Gambling addiction is a recognised mental health condition in which a person keeps gambling even though it is damaging their life, and cannot reliably stop when they decide to. Doctors call it gambling disorder. It is not a lack of willpower and it is not a moral failing. Both of the world’s main diagnostic manuals classify it alongside addictions to substances, because it affects the brain’s reward system in comparable ways.
This page explains what the condition is, the signs clinicians actually look for, how common it is, what causes it, and which treatments have evidence behind them. If you only read one line, read this one: it is treatable, and the treatment with the strongest evidence is a talking therapy that usually takes fewer than ten sessions.
Written from published clinical sources. This article has not been reviewed by a clinician — see our editorial policy. Nothing here is medical advice.
What gambling addiction means in medicine
Two manuals define the condition. The World Health Organization uses the International Classification of Diseases, 11th revision (ICD-11). The American Psychiatric Association uses the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5).
The WHO states that gambling disorder “is described alongside substance use disorders” in both manuals, and sets out three diagnostic requirements in ICD-11: impaired control over gambling; increasing priority given to gambling, so that it takes precedence over other interests and daily activities; and continuation of gambling despite negative consequences.
Notice what is not in that list. There is no minimum amount of money. There is no particular game. There is no requirement that you gamble every day. What matters is control, priority and consequences.
The nine signs of gambling addiction clinicians check
DSM-5 sets out nine criteria. A diagnosis needs four or more of them in the same twelve-month period, and the behaviour must be causing real impairment or distress. The American Psychiatric Association’s own public guidance confirms that a diagnosis “requires at least four of the following during the past year”.
The full wording, as reproduced by the Connecticut Department of Mental Health and Addiction Services, is:
- Needing to gamble with increasing amounts of money to get the same excitement.
- Feeling restless or irritable when trying to cut down or stop.
- Repeated unsuccessful efforts to control, cut back or stop.
- Being often preoccupied with gambling — reliving past bets, planning the next one, or working out how to get money to gamble with.
- Often gambling when feeling distressed: helpless, guilty, anxious or low.
- After losing, often returning another day to get even — “chasing” losses.
- Lying to hide how much you gamble.
- Having risked or lost a relationship, job, or education or career opportunity because of gambling.
- Relying on other people for money to deal with financial trouble gambling has caused.
The same source gives the severity bands, and the number of criteria matters:
| Criteria met in 12 months | Severity |
|---|---|
| 0 to 3 | Below the diagnostic threshold — which does not mean no harm |
| 4 to 5 | Mild |
| 6 to 7 | Moderate |
| 8 to 9 | Severe |
One criterion is worth singling out. Chasing losses — going back to win back what you lost — is the behaviour that most reliably separates harmful gambling from the ordinary kind. If you recognise only one thing on this page, recognise that.
A word of caution about self-diagnosis. Counting your own criteria can tell you whether it is worth talking to somebody. It cannot give you a diagnosis, and the two are genuinely different things. DSM-5 also requires that the behaviour is not better explained by a manic episode — one of several reasons the judgement belongs to a clinician.
How common is it?
The WHO’s gambling fact sheet, published on 2 December 2024, estimates that 1.2% of the world’s adults have a gambling disorder, while noting that global measurement has been limited. It also estimates that around 5.5% of women and 11.9% of men worldwide experience some level of harm from gambling.
The Lancet Public Health Commission on Gambling (The Lancet Public Health, November 2024) found that 46.2% of adults and 17.9% of adolescents had gambled in the previous year, and estimated that 80 million adults worldwide experience gambling disorder or problematic gambling.
Those three figures — 1.2%, 80 million, and the survey rates below — are not the same measurement. WHO’s is gambling disorder. The Commission’s 80 million covers gambling disorder or problematic gambling. The underlying meta-analysis (Tran et al., The Lancet Public Health, August 2024) pooled studies using several different instruments. Treating them as one number would be wrong.
Risk is concentrated in particular products
The Commission found that gambling disorder could affect 15.8% of adults who gamble on online casino or slot products, and 8.9% of those who bet on sports. It also found that the top 20% of most active gamblers account for around 92% of sports bets and 90% of online casino activity.
The WHO puts the commercial side of that plainly: people gambling at harmful levels generate around 60% of all gambling losses. The harm is not spread evenly across customers, and neither is the revenue.
