How advocacy groups can push for clinical trial reimbursement

Clinical trial reimbursement determines whether many people can afford to take part in research. The study drug and research-only tests are usually provided at no cost, but participants often pay for travel, lodging, parking, meals, and childcare themselves, and many lose wages for every visit. When those costs are not repaid, they become financial barriers that keep willing volunteers out of studies.

Patient advocacy groups are well placed to change this. They hear from members who declined a study because of cost, and they have a voice with the sponsors and research sites that decide what participants receive. This article explains the financial barriers participants face, how reimbursement works, where it falls short, and how advocacy groups can advocate for stronger participant support.

What financial barriers do clinical trial participants face?

The costs of joining a study are rarely medical. They come from getting to and staying at the research site, often many times over months or years. Common out-of-pocket costs include:

• Travel, including fuel, airfare, public transit, and rideshares
• Parking at the hospital or clinic
• Hotel stays for visits that require an overnight stay or an early start
• Meals during long visit days
• Childcare or care for a dependent family member
• Lost wages from missed work, for the participant and for any caregiver

These costs fall hardest on lower-income households, rural residents who live far from major medical centers, and people who need a caregiver to travel with them. In a 2026 national survey of cancer patients and survivors conducted by a cancer advocacy organization, nearly all respondents said distance to the trial site was an important factor in deciding whether to join. Earlier research from a national cancer research network found that lower-income patients enrolled in trials at lower rates even after accounting for travel distance.

The effect reaches beyond individuals. When only people with savings, flexible jobs, and short commutes can participate, studies stop reflecting the communities that will use the results. Reducing participant burden is one of the first steps in building a diverse enrollment pipeline.

How does clinical trial reimbursement work?

Reimbursement means repaying participants for documented expenses caused by taking part in a study, such as mileage, airfare, parking, and hotel stays. Its purpose is to leave participants financially even, not ahead. It is different from compensation, which is payment for time and effort, often a set amount per visit.

Each study’s sponsor decides what to reimburse and how, and an Institutional Review Board (IRB), an independent ethics committee, reviews the plan. The details appear in the informed consent document, the form that explains a study before a person agrees to join.

Some sponsors book travel and lodging in advance. Others repay receipts after each visit, load funds onto a reloadable payment card, or pay a flat amount per visit. Studies that add telehealth check-ins, home health visits, or local laboratory testing can also lower costs by reducing how often participants travel, although remote options raise their own access questions covered in a digital inclusion checklist for decentralized trials.

Reimbursement is ethically accepted. The U.S. Food and Drug Administration (FDA) has stated that repaying travel and associated costs such as airfare, parking, and lodging does not raise concerns about undue influence, meaning an offer so large that it could lead someone to overlook a study’s risks. Repaying expenses is not paying people to take risks. It simply stops them from paying to contribute to research.

Where does clinical trial reimbursement fall short?

Reimbursement is allowed, but it is not required, and support varies widely between studies. In the same 2026 survey, fewer than one in three respondents who had taken part in a trial reported receiving any financial support from the sponsor.

Several gaps leave participants exposed:

• No federal rule requires sponsors to cover nonmedical costs such as travel, lodging, or childcare. Insurance laws require coverage of routine medical care in qualifying trials, not these expenses.
• Repayment often arrives weeks after a visit, so participants must have the money to pay first. Most patients surveyed in 2026 preferred having costs paid up front, and very few preferred reimbursement afterward.
• Lost wages and caregiver costs are often not covered at all.
• Compensation is generally taxable and can count as income for programs such as Supplemental Security Income (SSI) and Medicaid. The only permanent exception excludes up to $2,000 per year in compensation from rare disease trials.
• Uncertainty under federal anti-kickback rules has led some sponsors to limit support for people enrolled in Medicare or Medicaid.

Rare disease communities, whose members often travel long distances to a small number of sites, feel several of these gaps at once. This is one reason advocacy partnerships in rare disease recruitment increasingly address cost alongside awareness.

How can advocacy groups advocate for participant support?

Advocacy groups influence participant support at four points: conversations with sponsors, study design, member education, and public policy.

Ask sponsors for a participant support budget

Sponsors often consult advocacy organizations during protocol development, through patient advisory boards, or before asking a group to share a study with its community. That is the best moment to raise reimbursement, because support is far easier to build into a budget before enrollment begins. Requests can include:

• Coverage of travel, lodging, meals, parking, childcare, and caregiver travel
• Prepaid or directly booked travel instead of reimbursement after the fact
• Fast repayment with clear timelines and no fees charged to the participant
• Payment that builds visit by visit rather than depending on finishing the study, as FDA guidance recommends

Push for fewer and closer study visits

Every in-person visit costs participants money. Advocacy groups can use member feedback to argue for fewer site visits, local laboratory testing, telehealth check-ins, and home visits where the study allows. Evidence from their own communities about distance, work schedules, and caregiving makes these requests specific and harder to dismiss.

Teach members what to ask

Many people sign a consent form without reading the payment section closely. Advocacy groups can share a short list of questions for members to ask the research team:

• Which costs are reimbursed, and are travel and lodging booked in advance?
• How quickly is repayment made, and by what method?
• Is a caregiver’s travel covered?
• What happens to payment if a participant leaves the study early?
• How are payments reported for taxes, and could they affect public benefits?

Groups already doing this work can build on approaches for helping people navigate clinical trials. Members who rely on public benefits should also be encouraged to speak with a benefits counselor before enrolling.

Support policy change

As of October 2026, bipartisan bills introduced in Congress would exclude a limited amount of trial payments from taxable income and benefits calculations and confirm that sponsors may cover nonmedical costs. None has become law. In June 2026, the U.S. Department of Health and Human Services also requested public input on legal protections for sponsor support to participants, and many patient organizations submitted comments. Advocacy groups can track these efforts, share member experiences, and comment when formal rulemaking opens.

Frequently asked questions

Is clinical trial reimbursement the same as being paid to participate?

No. Reimbursement repays documented expenses such as travel and parking. Compensation pays for time and effort. A study may offer one, both, or neither, and the consent document should explain which.

Do all clinical trials reimburse travel costs?

No. Reimbursement is allowed but not required, and coverage varies by study. Anyone considering a study should ask the research team what is covered before enrolling.

Is clinical trial reimbursement taxable?

Repayment of documented expenses is generally treated differently from compensation, which is usually taxable. For payments made after December 31, 2025, the federal Form 1099 reporting threshold is $2,000. That is a reporting rule, not a tax exemption. This is general information, not tax advice.

What should an advocacy group check before endorsing a study?

Reimbursement terms belong on the review list alongside visit burden, eligibility criteria, and how participant data will be handled. Groups can pair a cost review with the data governance questions worth asking before an endorsement.

Making participant support standard in clinical research

Financial barriers come from budget and design decisions, which means they can be changed. Advocacy groups that raise reimbursement early and consistently help make participant support an expected part of every study rather than an exception.

DecenTrialz is a clinical trial recruitment, pre-screening, and participant management platform that works with advocacy groups to connect community members with relevant studies. AI-assisted matching compares a person’s information against active trial criteria, a registered nurse conducts pre-screening, and a structured referral goes to the research site team, with status visibility returned to partner organizations.

Final eligibility determination, informed consent, and enrollment remain with the authorized research site and study team.

DecenTrialz does not set, pay, or guarantee reimbursement or compensation. Those terms come from each study’s sponsor and site. Advocacy organizations interested in partnering can learn more at decentrialz.com.