It's only a matter of time before...

Meaning

Something is inevitable and will happen soon.

Examples

• John: Do you think they'll release the new phone soon?
• Alice: Yes, <b>it's only a matter of time before</b> it hits the market.
• John: I can't wait!
• Alice: Me neither! <b>It's only a matter of time before</b> we can all buy one.