Chinese phrase
这不会额外收费吧？ zhè bú huì é wài shōu fèi ba
Meaning
There won't be an extra charge will there?
When to use it
This asks whether an extra fee will be charged. It usually expects the answer to be no and sounds mildly cautious.
Example dialogue
刚才开通了会员，这不会额外收费吧？ gāng cái kāi tōng le huì yuán zhè bú huì é wài shōu fèi ba
I just activated the membership. There won't be an extra charge, right?
不会的，首月有优惠，以后按月收费。 bú huì de shǒu yuè yǒu yōu huì yǐ hòu àn yuè shōu fèi
No, there won't be. The first month is discounted, and there is a monthly charge after that.