Digital Payments
Why Paying by Phone Makes You Spend More (And What to Do About It)
The most expensive thing about tap-to-pay isn't the transaction fee — it's what happens to your brain the moment physical money stops being real.
The Idea
There's a concept in behavioural economics called the 'pain of paying' — the mild but genuine discomfort that fires in your brain when you hand over something tangible. Cash triggers it most acutely. You feel the loss. Tapping a card dulls it somewhat. Tapping a phone or a watch barely registers at all. The friction is almost gone, and with it, so is a natural psychological brake on spending. This isn't a small effect. Studies consistently show that people spend more freely — and tip more generously, sometimes to their own surprise — when the payment method is abstract. Digital payments are the most abstract form of exchange ever normalised at scale. The money doesn't leave anywhere you can see. There's no counting, no handing over, no visible diminishing of a wallet. What makes this particularly interesting is that digital payments were sold to us on pure convenience — faster, safer, easier. True on all counts. But 'easier' turns out to have a double meaning. Easier to buy what you need. And easier to buy what you only vaguely wanted until a frictionless interface made the decision for you. The irony is that the same smartphones enabling this kind of unconscious spending also carry budgeting apps designed to counteract it. The tool that numbs the pain of paying can also be the tool that makes it visible again — but only if you actively make it so.
In the World
In 2017, researchers at MIT's Sloan School of Management ran an experiment that has since become something of a landmark in this field. Participants were asked to bid in an auction for tickets to a sold-out sporting event. Half paid in cash if they won. Half paid by card. The card group bid, on average, roughly twice as much. Same event. Same people. Different payment method — different psychological relationship to the money being spent. This dynamic plays out at civilisational scale now. Sweden made headlines for becoming nearly cashless faster than almost any other country — by 2023, fewer than one in ten transactions there involved physical notes or coins. Retailers stopped accepting cash. Churches started taking contactless donations. The Swedish central bank, the Riksbank, grew concerned enough to launch a public campaign encouraging people to keep some cash at home — not for nostalgia, but because a society with zero cash infrastructure is fragile if digital systems fail, and because something about the cashless norm was making financial behaviour harder to track and govern for ordinary people. Meanwhile, in Kenya, M-Pesa — the mobile money system that launched in 2007 — gave millions of people access to financial services for the first time, with measurably positive effects on household savings and poverty reduction. Here, digital payments reduced friction in a genuinely liberating way, for people who had never had a bank account. The same technology, producing opposite psychological and economic outcomes depending on the context it enters.
Why It Matters
Understanding the pain-of-paying effect doesn't mean you should start withdrawing cash for every purchase. It means you should know what you've opted out of when you tap your phone. That mild discomfort was doing quiet work — keeping you anchored to the reality that money is finite and its movement is meaningful. The practical upshot is worth sitting with. If you've noticed that months feel financially slippery in a way that years ago they didn't, it's not just inflation or lifestyle changes. It may partly be that the act of spending has become so smooth it barely registers as a decision. You can reconstruct some of that friction deliberately — checking your balance before discretionary purchases, using envelope-style budgeting within an app, or simply pausing to name what you're spending before you tap. None of this is about hair-shirt frugality. It's about restoring a little of the cognitive weight that cashless systems silently remove. Digital payments are not going away, and on balance they have made financial life genuinely better for hundreds of millions of people. But 'convenient' and 'neutral' are not the same thing — and knowing the difference is what separates someone who uses the system from someone the system uses.
A Question to Ponder
If you had to guess, how much did you spend last week — without checking — and what does the gap between your guess and the real number tell you about how present you were for your own financial decisions?
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