Event Fundraiser ROI Calculator

ROI here is net revenue divided by total expenses, expressed as a percentage — a 100% ROI means the net revenue you cleared equals what you spent to run the event, not that you doubled your total revenue. A 200% ROI means net revenue was twice the expense budget, so for every dollar spent, the event netted two dollars beyond that cost.

It subtracts sponsorships and auction/donation revenue from total expenses first, then divides whatever expense gap remains by the ticket price and rounds up to a whole ticket. So it assumes sponsorships and auction revenue are locked in and asks only how many ticket sales are needed to cover the rest — it's most useful while you're still setting a sales target before the event, not as a post-event metric.

ROI compares net revenue to expenses, while cost per dollar raised compares expenses to gross revenue — a different denominator. An event can have a modest ROI percentage while still showing an efficient (low) cost per dollar raised if expenses are small relative to gross revenue but net revenue itself isn't dramatically larger than the expense base; use ROI to judge overall payoff and cost-per-dollar to judge operating efficiency.

No — it treats every dollar of ticket revenue as gross income to the event without splitting out the tax-deductible "donation" portion of a ticket price from the fair-market-value portion (the meal, entertainment, or goods the donor received). That split is required for IRS gift-substantiation letters, so this ROI figure is a planning and reporting tool, not a substitute for your accountant's donation-receipt calculation.