Synonyms: deceptive patterns, deceptive design, manipulative design, dark design patterns
Do not index
Definition
A dark pattern is an interface trick that gets people to do something they didn't mean to: buy an add-on, hand over data, or stay subscribed.
The test is simple: would the user thank you for the design if they saw exactly how it worked? If not, it's a dark pattern, and it works against the user-first design the field is supposed to stand for.
Use cases
Dark patterns win in the short term and cost you later. They lift a metric this quarter, then come back as chargebacks, one-star reviews, lost trust, and increasingly, fines.
Roach motel: Amazon made Prime one click to join and a six-click, 15-option maze to cancel, nicknamed "Iliad" internally. The FTC settled with Amazon for $2.5 billion in September 2025.
Hidden costs: A checkout that only reveals insurance or shipping fees on the final step, after the user feels committed.
How it's used in practice
Designers use this term to spot and remove these tricks, not add them:
Audit the usual offenders. Cancellation, consent, checkout, and unsubscribe flows are where deceptive patterns hide.
Make opt-out as easy as opt-in. Symmetric choices, no pre-checked boxes, no guilt copy.
Show costs and terms upfront. Put the full price and the catch on the first screen, not the last.
Run the thank-you test. If you'd hide the mechanism from the user, don't ship it.
Pro-tip: The line between a nudge and a dark pattern is consent. A nudge helps people do what they already want. A dark pattern serves you at their expense. If you'd hide how it works, you have your answer.
Challenges & limitations
Fuzzy line: Aggressive-but-legal persuasion shades into manipulation, and reasonable people disagree on where a nudge ends and a dark pattern starts.
Pressure from above: Designers rarely choose these. Growth targets and executives push them, so resisting takes real organizational backing.
Patchy regulation: Laws vary by country and lag behind new tricks, so "legal" doesn't always mean "ethical."
