Healthy volunteers and paid clinical trials: what to know before you search.
People often use phrases like healthy volunteer, healthy control, and paid study interchangeably, but they are not the same thing. This page explains how this site handles that topic and what still needs direct confirmation from the official study record or the study team.
What “healthy volunteer” means here
On this site, healthy volunteer means the public ClinicalTrials.gov record explicitly says the study accepts healthy volunteers.
That does not automatically mean the study is a classic control group, low burden, inpatient, outpatient, or paid.
Some healthy volunteer studies are baseline or comparison studies. Others are phase 1 pharmacokinetic, safety, device, imaging, vaccine, behavioral, or physiology studies.
What this site can help you do
Start from the healthy volunteer hub to focus only on studies whose public record accepts healthy volunteers.
Narrow by city, state, sponsor, recruitment status, phase, study type, sex, or age before opening the official record.
Use the official ClinicalTrials.gov page as the source of truth for current availability, eligibility, contacts, schedules, and next steps.
What the API can and cannot show
The ClinicalTrials.gov API provides a structured field for whether a study accepts healthy volunteers. This site uses that field, along with recruitment status, location, phase, study type, age range, sex, sponsor, enrollment, interventions, update dates, and the official study URL.
The API does not provide a reliable dollar amount, payment schedule, travel reimbursement rule, or tax-treatment field that can be filtered consistently across studies.
Some official records include consent forms, protocols, or study materials that mention payment or reimbursement. This directory does not estimate dollar amounts from free text or PDFs because that would be incomplete and easy to misread.
How to find relevant opportunities
Start with recruiting studies: the healthy volunteer hub starts there by default, then lets you broaden to other statuses if you want to research upcoming or completed records.
Add location deliberately: use city and state filters only when you need local options. A U.S.-wide search can surface remote, multi-site, or travel-dependent records that may not be practical.
Use phase and study type as context: phase 1, interventional, observational, device, imaging, vaccine, and behavioral studies can have very different time burdens and risk profiles.
Open the official record: check eligibility criteria, contacts, official documents, visit schedule, and current recruitment status before contacting a study team.
What this site cannot promise about compensation
This directory does not currently expose a standardized compensation amount because the public ClinicalTrials.gov fields used here do not provide one as a stable, consistently structured filter.
Some studies mention payment, travel reimbursement, screening compensation, stipends, or tax reporting in consent forms or study materials. Others do not publish that information clearly in the same place or in the same format.
Because of that, you should not assume a study is paid, unpaid, high paying, or worth the time burden based on this directory alone.
What to confirm directly
Payment amount: per visit, per day, completion bonus, or reimbursement only.
Time burden: inpatient days, overnight stays, washout periods, return visits, and follow-up calls.
Eligibility details: smoking status, BMI, medications, prior study participation windows, lab values, and other exclusion rules.
Practical details: travel reimbursement, parking, direct deposit or prepaid card, and whether any payment may be reported for tax purposes.
Safety and consent: procedures, expected discomfort, restrictions, side effects, privacy terms, and how to leave the study after enrollment.
Bottom line
If you are a healthy person trying to find studies, this site can help you find a narrower set of relevant public records faster than starting from a blank search.
If you care specifically about whether a study pays, how much it pays, or how the payment works, you still need to verify that directly with the official record and study team.
This site is an independent directory and is not affiliated with ClinicalTrials.gov, NIH, NLM, FDA, study sponsors, hospitals, or investigators.