correct?

AnonymousYou don't want to break them. If you did break them, you would have to pay.

As amended.

I don't think you have to pay something for just wanting to break them.

AlpheccaStars AnonymousYou don't want to break them. If you did break them, you would have to pay.As amended. I don't think you have to pay something for just wanting to break them.

Isn't it a imperative, non-hypothetical sentence? Isnt it supposed to be 'wI'll' instead of would? Thank you.

If you break/do break them. you will have to pay for them.
If you broke/did break them. you would have to pay for them.

The first presents the possibility of breaking them as more real than the second.

fivejedjonIf you break/do break them. you will have to pay for them.

That is much more direct and less polite than "would."

If some boisterous, unmannerly boys enter the shop and start goofing off, use "will."

AlpheccaStars fivejedjonIf you break/do break them. you will have to pay for them.That is much more direct and less polite than "would."If some boisterous, unmannerly boys enter the shop and start goofing off, use "will."

So, Use this sentence, 'If you broke them, you would have to pay.' rather than 'if you break them, you would have to pay.' to show politenes

AlpheccaStarsThat is much more direct and less polite than "would."

I see no lack of politeness there.

Perhaps "less confrontational" or "less direct" is a better description than "more polite."
The tone of voice matters, too.