June 20, 2026 · Dan Ariely, Predictably Irrational~4 min read
Here is a number worth sitting with: 14.1%. In a large ticketing experiment, customers who were shown the fees on a second screen — after they'd already picked their seats — were 14.1% more likely to buy than customers shown the same fees up front. The product was identical. The final total was identical. The only thing that changed was when you saw the fee. Your decision was bent not by what you were buying, or even by what it cost, but by the timing of a disclosure.
The trick has a name: the late tab
Let's call it the late tab — the fee that waits in the wings and steps out only at the final screen, after you've clicked through colors, sizes, dates, seats. Restaurants do it, airlines do it, delivery apps do it, ticket sellers do it. The advertised price pulls you in; the "service fee," "processing fee," "convenience fee," and "facility charge" arrive one screen too late to scare you off. None of this is an accident. The 14.1% says it pays — handsomely — to make you meet the real total only after you've fallen in love with the cheap one.
Why the late tab works: you have no value meter
Dan Ariely's Predictably Irrational explains the wiring. We have no built-in gauge that reads "this is worth $84." We only ever compare. So the first number you see — the advertised sticker — becomes the anchor, the reference point against which everything else is judged. When the $11 fee finally surfaces, your brain doesn't ask "is $11 fair?" It asks "what's $11 next to the $73 I already accepted?" Small. Rounding error. The anchor was set early and on purpose, and every later number quietly arranges itself around it — what Ariely calls arbitrary coherence.
A large ticketing experiment found that revealing fees one screen later — after you had chosen — made buyers about 14.1% more likely to pay than showing the same fees up front. Same product, same $84 total; only the timing changed. Framework: Dan Ariely, Predictably Irrational. Popular-science explainer, not financial advice.
The hand on your back: why you don't just walk away
By the final screen, something else has happened. You've spent ten minutes choosing the aisle seat, the Saturday show, the gift wrap. That effort is gone whether you buy or not — but it doesn't feel gone. It feels invested. Abandoning the cart now feels like a loss, and we hate losses more than we like equivalent gains. So the late tab isn't just an anchor; it's a hand resting gently on your back, nudging you across a line you'd never have crossed if the fee had greeted you at the door. You think you chose freely. You chose under pressure you couldn't see.
Yes, some fees are real — that's not the problem
Be fair to fees. A venue has costs; a delivery driver must be paid; processing payments isn't free. The objection here is not that fees exist. It's that they're hidden and late — disclosed at the moment of maximum commitment and minimum scrutiny, where the anchor and the sunk effort do the persuading. A fee shown honestly in the advertised price is information. The same fee dripped onto the last screen is a tactic. That distinction is exactly what 2026's regulators are chasing: in April the U.S. FTC opened a rulemaking on unfair or deceptive fees in food and grocery delivery; in January New York City issued executive orders aimed at junk fees and subscription "tricks and traps"; state attorneys general kept up enforcement — following the September 2025 suit against Live Nation/Ticketmaster over drip pricing.
What this means for you: widen the frame before you commit
Here's the liberating part of Ariely's big idea: our irrationality is systematic. It runs on rules. That's why it can be engineered against you — and why it can be defended against. Three moves break the late tab. First, refuse the anchor: ask where that first number came from and whether it was ever the real price. Second, widen the comparison frame — don't compare the fee to the sticker, compare the real total to what you'd happily pay if you'd seen it on screen one. Third, run the net number before you commit, not after. And when the final total ambushes you, name what's happening out loud: this is the late tab, and the feeling that I have no choice by now is the trick working, not a fact about my options.
The fee didn't change. Only when you saw it did.
Compare the real total to your first instinct — not to the sticker that was chosen to fool you.
Sources: a large-scale ticketing field experiment on fee-screen timing (the 14.1% figure); U.S. FTC Advance Notice of Proposed Rulemaking on delivery fees, April 2026; New York City executive orders on junk fees, January 2026; framework from Dan Ariely, Predictably Irrational. Popular-science explainer, not financial or legal advice.