Donating blood doesn’t pay, but donating plasma—the part of blood used to treat hemophiliacs and burn victims—does. See if you qualify.

Step 1: Check qualification

Make sure you are qualified to donate. You must be at least 17 years old and weigh at least 110 pounds.

Step 2: Find plasma center

Do an Internet search to find a plasma-for-money center near you. Many centers listed in directories are located in large cities.

Step 3: Answer personal questions

On your first visit, you’ll need to complete a questionnaire concerning your medical history, sex habits, drug use, and so on. Some centers ask you to watch a video that explains the behaviors that could taint your blood.

Step 4: Get a physical

You will be given a nominal physical examination. Expect your finger to be pricked for a quick blood test, your pulse to be checked, and your temperature to be taken.

Step 5: Have blood drawn

Relax in an easy chair as blood is drawn from your arm, the plasma is extracted, and the blood is returned to your body through the same needle. This process, called plasmapheresis, takes about 45 minutes.

Step 6: Get paid

That’s it! Collect your fee ($20 to $30) and make an appointment to donate again. How often you may donate depends on the center. Some let you come in 48 hours later; others limit donations to once a month.