"How often should I get tested?" is one of those questions clinicians get asked sideways — usually after the actual visit, hand on the door handle. The honest answer is: it depends on what your sex life looks like, and most people are due for a test sooner than they think.
The South African Department of Health and most international guidelines converge on a few sensible defaults. None of them ask you to feel guilty. They just ask you to be honest about your last six months.
The baseline most adults need
If you're sexually active at all — partnered, casual, monogamous, or solo with the occasional encounter — the baseline recommendation is once a year. That covers HIV, syphilis, chlamydia, gonorrhoea, and hepatitis B if you haven't been vaccinated. A standard panel takes about ten minutes and costs nothing at most public clinics.
This baseline assumes one stable partner, low risk overall, and no symptoms. If any of that doesn't describe you, the interval shortens.
Every 3 months — when this applies
Three-month intervals are for people in higher-exposure situations. That's not a moral judgement; it's a maths problem. The more partners or the more risk-elevating practices, the more useful frequent screening becomes.
- Multiple new partners in the last three months
- Inconsistent or no condom use with new partners
- Men who have sex with men, regardless of partner count
- People on PrEP — quarterly testing is part of the protocol anyway
- Sex workers and clients of sex workers
- Anyone who shares injection equipment
Three months also happens to be the realistic window in which most STIs become detectable. Test sooner and you might miss something still incubating; test later and you might have passed it on.
Every 6 months — the middle ground
Halfway between the annual default and the quarterly cadence is the six-month interval. It fits people who are sexually active with a small number of new partners, generally use protection, and want a regular check-in without it feeling clinical.
If you've ended one relationship and started another in the last year, this is your interval. If you've had one new partner in the last six months, this is your interval. If you're not sure, this is also your interval.
Special situations that override the schedule
Some events trigger a test regardless of when you last had one:
- A new partner. Both of you should test before going condom-free. A "we're exclusive now" conversation is incomplete without paperwork. This isn't romantic but it is sexy in the long run.
- Symptoms. Unusual discharge, sores, burning, pelvic pain, or itching — none of these should wait until your next scheduled visit.
- A partner tells you they tested positive. Test immediately, then again at the appropriate window for whatever they had — different STIs have different incubation periods.
- Sexual assault. Most provinces in South Africa offer free post-exposure prophylaxis (PEP) plus testing through Thuthuzela Care Centres. The 72-hour window matters.
- Pregnancy or trying to conceive. A full panel is part of standard antenatal care — get the partner panel done at the same time.
What's actually in a "full panel"
This is the question that catches most people off-guard. A "standard" STI screen at a clinic typically covers:
- HIV — usually a rapid finger-prick, results in 20 minutes
- Syphilis — blood draw
- Chlamydia and gonorrhoea — urine sample (or self-collected swab)
- Hepatitis B — blood draw, often skipped if you're vaccinated
What's not usually included unless you ask: herpes (HSV-1 and HSV-2), HPV (no good blood test exists for general population), trichomoniasis, mycoplasma genitalium. Ask specifically if you've had specific exposure or want a more complete picture. Herpes blood testing in particular is worth a conversation — most experts don't recommend asymptomatic screening because the false-positive rate is high enough to cause more harm than good.
How to ask without making it weird
Asking a partner to get tested is a relationship skill that nobody teaches you. The framing that works: "I get tested every six months and I'd love for us to do it together before we stop using condoms." It positions testing as something you do for yourself, not an accusation.
If they push back hard, that's information about the relationship, not a verdict on testing. Most adults respond fine to a calm, prepared conversation.
South Africa-specific: where to test
Your options:
- Public clinic — free, comprehensive, sometimes long waits. Most stock PrEP, PEP, and full panels.
- Private GP — fast, costs around R600-R1500 for a full panel depending on the lab and city.
- Marie Stopes / Right to Care / NGO clinics — generally free or sliding-scale, sex-positive, friendly to LGBTQ+ patients.
- Postal/at-home test kits — increasingly available; some private pharmacies stock them. Convenient if a clinic visit feels like a barrier.
The bottom line
Annual is the floor. Quarterly is the ceiling for most lives. Six-monthly catches the broad middle. None of these intervals say anything about the moral worth of your sex life — they're just the cadence at which testing actually does its job.
If you can't remember the date of your last screen, that itself is the answer: book one this week.
If you're managing a specific health condition or have ongoing exposure concerns, a quick chat with a GP can fine-tune the schedule for your situation.
