The marketing budget for sponsorship can vary greatly depending on the size and reach of the sponsored entity, the scope of the sponsorship, the target audience, and the marketing objectives. Generally, it is recommended to allocate a percentage of the overall marketing budget, typically ranging from 5% to 20%. However, the specific amount should be determined based on a thorough analysis of the potential return on investment, the value of the sponsorship opportunity, and the resources available to the sponsor.