Half-day leave is time off taken in units smaller than a full working day — most commonly a morning or an afternoon, deducted as 0.5 days or the equivalent hours from an employee’s balance.

It’s the most-requested flexibility in most leave policies and the most common source of balance disputes, for one reason.

“Half a day” is not a fixed quantity

A policy written in days quietly assumes that every employee’s day is the same length. The moment that stops being true, half-days produce inequity.

For someone working five eight-hour days, half a day is four hours. For a colleague on a compressed four-day week of ten-hour shifts, it’s five. For a part-timer working three six-hour days, it’s three. Deduct “0.5 days” from all three and you have taken a different amount of time from each — and given the compressed-week employee a 25% better deal than the full-timer sitting next to them.

Tracking in hours dissolves the problem. Tracking in days creates it. If your system stores entitlement as hours and displays it as days, half-days work correctly for everyone. If it stores days, you will be writing exception rules forever.

A second, quieter issue: a half-day isn’t always half a shift. Someone starting at 2 pm who takes “the morning off” has taken nothing. Part-day leave needs a start and end time, not just a fraction.

United States

Two rules matter, and they pull in different directions.

Exempt employees. You cannot reduce an exempt employee’s salary for a partial-day absence — doing so risks the exemption. What you can do is deduct the half-day from their PTO balance, which keeps salary whole and the exemption intact. The limit is familiar: once the balance is exhausted, you still cannot dock salary for a partial day. The one carve-out is intermittent FMLA leave, where partial-day deductions are expressly permitted.

Non-exempt employees are paid for hours worked, so part-days are straightforward — provided the hours are actually recorded.

Statutory sick leave has its own increment rules, and they bite. California permits an employer to set a reasonable minimum increment for using paid sick leave, but caps it at two hours. A policy requiring sick leave to be taken in half-day blocks is therefore unlawful there, because half a day exceeds two hours for almost everyone. Other jurisdictions set their own caps. If your system enforces a half-day minimum across all leave types, check it against every sick leave statute you’re subject to.

Canada

Federally regulated employers. Under section 206.6 of the Canada Labour Code, personal leave may be taken in one or more periods — but the employer may require that each period be not less than one day. Half-days are therefore permitted only if the employer allows them.

Ontario. The rule catches people out. Vacation must be scheduled in weekly blocks by default — a two-week block or two one-week blocks for employees with under five years’ service, three weeks’ worth for those with more. Shorter periods, including single days and part-days, are possible only where the employee requests it in writing or electronically and the employer agrees. So an Ontario employer cannot simply offer half-day vacation as a policy feature: the request has to come from the employee, in writing.

Quebec. Annual leave is likewise expected to be taken in a continuous period, with splitting available at the employee’s request.

Internationally

United Kingdom. Statutory leave may be taken in instalments, and half-days are a contractual matter rather than a statutory one. The practical catch is that the 5.6-week entitlement is expressed in weeks, so converting to days and then halving them is exactly where part-timers get shortchanged.

Australia. Annual leave can be taken in any period agreed between employer and employee, including part-days. Personal and carer’s leave is deducted in hours under the National Employment Standards, which handles part-days cleanly without any half-day concept at all.

Frequently asked questions

How much is a half-day of leave? Half of that employee’s own scheduled working day, which differs between full-timers, part-timers and compressed-week staff. It’s not a fixed number of hours across a workforce.

Can an employer refuse half-day leave? Generally yes — it’s a policy choice in most places. In Ontario, the opposite problem applies: part-day vacation requires the employee’s written request and the employer’s agreement.

Can you deduct a half-day from a salaried employee’s pay? No. Deduct it from their PTO balance instead. Reducing salary for a partial-day absence risks the exemption.

Can sick leave be taken in half-days? Often, but check the minimum-increment rules — California caps the increment an employer may require at two hours.

Read more about how Vacation Tracker handles half-days: 

How Do I Request a Half-Day Leave?

How Do I Set Half-Day Intervals?