How Much Notice Should You Give When Calling in Sick?

Australian workplace law does not set one universal number of hours for calling in sick. An employee must notify their employer as soon as practicable that they are taking sick or carer's leave and tell the employer the period, or expected period, of the absence.

Where possible, this usually means contacting the employer before the shift starts and following the workplace's normal call-in process. If illness, injury or an emergency makes earlier notice impracticable, notice can be given after the leave begins, as soon as the employee is reasonably able.

A policy, award, enterprise agreement or contract may set a specific method or timing, such as calling the duty manager at least one hour before a shift. Employees should follow it when practicable, but the statutory “as soon as practicable” test still requires attention to the actual circumstances.

This page focuses on timing and communication. For the full evidence framework, read Medical Certificate Rules in Australia. For surgery-related notice, see Does Surgery Count as Sick Leave?.

This is general workplace information, not legal advice about a specific absence or disciplinary process. The applicable workplace instrument and facts matter. If a certificate is required, it remains subject to independent clinical assessment and is not guaranteed or backdated through Dociva.

Key Points

• There is no universal “two hours” or “four hours” notice rule for every Australian employee.
• Employees must give notice as soon as practicable.
• They should state the period or expected period away.
• Notice can be given after leave begins when earlier contact was not practicable.
• A workplace policy, award or agreement may set a call-in process or timing.
• Before-shift notice is usually best when the employee is able to provide it.
• Notice and evidence are separate obligations.
• An employer may request evidence for one day or less.
• Employees should keep a record of the call or message and any response.

Medical Certificates

The Fair Work Notice Rule

The Fair Work Ombudsman's notice and medical certificate guidance says an employee must let the employer know they are going to take sick or carer's leave as soon as possible, and this can be after the leave starts. The employee should also specify the expected length.

“As soon as practicable” depends on what was reasonably possible. A person who wakes with a migraine before a 9 am shift may be able to notify at 7 am. A person taken unconscious to hospital may be unable to contact anyone until later or may need a family member to assist.

The rule balances the employer's need to manage work with the reality that illness and emergencies are not always predictable.

Is Notice Required Before the Shift?

Before-shift notice is the safest approach whenever the employee knows they cannot attend and can contact the employer. It allows the employer to organise coverage and shows that the employee took the process seriously.

However, the National Employment Standards do not say that every employee who calls after the starting time automatically loses leave. The employee should explain why earlier notice was not practicable and provide evidence if requested.

A repeated pattern of avoidable late notice can create a separate attendance or policy issue even when individual absences are genuine. Employees should address communication problems early.

Workplace Policies and Specific Hours

A workplace may require employees to call a named manager, use a rostering system or provide a minimum period before the shift where possible. Awards and enterprise agreements can also contain notice terms.

Read the policy before illness occurs. Save the correct phone number and know whether a text, email or voicemail is accepted. Telling a co-worker may not count as notifying the employer.

If a rigid policy appears impossible in the circumstances, document what happened and seek advice. Neither side should assume the policy wording answers every unusual emergency without considering the legal standard.

Example Notice Timelines

Sudden morning illness: an employee wakes at 5:30 am with vomiting before an 8 am shift. If they can safely communicate, notifying the designated manager at 5:45 am is likely more practical than waiting for a clinic to open or for a certificate to be issued. Evidence can be arranged separately if the employer requests it.

Symptoms during an overnight shift: an employee becomes dizzy at 2 am and cannot safely continue. They should alert the supervisor immediately, obtain help with any safety-critical handover and seek appropriate care. The notice relates to the remaining hours; it does not need to be delayed until the day office opens.

Emergency hospital admission: an employee is taken to hospital unconscious before work and regains capacity later that day. Earlier personal notice was not possible. A family member may contact the workplace, or the employee can do so once able, explaining the expected absence without disclosing unnecessary clinical details.

Planned treatment: surgery is booked three weeks ahead, but the exact recovery time is uncertain. The employee can give the known treatment date and a reasonable initial estimate, then update the employer after receiving clinical advice. Waiting until the morning of surgery would usually make roster planning harder without protecting medical privacy.

These examples illustrate context rather than fixed legal deadlines. The practical question is what the employee knew, what communication was reasonably possible and whether they used the workplace channel promptly. Time-stamped messages, call logs and follow-up updates can help both sides reconstruct events accurately.

What Information Should You Give?

State that you are unfit for work or need carer's leave, identify the affected shift or hours and give the expected return date if known. Tell the employer if the timing is uncertain and agree on when you will update them.

