Officials in Detroit say they hope the U.S. Justice Department lets the city use federal grants designed to hire officers to help keep them on the job.
Police Chief Ralph Godbee says layoff notices for 100 officers will go out in about two weeks.
The layoffs are part of the city's plan to cut 1,000 jobs by April to help reduce a deficit of about $200 million in Detroit's general fund. Mayor Dave Bing says the city could run out of cash by April.
Funds remain in two federal grants for new hires. Police officials are seeking a variance to use that money to keep 75 officers on the job for up to three years.
Twenty-five positions scheduled for layoffs are expected to be made up through attrition.