It varies depending on the funding platform and the specifics of your campaign. Charges may include a platform fee levied as a percentage of total funds raised, potentially 5% to 10% or more. It could be an additional fee when the campaign reaches its funding goal and a payment processing fee per transaction. It is usually a small percentage of each individual investment—around 2% to 3% of the amount invested, plus 20¢ to 30¢ per investment, though this can vary.