A practical guide to research incentives
By Kathryn Casna●7 min. read●Oct 16, 2026
You should (almost) always offer research incentives in return for a participant’s time and feedback. It’s the right thing to do. Plus, incentives make research easier and better.
Research incentives are rewards offered to study participants in exchange for their time and feedback. They typically take the form of monetary options, prepaid cards, gift cards, charitable donations, or physical gifts. Offering them is standard practice across market research, UX research, academic studies, and clinical trials.
The most effective incentive is often money. But not always.
“I am of the mindset that you should always pay a [participant] for their time,” said Roberta Dombrowski, former head of UXR at User Interviews. “Because incentives actually encourage people to show up, and you’re showing them that they’re giving value.”
Key takeaways
Incentives work: A 2023 meta-analysis found they lift survey response rates by up to 25%, and they often improve data quality too.
Best incentive type: Cash and cash equivalents suit most participants, but tailor your approach to the population.
How much to pay: It depends on study type, length, and participant profile. Our incentive calculator can help.
Building a program: Pick the incentive, set the amount, decide timing and delivery, and spell out the terms during consent.
Ethical considerations: Calibrate rewards to participant burden, not study sensitivity, and take extra care with vulnerable groups.
Tax obligations: Research incentives are taxable. Collect W-9s before participants reach $2,000 in a calendar year.
How to send them: Platforms like Tremendous manage global delivery, W-9 collection, and 1099 data in one place.
The role of incentives in research
Few people opt to participate in research on their own. Those who do tend to be the squeaky wheel. Researchers use incentives (like money, physical gifts, or rhetorical appeals) to motivate those who wouldn’t normally participate.
And incentives work. A 2023 meta-analysis of 46 randomized controlled trials found that money lifted survey response rates by 25% compared to offering nothing (a rate ratio of 1.25, in the study’s terms). Vouchers (19%) and lotteries (12%) also helped, just less.
The payoff goes beyond response rate. Incentives bring in participants who show up and finish, reach groups that are hard to recruit, and give you a sample that looks like the population you’re studying. They also answer the objection most people have to a 45-minute interview: what’s in it for me?
“If you’re not compensating people for their feedback, one, they are a lot less likely to give you any in the first place. So you’re fighting to get it,” said Holly Cole, CEO of the Research Operations Community. “Two, the feedback that you do get is going to be lower quality, because free information is horribly biased.”
But incentives are just one of many factors that influence response rate. Survey methodologist Don Dillman’s Tailored Design Method lays out six ways to optimize for response rate and quality:
Contact participants in multiple ways: email, phone, and snail mail.
Simplify and shorten your study: attention spans are short, so cut your study to focus on the questions that matter most. Chances are, more people will participate (and finish) it.
Send research incentives: participants are giving you valuable feedback. Compensate them for it.
Contact people multiple times: be strategic about how often and when you reach out. The cadence and frequency matter.
Explain the “why”: in all comms, explain the purpose of the survey, why the participant was selected, and other details that show why the research matters.
Tailor tactics to your audience: meet people where they’re at. Some populations have less access to computers, so mailed or telephone surveys may be preferable.
Understanding the incentives in your arsenal
There are plenty of ways to reward research participants:
Monetary options like PayPal, Venmo, or direct deposit
Prepaid Visa cards (physical or digital)
Gift cards (physical or digital)
Entry into a prize drawing
Coupon codes or discounts
Physical gifts or product giveaways
Charitable donations on the participant’s behalf
Course credit (for students in university studies)
Any of these can work. The best fit depends on your study, your goals, your methodology, and who you’re recruiting. Participant populations differ by geography, culture, income, and plenty else. What motivates one panel won’t move another.
Monetary incentives are king
The industry was once reliant on checks, paper cash, and physical gift cards. The pandemic pushed many to adopt digital payment methods. That’s true of UXR, market research, academia, and clinical trials.
Researchers most often send Amazon.com gift cards. Tremendous conducted two surveys: one in 2022 of 368 Tremendous clients and a second in 2023 of 166 researchers. Both indicate an overwhelming use of Amazon.
We also conducted a conjoint analysis of recipient preference. If given a choice, recipients want a digital monetary option or a Visa prepaid card over a gift card to a specific retailer.
Charitable donations are also a powerful research incentive. Often, recipients can’t accept incentives (or aren’t motivated by small dollar amounts). But a donation to a worthy cause might motivate.
Why does money outperform? Participants know exactly what they’re getting, they get it fast (especially when it’s sent digitally), and they can put it toward whatever they need. Nothing else checks all three boxes.
