Contents
- Why does the ROI question always arrive too late?
- The formula is the easy half
- Write the return down before the venue deposit
- Fairs and dealer meetings: where can the money actually be traced?
- Forums and site visits pay back on a slower clock
- What is missing from the cost line?
- A headcount mostly proves the venue was the right size
- Rough evidence aimed at the right goal
What did your last event return for the money that went into it?
Most people I put this to answer with something that happened on the day. The hall was full, the speakers were strong, the photos came out well, the client was happy at the farewell dinner. All of that may be accurate, yet not one item on that list is a return. It describes the event, not what the event changed. Measuring event ROI means deciding, before any money moves, which change the event is supposed to produce, and then comparing what it actually brought in with its full cost, your own team’s time included.
I have been on both sides of this question. For years I sat on the client side, requesting proposals, choosing the agency and then explaining to a board whether the forum had been worth it. Today, at the agency I co-founded, I am often the one asked to prove it. From both chairs I have reached the same conclusion: ROI is rarely hard to calculate. It is hard to calculate after the fact.
Why does the ROI question always arrive too late?
The request almost always comes at the wrong moment. The stage has been dismantled, the hotel invoice has been paid (or is about to be chased), and someone from finance or senior management asks a fair question: what did we get for this?
At that point the team starts collecting whatever it can find. Attendance figures, social media reach, the number of business cards in the bowl at the stand, a few thank you emails. Everything is real, and almost nothing answers what was asked. The reason is simple. Nobody decided, at the start, what kind of return the event was supposed to bring, so there is nothing to compare the result with.
The formula is the easy half
Return on investment for an event works the same way it does anywhere else in business. You take what the event brought in, subtract what it cost, and divide by what it cost. If you spent a hundred and the event brought back a hundred and fifty, the return is fifty percent.
Nobody in our industry struggles with the division. The trouble is the first number, the one that says what the event brought in. Even for a product sale, it is not the figure on the invoice but what remains after the cost of delivering that sale, so an order with a thin margin returns far less than its headline suggests. Beyond direct sales, the return might be a contract signed four months later, a dealer who decided to stay with you instead of moving to a competitor, a congress that chose your city for a future edition, or a team that went back to work with a clearer idea of where the company is heading.
Some of these turn into money quickly, some slowly, some never directly. If you try to squeeze all of them into one currency after the event, you end up either guessing or giving up. So the real work is deciding early which kind of return this particular event is meant to produce. The ROI Institute’s methodology, built originally for training and development programs, spends most of its effort on that same point: isolating what the program itself caused before comparing benefit with cost.
Write the return down before the venue deposit
Every event has a moment when it stops being an idea and becomes a commitment. On most projects that moment is the hotel or venue deposit, or the signed offer from the organization company. Before it, you can still change the format, the date or the guest list. After it, the money is moving.
If the expected return is not written down before that moment, the event cannot be measured honestly afterwards.
This does not need a long document. One page is enough, and in my experience the shorter it is, the more likely it is to be read again. Why are we doing this event? Who needs to be there for it to work? What should be different three or six months later if it goes well? Which number, or which piece of evidence, will tell us that it happened?
When a client cannot fill in that page, it is not a measurement problem. It usually means the event is being done because it was done last year, or because a competitor does one. Better to discover that in the first week than after the deposit, since it reshapes the brief and occasionally cancels the event altogether.
Fairs and dealer meetings: where can the money actually be traced?
Trade fairs, dealer meetings, launches for buyers and hosted buyer programs are the cases where ROI behaves almost like it does in a sales report. You can count qualified contacts, follow them through the pipeline and see how many turned into orders, and at what value.
The catch is in the follow up, not in the formula. A pattern I keep running into at trade fairs, whichever hall or country they are in, is a stand team that collects contacts for four days and then goes back to a desk full of postponed work. The business cards sit in an envelope. A spreadsheet is made a few weeks later, when half of the people on it no longer remember the conversation. Six months on, someone asks whether the fair was worth it and the answer is a shrug.
