For marketing management engagements, you pay for work as it gets completed. Terms are always 30 days because we pay designers and developers on your behalf and often their invoices need to be paid right away. To keep good contractors happy, we need to pay them quickly. Good contractors = good work.
For larger projects and marketing plans, we usually negotiate payment terms or deposits based on the scope of work.
We aim to be as flexible as possible, but we find this arrangement works the best for both parties.