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How Paid Clinical Trials Work
Participating in paid research is straightforward. Here's what to expect from start to finish.
1

Find a Study

Browse paid trials on TrialConnect. Filter by location, duration, and compensation. Read the full study details and requirements.

2

Health Screening

Attend a free screening visit. Medical staff check your vitals, blood, ECG, and medical history to confirm you're eligible and healthy.

3

Participate

Take the study treatment under medical supervision. Residential units provide private rooms, meals, WiFi, and entertainment.

4

Get Paid

Receive compensation by bank transfer, typically within 2–4 weeks of completing the study. Compensation is usually tax-free.

Types of Paid Clinical Trials
From short outpatient visits to month-long residential stays — there's a paid study for almost everyone.
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Phase 1 Healthy Volunteer

Test new medicines for the first time in humans. You'll be among the first to receive cutting-edge treatments. Full medical supervision in dedicated research units.

£2,000 – £5,000+
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Residential / Overnight Studies

Stay at a clinical research unit for several nights. All meals, accommodation, and entertainment provided. Ideal if you have flexible schedule between jobs or studies.

£1,500 – £4,000
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Outpatient Visits

Attend regular appointments at a research site — typically half-day visits. No overnight stays required. Great for people who want to continue working.

£50 – £500 per visit
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Bioequivalence Studies

Compare generic medicines to branded versions. Often shorter studies with fewer restrictions. One of the most common paid trial types in the UK.

£1,000 – £3,000
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Vaccine & Challenge Studies

Test new vaccines or help researchers understand viruses. FluCamp and similar units specialise in these studies. Higher compensation reflects the commitment.

£2,500 – £5,000+
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Patient-Specific Trials

Have a medical condition? Many trials compensate patients for their participation. Search by your condition to find trials that pay while potentially accessing new treatments.

£200 – £3,000
Top UK Clinical Research Units for Paid Studies
These are the major facilities where paid healthy volunteer trials take place across the UK.
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Quotient Sciences

Translational clinical development with healthy volunteer studies

📍 Nottingham & Ruddington
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hVIVO (FluCamp)

World-leading viral challenge studies and vaccine research

📍 London (Whitechapel)
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Parexel Early Phase

Global CRO with large Phase 1 healthy volunteer unit

📍 London (Harrow) & Leeds
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Labcorp Drug Development

Formerly Covance — one of the largest Phase 1 units in Europe

📍 Leeds
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Simbec-Orion

Specialist early-phase and bioequivalence clinical research

📍 South Wales (Merthyr Tydfil)
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Hammersmith Medicines Research

Phase 1 unit with decades of healthy volunteer experience

📍 London (Hammersmith)
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Richmond Pharmacology

Early-phase clinical trials with state-of-the-art facilities

📍 London (St George's Hospital)
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Manchester CRF

NHS Clinical Research Facility at Manchester University

📍 Manchester
Eligibility for Paid Trials
Most paid healthy volunteer studies have similar basic requirements.

✅ Typical Requirements

  • ✓ Aged 18–80 (most common: 18–55)
  • ✓ Good general health
  • ✓ BMI 18.5–30 (healthy range)
  • ✓ Non-smoker or light smoker
  • ✓ Not on regular medication
  • ✓ Willing to use contraception

⚠️ May Exclude You

  • ✗ Significant medical conditions
  • ✗ Regular prescription medications
  • ✗ Recent blood donation (<3 months)
  • ✗ Recent participation in another trial
  • ✗ Heavy alcohol or recreational drug use
  • ✗ Pregnancy or breastfeeding

📋 Screening Includes

  • • Full medical history review
  • • Blood tests (haematology, biochemistry)
  • • Urine drug screen
  • • ECG (heart rhythm)
  • • Blood pressure and vitals
  • • Physical examination
Frequently Asked Questions
Everything you need to know about getting paid to participate in clinical trials.
How much do paid clinical trials pay in the UK?
Compensation varies by study type and duration. Outpatient studies typically pay £50–£500 per visit. Overnight residential studies pay £500–£5,000+ depending on length (3–30 nights). Phase 1 trials in dedicated clinical research units are the highest paying, often £2,000–£5,000 for a complete study involving multiple overnight stays.
Can anyone volunteer for paid clinical trials?
Most paid studies for healthy volunteers require you to be 18–80 years old, in good general health, a non-smoker (or light smoker depending on the study), not taking regular medications, and with a BMI within the healthy range (typically 18.5–30). Each study has specific eligibility criteria that you'll be screened for during your initial visit.
Are paid clinical trials safe?
Yes. All clinical trials in the UK are regulated by the Medicines and Healthcare products Regulatory Agency (MHRA) and must be approved by an ethics committee. Phase 1 trials for healthy volunteers involve extensively tested compounds with rigorous safety monitoring, medical supervision 24/7 during residential stays, and full informed consent processes. You can withdraw from any trial at any time.
What happens during a paid clinical trial?
You'll attend a screening visit for health checks (blood tests, ECG, vitals). If accepted, the study may involve taking a study drug or placebo, regular blood samples, vital sign monitoring, and questionnaires. Residential studies include private or shared rooms, all meals provided, WiFi, and entertainment facilities. You can withdraw at any time.
Where are paid clinical trials conducted in the UK?
Major paid clinical trial units are located in London, Leeds, Manchester, Nottingham, Cambridge, and other UK cities. Notable units include Quotient Sciences (Nottingham), hVIVO/FluCamp (London), Parexel (London/Leeds), and Labcorp Drug Development (Leeds). Many are conveniently located near public transport.
Do I need to pay tax on clinical trial payments?
In the UK, payments for participating in clinical trials are generally classified as compensation for your time and inconvenience rather than income, so they are typically tax-free. However, if clinical trial participation becomes your primary source of income (which is unusual), HMRC may treat it differently. Always check with a tax advisor for your specific situation.
How long do paid clinical trials last?
Duration varies widely. Outpatient visits may be single half-day sessions. Residential studies range from 2 nights to 4+ weeks, often split into multiple periods with breaks in between (called "washout periods"). The total commitment including screening, treatment periods, and follow-ups can span several weeks to months.
Can I do more than one paid trial?
Yes, but not simultaneously. Most studies require a "washout period" of 30–90 days between trials to ensure the previous study drug has completely cleared your system. Research units track your participation history to ensure compliance. Some frequent volunteers earn £10,000–£15,000 per year by spacing studies appropriately.

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