A deposit limit caps how much money you can pay in over a chosen period — daily, weekly or monthly. You set it yourself, before you need it, and the operator must enforce it.
Why it is the one to use
Of all the responsible-gambling tools, a deposit limit is the most practical because it acts on the only number that is truly under your control: money in. It does not depend on you deciding to stop mid-session, when stopping is hardest.
The asymmetry that protects you
Regulated operators must apply a decrease immediately but hold an increase for a cooling-off delay (often 24 hours or more). That asymmetry is deliberate: it lets you tighten the limit in the moment but not loosen it on impulse. A well-run site makes the control easy to find; a badly-run one buries it, which is itself a signal worth recording.
The number that also keeps you under the affordability check
In Great Britain a deposit limit now interacts with a second rule. Since 28 February 2025 every licensed operator must run a light-touch financial vulnerability check on any customer whose net deposits reach £500 in a rolling 30 days (the threshold opened at £150 in August 2024 and was raised). The check is done against public data and is not a document request, but it is a real trigger that can lead to questions. A monthly limit set below that figure means the threshold is never crossed — one number, chosen once, that settles two problems.
What a deposit limit does not cover
It caps money in; it does not cap money already in. A balance built from a win can be staked back down to nothing without the limit ever being touched, which is why the reality check and a loss limit — offered by some operators, not all — belong beside it. Bonus funds fall outside it too. And it is set per operator: five accounts are five separate limits, and no scheme adds them together. The one control that sits above every account is a gambling block at your bank, which most UK banks now offer free and which our responsible-gambling page walks through.