Why Great Britain has two very different numbers
This part confuses almost everyone, including journalists, so it is worth getting right.
| Survey | Published | Population | Instrument | How it was answered | Scoring 8+ |
|---|---|---|---|---|---|
| Gambling Survey for Great Britain (GSGB) Annual Report 2025 | 16 July 2026 | Great Britain, 20,775 adults | PGSI | Push-to-web self-completion, postal alternative | 2.4% |
| Adult Psychiatric Morbidity Survey 2023/24 | 27 November 2025 | England | PGSI | Self-completion module inside an interviewer-recruited home interview | 0.4% |
Both figures are real. The GSGB reports 2.4% scoring 8 or more on the PGSI; the APMS reports 0.4%. The gap is about method, not about reality changing.
A common explanation online is that people admit more to a screen than to an interviewer. That is only part of it, and stated baldly it is wrong: the APMS gambling questions were also self-completed, inside the interview. The larger driver is who agrees to take part in the first place. In experiments published by the Gambling Commission in August 2025, simply mentioning gambling in the survey invitation raised reported gambling participation by four percentage points, without changing the overall response rate. Mode mattered too: PGSI scores of 1 or more were 4.4 percentage points higher in online self-completion than by telephone.
The UK’s Office for Statistics Regulation reviewed the GSGB in May 2025 and concluded there is “a non-negligible risk that GSGB statistics over-state the true level of gambling and gambling harm in the population”, adding that direct comparisons between the GSGB and other surveys should not be used to assess trends over time.
The PGSI is a screening tool, not a diagnosis
The Problem Gambling Severity Index is a nine-item questionnaire. It is useful, and it is not a diagnosis. The Gambling Commission’s own guidance on using its statistics explicitly lists “as a measure of addiction to gambling” among the things these figures must not be used for, and states that the PGSI “should not be confused with a measure of gambling addiction”.
So when you see a headline converting a PGSI percentage into a number of “addicts”, the arithmetic may be right but the claim is not one the data supports.
What causes it
There is no single cause. Three groups of factors interact.
The person. A family history of addiction, starting young, and co-occurring conditions such as depression, anxiety or substance use all raise risk. Gambling that begins as a way to cope with distress is a particular warning sign — it appears in the DSM-5 criteria for that reason.
The product. This is the factor most often left out. Games differ enormously in how quickly they can cause harm, and the difference is designed in. Speed between bet and result, the ability to stake again immediately, near-misses, losses dressed up as wins, and continuous availability on a phone all increase risk. That is why the data above shows online slots carrying several times the rate of sports betting.
The environment. Advertising, sponsorship, ease of access, credit, and social norms all play a part. The Lancet Commission’s central recommendation is for “stronger policy and regulatory controls focused on harm prevention and the protection of public health and wellbeing, and independent of industry or other competing influences”.
This is where the language of personal responsibility starts to strain. The WHO fact sheet goes further than most readers expect, saying that so-called responsible gambling “adds to this burden by effectively blaming those who experience harm”, and describing such interventions as “typically ineffective”. We discuss that argument, and the case against it, in what responsible gambling means.
How it usually develops
Gambling addiction rarely arrives all at once. A common pattern runs roughly like this, though plenty of people do not follow it.
It often starts with a period of winning, or at least of enjoying it. Stakes creep up, because the same bet stops producing the same feeling — that is the first DSM-5 criterion, and it is a description of tolerance. Then comes a loss big enough to feel like a wrong that needs correcting, and the chase begins. Chasing is the hinge. Once someone is gambling to recover losses rather than for entertainment, the logic has inverted: the activity is now the proposed solution to the problem it created.
Secrecy usually follows the chase rather than preceding it, and it accelerates everything. Hiding the scale of losses makes it harder to stop, because stopping means the hidden figure has to be said out loud. Many people describe the moment they finally told someone as the point the situation started improving, even though nothing about the debt had changed.
What worries a partner or friend first
People close to someone with a gambling problem often notice behaviour long before they see any evidence about money. The signs that come up most often are unexplained absences and long stretches on a phone; mood that tracks something invisible; defensiveness about ordinary questions; borrowing that does not quite add up; and money arriving or vanishing without explanation.
If that is you, note that support exists for you in your own right and not merely as somebody’s helper. GamCare states that its free, confidential one-to-one support is for anyone affected by gambling harm, including family and friends. The WHO’s estimate that six people are affected for every high-risk gambler is a reminder that affected others are a large group, not an afterthought.
A note on brains and dopamine
You will see confident claims online that gambling “hijacks the dopamine system” in the same way as cocaine. Treat the confident version with suspicion. It is well established that gambling engages the brain’s reward-learning circuitry, and that unpredictable rewards engage it particularly strongly — which is why the classification alongside substance addictions is not arbitrary. What is not established is the tidy popular story in which one chemical explains the condition and willpower is irrelevant. The honest position is that gambling disorder has neurobiological, psychological and commercial components at once, and that treatment works through the psychological ones.
