Cost per attendee, cost per lead, pipeline, donations, retention. Build the one-page report with the ROI calculator.
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Measuring ROI and reporting.
Cost per attendee, cost per lead, pipeline, donations, retention.
Build the one-page report with the ROI calculator.
What ROI means for an event.
Return on investment is a simple fraction: what came back, divided by what went in.
The hard part is agreeing on what "came back" means before the event, because every stakeholder has a different answer.
The measures.
The ROI calculator takes these inputs and produces the figures and a chart you can paste into the report.
Enter costs with tax included, because the client paid tax.
Honest accounting.
Three things make event ROI reports untrustworthy, and all three are avoidable.
The first is counting invited guests instead of attendees; cost per attendee is always worse than cost per invitation and the honest number is the worse one.
The one-page report.
The committee will not read two.
The order is fixed: purpose and the measure agreed in advance, headline result in one sentence, a small table of the numbers, three things that worked, three things to change, and the recommendation for next year.
Worked example: the Harbour Gala.
Costs, with HST and service charges included: hotel food and beverage 24,000 dollars; AV 4,800 dollars; rentals, florals and décor 3,900 dollars; entertainment (two strolling magicians, mentalist, band) 9,300 dollars; photography 2,500 dollars; printing, signage and registration 1,100 dollars; planner fee 4,500 dollars (HST extra, 5,085 dollars).
Yes, that is above the 40,000 dollars envelope: the committee approved the band and the photographer separately when the sponsorship came in, and the report says so.
That is the lesson. The worksheet and the quiz are just below this video.
What you will be able to do
- Compute the ROI measures
- Write a one-page report
- Present results to stakeholders
What ROI means for an event
Return on investment is a simple fraction: what came back, divided by what went in. The hard part is agreeing on what “came back” means before the event, because every stakeholder has a different answer. For a fundraiser it is net proceeds. For a product launch it is leads and pipeline. For a staff party it is retention and whether people say they would come again. For a wedding there is no ROI and you should not pretend there is. Decide the measure with the client in the discovery phase, write it on the first page of the proposal, and the report at the end writes itself.
The measures
| Measure | Formula | Used for |
|---|---|---|
| Total cost | Every invoice including HST and service charges, plus the planner fee, plus internal staff time if the client counts it | Everything |
| Cost per attendee | Total cost ÷ attendees who actually came (door count, not invited) | Comparing events year over year |
| Net proceeds | Gross revenue (tickets, sponsorships, donations, auction) − total cost | Fundraisers |
| Cost to raise a dollar | Total cost ÷ gross revenue | Fundraisers; boards understand it instantly |
| Cost per lead | Total cost ÷ qualified leads captured | Corporate, trade shows |
| Pipeline generated | Sum of the value of opportunities opened within 90 days that cite the event | Corporate sales events |
| Retention signal | Share of attendees who say they would return, from the survey | Annual events, staff events |
| ROI | (Return − cost) ÷ cost, as a percentage | Any event with a dollar return |
The ROI calculator takes these inputs and produces the figures and a chart you can paste into the report. Enter costs with tax included, because the client paid tax.
Honest accounting
Three things make event ROI reports untrustworthy, and all three are avoidable. The first is counting invited guests instead of attendees; cost per attendee is always worse than cost per invitation and the honest number is the worse one. The second is counting gross revenue without the cost of raising it; a gala that grosses $120,000 and costs $65,000 did not “raise $120,000”. The third is attributing pipeline that would have happened anyway; a sales event can take credit for opportunities where the first contact was at the event or where the customer says so, and not for a renewal that was already in motion.
Say what you do not know. If the survey had fifty responses, say the retention figure is based on fifty. If a sponsorship was secured before the event was planned, show it in revenue but say so. Clients and boards trust a report that admits its limits more than one that does not.
The one-page report
One page. The committee will not read two. The order is fixed: purpose and the measure agreed in advance, headline result in one sentence, a small table of the numbers, three things that worked, three things to change, and the recommendation for next year. Every number traces back to an invoice, a door count or a survey response, and the appendix (which can be as long as it needs) holds the trail.
- Purpose and measure. “Raise net proceeds for the foundation; measure is net proceeds and cost to raise a dollar.”
- Headline. One sentence with the number.
- The numbers. Revenue by source, cost by category, the measures from the table above.
- What worked. Three lines, each tied to a number or a survey theme.
- What to change. Three lines, same rule.
- Recommendation. Date, budget envelope and the one structural change for next year.
Worked example: the Harbour Gala
Costs, with HST and service charges included: hotel F&B $24,000; AV $4,800; rentals, florals and décor $3,900; entertainment (two strolling magicians, mentalist, band) $9,300; photography $2,500; printing, signage and registration $1,100; planner fee $4,500 (HST extra, $5,085). Total $50,685. Yes, that is above the $40,000 envelope: the committee approved the band and the photographer separately when the sponsorship came in, and the report says so.
Revenue: 200 tickets at $250 ($50,000); eight table sponsors at $5,000 ($40,000); paddle raise $38,500; silent auction $9,200. Gross $137,700. Net proceeds $87,015. Cost to raise a dollar: $0.37. Cost per attendee: $50,685 ÷ 203 = $250. Survey retention signal: 4.4 out of 5 on 51 responses.
The headline line reads: “The Harbour Gala netted $87,015 for the foundation at a cost of 37 cents per dollar raised, with 203 guests attending.” Worked: the mentalist before the ask (paddle raise exceeded the $30,000 target; eleven survey mentions); table sponsorship structure (sixty percent of the envelope increase); the program finishing the ask before 9 p.m. To change: server count at the hotel (food scored 3.6); the chair’s speech cap at five minutes; a second coat check. Recommendation: same venue, second Thursday in November, envelope $45,000 with the band and photographer inside it, target net $95,000.
Presenting to stakeholders
Present in ten minutes, in person or on a call, with the page on the screen. Lead with the headline, then the numbers, then the changes. Do not read the page. Expect two questions: “Why was the cost over the envelope?” and “What would it take to net more next year?” Have the answers in your notes. Leave the one-pager and the appendix, and ask for the date of next year’s event before you leave the room. The report is the first sales call for next year, and the number on it is your case.
Common mistakes
- Reporting gross revenue as “raised”.
- Dividing by invited guests.
- Leaving HST and the service charge out of cost because the quotes did not include them.
- A four-page report nobody reads.
- Presenting without asking for next year’s date.
Worksheet
Download the worksheet, complete it for your own event (or the running gala example), and keep it in your course binder. It takes about 10 minutes.
Check your understanding
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