hmm that's a good one. I would guess a bit depends on where you live. Some places, I think, will take a titre test in place of the shot. Maybe you could check if your vet will do a titre test for rabies.
So far I've been lucky with my critters, vets and vaccinations. The dog I get done when she's due as she's out in public. My cats haven't been vaccinated since they were young. but then they are strictly indoor. I vaccinated my first cats every time they said they needed to be, I think both went alot earlier than they would have had I known then what I know now!!