Non-monetary incentives are equally important
“So many people disregard the fact that one in sixteen people in the United States works for the government,” Holly said. “You can’t pay them. But can you make a donation? Can you do volunteer days?”
Paying isn’t always appropriate, allowed, or within budget. Instead, try piquing intellectual curiosity: explain to participants how they’re furthering a body of knowledge, or provide early access to the findings.
Alternatively, offer physical gifts: a sticker, a magnet, a tote bag, or exclusive swag. Perhaps an inexpensive electronic device. For small sample sizes, a personalized gift may be apt.
A chance to win
Lotteries or sweepstakes can be effective research incentives, particularly for the budget-constrained.
The same 2023 meta-analysis cited above found lotteries lifted response rates by 12%, less than guaranteed money but well above nothing. A 2025 experiment with more than 11,000 Norwegian graduates came to a similar conclusion: both conditional and unconditional lotteries modestly boosted response without making the sample more or less representative. And announcing the lottery in your email subject line raises contact and response rates compared to leaving it in the body.
Lotteries are ideal for tight budgets, as they turn incentives from a variable cost (dependent on sample size) to a fixed cost.
Tremendous is built for exactly this kind of flexibility. You can send PayPal and Venmo payouts, Visa prepaid cards, gift cards, charitable donations, and more from one platform to participants in 200+ countries and regions. Whatever incentive fits your study, you can deliver it without switching tools or wiring funds manually.
How much should you pay research participants?
There’s no universal rate. What you pay depends on the study type, how long it takes, and who you’re recruiting. A five-minute screener survey warrants a very different incentive than a 90-minute moderated interview with a specialized professional. Here’s a rough baseline to work from.
| Study duration | Baseline (Survey) | Students (-20%) | High earners ($200k+) (+46%) | Unemployed (Interaction/Payment Adjustments) |
|---|---|---|---|---|
| 15 Minutes | $26 | $21 | $38 | $47 |
| 30 Minutes | $48 | $38 | $70 | $69 |
| 60 Minutes | $69 | $55 | $101 | $90 |
These numbers come from our research on How much to pay research participants. As you can see, doubling the time commitment doesn’t need to double your budget. The longer your survey, the less additional money people expect per additional minute.
A few factors push rates higher. If you’re conducting interviews instead of surveys, add $8.66. If you’re asking about sensitive subjects (like health, finances, or personal trauma) for 30 minutes or more, add $3.40. For studies requiring prep ahead of time (study burden) or that pull from a niche pool of participants, expect to pay even more.
Use our research incentive calculator to get a recommendation based on your study type, duration, and participant profile.
How do you build a research incentive program?
If you’re thinking about incentives, you’ve probably already set a budget, established your research objectives, and decided who you’ll recruit. The next step is deciding how incentives will actually run, so you’re not improvising study by study.
1. Choose the incentive type
Start with what’s standard in your field and what your recruits expect. A panel of physicians expects something different from a panel of college students. When in doubt, let participants choose. A catalog means you don’t have to guess what a cardiologist wants versus a sophomore.
2. Set the amount
Use the baseline table above, then adjust for participant expertise, study burden, risk level, local norms, and whether the study is in person or remote. Most participants in a study get the same amount, but it’s reasonable to pay more for people who commit more time or who are harder to find.
3. Decide when and how often to send
Gallup research points to the effectiveness of sending a few dollars along with your initial outreach. It found that sending just $1 upfront is the most cost effective approach. As the theory goes, giving someone money in advance makes them feel obligated to reciprocate.
In practice, most teams pay on completion or use an escrow system. Companies that run large panels often add points systems to keep people coming back. Others pair a small prepaid incentive with a larger payment at the end. We suspect prepaying is less common than the research supports because handing over money with no guarantee of a response feels risky.
Study length should drive the schedule. A one-time incentive suits a short online survey. For multi-phase studies that run for weeks, spacing incentives across milestones keeps participants engaged and discourages dropouts. Focus groups and longer interviews are often compensated by the hour. Whatever you choose, write it down so your team applies it consistently.
4. Pick a delivery method
Small studies often handle this manually: printing and mailing checks, handing out envelopes of cash, or buying gift cards in bulk and emailing codes one at a time. The manual route costs more than it looks. Delivery takes days or weeks, someone has to track uncashed checks, and mail gets lost or intercepted.
Digital delivery solves most of this. Participants get their incentive in minutes, and you get a record of every send.
5. Spell out the terms during consent
Tell participants upfront what they’ll receive, how much it’s worth, when they’ll get it, and what happens if they withdraw partway through. Clear terms mean fewer ethics questions later, and fewer “where’s my gift card” emails.
