the standard time frame is to have them finalised within 3 weeks, and payments take two days to reach you, so the hope would be 3weeks, 2 days (working days) and it would be in your bank - worst case scenario

this may not happen if you don't provide everything requested, or complete both the paper form AND the online/over the phone info - in this case, your claim would be deemed not effective - so make sure you do both bits! (if this is second child and you're already getting FTB fortnightly, you only have to submit the paperwork)