This term refers to the minimum amount that an account owner must deposit into a 529 plan, either initially (when first opening the plan) or when making subsequent contributions. In most cases, the minimum contribution for a 529 plan is very small – generally no more than $50 – and a number of plans have no minimum whatsoever. However, a few plans carry minimum initial contributions in the thousands of dollars, so be sure to check this particular detail when considering a new 529 plan.