Stock, or existing, photography is valuable to editors and art buyers, because it is a known quantity - and quality - available immediately. An image from a student photojournalist is worth the same as an image that is equally good (and/or appropriate for the use) as an image by a seasoned pro, since the quality can be seen and judged immediately - even though the assignment rates for the two might differ widely.

 Before you can price a product or service, you need to know your costs to provide it. This calculator is one tool to help you get a handle on those costs. It lists annual expenses independent photojournalists need to account for. But it's only as accurate as your inputs, which can be hard to estimate. Err on the high side, since unexpected things can catch up with you, and as you bill more, your expenses almost surely will increase. As high as totals from this calculator may look, experience will probably prove them low.