Effective incentives to encourage survey participation: What the research says
By Kathryn Casna●7 min. read●Sep 29, 2026
You've written the questions, tested the flow, and launched your survey. But the responses aren’t coming in as quickly as you expected.
Maybe you offered a prize draw when your audience wanted a guaranteed reward. Or maybe the incentive amount didn’t feel worth the time required to participate. Whatever the reason, you may have already lost some of those respondents.
Studies show that incentives are effective for increasing survey response rates. The trickier questions are which incentives work best and how much to offer. The type, amount, and timing of your incentive can all influence how appealing a survey feels to participants. Getting those decisions right from the start can help you avoid a second recruitment wave.
Here’s what the research says about which survey incentives are most effective, how much to offer, when to send them, and how to build an incentive strategy that fits your audience and study.
Key takeaways
No single survey incentive works best for everyone, but monetary rewards like bank transfers, digital wallets, and prepaid cards tend to have the broadest appeal. If you offer gift cards, allow participants to choose from a variety of brands.
Guaranteed incentives generally drive more responses than lotteries and prize draws. Lotteries can still make sense if budget is a constraint, since you only reward a subset of participants.
The incentive amount should reflect the ask. Survey length, effort, topic sensitivity, and the audience you’re recruiting can all influence how much to offer.
There’s no clear winner between prepaid and promised incentives. Choose a structure that fits your audience and budget, then tell participants when to expect their reward and deliver it on time.
Incentives aren’t the only factor that affects participation. Accurate time estimates, clear instructions, and a smooth survey flow can also improve response and completion rates.
Which survey incentives are most effective?
The best incentive depends on your audience, budget, and research goals, but some options have broader appeal than others.
Monetary incentives
Monetary incentives include bank transfers, digital wallets like PayPal and Venmo, prepaid cards, and gift cards. Of these, digital wallets and bank transfers tend to be especially appealing because participants can choose where to spend them.
Prepaid cards offer similar flexibility. Participants can use them at most merchants, so they aren’t locked into spending their reward at a single brand.
Gift cards are still a popular choice, but they’re more limiting because they tie the reward to a specific retailer. When you use gift cards, relevance matters: the brands you offer should match where participants actually shop. If you don’t know your audience’s preferences, letting people choose from a wide selection of brands is a safer bet than guessing.
Non-monetary incentives
Charitable donations, experiences, and physical gifts can work when they align closely with the audience or the purpose of the research. For example, participants in a health survey might value a donation to a related patient advocacy group. Their appeal is less consistent than that of monetary rewards, making them a riskier choice if you’re recruiting from a broad audience pool.
Non-monetary incentives can also be harder to manage at scale. Mailing physical gifts to hundreds of participants takes more time and coordination than sending a digital reward.
If you're considering a non-monetary incentive, test it against a monetary option with your audience before committing your full budget.
Lotteries, raffles, and prize draws
Non-guaranteed incentives, such as lotteries, raffles, and prize draws, can reduce costs because you reward only a subset of respondents. The tradeoff is that they might not motivate as many people to participate as a guaranteed incentive would.
In a 2023 study, more than 38,000 university students were randomly assigned to one of three incentives: a guaranteed $5 Amazon gift card, a drawing for one of four $500 prizes, or a drawing for one of 20 prizes worth $100 each. The gift card produced higher response rates than either prize draw, but the prize draws had lower overall costs and a lower cost per completed survey.
The guaranteed incentive also reduced the number of people who quit partway through, while respondents offered the high-payout prize draw were more likely to skip questions. That suggests guaranteed rewards might also help reduce incomplete responses.
If keeping costs low is your top priority, lotteries are a strong option. But if you need to maximize responses, a guaranteed reward is usually the better choice.
How much should you pay survey participants?
No single amount works for every survey. The right incentive value depends on several factors, including:
Study length: Longer surveys generally warrant higher incentives, but the increase doesn’t need to be proportional to the added time.
Effort required: If your survey asks for more demanding tasks, like mental math or long open-ended answers, plan to offer more.
Topic sensitivity: Participants might expect higher incentives for surveys about personal subjects, like health or finances.
Audience: Hard-to-reach groups, such as executives or professionals with niche expertise, may expect more.
It’s worth testing a few incentive levels with a small group before a full launch.
Does incentive timing actually matter?
Incentives usually follow one of two timing structures:
Prepaid incentives go out before or at the start of a study, regardless of whether the participant completes it.
Promised incentives are sent upon completion, so you reward only people who follow through.
Research is mixed on which one works better.
Some studies suggest that prepaid incentives produce higher response rates. One possible explanation is reciprocity: receiving a reward upfront can make people more inclined to return the favor. In one study, a $2 prepaid incentive outperformed $10 and $20 promised incentives on response rate and cost less per completed response.
Other studies have found little difference. A Harvard experiment with more than 3,000 participants showed that any monetary incentive increased response rates compared to no incentive. But when the amounts were equal, prepaid and promised incentives performed about the same. A separate study of follow-up survey responses in a long-term medical trial reported similar participation rates for both approaches.
Tremendous research also found no significant difference in participant preferences between upfront and post-completion compensation.
Prepaid incentives can make sense when your audience has no prior relationship with your brand and needs more reassurance to trust you. If your audience already knows you, a promised incentive is often the more efficient use of budget.
Whatever you choose, tell participants when to expect their incentive and follow through quickly.
Other factors that influence survey response rates
The value of the incentive plays a big role in whether someone decides to participate, but it's only one of several factors that influence survey response rates.
Survey length is a major one, with interest dropping as studies get longer. According to Tremendous research, 97% of participants said they were likely to join a 10-minute study. That fell to 73% for a 30-minute study and 40% for a 45-minute study.
Shorter surveys make recruiting easier. If your survey needs to run long, give participants an accurate time estimate upfront so they know what they’re signing up for.
Mismatched expectations can also hurt participation. Among participants who regretted joining a study, 63% said it took much longer than estimated, and 52% said the incentive was lower than expected. Being clear about both from the start helps participants decide the survey is worth their time.
Finally, look for friction in the survey itself. Before launch, check for:
Confusing or contradictory instructions
Long or frustrating screeners
Technical glitches
Poorly communicated eligibility criteria
If you’re seeing low response or completion rates, incentives might not be the problem. Take a critical look at the survey experience. Fixing a clunky flow or confusing instructions might do more than simply increasing the incentive amount.
How to build a more effective survey incentive strategy
Putting this research into practice comes down to a few key decisions you’ll make before your survey goes live. Here’s how to approach each one:
Choose an incentive type based on your goals: When maximizing response rate is most important, offer a guaranteed monetary reward. But when budget is more important, a lottery or prize draw can lower costs, though you might get fewer responses.
Set the amount based on the ask: Consider survey length, effort, topic sensitivity, and how difficult it is to recruit your audience.
Prioritize flexibility and choice: When you're not sure what participants want, give them options. Flexible monetary rewards or a wide choice of gift cards can help account for preferences you can’t predict.
Match timing to your audience: Prepaid incentives can help you build trust with participants who are unfamiliar with your brand. Rewarding them upfront shows your commitment before asking for theirs. If your audience already knows you, promised incentives can help you avoid rewarding people who don’t finish the survey. Whichever you choose, tell participants when to expect their reward and deliver it on time.
Once your survey is live, track response rate, completion rate, and cost per completed response to see whether your incentives are landing. Look for patterns in drop-off, too. A recurring drop at the same point could signal a technical issue or a poorly worded question.
Every audience responds a little differently, so treat each study as a chance to learn what works for yours. Start with these decisions, track the results, and let the data from your own studies tell you what to adjust next.
