References UK clinical guidance from the NHS, the British HIV Association (BHIVA), and the British Association for Sexual Health and HIV (BASHH). Last updated: April 2026.
Chlamydia test results typically take between 1 and 5 working days, depending on the type of test and where you take it. Rapid tests at some clinics can give results within hours, while postal home test kits usually take 2-5 days from when the lab receives your sample.
If you’re waiting for results and feeling anxious, here’s exactly what to expect for each testing route in the UK.
Order a home chlamydia test — results in 2-3 days
How Long Results Take by Test Type
| Test Type | Where | Typical Wait Time | How Results Are Delivered |
|---|---|---|---|
| Sexual health clinic (NAAT) | GUM clinic / walk-in | 1-7 days | Text, phone, or online portal |
| GP-ordered test | GP surgery → lab | 3-7 days | Phone call or follow-up appointment |
| Home test kit (postal) | Self-collected → lab | 2-5 days from lab receipt | Text, email, or online account |
| Rapid point-of-care test | Some clinics | 30-90 minutes | In person, same visit |
| National Chlamydia Screening | Postal (under 25s) | 3-7 days | Text or post |
Sexual Health Clinic Testing
Most sexual health clinics use NAAT (nucleic acid amplification test) technology, which is the gold standard for chlamydia detection. The sample (usually urine or a swab) is sent to a laboratory for analysis.
Turnaround times vary by clinic. Some busy urban clinics have in-house labs and can process results within 1-2 days. Others send samples to external labs, which can take up to 7 days.
Most clinics now deliver results by text message. You’ll typically only receive a phone call if the result is positive and follow-up is needed. No news after the expected timeframe usually means negative, but always confirm by calling the clinic if you haven’t heard.
Home Test Kit Results
Home STI test kits involve collecting your own sample (urine and/or swab) and posting it to a laboratory in a prepaid envelope. The timeline breaks down as follows:
- Day 1: You collect and post your sample
- Day 2-3: Sample arrives at the laboratory (Royal Mail first class)
- Day 3-5: Lab processes your sample and reports results
- Day 3-5: Results sent to you by text, email, or online dashboard
Total time from collection to results: typically 2-5 working days. Some providers offer faster turnaround.
How Long Before You Can Test?
This is a separate question from how long results take. Chlamydia has a testing window period:
- Minimum wait: 2 weeks after potential exposure for a reliable result
- Testing too early (within the first 14 days) may give a false negative because the bacteria haven’t reached detectable levels yet
- If you have symptoms: You can test as soon as symptoms appear, regardless of timing
If you test negative within the first 2 weeks and are still concerned, retest after the window has passed.
What Happens If the Result Is Positive?
A positive chlamydia result means you have an active infection that needs antibiotic treatment. Here’s what happens next:
- Treatment: Usually doxycycline (7 days) or azithromycin (single dose). Available from your clinic, GP, or online prescriber.
- Partner notification: Your recent sexual partners need to be informed so they can get tested and treated. Your clinic can help with this, including anonymous notification.
- Avoid sex: Don’t have sex for 7 days after starting treatment, and until your partner has also been treated.
- Test of cure: Not routinely needed, but a follow-up test at 3-6 months is recommended to check for reinfection (which is common).
Read more: What is chlamydia? | How to tell your partner
What If Results Are Delayed?
If you haven’t received results within the expected timeframe:
- Check your spam/junk folder if expecting results by email
- Log into the online portal if your testing provider has one
- Call the clinic or test provider directly
- A delayed result doesn’t mean it’s positive. Labs can have backlogs, especially after weekends and bank holidays
Frequently Asked Questions
Do positive results take longer than negative ones?
Not necessarily. Both positive and negative results go through the same laboratory process. However, you may hear about a positive result sooner because clinics actively reach out to arrange treatment, whereas negative results are often sent passively by text.
Can I get same-day chlamydia results?
Some sexual health clinics offer rapid point-of-care NAAT testing with results in 30-90 minutes. This is not available everywhere. Call your local clinic to check whether they offer same-day results.
Will my GP call me if the result is negative?
Usually no. Most GP practices only contact you if action is needed (i.e., the result is positive). If you haven’t heard within 7-10 days, call the surgery to confirm your results.
How accurate are home chlamydia test kits?
Home kits that use NAAT laboratory testing are as accurate as clinic-based tests (97-99% sensitivity). The key is collecting the sample correctly and posting it promptly. Follow the instructions carefully for the most reliable result.
Related reading
- Can You Have Chlamydia and Test Negative?
- Comprehensive Test: Chlamydia, Gonorrhoea and Herpes
- Chlamydia and Gonorrhoea Lab Test
- Chlamydia Rapid Test Kits: What to Know
- Home Chlamydia and Gonorrhoea Tests: How They Work
Sources
- NHS — Sexual health conditions
- BASHH — UK clinical guidelines for STI management
- British HIV Association (BHIVA) — HIV treatment guidelines
- Terrence Higgins Trust — sexual health information
- UK Health Security Agency — STI surveillance data
Steve Page is a recognised expert on Sexually Transmitted Diseases (STDs) and STD treatments, having published numerous articles in peer-reviewed journals and presented his research at conferences around the world. He has an in-depth understanding of the latest medical research on STDs, and is an advocate for the development of new treatments and protocols to improve the health of those affected. In addition to his research, he has dedicated his career to understanding the causes and symptoms of STDs, as well as how to best treat those impacted.