If the sales team agrees before the fair that every contact will get a call within a set number of days, and that the source of each new deal will be recorded as the fair, the calculation more or less builds itself over the following months. The window matters too. A buyer of industrial equipment may take half a year to decide, a consumer promotion a few weeks, and deals still open when the window closes are a forecast, not a return. A contact recorded as coming from the fair is not yet proof that the fair produced the order either, since some of those customers would have bought anyway, which is why I prefer to report a cautious figure and a generous one side by side rather than a single number nobody can defend. It is boring work, and it is also the only reason anyone will believe the number at the end.
Forums and site visits pay back on a slower clock
Then there are events where the return is real but slow. An international forum, a congress your association hosts, a site visit for a group of meeting planners, an incentive trip for top partners, an experiential marketing project meant to be remembered months later. I spent years running operations for an international tourism forum, and the value of those days tended to show up a year or two later, in a partnership or a project that started over a coffee break or during an evening of networking.
Can you put a return on that? Partly. You can keep a simple record of which relationships began or deepened at the event and check back on them later, you can ask the people who attended, a few months on, whether anything came out of it, and you can note which bids, proposals or joint projects mention the event as their starting point.
It will never be as clean as a sales figure, and I don’t think it should pretend to be. The AMEC evaluation framework that communication teams use keeps activity, audience response and organizational impact on separate levels, and that separation protects relationship value from being dressed up as a percentage it cannot honestly carry. What matters is that the expected relationship return was named at the start, so the check at the end is a real comparison rather than a story written to justify the budget.
What is missing from the cost line?
We spend a lot of energy debating the return and very little questioning the cost. Yet the cost line in most event ROI calculations is incomplete.
The invoices from the agency, the venue and the hotel are there, of course. What is usually missing is the internal side: the days your own staff spent preparing, the sales team that was away from customers for a week, the gifts ordered at the last minute, the extra rooms because the rooming list changed three times, the transfers added on the day.
There is often one more hidden cost that our industry rarely names, which is the price of a late brief. When the go ahead arrives only weeks before the date, everything from printing to staffing is bought at rush prices, and nobody records that as a cost of the late decision. I am not saying every hour of every employee must be priced. I am saying that if the cost side only shows what was paid to suppliers, the ROI will look better than it is, and the next event will be planned on a false basis.
A headcount mostly proves the venue was the right size
Let me be honest about attendance, because it is the figure on the first slide of almost every event report I have seen.
Attendance tells you the event happened and that people came. It says nothing about whether the right people came, whether they did what you hoped, or whether anything changed afterwards. A thousand people at a launch can be a failure if the fifty buyers who mattered were not among them. A dinner for forty decision makers can be the best investment of the year. A music festival is the obvious exception, because there the ticket buyers are the return, and even then the useful question is how many of them come back the next summer.
That does not make attendance useless. It becomes a good input when you break it down: how many of the invited target guests came through the registration desk, how many stayed until the end, how many travelled from outside the city. For a virtual event the same logic applies to log-ins, and the useful figure is how many of the right people were still watching after the first session. Those versions of the number make useful event KPIs and start to say something about the return. The raw total, on its own, says very little beyond the fact that the hall was booked correctly.
Rough evidence aimed at the right goal
There is a type of ROI discussion that never ends, because someone always points out that a method is imperfect. A post-event survey is biased, sales attribution is fuzzy, relationship value is subjective. All true. But then, what is the alternative? In practice it is not a more precise method. It is no method at all, followed by a decision based on how the event felt.
I would rather have a rough measure that is honestly aimed at the goal. A short note from the sales team on which deals the event touched, a few questions to hotels in the destination about how the week went if the event was meant to bring visitors (the city’s share in the economic impact of events), a call to a handful of participants a few months later, and a comparison with the same event last year using the same method. None of this is elegant, none of it is a full event impact assessment, and none of it requires expensive software. It requires someone to own it, and a small line in the event budget so the follow up happens after the team is busy with its next client.
It also requires writing down the gap when the result falls short. A report that says the target was three hundred buyers, two hundred came, and here is why, is worth far more to the next decision than a report that only celebrates.
Seen this way, the question I started with was never really about the last event. It is a question that can only be answered well when someone asks it before the deposit is paid, and an event planned with that answer in hand tends to defend its own budget the following year.