How much does a Marketing Agency charge for Fb Ads?

[vk_lord]

We are staring a Marketing Agency. So, here is the dilemma.

Some agencies charge against budget say $50 for $1000. And others charge at a percentage say 5% for each campaign no matter how big or small. What should be the best option for us here?

We have clients already and we have charged them as per our work since the beginning. Say, good $1000 which they got almost $1500 in return we charged them around $80 - $100 by negotiations.

You are a company now. Don't take low budget clients unless you have to. They can be drag if you are charging them via percentage.