Events
The maths is the easy half. Return on investment is what the event returned, minus what it cost, over what it cost — and anyone can do that arithmetic. What makes event ROI hard is that most of the value walks out of the room unrecorded, and almost everything that decides whether you can count it happens before the doors open. Here is what belongs in each half of the fraction, and the four things to put in place while the event is still a plan.
Both numbers are bigger than the invoice
The cost side is not the agency quote. The value side is not the number of people who showed up. Write both out in full before the event, because after it you will only be able to count what you set up to count.
| Cost, honestly | Value, honestly |
| The production quote, including overtime and holiday rates | Qualified leads captured, with the source recorded |
| Venue, food, AV, permits, insurance | Meetings booked out of the room, not business cards collected |
| Content produced for the day — film, design, print | Existing pipeline that moved, which sales can tell you |
| Internal time: your team’s hours are the cost nobody bills | Content assets that keep working after the day |
| Travel, accommodation, per diem | Press, partner and social pickup you can point to |
| Post-event work: edits, follow-up, reporting | Recruitment, retention and partner conversations that started there |
Two lines catch people out. Internal time is usually the second-largest cost on the list and almost never appears. And post-event work — the edits, the follow-up sequence, the report itself — is part of the event, not an afterthought.
Decide what counts as a result, in writing
Before anyone books anything, agree what the event has to produce. Not “awareness”. Something you can count on a specific date.
→ Name the metric and the number. “40 qualified leads” is a target. “Strong engagement” is a description of a feeling.
→ Define qualified. Who decides a lead is real, and on what basis? If sales disqualifies half of them in October, the October number is the one that was true.
→ Set the window. Thirty days, sixty, ninety. An event that produces a deal in March did not fail in January; it just needs a window everyone agreed to in advance.
→ Say which number is the headline. One. The rest are supporting. A report with eleven equally weighted metrics is a report nobody acts on.
Instrument it before the doors open
This is the part that cannot be done afterwards, and it takes about an hour.
→ One landing page, with tagged links. Every invite, QR code, partner post and email gets its own tagged URL. Google’s campaign parameters are the standard: utm_source is the referrer, “for example: google, newsletter4, billboard”; utm_medium is the marketing medium, “for example: cpc, banner, email”; utm_campaign is the campaign itself. Untagged traffic all arrives as “direct” and cannot be told apart afterwards.
→ One key event, marked before the invites go out. In Google Analytics, a key event “measures an action that’s particularly important to the success of your business”, and “any event you collect can become a key event”. Mark the registration or enquiry as one, and you can “evaluate marketing performance across all channels that lead users to perform the action” — which is the ROI question, asked in the tool’s own words.
→ A registration list you can reconcile. Registered, attended, and no-show are three different numbers. Capture attendance at the door, not by estimate. The gap between registered and attended is itself a finding.
→ A single owner for the numbers. One person pulls the figures and one person receives them. Two people reporting the same event produce two different answers and a meeting about which is right.
The hour that decides the report
Tagged links, one key event, a registration list and a named owner. All four are set up while the event is still a plan, and none of them can be added afterwards.
The Philippine part people skip
If you are going to measure by following up with attendees, the follow-up has to be lawful. Under the Data Privacy Act, consent is “any freely given, specific, informed indication of will, whereby the data subject agrees to the collection and processing of personal information”, and it “shall be evidenced by written, electronic or recorded means”.
Section 11 goes further on the purpose: personal information must be “collected for specified and legitimate purposes determined and declared before, or as soon as reasonably practicable after collection, and later processed in a way compatible with such declared, specified and legitimate purposes only”. In plain terms: if the registration form does not say you will follow up, the follow-up is a different purpose from the one the guest agreed to. That sentence belongs on the form, not in the debrief. Who holds that data if an agency runs your registration is a separate question — the event RFP covers where it should be settled.
General information, not legal advice. Have your own counsel review your registration and consent wording.
What to send the week after
One page, inside five working days, while people still remember the event.
→ The headline number against the target. First line. Hit, missed, or by how much.
→ Registered, attended, no-show. Three numbers, not one.
→ Where the registrations came from. This is what the tagged links bought you, and it is what changes next year’s budget.
→ Cost per result. Total cost divided by the headline metric. Blunt, comparable, and the number a CFO will ask for.
→ What you would do differently. Two lines. Written now, not remembered later.
The structure of that document is a post-event report, and it is worth keeping to the same shape every time so this year can be compared with last.
Where PUNX fits
PUNX runs corporate events and brand activations from Makati: 50-plus people, founded 2023, with P&G, San Miguel, Petron, GCash and Sun Life on the client list. Ask an events company what it will measure before you ask what it will build, and the answer tells you most of what you need to know about how the day will run.
FAQ
How do you calculate event ROI?
Subtract the total cost from the value the event returned, then divide by the cost. The arithmetic is simple; the work is in defining both numbers. Cost includes internal time and post-event work, not just the production quote. Value means results you agreed to count in advance, inside a window everyone accepted.
What should you measure at a corporate event?
One headline metric agreed before booking, plus registered, attended and no-show, where the registrations came from, and cost per result. More metrics than that and nobody acts on the report.
How do you track which invite brought people in?
Give each channel its own tagged link. Google Analytics reads campaign parameters on the URL, where utm_source records the referrer, utm_medium the marketing medium and utm_campaign the campaign. Anything untagged arrives as direct traffic and cannot be separated afterwards.
Can you email event attendees afterwards?
Only for a purpose they agreed to. The Data Privacy Act defines consent as a freely given, specific and informed indication of will, evidenced in writing, electronically or by recording, and requires that personal information be collected for purposes declared before or as soon as practicable after collection. If follow-up is not on the registration form, it is not a purpose the guest consented to.
Related
Brand activation and events — what PUNX runs, and how
Post-event report — the shape the week-after document takes
Event RFP template — what to send before you compare quotes
Reporting on one now?
Send us what you measured and what it cost. We will tell you what is missing, and what to set up before the next one.
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