Medical certificate for work and sick leave

If you’re too unwell to work, your employer can ask for evidence, even for a single day. Click Clinic practitioners can assess a request for a sick leave certificate online for $35, typically within 48 hours, without you leaving home. A certificate is issued only when it’s clinically appropriate.

If a nurse practitioner issues your certificate, it’s titled an absence certificate rather than a medical certificate. Last reviewed 3 October 2026.

A man resting on a garden bench at home, messaging work on his phone

When do you need a medical certificate for work?

Full-time and part-time employees can take paid sick leave when they can’t work because of a personal illness or injury, including stress and pregnancy-related illness. Your employer can ask for evidence that you were unfit for work, and there’s no minimum: they can ask even if you’re off for one day or less.

Some workplaces set a rule, for example requiring a certificate for a Monday absence. An award or registered agreement can say when evidence is needed and what type, but the type requested must be reasonable in the circumstances.

Telling your employer

Let your employer know as soon as you can, which can be after your leave has started, and tell them how long you expect to be away.

What your employer can and can’t ask

  • They can ask for evidence that would convince a reasonable person you were genuinely unwell, such as a medical certificate or statutory declaration.
  • They can’t reasonably attend your medical appointment unless you ask them to.
  • They can’t reasonably contact your doctor or practitioner for more information.

Getting a sick leave certificate with Click Clinic

Fill in the request form with your symptoms and the dates you need. A registered practitioner assesses your request and, if a certificate is appropriate, emails it to you. If you need a physical examination, tests or ongoing treatment, see a GP in person instead.

Is it right for me?

A good fit if

  • You’re unwell now with a short-term illness or injury, or you’re caring for someone who is
  • You need a certificate for work, study or carer’s leave
  • You’re in Australia and can answer questions about your symptoms honestly

See a GP or call 000 instead if

  • It’s an emergency or your symptoms are severe or getting worse (call 000)
  • You need a physical examination, tests or ongoing treatment
  • You need a certificate for dates that have already passed

Frequently asked questions

Can my employer ask for a medical certificate for one sick day?

Yes. The Fair Work Ombudsman says employers can ask for evidence for as little as one day, or less, off work. If you don’t provide evidence when asked, you may not be paid for that leave.

Is an online medical certificate valid for work?

The Fair Work Act requires evidence that would satisfy a reasonable person, and the Fair Work Ombudsman lists medical certificates and statutory declarations as examples. Click Clinic certificates are issued by registered practitioners after an assessment, but acceptance is up to your employer, and your award or agreement can set specific evidence rules.

Does my employer get to know what my illness is?

The certificate gives a general reason for your absence rather than private medical details. The Fair Work Ombudsman also says it doesn’t consider it reasonable for an employer to contact your doctor for more information.

Can I get a certificate for a day I already missed?

No. Certificates are dated from the day you apply and aren’t backdated. If you need evidence for an earlier day, a statutory declaration may be accepted; check with your employer.

How many days' sick leave do I get?

Full-time employees accrue 10 days of paid sick and carer’s leave a year, and part-time employees accrue a pro-rata amount. Casual employees aren’t entitled to paid sick leave.

How much does it cost and how long does it take?

$35 flat, whether the certificate covers one day or several, assessed typically within 48 hours. A certificate is issued only when the practitioner considers it clinically appropriate.

Sources

  1. Notice and medical certificates (opens in a new tab), Fair Work Ombudsman. Accessed 3 October 2026.
  2. Paid sick and carer’s leave (opens in a new tab), Fair Work Ombudsman. Accessed 3 October 2026.