U.S. Sen. Rand Paul announced Thursday that he will return to the federal treasury $500,000 of his office budget that was not used.

Paul, a Republican from Bowling Green, is a staunch proponent of federal spending cuts, but he said many of his efforts to reduce spending through legislation have failed to pass Congress.

“This is the one thing I have control over,” Paul said during a news conference at the St. Matthews Community Center on Ten Pin Lane off of Shelbyville Road.

This month, Paul intends to propose legislation that would offer incentives to civil servants, such as bonuses, for doing something similar — leaving a portion of their budgets unspent, he said.