About this tool
Notice periods are written in different units, and the last day is easy to get wrong. Month-based notice must handle months of different lengths: this calculator follows the common convention of clamping to the end of a shorter month, so 31 January plus one month is 28 February (29 in a leap year). You can choose whether the resignation date counts as day 1, and switch to working days to skip weekends and a list of holidays you paste in. If you want to leave earlier, the buyout section estimates the shortfall in days and its cost using the daily-rate formula your employer uses: monthly salary ÷ 30, ÷ the days in the month, × 12 ÷ 365, or ÷ 22 working days. All date arithmetic is done on calendar dates in UTC, so daylight-saving changes cannot shift the result by a day.
How to use it
- Pick your resignation date and enter the notice length and unit from your contract.
- Choose calendar or working days, and whether the resignation date counts as day 1.
- For working days, paste your company holiday list, one YYYY-MM-DD date per line.
- Optionally enter your intended last day and monthly salary to estimate a buyout.
Notice Period Calculator FAQ
Does my resignation date count as the first day of notice?
It depends on your contract and HR policy. Some count the day you resign as day 1, others start the next day. Use the checkbox to see both answers, and confirm with HR in writing.
How is a month of notice calculated from 31 January?
One calendar month from 31 January lands on 28 February, or 29 February in a leap year, because February has no 31st. The same clamping applies to any month-end date.
Which salary is used for a notice buyout?
Contracts differ: some use basic salary, others gross monthly salary. Check your appointment letter, and remember that some employers let you offset unused leave against the shortfall.