An employer can ask why you are taking annual leave. In almost every developed employment system, you are not obliged to tell them, and the request cannot be refused solely because you declined to say.
The reason is structural. Annual leave — paid holiday you have earned — is granted on the basis of operational capacity, not on the merit of your plans. The moment an employer starts weighing reasons, they are rationing an earned entitlement by judgement, which is where discrimination claims and morale problems begin.
Sick leave, carer’s leave, and family leave are a different matter entirely. Those are conditional entitlements, and employers can lawfully require evidence.
Key Takeaways
- Annual leave is unconditional. You earned it; no jurisdiction requires you to justify how you spend it.
- Conditional leave is different. Sick, carer’s and family leave can require evidence in the UK, Australia and New Zealand.
- Employers may ask about dates, duration and cover — that is operational, not personal.
- Asking for reasons and then approving selectively is how employers create discrimination exposure.
The Common Principle Across Every Market
Wherever paid annual leave is a statutory entitlement, the same logic applies: the employee accrues it, the employer manages when it is taken, and the purpose of the absence is not a lawful criterion for the decision.
Every system gives employers a legitimate say over timing. None gives them a say over purpose.
Where employers can properly probe is the operational envelope:
- Which dates, and how many days
- Who covers your work
- Whether the request clashes with a known peak, a deadline, or another approved absence
- Whether you will be contactable (only where the contract genuinely requires it)
None of those questions requires you to say where you are going or what you are doing.
How It Differs by Country
| Reason required for annual leave? | Employer’s power over timing | Evidence for sick/personal leave | |
|---|---|---|---|
| UK | No | Can refuse with notice equal to the leave requested; must give notice of twice the length to impose leave | Self-certification for the first 7 days; fit note after that |
| Australia | No | Must not unreasonably refuse a request | Evidence that “would satisfy a reasonable person” |
| New Zealand | No | Must agree, or have a good reason to decline; at least 2 of the 4 weeks must be available continuously | Proof of sickness may be required |
| US (federal) | No statutory framework at all | Entirely employer policy | Entirely employer policy; FMLA certification for FMLA leave |
United Kingdom
Workers get 5.6 weeks of paid annual leave. Acas sets out the notice mechanism — a worker gives notice of twice the length of the leave requested; an employer refusing or cancelling must give notice equal to it — and nowhere in that mechanism is a reason required.
An employer should have a good business reason to refuse. “I don’t think that’s a good enough reason to be off” is not a business reason.
Where UK employers should be most careful is with health information. Any detail an employee volunteers about a medical reason becomes special category data under UK GDPR, with a higher bar for lawful processing. Our guide to GDPR and employee leave data covers what you may record and for how long.
Australia
Under the National Employment Standards, annual leave is taken by agreement between the employer and employee, and the Fair Work Ombudsman is explicit that an employer must not unreasonably refuse a request. There is no reason requirement.
Personal/carer’s leave is where evidence enters. Fair Work’s standard is that the evidence must “convince a reasonable person that the employee was genuinely entitled” to the leave — typically a medical certificate or statutory declaration. Fair Work also states what is not reasonable: an employer contacting the employee’s doctor for further information, or attending a medical appointment with the employee unless the employee asked them to.
New Zealand
Under the Holidays Act 2003, employees get four weeks of annual holidays after 12 months’ continuous employment. Employment New Zealand says the employer must agree to a request or have a good reason for declining it, such as other staff already having booked the same period — and must allow at least two of the four weeks to be taken continuously.
For sick leave, an employer can ask for proof of sickness or injury. If the employer requests that proof within the first three consecutive calendar days of the absence, it must meet the employee’s reasonable costs of obtaining it.
United States
There is no federal right to paid vacation at all. The Department of Labor states that the Fair Labor Standards Act does not require payment for time not worked, such as vacations, sick leave or holidays — these are matters of agreement between employer and employee.
That means the reason question is governed entirely by employer PTO policy and, in most states, at-will employment. Many US employers do ask. Some approve or deny on the basis of what they are told. That is largely lawful, with two important exceptions: FMLA-qualifying leave and disability-related requests under the ADA have their own certification and interactive-process rules, and state or city paid sick leave ordinances often restrict what an employer may demand. Our overview of paid leave laws by state covers the patchwork.
Why Asking Is a Bad Idea Even Where It Is Legal
Set aside legality for a moment. Asking for reasons creates three concrete management problems.
It generates inconsistency you cannot defend. Once reasons are collected, they get weighed. A wedding beats a long weekend. A funeral beats a wedding. Within six months you have an unwritten hierarchy that nobody agreed to and no manager applies the same way.
It imports protected characteristics into the decision. Religious observance, fertility treatment, gender-affirming care, caring responsibilities, a disability-related appointment. An employee who names one of these and is then refused has the outline of a discrimination claim, whatever the actual reason for the refusal.
It teaches people to lie. Staff quickly learn which reasons get approved and supply those. You end up with less accurate information than if you had never asked.
The Rule That Actually Works
The cleanest policy any organisation can adopt is one sentence:
Annual leave requests are assessed on dates and cover only. Reasons are neither required nor recorded.
Then handle exceptions explicitly rather than by discretion:
- A genuine clash — say what the clash is and offer alternative dates. That is an operational answer, not a judgement.
- Competing requests for the same period — publish a tie-break rule in advance. First come first served, rotation, or seniority. Any published rule beats unpublished discretion.
- Conditional leave types — sick, carer’s, bereavement, parental — get their own request routes with their own evidence rules, so they are never processed through the annual leave queue.
- Voluntary disclosure — if an employee chooses to explain, do not record it in the leave system. Note it only where it is genuinely needed, and treat health details as the sensitive data they are.
What This Means for You
If you are an employee: “I’m taking annual leave from the 12th to the 19th and Sam is covering my accounts” is a complete request. You can decline to elaborate without being obstructive. If you are asked for a reason and refused after declining to give one, ask for the business reason for the refusal in writing.
If you are an employer: stop collecting reasons for annual leave. Route conditional leave types separately, publish your tie-break rule for contested dates, and give operational reasons for every refusal.
Leave Balance is built around that separation. Annual leave requests carry dates and cover only, while sick, carer’s and family leave types can be configured with their own fields, approvers and evidence requirements — so sensitive information never lands in the general leave queue in the first place. Our guide to handling time off requests covers the approval workflow in detail. Flat $10/month, unlimited employees, 14-day free trial.
This article is general information about leave entitlements across several jurisdictions, not legal advice. Rules vary by country, state and contract — take advice on your own situation.
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