One assessment date, two different intervals
Invented calendar only: intervention starts 1 January, last reward is 1 February, assessment is 1 July. It is not a study timetable or a payment plan.
| Clock starts at | Assessment date | Elapsed time |
|---|---|---|
| Intervention begins: 1 January | 1 July | Six months from the start |
| Last reward: 1 February | 1 July | Five months since the last reward |
What must happen before anything is awarded?
A cash or voucher reward can depend on a defined smoking assessment. A self-deposit can return the participant's own money rather than provide new money. A competition may only make a person eligible for a draw. These arrangements are not interchangeable with treatment-cost reimbursement or an ordinary purchase you choose for yourself.
Invented reading exercise: A promises a voucher after a stated assessment; B returns money you deposited; C enters qualifying participants in a draw. Ask what is guaranteed once the condition is met, who funds it, what happens to a missed assessment and whether another service is included. This illustrates rules, not a recommended contract or an efficacy test.
Evidence of a group benefit, not a personal bargain
The 2025 Cochrane update searched major databases on 2 November 2023. Its mixed-population analysis compared incentive programmes with usual care or another cessation intervention: 39 trials, 18,303 people, RR 1.52 (95% CI 1.33–1.74), high certainty, for abstinence at the longest follow-up at least six months after intervention start. That is not automatically continuous abstinence for six months or a 52-percentage-point increase.
Trials differed in setting, participants, reward rules and other support; most were in the USA. Pregnancy was analysed separately, not folded into this estimate. A group result does not choose a programme for an individual or predict who will receive a reward.
Put the last reward and the assessment on different dates
The review also excluded seven studies offering a cessation reward at the long-term assessment; a benefit remained. This supports persistence for some time after rewards stop, not permanent protection or an identical six-month post-reward interval in every trial. Record intervention start, last reward and smoking assessment separately.
The amount analysis did not establish a clear advantage for larger rewards. Indirect comparisons across settings are crude; it does not prove all amounts are equivalent or identify a best amount. A separate 2019 competition review, searching to June 2018, did not establish a long-term benefit and rated evidence very low. Do not transfer the 2025 incentive finding to every lottery.
An offer still needs rules, consent and a private route
Before considering an actual offer, request its written conditions: eligibility, assessment, missed visits, payment or deposit return, withdrawal and who can see results. Do not publish smoking records or send them to an unknown promoter. This article neither recommends depositing money nor gives financial, contractual or personal treatment advice.
An incentive is not a requirement for receiving help. NHS Better Health links to support in England; elsewhere ask qualified local services about options and current eligibility. Participation or a missed reward is not a measure of someone's moral worth.
What to keep in mind
Sources
The central claims on this page were checked against the sources below.
- Cochrane: Incentives for smoking cessation (2025): mixed-population and pregnancy analyses separately
Sources checked: 2026-10-05
- Cochrane: Competitions for smoking cessation (2019), search June 2018: prize eligibility is a separate question
Sources checked: 2026-10-05
- NHS Better Health: Ready to quit smoking — local support in England
Sources checked: 2026-10-05
General adult research reading, checked 5 October 2026. The rule example is fictional. No personal payment plan, product recommendation, treatment decision or guarantee; no private inputs collected.