Newly released government spending documents show the Senate is still out $45,940 from the scandal over living expenses and travel claims.
Patrick Brazeau is behind the outstanding balance, a Senate spokeswoman said.
Three senators – Mr. Brazeau, Mike Duffy and Pamela Wallin – were suspended from the Senate last November over their expense claims.
Liberal Mac Harb resigned from the Senate in August, 2013, after paying back $231,000 for ineligible housing and travel expenses.
Ms. Wallin was on the hook for $138,970, while Mr. Duffy's $90,000 tab was covered by Prime Minister Stephen Harper's former chief of staff, Nigel Wright.
Mr. Brazeau's wages were garnisheed before his suspension when he refused to repay more than $48,000.
The Senate notified Mr. Brazeau in July, 2013, it would dock 20 per cent of his pay until he repaid his expenses – with interest.
But the upper chamber only managed to garnish Mr. Brazeau's wages for four months before he was suspended without pay last November.
He faces criminal charges of fraud and breach of trust in connection with his Senate expense claims.
Mr. Duffy faces 31 charges, including fraud, breach of trust and bribery. Mr. Harb faces criminal charges of fraud and breach of trust, while Ms. Wallin has not been charged.
Mr. Brazeau has also been charged with assault and sexual assault in relation to an incident from February, 2013, that got him booted from the Conservative caucus. He was also recently charged with being drunk behind the wheel of a parked car and carrying a knife.