Last reviewed: 15 September 2026
An HIV self-test allows you to collect your own sample, perform the test and read the result in a private setting. Depending on the product, the sample may be oral fluid or a small finger-prick blood sample.
HIV self-tests are designed to be simple to use, but the exact procedure, reading time and result interpretation depend on the specific test. Always follow the Instructions for Use supplied with your test.
Testing is the only way to know your HIV status. HIV can be present without noticeable symptoms, so symptoms alone cannot confirm or rule out infection.
Knowing your status allows you to access treatment and care if HIV is confirmed, or to consider prevention options if your result is non-reactive and you remain at risk.
If a possible HIV exposure occurred within the last 72 hours, do not wait for a self-test result. Seek urgent medical advice about post-exposure prophylaxis (PEP), which must be started within 72 hours.
Most HIV self-tests are rapid tests that detect HIV antibodies. Some tests may use oral fluid, while others use finger-prick blood.
After collecting the sample, you apply it to the test according to the manufacturer's instructions and wait for the specified reading time. Many rapid self-tests provide a result within minutes, but the exact timing differs between products.
Do not interpret the result by using a general rule about the number of lines. Check the Instructions for Use supplied with your specific test to determine whether the result is non-reactive, reactive or invalid.
Every HIV test has a window period. This is the time between a possible exposure and the point at which the test can usually detect HIV.
According to the CDC, antibody tests can usually detect HIV 23 to 90 days after exposure. A rapid antigen/antibody test using finger-prick blood can usually detect HIV 18 to 90 days after exposure. Laboratory antigen/antibody tests and nucleic acid tests may detect infection earlier.
A non-reactive result obtained during the window period does not necessarily rule out HIV. If you test after a recent possible exposure, repeat testing may be necessary after the applicable window period for the test you used.
Always check the Instructions for Use for the specific test, as its stated window period and intended use take priority over general guidance.
HIV self-tests can be highly accurate when they are used correctly and at the appropriate time, but performance varies between products.
Two measures commonly used to describe test performance are sensitivity and specificity. Sensitivity describes how well a test identifies people who have HIV, while specificity describes how well it identifies people who do not have HIV.
The sensitivity and specificity of a particular HIV self-test should be taken from the manufacturer's Instructions for Use rather than applied as a general figure to all self-tests.
A non-reactive result means that the test did not detect the HIV markers it is designed to detect. If the test was taken during the window period, repeat testing may still be necessary.
A reactive HIV self-test does not by itself confirm an HIV diagnosis. Follow-up testing by a trained healthcare provider or testing service is required.
An invalid result means that the test did not work correctly. Repeat the test using a new device and follow the supplied instructions carefully.
At-home HIV testing can be a convenient option for people who prefer to test privately. Before ordering, check that the test is intended for self-testing and review the product information, sample type and Instructions for Use.
When your test arrives, check the expiry date and packaging before use and follow the manufacturer's instructions exactly.
If you are unsure which HIV test is appropriate for you, or if you are testing after a recent possible exposure, contact a healthcare professional or sexual health service for advice.
