In your account settings, usually under responsible gambling or limits. Increases take effect after a cooling-off period by law in most regulated markets, while decreases apply immediately.
Where to find it
Account settings, under a heading like responsible gambling, limits, or player protection. Every licensed operator must offer this and must not bury it. If you cannot find it in a couple of clicks, that counts against the operator in our scoring.
You can usually set daily, weekly and monthly limits at once. The tightest one applies.
The asymmetry, and why it matters
Lowering a limit takes effect immediately. Raising one does not. In regulated markets an increase is held for a cooling-off period, typically 24 hours to seven days depending on the jurisdiction, and some require you to reconfirm after the wait.
That delay is the entire point. The moment you most want to raise a limit is usually the moment you should not, and the wait exists to put a gap between the impulse and the deposit.
Set them before you need them
A limit set while calm is a decision made by the version of you that is thinking clearly. Setting one during a losing session is possible but much harder. Treat it like a standing instruction to yourself rather than an emergency brake.
Loss limits are often better than deposit limits
A deposit limit caps what goes in. A loss limit caps what you can actually lose, which accounts for money you win and then re-stake. If the operator offers both, a loss limit is the more honest constraint. Session time limits and reality-check reminders address a different problem, which is losing track of how long you have been playing.
If limits are not enough
Limits work when the underlying relationship with gambling is basically healthy. When it is not, the stronger tools are national self-exclusion, which blocks every licensed operator at once, and a gambling block at your bank. Both are covered on our responsible gambling page.