IRS operations spending per $ 100 collected has dropped from $ 0.53 in 2010 to $ 0.34 in 2023.

It cost the Internal Revenue Service 53 cents to collect $100 in 2010, but by 2023 that cost fell to 34 cents, according to USA Facts. In 2023 the IRS’s 82,990 employees collected nearly $4.7 trillion in taxes, up 26% over the previous decade.
 

The IRS spent $16.1 billion on operating expenses; 65% of that was for salaries and benefits, while 35% was for infrastructure, technology, and other operational costs. After adjusting for inflation, IRS operating costs have fluctuated between just under $14 billion to just over $17 billion since the 1990s.