Most adults should get tested for HIV at least once in their lifetime, and people with ongoing risk factors should test annually or more often. The right schedule depends on your sexual activity, whether you use injection drugs, and whether you’re on preventive medication like PrEP.
Baseline Testing for All Adults
The CDC recommends that everyone between the ages of 13 and 64 get tested for HIV at least once as part of routine health care. This applies regardless of your perceived risk. Many people living with HIV don’t know they have it, and a one-time screening catches infections that might otherwise go undetected for years.
If that one-time test comes back negative and your risk factors haven’t changed, you may not need regular retesting. But if your situation changes (a new partner, a partner whose status you don’t know, or any of the higher-risk factors below), your testing schedule should change too.
Annual Testing If You Have Risk Factors
You should test at least once a year if any of the following apply to you:
- You’ve had more than one sexual partner since your last test
- Your sexual partner has had other partners
- You inject drugs or have a sexual partner who does
- You’ve exchanged sex for money or drugs
- You’ve been diagnosed with another sexually transmitted infection
Annual testing is the minimum for these groups. Depending on how many of these factors overlap, more frequent testing may make sense.
Every 3 to 6 Months for Higher-Risk Groups
Men who have sex with men face a disproportionate share of new HIV infections, and the CDC suggests providers consider offering testing every 3 to 6 months for those with ongoing risk behaviors, such as multiple partners or a partner whose HIV status is unknown. This same 3-to-6-month interval applies to anyone whose risk behaviors persist between tests.
People who inject drugs and are taking PrEP should also test every 3 months, per CDC guidelines. The logic is straightforward: more frequent exposure means a shorter useful life for any single negative result.
Testing on PrEP
If you’re taking PrEP (pre-exposure prophylaxis), HIV testing is built into the process. You need a confirmed negative test immediately before starting the medication, then a repeat test roughly every three months for as long as you stay on it. These follow-up visits also check kidney function and screen for other STIs, so they serve multiple purposes at once.
This schedule isn’t optional. PrEP should not be taken by someone who already has HIV, because using it without knowing you’re positive can lead to drug resistance that limits future treatment options. Regular testing keeps that from happening.
After a Possible Exposure
If you think you were exposed to HIV through unprotected sex, a condom breaking, needle sharing, or sexual assault, testing follows a specific timeline. The key concept is the “window period,” which is the gap between when the virus enters your body and when a test can reliably detect it. Testing too early can produce a false negative.
Different tests have different window periods:
- Nucleic acid test (NAT): detects HIV 10 to 33 days after exposure
- Lab-based antigen/antibody test (blood drawn from a vein): 18 to 45 days
- Rapid antigen/antibody test (finger stick): 18 to 90 days
- Antibody-only tests (including most home tests): 23 to 90 days
If you started post-exposure prophylaxis (PEP) after a potential exposure, the recommended follow-up is an HIV test at 30 days and again at 90 days after the exposure. PEP can delay the timeline for the virus to show up on tests, which is why that second test at 90 days matters.
Home Tests vs. Lab Tests
The OraQuick home test is the only FDA-approved HIV self-test, and it uses a mouth swab to detect antibodies. It’s convenient and private, but it’s less sensitive than what you’d get at a clinic. Clinical studies show it catches about 92% of true positives, meaning roughly 1 in 12 people who actually have HIV will get a false negative result. On the flip side, its specificity is 99.98%, so a positive result is almost certainly real (only about 1 false positive per 5,000 tests).
Lab-based tests drawn from a vein are more accurate and have a shorter window period. If you’re testing after a known exposure or you want the most reliable result, a lab test is the better choice. A home test is a reasonable option for routine screening when your risk is low, but any positive result from a home test needs confirmation with a lab test, and a negative result after a recent exposure should be followed up with a more sensitive test.
Testing During Pregnancy
All pregnant people should be tested for HIV as early as possible in each pregnancy. This is standard and typically happens at the first prenatal visit. A repeat test in the third trimester is recommended if you live in a state or area with higher HIV rates among women of childbearing age, if you’ve been diagnosed with another STI during the pregnancy, or if there’s been any ongoing risk of exposure.
If HIV status is still unknown when labor begins, expedited testing should happen at the hospital. Early detection during pregnancy allows treatment that dramatically reduces the chance of passing HIV to the baby, which is why the testing schedule is more aggressive than for the general population.
Where to Get Tested
HIV testing is available at most primary care offices, urgent care clinics, community health centers, Planned Parenthood locations, and local health departments. Many of these offer free or low-cost testing. You can also order the OraQuick home test online or pick one up at a pharmacy without a prescription. Some public health programs mail free self-test kits.
Testing is quick. Rapid tests return results in about 20 minutes. Lab-based tests typically come back within a few days. If you’re unsure which type of test to ask for, a lab-based antigen/antibody test from a blood draw offers the best combination of accuracy and a short window period.