About the Notice Period Calculator
The OnNetJobs Notice Period Calculator helps you estimate when your notice period ends and what your final scheduled working day could be.
You can calculate forward from a resignation date or work backwards from the date you would like to leave. The calculator also supports calendar days, working days, custom workweeks, excluded dates and notice-period adjustments.
The result is based entirely on the information you enter. Always check your employment contract, company policy and applicable employment rules before relying on a calculated date.
How to Calculate Your Notice Period
Start with the date you give notice and the length of notice required by your employment terms.
For example, suppose you:
- submit your resignation on September 1
- have a four-week notice period
- start counting from the following day
The calculator determines the notice start date and counts forward according to your selected method.
Notice-period rules are not universal. Contracts can specify both the required notice and when it begins. For example, UK employment guidance says the contract may specify when notice starts; where it does not, notice generally starts the day after resignation.
That is why this calculator lets you choose whether notice begins on the same day, next calendar day or next working day instead of automatically imposing one rule.
Calendar Days vs Working Days
A notice period expressed in calendar days includes weekends and other non-working days.
A notice period counted in working days only counts the days you have selected as working days.
For example, with Monday through Friday selected as your workweek:
10 calendar days and 10 working days can produce very different end dates.
You can also enter holidays or other excluded dates if they should not count toward your calculation.
If your employment agreement simply states something such as “four weeks’ notice,” check exactly how your employer interprets that wording before choosing a counting method.
Notice End Date vs Final Working Day
These two dates are not always the same.
Suppose your calculated notice period ends on a Sunday but you normally work Monday through Friday.
The calculator may show:
Notice period ends: Sunday, October 18
Last scheduled working day: Friday, October 16
This distinction matters because the contractual end of employment and the last day you are actually scheduled to work can differ.
The calculator shows both rather than silently moving the notice end date to a working day.
Calculating Backwards From Your Desired Exit Date
If you already know when you want to leave, switch to the mode that calculates the estimated resignation date.
For example, if you want your notice to end on November 30 and your contract requires one month of notice, the calculator can work backwards to estimate when notice should be submitted under the assumptions you select.
This can be useful when coordinating:
- a new job start date
- relocation
- travel
- an existing contract end date
- personal commitments
You should still leave enough time to confirm the date with your employer before making commitments based on the estimate.
Adjustments, Holidays and Non-Working Days
Employment arrangements are not always as simple as adding a fixed number of days.
The calculator therefore lets you:
- choose your normal working days
- exclude specific dates
- add or subtract an adjustment
- calculate using days, weeks or calendar months
Calendar months are treated as actual months rather than automatically converting one month into 30 days.
That matters because months vary between 28 and 31 days, and leap years can also affect date calculations.
Check Your Contract Before Resigning
Your employment contract or written employment terms are normally the first place to check for your required notice.
Rules can also vary significantly by country. For example, UK Acas guidance distinguishes between statutory notice and longer contractual notice, and advises employees to check their contract or written employment particulars.
Arrangements can also change by agreement. An employer and employee might agree to shorten a notice period, use garden leave or arrange payment in lieu of notice instead of requiring the employee to work the full period.
The OnNetJobs calculator therefore calculates dates, not your legal entitlement or obligation.
Frequently Asked Questions
When does a notice period start?
That depends on your contract and applicable employment rules. The calculator allows you to choose the same day, next calendar day or next working day. In the UK, for example, official guidance says notice will usually begin the day after resignation unless the employment contract specifies otherwise.
Is a one-month notice period always 30 days?
No. A calendar month is not necessarily 30 days. The calculator treats months as calendar months so different month lengths are handled correctly.
Do weekends count during a notice period?
They may, depending on how your notice period is defined. If it is counted in calendar days, weekends are included. If your agreement requires working-day counting, your selected non-working days are excluded.
What if my notice period ends on a weekend?
The calculator shows the contractual notice end date separately from the last scheduled working day. This helps avoid confusing the two dates.
Can I calculate when I should resign for a specific leaving date?
Yes. Select the reverse-calculation mode, enter the date you want the notice period to end, and provide your required notice length and counting assumptions.
Can I leave before my notice period ends?
That depends on your employment arrangements and applicable law. For example, UK Acas guidance says an employee can ask to leave earlier and recommends getting any agreement from the employer in writing.
Does this calculator provide legal advice?
No. It provides date estimates based on the assumptions you enter. Your employment contract, employer policies and local employment law determine the notice you are actually required to give.