Do You Pay Taxes on Clinical Trial Compensation?

If you receive compensation for taking part in a clinical trial or research study, you might be wondering whether you owe taxes on it. In the United States, the general answer is yes: payments for your time and participation are usually considered taxable income.

This guide explains how study payments are typically handled, what tax forms you might receive, and what to keep track of. Tax rules can change and depend on your personal situation, so use this as a starting point and confirm the details with a tax professional or the IRS.

Why study payments are usually taxable

The IRS generally treats money you receive for participating in research — for your time, inconvenience, and effort — as income. It does not matter whether the payment comes as a check, a prepaid card, a direct deposit, or a gift card. Gift cards and prepaid cards are generally treated the same as cash for tax purposes.

For most people who take part in research occasionally, this income is typically reported as "other income" on their federal tax return rather than as wages. Because study payments are not usually treated as a paycheck, no taxes are typically withheld when you are paid. That means you may owe tax on it when you file.

Payments versus reimbursements

Not every dollar you receive from a study is necessarily handled the same way.

• Compensation is payment for your time, effort, and inconvenience. This is generally taxable.
• Reimbursement pays you back for specific out-of-pocket costs, such as mileage, parking, or a hotel stay, often based on receipts.

Reimbursements for documented expenses are often treated differently from compensation, but how they are reported depends on how the study site or sponsor structures and records the payment. Some studies pay a flat "travel stipend" that is not tied to actual receipts, and that may be reported as part of your compensation.

Ask the study team: "Which of these payments are compensation, and which are reimbursements? How will each be reported?" Keep any receipts you submit.

Tax forms you might receive

If your study payments for the year reach the IRS reporting threshold, the sponsor, research site, or payment company may send you a Form 1099-MISC early the following year. A copy is also sent to the IRS.

For many years, the reporting threshold for this kind of payment was $600 in a calendar year. Recent federal legislation raised the threshold for payments made in 2026 and later. Because these thresholds can change, check current IRS guidance or ask the payer what threshold they use.

Two important points:

1. You may not receive a form. If your total payments from a single payer were below the threshold, you may not get a 1099. The income is still generally reportable.
2. Payments from different studies may be reported separately. If you took part in studies with several different sponsors or sites, you could receive several forms — or none, if each payer stayed below the threshold.

Why the study may ask for your Social Security number

To issue a 1099, the payer needs your taxpayer identification number, usually your Social Security number (SSN). Legitimate studies typically ask for this on a Form W-9 or a similar secure form after you have enrolled, through the research site's official process.

Be cautious if anyone asks for your SSN before you have been screened, through a text message or social media, or alongside requests for money. Those are common scam warning signs. If you are unsure, call the research site using a phone number you look up yourself and confirm the request is real.

How study payments can affect benefits

If you receive means-tested government benefits, study compensation may count as income for those programs. Depending on the program and your state, it could affect eligibility for benefits such as Supplemental Security Income (SSI), Medicaid, or the Supplemental Nutrition Assistance Program (SNAP).

Rules vary by program, and some programs have specific exclusions, so:

• Ask the agency that manages your benefits how research payments are counted.
• Report the income if your program requires it.
• Ask the study team whether they can provide a letter describing the payments, which can help with reporting.

Do this before you enroll if the study offers significant compensation.

State taxes

Many states also tax income from study participation, and the rules vary. If your state has an income tax, check whether research compensation must be reported on your state return.

What to keep for tax time

A simple record-keeping habit can save time and stress later:

• A list of each study you joined, with the sponsor or site name
• The dates and amounts of each payment
• Whether each payment was compensation or reimbursement
• Copies of any receipts submitted for reimbursement
• Any 1099 forms you receive

A notes app or simple spreadsheet works well. If you take part in several studies in one year, this record makes it easier to report your income accurately.

Common questions

I was paid with a gift card. Is that still taxable? Generally, yes. Gift cards are usually treated like cash for tax purposes.

I did not get a 1099. Do I still need to report the payment? Generally, yes. Not receiving a form does not usually mean the income is tax-free.

Can I deduct my travel costs? It depends on your situation and current tax law. If the study reimbursed your costs, you generally cannot claim them again. A tax professional can tell you what applies to you.

Does it matter if I left the study early? You generally report what you were actually paid during the year, regardless of whether you finished the study.

The bottom line

For most people in the U.S., money received for taking part in research is taxable income — even if it comes as a gift card and even if you never receive a tax form. Keep records of what you receive, understand which payments are reimbursements, and check how payments affect any benefits before you enroll.

Because tax situations vary, consider speaking with a qualified tax professional or reviewing current IRS guidance, especially if you receive substantial study compensation in a year.

*This article is for general information only and is not tax, legal, or financial advice. Tax rules change and depend on individual circumstances.*