[joseacta]

1. The contract should specifically say what was the agreement between you and the client. The key word here is specifically. I've found, that the more specific the contract, the more easily I can justify what is out-of-scope and generate a change request (more money for the project).

2. If you charge by the hour, you should put that on the contract. If going this route, present to the customer at least every week a status report showing what did you complete on the last week, what hours did you spend and have it sign by them. How often do you invoice is part on what agreement you reach with the client, but generally is once a month. Put that on the contract also.

3. Everything should be written in the contract.

4. Hire the CPA. You're good at programming and CPAs are good at tax and accounting. At the end, you'll save big bucks.

Also, if possible, try to incorporate, and can't say what's the best structure for you, but you can expense business related things (like laptop or software) that will help you when you report your taxes.