We work both with fixed-price and time-and-materials contracts. The particulars of the given project suggest which of them to choose. Sometimes we use the two-phase model, which allows us to do and get paid for first-phase initial work that helps define the project better and then to follow that up with a more accurate, second-phase fixed-price, or time-and-materials agreement.

Usual payment logistics is as follows:

For short projects: 
» 50% in advance; 
» 50% upon delivery.

For mid-range projects: 
» 40% as advance; 
» 40% upon delivery; 
» 20% after customer tests application and approves it is OK (usually he has 1-to-2 weeks for it).

For long-term projects:
» equal monthly payments.

However, we are open to any other reasonable proposals. For example, - little advance payment and then equal payments each week. In this case you can see our current results constantly, and once a week you decide whether our work is still worth paying.