It depends on a couple of items, how fast the bank is in answering and how fast the agent is in submitting the offfice into the system to get an answer. With my banks, i can get an answer the same day the offer is submitted, most offers are answered within 24 hours while some take 48-72 hours but usually never longer unless there is some circumstances beyond the normal such as a deed issue, a really low offer, damages that need to be considered or the buyer is asking for someone outside of the normal. Now government listings hud, va, fnma and freddie mac do take 7 days on average to hear. you should be able to ask the listing agent what is normal or have your buyer broker ask what is normal for this particular bank. good luck with your offer.