Traps & Dark Patterns
A Tip Screen With A Default Somebody Chose
Payment terminals now request tips in transactions that never involved them, using preset options and a countdown of social pressure to set the amount.

Handheld and countertop payment terminals routinely present a tipping screen, including in transactions where no service was performed. The design of that screen does most of the work.
The options are chosen by the merchant
Preset percentages and amounts are configured in the payment software. They are a business setting, not a convention, and they vary from one terminal to the next.
Presenting three options and a smaller alternative frames the middle one as normal, which is the usual effect of any set of defaults.
The lowest available option is often higher than what would have been left voluntarily, which raises the floor without appearing to demand anything.
The screen is turned toward an audience
The terminal is faced toward the customer while an employee stands opposite, and often while other people wait behind.
Choosing the no-tip option requires locating it and pressing it in that setting, which is a social cost rather than a financial one.
That cost is the mechanism. Nothing on the screen compels anything, and the arrangement supplies the pressure instead.
Percentages can be computed on a larger number
A preset percentage may be applied to a total including tax, delivery charges or service fees rather than to the goods alone.
The difference is small on a single transaction and consistent across all of them, and it is not stated on the screen.
Entering an amount rather than accepting a percentage removes the ambiguity, which is why the custom option is usually the least prominent.
Where the money goes is not always clear
How tips are distributed depends on the business, the arrangement with staff and applicable rules that vary by state.
Some are pooled across a shift, some go to the individual, and service charges labeled differently may not be tips at all in a legal sense.
A charge described as a service fee is set by the business and is a price rather than a gratuity, whatever it sounds like.
Why it spread so quickly
Modern point-of-sale systems ship with the prompt available, and enabling it costs the merchant nothing while adding revenue that does not appear as a price increase.
Prompts consequently arrived in counter-service, retail and self-checkout settings where the practice had no history.
The spread is a software default doing what defaults do, which is the same reason unchosen settings shape so much of what people spend.
Questions readers ask
How do I value a bundle properly?
Price only the components you actually wanted, at the best price you could get them separately, and compare that total with the bundle price.
Why are bundle savings often so large?
Because every component is counted at its full list price, including the ones with the widest margins and the ones you would never have bought.
Also by Bhavesh Ranka
- Cost-plus and value pricing put two different tags on one objectHow Pricing Works
- Prices ending in nine outlived the reason they were inventedHow Pricing Works
- Good, better, best: what the middle option is forHow Pricing Works
- The successor announcement is the event that moves the old priceWhen to Buy





