How cortisol testing works, and what your levels can't tell you.
Cortisol moves on a daily rhythm: highest shortly after waking, lowest around bedtime. So a single reading and a rhythm map are not two versions of the same test. Here is how each option works in Australia, what it costs, and where Medicare fits.
Australia-wide, with at-home sample collection and online consultations.
Start with your GP if there is a medical question. If your GP has recommended cortisol testing to investigate a suspected medical condition, do that first. Functional testing sits alongside medical care, never in place of it, and everything on this page is general educational information rather than medical advice.
The short answer
Cortisol is your body's main stress hormone, and it moves on a daily rhythm: highest shortly after waking, lowest around bedtime. A cortisol test measures how much of it you are producing, and in Australia there are three common ways to do it. A blood test through your GP takes a single reading, usually in the morning, and can be bulk-billed with a referral. A saliva test collects several samples across one day to map your cortisol rhythm from morning to night. A dried-urine test, such as the DUTCH test, maps the rhythm and adds hormone metabolites. Functional cortisol testing costs from $355, is not covered by Medicare, and results are most useful when interpreted with a qualified practitioner alongside your symptoms, sleep and history.
Why the type of sample matters. Blood, saliva and dried urine are not competing versions of one measurement. Blood gives a snapshot at the moment the needle goes in. Saliva and dried urine are collected several times across a single day at home, which is what makes a curve rather than a point.
Looking specifically at the dried-urine option? The panel, the collection and the ordering process are covered in more depth in our guide to the DUTCH Complete hormone test in Australia.
What cortisol actually does.
Cortisol gets called the stress hormone, but on a normal day it is better described as your body's timing and energy hormone.
Two people can have the same 9am reading with completely different days behind it: one with a healthy morning peak that settles by evening, another running flat in the morning and elevated at midnight. This is why the conversation about cortisol is increasingly about rhythm rather than level alone.
The three ways to test cortisol in Australia.
All three are legitimate tools. They answer different questions, and an honest page should say so.
| Compared on | Blood test, via your GP | Saliva test | Dried urine, DUTCH |
|---|---|---|---|
| What it samples | One reading, usually morning | Several samples across one day | Four to five samples across one day |
| What it can show | Total cortisol at that moment. Used medically to investigate conditions such as Cushing's or Addison's | The shape of your daily rhythm, from the morning peak to the evening low | The rhythm plus cortisol metabolites, sex hormones and melatonin markers |
| Where it is collected | A pathology centre | At home, at set times | At home, at set times |
| Cost | Often bulk-billed with a GP referral | From $355, not covered by Medicare | From $520, not covered by Medicare |
| Where it fits | The right first step when a medical condition is the question. Start with your GP | When the question is your day-to-day pattern: energy, stress load, sleep timing | When you want the fuller hormone picture in one collection |
One gives a snapshot, the others give a curve. Neither is a better test in the abstract, and the useful question is which one answers what you actually want to know.
Not sure which test fits you? Take the one-minute quiz.
When a cortisol rhythm test may be worth considering.
Many of the women we work with have already been to their GP, had standard blood tests, and been told everything is within range, yet they still don't feel at their best.
Tasha was extremely thorough with her expert assessment and advice. I’d highly recommend Tasha and the team at Wellbeingeorge if you want to optimise your health in a proactive way, especially if you’re looking for deeper insights beyond what standard testing can provide.
Being told you are within range is not the same as being told why you feel flat.
A rhythm test adds one more layer of information to review, not a verdict to act on alone.
The two cortisol rhythm tests we offer.
Both use at-home sample collection and both are reviewed with a practitioner. The difference is how much of the wider hormone picture comes with the rhythm.
Well Woman Test
A female hormone and adrenal profile, for insight into cycle patterns, mood, energy and stress load. At-home saliva sample collection, reviewed with a practitioner.
$355 From, test only. Not covered by Medicare. View the Well Woman TestDUTCH Complete Hormone Test
A dried urine hormone test reviewing sex hormones, adrenal hormones and their metabolites, cortisol rhythm, melatonin and selected organic acid markers. At-home collection.
$520 From, test only. Not covered by Medicare. View the DUTCH CompleteNot sure which fits your situation, or whether either does? That is what the free call is for. Fifteen minutes with Georgie, no strings, and if a test isn't the right next step for you, she'll say so.
An honest word about what testing can and can't tell you.
A cortisol test gives you information, not a verdict. It does not diagnose a condition and it does not treat anything.
Its job is to show a pattern
Not to settle a question on its own. A pattern that lines up with how you have been feeling gives the conversation somewhere concrete to start, which is different from an answer.
A normal result is useful too
It lets you and your practitioner rule the pattern out and look elsewhere. That is not a wasted test, it is exactly how this is supposed to work.
"Adrenal fatigue" is not a diagnosis
You may come across the term. It is not a recognised medical diagnosis. What the research supports is that cortisol rhythms vary between people and can shift with sustained stress.
Cortisol testing FAQs.
The questions people ask most often about cost, Medicare, at-home collection and what a normal level actually means.
How much does a cortisol test cost in Australia?
A cortisol blood test ordered by your GP is often bulk-billed with a referral. Functional cortisol rhythm testing is privately billed: our saliva-based Well Woman Test starts from $355 and the DUTCH Complete dried-urine test from $520. Neither functional test is covered by Medicare.
Is cortisol testing covered by Medicare?
A GP-ordered cortisol blood test can be, when there's a medical reason for it. Functional saliva and urine rhythm tests are not covered by Medicare and are paid for privately.
Can I test my cortisol at home?
Yes. Saliva and dried-urine cortisol tests use at-home collection: samples are taken at set times across one day and posted to the laboratory. Blood tests are collected at a pathology centre.
What's the difference between a blood cortisol test and a saliva test?
A blood test measures total cortisol at a single moment, usually in the morning, and is the standard medical tool for investigating suspected cortisol disorders. A saliva test takes several samples across a day to show the shape of your cortisol rhythm. One gives a snapshot, the other a curve, and they answer different questions.
What is a normal cortisol level?
Reference ranges depend on the time of day, the sample type and the laboratory, which is why a number on its own means little. Cortisol is normally highest shortly after waking and lowest at night. Results are best interpreted with a qualified practitioner or your GP, alongside your symptoms and history.
How do I lower high cortisol?
That's a conversation to have with your GP or practitioner, because it depends on what's driving it. The areas commonly reviewed are sleep regularity, morning light, movement, caffeine timing, meal rhythm and stress load. This is general information only, not personal advice, and sustained or severe symptoms deserve proper medical review.
How long do results take?
Most functional hormone panels are reported within a few weeks of the lab receiving your samples, and we book your results consultation when you order so the review is already in the diary.
Wondering what your rhythm looks like?
Start with a free 15-minute call with Georgie. Bring your questions, and your GP results if you have them, and leave knowing whether cortisol testing makes sense for you, or whether something else is the better next step.
Georgina and the team at Wellbeing George are amazing to deal with and very professional. I was unsure as to what to expect as the testing protocol seems quite new, but after the 15min free consult I was totally convinced that it was exactly what I needed to try.
Reviewed by Georgina Waugh
Clinical Nutritionist, BHSc Nutritional Medicine
Last reviewed: August 2026
Sources reviewed: Healthdirect and MedlinePlus
This page is general educational information only. It is not medical advice, and functional testing does not diagnose, treat or replace care from your GP or specialist. Cortisol results are best interpreted with a qualified practitioner alongside your symptoms, health history, medications and lifestyle. If your symptoms are new, severe or getting worse, please see your GP. More detail is on our disclaimer page.