ya472 is completely wrong. If an electrician quotes $5-10,000, I suggest you grab your nearest knife and chase him out of the house. Seriously, it depends on a few things. 1) You need a GFCI breaker. This is REQUIRED, otherwise it wouldn't meet code and it would be a dangerous situation, since the breaker would not shut off if voltage entered the water. A GFCI breaker would cost you $75-150. 2) The electrician would also probably have to run 25-50 feet of wire. This alone could cost $50-75 for the wire. 3) Other incidentals, like junction boxes would probably add up to $10-15. 4) Now, this is the number that varies: labor. I would say the minimum for labor would be $150 if everything goes to plan and the hot tub is not too far from the breaker box. However, if there are complications and/or the electrician has to run a lot of wire, it could go up to $400-450. Add it all up, and expect to pay a minimum of $250 and a maximum of $600. If the number sounds too high for you, consider getting another estimate. Most electricians don't charge for them. Hope this helps.