Impaired debt buyer and consumer lender Credit Corp is starting to make a meaningful return from the consumer lending business it launched four years ago. The division's contribution to group earnings jumped six-fold to more than A$6 million in the year to June.Credit Corp made a net profit of $45.9 million for the year to June - an increase of 19.5 per cent over the previous corresponding period.Revenue rose 18.7 per cent to $226.7 million. Return on equity was 23 per cent.Debt ledger purchasing is the company's biggest business. Ledger acquisitions rose 63 per cent to $231.9 million. The company said moderation in price growth facilitated increased market share.The division's revenue rose 11.7 per cent to $173.2 million and earnings rose 11.6 per cent to $62.5 million.Debt collections increased by 12 per cent to $322 million.An important measure for debt buyers is the number of accounts that enter into payment arrangements. Credit Corp's recurring payment arrangement book grew by 12 per cent over the year to $1.2 billion and the number of accounts under payment arrangements rose by 5.7 per cent to 147,000.Those arrangements represented 78 per cent of collections.Credit Corp's other division, credit-impaired consumer lending, increased revenue by 48.7 per cent to $53.5 million and profit grew strongly from $1 million in 2014/15 to $6.1 million in the year to June.The consumer loan book grew by 35 per cent to $135 million.The company stressed that, having exited the small amount credit contract market last year, it had no lending business, such as payday loans and consumer leases that were subject to regulatory review.It also said its rates were "well below" legislated caps.The company said its Wallet Wizard brand, which it launched last year, was becoming well established and it was starting to get a meaningful amount of repeat business.The company's net borrowings grew substantially during the year, from $58.5 million at the end of the 2014/15 financial year to $139.6 million at the end of June.Net debt as a percentage of the carrying value of its assets rose from 24 per cent to 38.4 per cent.It entered into a new bank loan facility in February, with facility limit of $150 million, and has arranged an additional $30 million tranche of senior debt since the end of the financial year.