Ethics of research incentives
Incentives, particularly money, can influence behavior. Here are the questions to settle before you launch.
What is undue influence, and how do you avoid it?
Undue influence (sometimes called undue inducement) occurs when an incentive is large enough to cloud a participant’s judgment about the risks or benefits of a study. The U.S. Office for Human Research Protections defines it as an offer of an excessive or inappropriate reward made to obtain compliance.
To avoid it, calibrate the incentive to the time and effort required, not to the sensitivity or stakes of the research. Asking about health, finances, or personal trauma warrants a modest premium (our research suggests about $3.40 for 30+ minutes). It’s not a reason to dramatically inflate the incentive. When in doubt, match the reward to the time commitment, not the subject matter.
Can research incentives create coercion?
No. Coercion has a specific definition: an overt or implicit threat of harm used to gain compliance. A federal advisory committee on human research protections states plainly that genuine offers of payment don’t meet that bar. Incentives offer a benefit, not a threat.
What incentives can create is undue influence (see above), which can raise ethical questions and affect the quality of your study. We cover the coercion question in more depth here.
How do incentives affect participant enrollment bias?
If certain populations are more motivated by an incentive than others, your sample will skew toward them, making it harder to draw conclusions that apply broadly.
A sample that doesn’t represent the population limits how much you can generalize from your results. In some cases, it creates a dynamic where higher-income researchers effectively study lower-income groups, which introduces its own exploitative bias.
The fix is variety. Different populations respond to different types of rewards, and a one-size-fits-all approach will introduce bias by design. Offering a range of options, or letting participants choose, helps you reach the people a single incentive would miss.
Can incentives attract the wrong participants?
Some people earn a side income by participating in studies regularly. There’s nothing wrong with that. The problem comes when those participants aren’t representative of the group you want to sample, or when they’re only there for the reward and don’t engage with the questions.
In extreme cases, when enough money is at stake, people will misrepresent their eligibility to get in. Tight screeners and a solid recruiting process help. So does a payout platform with built-in fraud detection, which can flag duplicate recipients and suspicious redemption patterns before the incentive goes out.
Special considerations for vulnerable populations
Some participant groups require extra care. Children can’t consent to research themselves, which means a financial incentive can pressure parents into enrolling kids in risky studies. The parent benefits financially while the child bears the risk. The common guidance for pediatric research is to reimburse parents for time and travel while keeping incentives small enough that they don’t distort parental judgment.
People in acute financial need face a similar dynamic: the money may override their honest assessment of a study’s burdens.
The research is less alarming than the worry. A 2022 study of children and young people in Australia found that modest payments increased participation without pushing kids toward higher-risk studies. Still, oversight bodies err on the side of caution, and so should you.
Research has a dark history here. The Tuskegee Syphilis Study and other ethically dubious human trials forced the U.S. government to act. The National Research Act (1974) established oversight boards, and four years later, The Belmont Report codified three principles that still govern research ethics today:
Respect for persons (informed consent)
Beneficence (do no harm)
Justice (non-exploitative procedures with costs and benefits distributed fairly)
These principles are now enforced through institutional review boards (IRBs), which oversee human-subject research at academic institutions, clinical trial sponsors, federal agencies, and other regulated entities.
Reframe the exchange
One practical step researchers take: drop the word “incentive” entirely. Atlassian and Airtable both call research incentives “thank-you gifts.” It changes the tone from a transaction to a thank-you.
“We don’t want to think of it as compensation, or an incentive exchange,” said Adele Wallrich, research operations manager at Airtable. “We want to make it about gratitude, and fostering that relationship with users.”
Are research incentives taxable?
Yes. In the U.S., research incentives count as taxable income for the recipient, whether they come as a gift card, a prepaid card, or a PayPal payout. Once a participant receives $2,000 or more from your organization in a calendar year, you’ll need a W-9 on file and a 1099-MISC ("Miscellaneous Information") at year-end. Our tax compliance guide for research programs walks through the details.
Tracking this manually across dozens of participants adds up fast. Platforms like Tremendous collect W-9s automatically when recipients cross the threshold and prepare 1099 data for you, so nobody’s chasing paperwork in January.
Note: Tremendous can’t provide tax or legal advice. Run your program plans past your company’s tax advisors to be sure you’re compensating participants in a way that’s fully compliant and optimized for your situation.
Research incentives don’t have to be a headache
Incentives drive participation and likely improve response quality. Cash (or an equivalent) is usually the best incentive, but different populations are motivated by different things.
So be flexible. Understand the ethical considerations and tax implications. Above all else, just find a way to show participants you appreciate their time and feedback.
