From Longman Dictionary of Contemporary Englishit/that dependsit/that dependsspokenDEPEND/IT DEPENDS used to say that you cannot give a definite answer to something because your answer will be affected by something else ‘How long are you staying?’ ‘I don’t know; it depends.’it depends who/what/how/whether etc You may take several months to reach your target weight – it depends how much you want to lose. → depend
Examples from the Corpus
it/that depends• The arbitrator's decision is also meant to replace the reasons on which it depends.• However, that depends on a future legal decision.• And one that depends on government policies.• Whether they make it depends on how long it takes them to realize and step back.• At these outside shows it depends on the weather.• But second, it depends on what our selective-attention circuits select from all the sensations.• Well, that depends whether you'd rather shield them from such things or prepare them for it. 