The stereotype is that kink is rare and fringe. The research points the other way: curiosity about power play, restraint, role-play and sensation is one of the most commonly reported categories of sexual fantasy. Most people who have these interests never label themselves "kinky": they just have them.
These are the directional findings that come up again and again: treat them as well-supported general patterns rather than precise figures (see below on why exact numbers vary):
You'll see very different percentages quoted for "how many people are into BDSM", and there's a good reason to be cautious with any single one:
So the honest takeaway isn't a single magic number: it's the consistent direction: kink interest is common, normal, and spread across all kinds of people. We describe our approach to sourcing on our editorial standards page.
If part of why you're reading this is reassurance: consider it given. Being curious about kink puts you with a large share of the adult population, and acting on it consensually and safely is a healthy way to explore your sexuality. Not sure what you're into? The kink test gives you a shortlist, the kinks list explains every term in plain English, and the kink checklist helps you and a partner compare notes.
Kink is common: and there are open-minded adults who share exactly what you're curious about.
Much more common than most people assume. Large fantasy and behaviour surveys repeatedly find that interest in BDSM-adjacent activities is widespread: a majority of people report at least some such fantasy in several studies. Exact figures vary by how each study defines "BDSM" and by honest reporting.
Yes. Research consistently finds that people with kink interests are, as a group, as psychologically healthy as everyone else. Kink is a common variation in human sexuality, not a disorder, when it is consensual and not causing distress.
Because studies define kink differently, rely on self-report about a stigmatised topic (so interest is likely under-reported), and sample different populations. Treat any single percentage as a rough indicator, not a precise fact.