You generally do not need to give a manager a detailed diagnosis simply to notify an ordinary sick absence. The employer may need functional, infection-control or safety information in particular circumstances, but requests should remain relevant.

Keep the communication concise and accurate. Do not promise to return on a date that the practitioner has not supported, and do not misdescribe carer's leave as the employee's illness.

Notice vs Medical Evidence

Calling in sick satisfies a communication step; it does not necessarily satisfy evidence requirements. An employer can separately ask for a medical certificate, statutory declaration or other reasonable evidence.

Fair Work says evidence may be requested for one day or less. An award or registered agreement can specify when and what type must be provided, and the evidence should satisfy a reasonable person.

The page medical certificates for every sick day explains policies requiring evidence for short absences.

Sudden Illness During a Shift

An employee who becomes unwell after work starts should notify the appropriate manager before leaving where possible. They should explain which remaining ordinary hours are affected and whether immediate medical attention is needed.

Leaving without telling anyone can create a safety and attendance problem, especially in roles requiring handover. In an emergency, treatment comes first and notification can follow when practicable.

A part-day absence can use personal leave for ordinary hours missed, subject to balance, notice and evidence. See personal leave in hours or part-days.

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Planned Surgery or Treatment

When treatment is scheduled, the employee can often provide notice well in advance, even if the exact recovery period is not yet known. Give the employer an estimate and update it when the treating practitioner provides clearer information.

Planned treatment is not automatically excluded from sick leave. The employee must be unable to work because of illness, injury, treatment or recovery. A routine appointment while otherwise fit may require another arrangement.

Do not wait until the morning of known surgery to give notice without a genuine reason. Early communication supports roster planning while keeping clinical details private.

Carer's Leave Notice

The same as-soon-as-practicable notice principle applies when an employee needs to care for or support an immediate family or household member because of illness, injury or an unexpected emergency.

Unexpected events may provide little warning. Tell the employer the expected period and update them if the caring need changes. Evidence should relate to the need for care or support rather than falsely state the employee was personally unfit.

For the document and privacy issues, read Carer's Leave Certificate in Australia.

If You Cannot Contact the Usual Manager

Use the next approved channel in the policy, such as the duty phone, HR system or another authorised supervisor. Leave a clear time-stamped message and try again if the role requires direct confirmation.

A family member may notify the employer when the employee is too unwell, but should share only necessary information. The employee can confirm details when able.

Keep screenshots, call logs or email copies. Records can resolve a later disagreement about whether and when notice was provided.

Common Notice Mistakes

• Waiting until after the shift despite knowing earlier that attendance was impossible.
• Telling only a colleague instead of the manager or system named in policy.
• Giving no expected duration or update plan.
• Assuming a certificate replaces the need to call in.
• Sharing excessive medical details in a group chat.
• Claiming a message was sent without keeping any record after a dispute arises.
• Using the wrong leave description for a caring absence.
• Ignoring follow-up requests about an extended absence.

The broader employee process is covered in when to give a certificate to your employer.

What Employers Should Do

Employers should publish clear contact methods, identify who receives sensitive evidence and train managers to respond consistently. A policy should work for ordinary absences and include a realistic escalation path for emergencies.

The Fair Work sick and carer's leave fact sheet summarises minimum notice, evidence and entitlement rules. Policies cannot remove National Employment Standards rights.

When notice is late, ask what prevented earlier contact and consider the evidence. A legal or disciplinary conclusion should be based on facts, not an automatic assumption that illness was false.

Seeking a Certificate Promptly

If evidence is likely to be required, arrange assessment as early as possible. Tell the practitioner the symptoms, onset, work duties and exact dates. A certificate should only cover what can be clinically supported.

The Medical Board of Australia's telehealth guidance requires proper assessment and escalation when remote care is unsuitable. An employer's deadline does not guarantee issue.

Dociva does not provide backdated certificates. Urgent symptoms require urgent or emergency care rather than waiting for paperwork.

More of Our Services

Using Dociva

Dociva currently accepts online medical certificate requests for sick leave, carer's leave, study and multi-day absences. An Australian registered medical practitioner independently considers the submitted symptoms, dates and functional impact.

Submitting a request does not guarantee a certificate. Dociva does not notify employers, decide whether notice was timely or backdate a certificate's issue date. Employees must follow the workplace call-in process separately.

For a suitable request, review the medical certificate application. Standard and extended online consultations are also available for broader assessment. Seek urgent or emergency care for severe symptoms.

Frequently Asked Questions (FAQs)