Um most of them ? (in the US it's pretty standard). Projects that are 2 days or less almost always charge 100% after the job is done (basic plumbing, electrical work, handyman projects).
Remodeling projects (anywhere from weeks to maybe a couple months) it's pretty standard to do what happened in the OP (down payment and then payments as the project goes on).
My brothers garage conversion which he just finished was 30% of the money to start, another 30% once the drywall was up, and then the remaining 40% when paint, trim, and outlets where installed.