The Receipt Is Lying to You

There’s a particular kind of insult in being told a number with a straight face and not being allowed to ask where it came from. We’ve all just agreed to accept this lately, the way you accept a bad cocktail you already paid for. The price is the price. Don’t make it weird.

Except it is weird, because the going explanation, tariffs, is doing a lot of heavy lifting it hasn’t earned. Sure, the 2025 tariffs raised real costs for retailers bringing things into the country, fine, that’s economics, I took the class. What economics does not explain is a coat going up $400, dropping $600 three weeks later, then climbing back up again before the season’s even over, all while the coat itself hasn’t changed a single thread. That’s not a tariff. A tariff doesn’t have mood swings. What that actually is, is demand-based pricing software, the same category of thing that decides what your flight to Denver costs depending on the day, the deadline, and how much it senses you need to be there, and it has been operating underneath fashion retail for a while now with absolutely no one sending a memo to the customer.

Here is the part I find almost flattering, in a deeply backhanded way: an entire industry built a business model on the bet that you would not check. And for a long time, you didn’t, because checking meant a dozen browser tabs and the kind of patience usually reserved for filing taxes. Then two women who met as roommates at Stanford got annoyed enough by their own forty open tabs to build an app called Phia that does the checking for you, instantly, against a quarter of a billion secondhand listings and over 40,000 sites, and tells you in a few seconds whether the number in front of you is high, typical, or fair. Kleiner Perkins handed them eight million dollars for the idea within months, which is venture capital’s way of saying yes, obviously, we all knew this was a racket too.

But the thing that’s actually interesting isn’t the eight million dollars, it’s what an app like this does to the rest of the supply chain once it exists. Retailers don’t just lose the sale on the overpriced item. They lose the customer’s blind spot, permanently, which is a much bigger casualty, because that blind spot is what let them get away with overproducing in the first place. Fashion has spent the better part of a decade making far more of everything than anyone needed, on the assumption that markdowns would clear the surplus and full-price customers wouldn’t notice or wouldn’t care that the same coat was forty percent off three weeks after they paid for it. An app that surfaces the going rate in real time turns that whole strategy into a liability instead of a safety net, because now the discount that was supposed to quietly absorb the overproduction is visible to the person who didn’t get it, instantly, sitting right there in her hand while she’s still holding the receipt.

What I keep thinking about is less the app itself and more what it says about the agreement we’d all silently made. Full price was never really about the dollar amount. It was about being willing to take someone’s word for it, the brand’s word, that this was a fair ask, and not embarrass everyone by checking. That agreement only held up because checking was annoying. Make checking effortless and you haven’t just built a shopping tool, you’ve ended a very profitable silence, and you’ve handed the customer leverage she didn’t know she was missing, which is a different kind of power than a discount code. A discount code makes you feel lucky. Knowing the real number makes you feel correct, and those are not the same feeling at all, even though retail has spent years trying to convince you they are.

There’s also something genuinely uncomfortable in this for the brands who’ll insist they’re the exception, that their pricing is principled, considered, justified by craftsmanship rather than software. Maybe some of them are telling the truth. But an industry doesn’t get to claim the moral high ground on pricing while simultaneously refusing to explain it, and for years that’s exactly the arrangement luxury retail has run on: trust me, don’t ask. The moment a free app can answer the question a salesperson can’t, that arrangement stops being a brand strategy and starts being a tell.

So here’s the uncomfortable question underneath all of it. If a brand can’t tell you why a price moved three times in one season without reaching for a software explanation, did it ever actually know what the thing was worth, or was it always guessing and calling the guess a decision? Tariffs didn’t create the volatility, they just gave it somewhere respectable to hide. An app like Phia can tell you a number is high, typical, or fair relative to everyone else selling the same item. It can’t tell you whether anyone, anywhere in that supply chain, ever sat down and decided what the object was actually worth based on what went into making it. That’s a different kind of question than the one Phia is built to answer, and it’s the one worth sitting with: how many prices in this industry were ever really set, and how many were just survived, by whoever blinked last.

— Bai

Interiors of Fashion