JD Group, which sells beds, sofas and electronic equipment to mass-market customers who often buy on credit, said that the headline loss per share totalled 59.1 cents in the six months to December 31, against earnings per share (EPS) of 234.4c a year earlier.
Headline EPS, 's main profit gauge, strips out certain one-off and non-trading items.
The company, majority-owned by -focused furniture maker [JSE:SHF], said it would not pay a first-half dividend because of the poor performance.
JD Group increased bad-debt provisions to R1.6bn from R966m in June last year.
South African consumers have been squeezed by inflation and higher petrol prices in particular, caused by the weakness of the rand, with nearly 50% of borrowers failing to pay loan instalments for at least three straight months last year.
"Customers are facing continued pressure on disposable income due to increased living costs and higher debt-to-income levels, impacting spending on furniture and household goods," JD Group said in a statement.
Sales edged up 4% to R17.1bn.