Is it correct grammar to use 'would it be' in future tense?

'Would' implies a sort-of hypothetical; something like an 'if; then' statement. For example, "If I didn't have any money, what would I do?"

So 'would it be' can work as future tense or as present tense, as long as there is something like a hypothetical in the statement being made. For example, "Would it be fine with you if I went to the shops tomorrow?" is a sort-of hypothetical future tense statement, while "Would it be fine with you if I was jumping now?" is a sort-of hypothetical present tense statement.

It can work as future tense, but not quite as most future tense things do, so I'd need to know the sentence it's in to answer for sure.