Commonwealth Bank's half-year profit jumps to $5.2b

CBA's margins have recovered in a rising interest rate environment, leading to jump in profits. (Morgan Sette/AAP PHOTOS) (AAP)

Commonwealth Bank of Australia has delivered a jump in half-year profit as it benefited from rising interest rates and stronger business lending growth.

The country's biggest lender on Wednesday reported a cash profit of $5.15 billion for the six months to December 31, a 9.0 per cent increase from the year earlier, and in line with analyst estimates.