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Probation End Date Calculator

Enter your start date and probation length to find your exact end date.

Probation ends on

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What this calculator does

Probation periods let employers evaluate new hires before confirming permanent employment. This online calculator adds your probation length in months to your start date to give you the exact end date, so you and your manager know when a formal review or confirmation decision is due.

Worked example

You start work on September 15, 2026 with a standard 3-month probation. Adding 3 calendar months to September 15 gives December 15, 2026 as the probation end date.

Common mistakes

  • Using 30-day months instead of calendar months. A 3-month probation is not always 90 days — February is shorter, so a start date late in the year can end up a day or two different from a flat day count.
  • Month-end edge cases. Starting on January 31 with a 1-month probation rolls to February 28 (or 29 in a leap year), since February 31 doesn't exist.
  • Forgetting notice requirements during probation. Many contracts have a shorternotice periodduring probation — check whether that changes once you're confirmed.

Frequently asked questions

How is the probation end date calculated?+

We add your probation length in months to your start date using calendar-month arithmetic — the same day-of-month, that many months later. If that exact day does not exist in the target month (for example, starting January 31 with a one-month probation), the date rolls to the last day of that month.

Does the probation period include my start date?+

Yes. Most contracts count the start date as day one of employment, so a 6-month probation starting July 1 ends on December 31 (the day before January 1) or January 1 depending on whether your contract treats the anniversary date as inclusive. This calculator uses the standard "same date, N months later" convention used by most HR systems.

What happens if my probation is extended?+

If your employer extends your probation, simply change the probation length (or start date, if it was reset) and recalculate. There is no automatic detection of extensions since these are decided case by case.

Is the probation end date the same as my confirmation date?+

Usually yes — many companies confirm permanent employment on or shortly after the probation end date, following a review. Some employers formally confirm a few days later, so treat this date as the earliest possible confirmation date.

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