Funds to ISSF programs/projects are provided through sponsorships and donations. Sponsorships are provided by corporate or institutional members, which volunteer to make annual contributions, and receive in exchange certain services like access and use of ISSF studies results or discounts for their employees’ attendance to conferences, seminars, workshop and training events organized by ISSF.

Donations are made by donors and benefactors, which having recognized the importance of ISSF goals for the human progress in space are willing to financially contribute to their achievement on a philanthropic basis. Donors are individuals which donate to ISSF once or without pre-determination of amount and periodicity. Benefactors are individuals, institutions or corporations which make substantial grants to ISSF once or without pre-determination of periodicity.