Why Promotional Products Work: The Endowment Effect Explained
Think about the promotional products you’ve held onto over the years. Maybe the conference tee that’s still your favorite sleep shirt. Or the branded water bottle that’s become your go-to for every workout. What about the notebook you picked up at a trade show and now write in every meeting. 
None of these items are particularly valuable at first glance. Yet for some reason, they’ve earned a permanent place in your life – and you’d even be disappointed if they were lost or taken.
Behavioral psychologists have a name for this phenomenon: the Endowment Effect.
What is the Endowment Effect?
The Endowment Effect is a behavioral psychology principle that suggests people place a higher value on something simply because they own it.
Researchers famously demonstrated this through a study where some participants received branded coffee mugs. Those who received the mug were asked how much they would need to be paid to give it up, while those without it were asked how much they would pay to acquire it. The result was a clear gap: owners consistently valued the same mug at roughly two to three times more than buyers were willing to pay.
That’s why people struggle to part with old t-shirts, have a junk drawer full of branded pens, or insist their well-used coffee mug is better than every other one in the cabinet. Once something becomes “ours”, its perceived value increases. For marketers, that raises an interesting question: if ownership changes how people value an object, can it also influence how they perceive the brand attached to it?
What does this have to do with promotional products?
Promotional products allow brands to create that ownership – and therefore, the perceived value – without requiring a purchase.
Marketers spend a lot of time trying to increase the perceived value of their brand by highlighting its attributes, functionality, or prestige. Promotional products are one of the few marketing tools that can create ownership without requiring a purchase. By placing something tangible into a customer’s hands, brands create an opportunity for ownership – and with it, the increased perceived value that comes from the Endowment Effect. Then, some of that positive association extends to the brand behind it.
Of course, the Endowment Effect doesn’t mean people automatically fall in love with every giveaway they receive. The item still has to earn a place in their lives. That’s why the most effective promotional products are useful, thoughtful, or simply enjoyable to receive.
For brands, the value extends far beyond the initial handoff. Every time that notebook gets opened in a meeting, that tote bag gets packed for a trip, or that water bottle gets refilled, the recipient is interacting with an item they’ve already assigned value to. Those repeated touchpoints help keep your brand present long after the event, campaign, or conversation has ended.
Want to take ownership a step further?
If the Endowment Effect tells us people value things more once they own them, another psychological principle suggests they may value them even more when they’ve helped create them. 
Known as the IKEA Effect, this phenomenon describes our tendency to place greater value on things we’ve contributed effort toward (like the way you have to build your IKEA furniture.) For marketers, that doesn’t necessarily mean handing out Allen wrenches at your next trade show. It could be as simple as allowing attendees to choose their own item, personalize a product, build a custom kit, or earn merchandise through participation.
But before a promotional product can benefit from the Endowment Effect, it has to pass a much simpler test: “Do I want this?” Good tactile marketing will give people something useful, surprising, or genuinely delightful, and they’re far more likely to bring it home. From there, psychology takes over.
Looking for that next great giveaway? We’d love to help you find it.
