Three retained fire stations in Nottinghamshire may close as part of cost-cutting measures.
The service must save nearly £5m over two years, about 12% of its budget, due to a lower government grant.
Managers estimate as well as the part-time stations, about 60 officers and 50 support staff, along with six out of 36 engines, may have to be cut.
The proposals will have to go before the fire authority and a consultation carried out, with a decision next year.
The fire service currently has 12 full time and 13 retained fire stations and employs about 1,150 people, 85% in front line roles.
It had been undertaking an efficiency review but managers said the government cuts meant major changes.
Retained fire stations at Collingham, Warsop and Edwinstow could close.
Stations at Highfields, Carlton and Arnold could lose their retained sections.
Chief Fire Officer Frank Swann, said: "So what I think our objective will be, will be to rationalise the delivery without the service diminishing."
He added: "It isn't something we are looking forward to and it is tough to make happen."
The Fire Brigades Union condemned the plans as "ill thought out".
The proposals will go before the fire authority at the beginning of next year, and after a formal consultation, no decision will be made before June 2011.