020, the percentage of tax filers giving to charity decreased by 24.7 per cent in Nova Scotia.
Many foundations in Canada will struggle to increase their charitable spending so quickly.
Canadians contributed 0.53 per cent of their household income to registered charities, down from 0.72 per cent.
Private charities generally spend money more wisely and effectively than governments.
Approximately 72,000 Newfoundlanders and Labradorians made charitable contributions, down from 85,600 in 2008.
The rapid decline in giving means charities are increasingly strapped for resources.
Ontario recorded the largest decrease in the percentage of household income donated over the decade.
In this year's Generosity Index, American states dominate the top of the rankings.
From 2004 to 2014, the percentage of Ontario tax-filers donating to charity fell by 18.7 per cent.