Currently being paid $2k to do my TC in a small-mid size firm. Workload is pretty intense, am billing around $8-12k monthly for the firm. Not sure if I’m being lowballed or if $2k is a normal TC rate for small/mid size firms?

Would it be possible to negotiate for a higher allowance (I still have a few more months left in my TC)? Also, curious to know if TC rates are much higher at the bigger firms?