The Metropolitan Opera, whose financial struggles led it to cut the pay of its orchestra, chorus, stagehands and other workers last summer after a labor battle, said Wednesday that it was also asking its solo singers voluntarily to lower their fees, including some of opera’s biggest stars.

The Met’s general manager, Peter Gelb, sent a letter on Wednesday to its soloists asking them to cut their pay by up to 7 percent to match the reductions that the Met’s chorus and orchestra agreed to — or to make a tax-deductible contribution to the company of an equivalent amount. He wrote that some of the Met’s most popular stars had already volunteered to accept the cuts, including Anna Netrebko, Joyce DiDonato, Plácido Domingo and Renée Fleming.

“I hope you will join your colleagues in helping the Met stay strong in the coming seasons,” Mr. Gelb wrote in the letter, which is being sent to singers, conductors, directors, designers and choreographers. “However, whatever you ultimately decide, the decision is entirely yours to make.”

He added, “I want to assure you that whatever your decision it will have no bearing whatsoever on your future work at the Met, since all casting decisions will be made solely on the basis of our artistic judgment.”