wouldn't be due till after I serve my term

[Mike Hussey]

Facing court because of his stock fraud, Jordan says to his wife Naomi:

Jordan: But it gets even better, babe. Because if I do decide to cooperate, I might only be looking at four short years, in which case, you know, we could start fresh, maybe sell the house. And any fines that I'd have to pay wouldn't be due till after I serve my term, so we'd still have plenty of money left over, you know?

What does "wouldn't be due till after I serve my term" mean?

Source: The Wolf of Wall Street (a 2013 American biographical black comedy crime film directed by Martin Scorsese and written by Terence Winter)

 

[Rover_KE]

wouldn't need to be paid until I got out of jail

 

[Mike Hussey]

wouldn't be/won't need to be are interchangeable in all context?

 

[emsr2d2]

No. Never assume that any two things are always interchangeable.

 

[Rover_KE]

Are wouldn't be/won't need to be [STRIKE]are[/STRIKE] interchangeable in all contexts?

No. In fact I edited my reply to match the tense of the original and disabuse you of the idea that they are always interchangeable.

Note the correct way to ask your question. We don't just make a declarative statement and stick a question mark at the end.