How often can you donate plasma legally?

The FDA allows plasma donation up to twice per 7-day period, with at least 48 hours between donations. This equals a maximum of about 104 donations per year, though the FDA caps the annual total at 110 liters of plasma. Most regular donors donate 6–8 times per month. The 48-hour minimum exists because your body needs time to replenish plasma proteins (primarily albumin, immunoglobulins, and clotting factors). Donating more frequently than twice per week has been linked to protein deficiency and increased side effect rates — the limit exists to protect donor health, not just to regulate supply.

What is plasma used for after donation?

Donated plasma is used to manufacture plasma-derived medicines (PDMs) that treat life-threatening conditions: immunoglobulin therapy for immune deficiencies, hemophilia A and B treatment (clotting factors VIII and IX), alpha-1 antitrypsin therapy for hereditary lung/liver disease, albumin for trauma and burn patients, and rabies/tetanus hyperimmune globulins. The US supplies approximately 70% of the world's plasma-derived medicines, largely because the US is one of the few countries that compensates plasma donors — higher compensation drives higher donation volume. Your plasma donation directly contributes to treatment of patients with rare, chronic diseases.

What disqualifies you from donating plasma?

Permanent disqualifications: HIV/AIDS, hepatitis B or C, human T-cell lymphotropic virus (HTLV), certain cancers, Creutzfeldt-Jakob disease (CJD), history of IV drug use, and a history of receiving money for sex. Temporary deferrals vary by center and condition: recent tattoos or piercings (3–12 months), pregnancy and postpartum (6 months), recent illness or fever (recover fully first), active antibiotic treatment, recent travel to malaria zones (12 months), and some medications. Low hematocrit (iron) is the most common deferral reason for regular donors — addressable through diet and supplementation.

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Frequently Asked Questions

Q: How accurate are your earnings estimates?

A: We update our pay rates weekly based on multiple sources including center websites, donor reports, and direct verification. Our calculator provides highly accurate income estimates, but we always recommend confirming current rates with centers before donating.

Q: Do you store my earnings calculation data?

A: No, all income calculations are performed locally in your browser. We do not collect or store any personal information from our earnings calculator or eligibility quiz.

Q: Can you help me maximize my plasma donation earnings?

A: Yes! Check our earning tips section for strategies to maximize your income. For specific questions about optimizing your earnings, email us or use our calculator to explore different scenarios.

Q: How can I report incorrect pay rate information?

A: Please use the contact form above and select "Report an Error" as the subject. Include the center name, location, and the correct pay rate information along with any supporting documentation if available.

Q: Can you help me find the highest-paying centers?

A: Use our earnings calculator to compare potential income at different centers. Input your location and weight to see which centers offer the best earning opportunities in your area.

Q: Can you help me choose the best center for maximum earnings?

A: We provide earning comparisons and calculations, but the best center depends on your weight, location, and schedule. Use our calculator to compare potential monthly income at different centers near you.

Four things that stop you losing a payment

A deferral costs the whole visit, and almost all of them come down to iron, protein or hydration. These are the cheapest ways to keep yourself eligible.

Nature Made Iron 65 mg Tablets Under $25 Low hematocrit is the most common reason a donation gets turned away, and a deferral costs you the whole visit. This is the cheapest insurance against losing a payment. Check price on Amazon →

Optimum Nutrition Gold Standard Whey Under $50 Plasma is mostly protein, and low protein is the second most common deferral. A scoop a day is far cheaper than a wasted trip. Check price on Amazon →

Ultima Replenisher Electrolyte Packets Under $25 Hydration is what decides whether the draw runs fast or you sit there for an hour. Electrolytes work better than plain water for this. Check price on Amazon →

Compression Arm Sleeves Under $25 Wearing one after the draw is the simplest thing that reduces bruising, which is what makes frequent donors stop. Check price on Amazon →

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Researched guidance, not medical advice. Talk to the centre's staff about supplements before a donation.

Donation-day pick

Keep your next payment safe

Most deferrals come down to protein, iron or hydration. One thing worth having ready before your next visit.

Optimum Nutrition Gold Standard Whey Protein, 5 lb Plasma is mostly protein, and low protein is one of the most common reasons a visit gets turned away. A scoop a day is a simple way to protect the payment. Check price on Amazon →