The statutory rule
Under OR Art. 335b:- The first month of an open-ended employment relationship is a probation period unless the parties agree otherwise.
- The parties may agree a different probation period, extend it, or waive it — but it may never exceed three months.
- During probation, either side may terminate with seven days’ notice, unless the contract agrees otherwise.
- Where probation is effectively shortened by illness, accident or the performance of a statutory obligation, it is extended by the corresponding period — still within the three-month cap.
How the platform enforces it
The probation end date is derived, not typed. Once a contract is signed the start date and the configured probation duration are known, so the end date is computed:- Probation runs whole months from the start date. Its last day is the day before the same day-of-month that many months later — start 01.01 with three months means probation ends 31.03 and employment is confirmed from 01.04.
- Day-of-month overflow clamps to the end of the target month: 31.01 plus one month is 28 or 29.02, never 02 or 03.03.
- The configured duration is capped at three months regardless of what a position or template asks for. A template requesting six months yields three.
- No probation configured means no end date at all.
Because the date is derived, correcting a start date corrects the probation end date too. A
hand-typed date is the classic source of a missed probation deadline.