Last updated: October 2026 · Weight rules come from official center pages and the FDA. Pay amounts are set by each center and change often, so check your center’s app or fee schedule.
- Weight and pay: Yes, weight can affect pay. CSL Plasma says donor payments are based on your weight on the day of donation, in 5 weight groups from 110 lb to 230+ lb. Octapharma says pay is based on a mix of weight, height and hematocrit.
- Minimum weight: 110 lb (50 kg) at CSL Plasma, BioLife, Grifols, Octapharma and KEDPLASMA. This is also the FDA minimum.
- Why heavier donors can give more: The FDA volume chart allows up to 690 mL for 110-149 lb, 825 mL for 150-174 lb and 880 mL for 175 lb and up (totals include anticoagulant).
- Maximum weight: None of these five centers publishes an upper weight limit on its official site. Ask your local center.
- Exact pay: Centers do not publish one national pay-by-weight table. Rates vary by location, month and promotion.
If you weigh more, a plasma center may collect more plasma from you, and some centers pay more for that. But the rules are not the same everywhere, and most centers do not post a public pay chart. Here’s what we checked on cslplasma.com, octapharmaplasma.com, biolifeplasma.com, grifolsplasma.com, kedplasma.us and fda.gov this month.
Weight rules at the big US plasma centers (October 2026)
| Center | Minimum weight | Maximum weight published? | Does the official site link pay to weight? |
|---|---|---|---|
| CSL Plasma | 110 lb | No | Yes. Payments are based on your weight on donation day (5 groups) |
| Octapharma Plasma | 110 lb | No | Yes. Pay is based on weight, height and hematocrit |
| BioLife Plasma Services | 110 lb | No | Not stated on the pages we checked |
| Grifols Plasma | 110 lb (50 kg) | No | Not stated on the pages we checked |
| KEDPLASMA | 110 lb | No | Not stated; says each center has a slightly different compensation schedule |
All five centers also weigh you at every visit as part of the quick health check. Your weight that day is the one that counts.
How much plasma can be collected at your weight
The FDA allows plasma centers to use a simple weight-based chart (a “nomogram”) to set the most plasma that can be collected per donation. The figures below come from the FDA memo on the simplified volume nomogram. The collection volume includes the anticoagulant added during the donation.
| Donor weight | Plasma volume | Total collection volume (with anticoagulant) |
|---|---|---|
| 110-149 lb | 625 mL | 690 mL |
| 150-174 lb | 750 mL | 825 mL |
| 175 lb and up | 800 mL | 880 mL |
The top band is 175 lb and up. Under this chart, a 175 lb donor and a 300 lb donor have the same upper limit.
Some centers now use height and hematocrit too
CSL Plasma uses an “individualized nomogram” called iNomi at some centers. CSL says the target amount is set at each donation based on your height, weight and hematocrit (the share of red blood cells in your blood). Staff measure your height before your next donation and again at your yearly health check. CSL says some donors may see a change in how much plasma they give, and the target can differ from visit to visit.
Octapharma also says you donate “a volume of plasma based off your individual body chemistry,” and that the time a donation takes depends on your body weight and other factors.
Why heavier donors can be paid more
Plasma centers pay for your time, and the amount they can collect goes up with weight. That is why some centers use weight groups for pay.
- CSL Plasma: CSL’s FAQ says donor payments are based on a donor’s weight on the day of donation. With iNomi, CSL moved from 3 weight-based payment groups to 5: 110-139 lb, 140-169 lb, 170-199 lb, 200-229 lb and 230+ lb. CSL adds that payments may vary month to month, by location and for special promotions.
- Octapharma Plasma: Octapharma’s FAQ says payment is based on a combination of weight, height and hematocrit. It sends you to your local center for your specific pay scale.
- BioLife, Grifols and KEDPLASMA: The official pages we checked do not say pay depends on weight. KEDPLASMA says each center has a slightly different compensation schedule. Ask your center or check its app.
Do heavier donors get paid more for plasma?
Often yes, but not always, and not by a fixed amount. CSL Plasma and Octapharma both state on their official sites that weight is part of how pay is set. The other big centers do not say so on the pages we checked. None of these companies publishes a national dollar table by weight, and we won’t guess one. Pay also changes by city, by month and with promos. To see what you would get at your weight:
- Download your center’s app or log in to its donor account. Most show the current fee schedule or your next payment.
- Call or visit your local center and ask, “What is the pay for my weight group this month?”
- Ask at check-in which weight group you landed in that day. Your weight on donation day is what counts.
- Check new donor offers separately. First-month bonuses usually follow their own schedule.
Tips if you are close to a weight line
- You must weigh at least 110 lb on the scale that day. If you are right at the line, eat a normal meal and drink water before you go, but don’t try to game the scale.
- Wear normal clothes. Centers weigh you as part of the vitals check, and staff decide the group.
- If you are near a pay group line at CSL (139/140, 169/170, 199/200, 229/230 lb), small changes in weight can move you into a different group.
- Higher weight does not mean you can donate more often. FDA rules limit donations to once in a 2-day period and no more than twice in 7 days, as CSL’s FAQ explains.
- Keep your hematocrit healthy with iron-rich foods and fluids. Octapharma says hematocrit affects how much plasma you can give.
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Frequently asked questions
Do you get paid more for plasma if you weigh more?
At some centers, yes. CSL Plasma says payments are based on your weight on donation day, in 5 groups from 110 lb to 230+ lb. Octapharma says pay is based on weight, height and hematocrit. Other centers do not state this on their sites, so ask locally.
What is the minimum weight to donate plasma?
110 pounds (50 kg). CSL Plasma, BioLife, Grifols, Octapharma and KEDPLASMA all list this, and it matches the FDA donor weight rule.
Is there a maximum weight to donate plasma?
None of the five big centers we checked publishes a maximum weight on its official site. A center may still have its own limits, for example for chairs or equipment, so call ahead if you are concerned.
How much plasma is taken based on weight?
Under the FDA simplified nomogram, up to 690 mL for 110-149 lb, 825 mL for 150-174 lb and 880 mL for 175 lb and up. These totals include anticoagulant. Some centers, like CSL with iNomi, also use height and hematocrit.
Does weight affect how long plasma donation takes?
It can. Octapharma says donation time depends on your body weight and other factors. CSL says a donation usually takes about 90 minutes to two hours.
CouponVPS is not affiliated with CSL Plasma, Octapharma Plasma, BioLife, Grifols or KEDPLASMA. Eligibility rules and donor pay can change at any time and vary by center. This page is general information, not medical advice. Sources: official CSL Plasma FAQ, Octapharma Plasma FAQ, BioLife eligibility, Grifols eligibility, KEDPLASMA FAQ, FDA simplified volume nomogram memo, 21 CFR 630.10 (checked October 2026).
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