Require in the contract that you are not their only client, but lawyer it well. "We only work with contractors with a diverse set of clients as we believe that

Require in the contract that you are not their only client, but lawyer it well. "We only work with contractors with a diverse set of clients as we believe that diversity promotes excellence." In some countries (I think UK is like this), they will actually look at the amount of work a "contracter" does for a client. Do too much (i.e. only work for them) and they (the taxman) treat you as an employee. Doesn't matter what you put in the contract. It's not nearly that simple.