It's RIF time again.

General Services Administration yesterday handed out reduction-in-force notices to 810 of its 11,500 people here. Officials estimate that about 325 people will actually be fired. Most of the rest will be bumped out of their jobs and/or demoted.

The National Archives is the hardest hit of the GSA units. About 140 employes will be fired shortly after the 30-day RIF notice alert expires.

GSA also is contemplating putting most of its staffers on furloughs ranging from 14 to 22 days. A decision on who goes, when and for how long, has not been made yet, officials say.

Federal Labor Relations Authority--the small agency that is the highest level of administrative appeal for in-house government labor-management disputes--today will send out RIF notices to six field workers. FLRA, which is down to 302 workers, fired 47 staffers on Jan. 8 for economy reasons.

GSA, FLRA, Treasury, Transportation, Office of Personnel Management and dozens of other agencies are in a serious personnel/financial bind because Congress has not approved budgets for the 1982 fiscal year. It started Oct. 1. Under the stopgap funding measure Congress okayed last month (to finance agency operations through March 31) many agencies were required to take an additional 4 percent cut on top of the 12 percent spending reduction imposed on them earlier by President Reagan.

At this stage of the game, most non-Defense agencies do not know how much money they will have to spend (or cut) for this fiscal year. Some have RIFfed workers and most are contemplating furloughs -- generally of one day every two weeks--to save money. But almost none of them have any idea how deeply they will have to cut salary and expense funds this year and won't until Congress returns and takes up work on their budgets.

Some agencies such as Treasury and Justice hope that Congress will restore funds or give them relief so they can avoid major RIFs that will otherwise have to take place. Justice, for example, has canceled plans to fire 147 deputy U.S. marshals (including 43 in Washington) this month. It believes Congress will give it supplemental funds to meet the cost of the October rank-and-file raise and the January salary increase for executives.

Treasury, facing major cuts unless Congress lets it off the hook, is making plans to furlough workers but is busy on Capitol Hill seeking relief that would allow it to minimize RIFs and furloughs.