How it harms people
Money is the visible harm and rarely the worst one. Debt arrives alongside secrecy, and secrecy damages relationships faster than the debt does. Work suffers. Sleep suffers. Many people describe months of managing an elaborate private accounting system that nobody else knows exists.
Harm also spreads beyond the person gambling. The WHO estimates that for every person gambling at high-risk levels, an average of six other people are affected — partners, children, parents.
Gambling is also associated with suicide. If this is where you are right now, please contact the crisis services at the top of this page, or in the UK call Samaritans free on 116 123, at any hour. The WHO fact sheet reports that people with a gambling disorder were 15 times more likely to die by suicide, and that in Victoria, Australia at least 4.2% of suicides were found to be gambling-related. Those numbers are here to make the case for treating this as a health problem and seeking help early — not to tell anyone that their situation is hopeless. It is not.
One more number, and it may be the most important on this page: the WHO estimates that only about 0.14% of the population seeks formal or informal help for current gambling problems. The gap between the number of people harmed and the number getting help is enormous.
What treatment actually works
Cognitive behavioural therapy has the strongest evidence. An umbrella review and meta-analysis published in Clinical Psychology Review in 2023 found that CBT significantly reduced gambling disorder severity, frequency and intensity compared with minimal or no treatment, and concluded there is “strong evidence for CBT in reducing gambling harm and gambling behavior”. The same paper is careful about limits: the longer-term follow-up evidence is much weaker.
In the UK, NICE guideline NG248, published on 28 January 2025, recommends offering group CBT to reduce gambling severity and frequency, starting as soon as possible after diagnosis, and individual CBT for people who would rather not join a group. NICE describes a course as usually 8 to 10 sessions in a group, or 6 to 8 individually. That is a shorter commitment than most people assume.
Medication
No medicine holds a licence for treating gambling disorder. A critical review in Frontiers in Pharmacology, published in May 2026, states plainly that “no medication has been officially approved for the treatment of GD”, while noting that opioid antagonists are currently the most evidence-based drug therapy and that larger placebo-controlled trials are still needed.
NICE does allow a role for medication: it says clinicians may consider naltrexone if psychological therapy has not achieved the desired outcome, started by an appropriately qualified specialist — and states explicitly that, as at January 2025, this was an off-label use. Off-label is not the same as unsafe or improper; it means the medicine is licensed for something else and is being used outside that licence on clinical judgement. Never start or stop any medication because of something you read on a website.
Where treatment comes from in England
The funding and commissioning of gambling treatment in England changed recently. NHS England states that from 1 April 2026 it took commissioning responsibility for the treatment of gambling-related harms in England, covering the full pathway from referral and triage to aftercare, funded by a national levy worth approximately £100 million a year which came into effect in April 2025.
Be aware that public information about this is still catching up. The NHS.uk gambling page was last reviewed on 8 December 2023 and therefore predates the change, and different charity websites currently describe the arrangements in different tenses. For a reader, the practical position is unchanged: NHS gambling clinics accept self-referral, and the helpline below is free and open at any hour.
Getting help
You do not need a diagnosis, a certain level of debt, or a plan before you contact someone. In Great Britain, GamCare runs the National Gambling Helpline on 0808 8020 133, free, and states that it is available 24 hours a day, every day of the year. It also offers live chat and WhatsApp, and support for family and friends as well as for people who gamble.
Two practical steps often help alongside treatment rather than instead of it: blocking your own access to gambling, and letting someone know what is going on. Both reduce the number of decisions you have to win in a day.
Common questions
Is gambling addiction a real addiction?
Yes. Both ICD-11 and DSM-5 classify it alongside substance use disorders rather than as a habit or a character flaw.
Can someone gamble safely again after treatment?
This is genuinely contested among clinicians, and the honest answer is that it depends on the person and the severity. Discuss the goal with a professional rather than deciding alone.
I only gamble occasionally. Can I still be harmed?
Yes. Most gambling harm in a population happens below the clinical threshold, simply because far more people gamble at lower risk levels than at high ones. Scoring under four DSM-5 criteria does not mean nothing is wrong.
About this page
Written by Jose Del Pozo. We take no money from gambling operators and publish no affiliate links — see funding and independence. If you find an error on this page, please tell us; our corrections policy explains how we handle them.
Last reviewed: 20 September 2026. Sources checked on this date.