The amount that the GI Bill pays per month depends on the specific GI Bill program that a person is using, as well as their level of enrollment and other factors. For instance, in the Post-9/11 GI program, the average monthly stipend for American veterans is $1,883. For the Montgomery GI Bill pays approximately $2,210 monthly for full-time enrollment. However, depending on what kind of enrollment you have, the rates keep on varying.