Work hours & pay
Tenure calculator
Enter your start date and, if you have left, an end date to see your exact length of service and when your next anniversary falls.
Leave the end date on today to measure service so far, or set a leaving date to measure a finished job.
How length of service is measured
Tenure is the gap between a start date and an end date, broken into whole years, months and days. The calculator counts calendar years first, then the leftover whole months, then the remaining days, borrowing from the month before when the end day is earlier than the start day. Someone who started on 28 January 2024 and is still employed on 24 October 2026 has served 2 years, 8 months and 26 days. The same span is 32 whole months, or 1,000 calendar days, which is why payroll and pension systems usually store tenure in total months rather than a year-month-day label.
The next work anniversary is the start month and day in the first year that still lies ahead, so it updates the moment this year's anniversary passes. That date is what most service-award and vesting schemes key off.
| Length of service | Whole months | Approx. days |
|---|---|---|
| 6 months | 6 | 183 |
| 1 year | 12 | 365 |
| 2 years | 24 | 730 |
| 5 years | 60 | 1,826 |
| 10 years | 120 | 3,653 |
Why the exact figure matters
Length of service decides more than a round-number celebration. Holiday entitlement, notice periods, redundancy pay and pension vesting are often tied to completed years, and a few days either side of an anniversary can move someone into a higher band. Because of that, count completed years carefully: finishing on the day before an anniversary usually counts as the lower number of full years, not the higher one.
Watch two common traps. Months are not all the same length, so converting days to months by dividing by 30 drifts over long spans; the year-month-day breakdown here avoids that by using real calendar months. And decide up front whether the end date is inclusive. For continuous employment, the convention is to count from the first day worked up to, but not including, the leaving date, which is what this tool does. If a scheme counts the leaving date itself, add one day to the total.
Frequently asked questions
How do I calculate years of service?
Count full calendar years from the start date to today, then the leftover months and days. Finishing just before an anniversary counts as the lower whole year, which matters for service-based benefits.
What counts as my start date for tenure?
Usually your first contracted day of work, not the offer or interview date. For continuous-service rules, use the date your current unbroken employment began.
Does tenure include unpaid leave or breaks?
This tool measures calendar time between two dates. If a period of unpaid leave or a break in service does not count under your scheme, measure each continuous stretch separately and add them.