The short answer: STI testing can cost anywhere from $0-250.
The longer answer: It all depends on the tests you need, whether you have symptoms, and if you need an exam. Many health insurance plans cover 100% of the costs of STI testing with no copay or out-of-pocket costs to you.
If you don't have insurance or your insurance doesn't cover the cost of your visit, you can ask if the health center uses a sliding scale, which means they'll lower the price depending on your income. You can also contact your
nearest Planned Parenthood health center for information and resources. They will help you get the care you need at a cost you can afford.