Use the How to Work Out A Notice Period End Date
A notice period end date is the date your notice is expected to finish. To estimate it, start with the date notice is given, add the notice length from your contract or written statement, then check whether the wording counts calendar days, working days, weeks or months.
Use your contract first, then count the period exactly as the wording says. If the wording is unclear, ask your employer or HR to confirm the final working day in writing.
A calculator can estimate the date, but it cannot decide employment rights. Notice periods can depend on whether someone resigns, is dismissed, is made redundant, is on probation, or has a contract that gives more notice than the legal minimum.
Need an estimated end date?
Use the notice period end date calculator for calendar days, working days, weeks, months and bank-holiday adjustments.
What you need before counting
Before you calculate a notice period end date, collect the exact details. Guessing from “one month” or “four weeks” can easily move the final date by a day or more.
Calendar days, working days, weeks and months
The biggest mistake is treating every notice period as if it is counted the same way.
| Wording | What usually happens | Watch out for |
|---|---|---|
| 7 calendar days | Every day counts, including weekends and bank holidays. | Whether the day notice is given counts. |
| 1 week | Often means the same weekday the following week. | Contract wording may still define how it is counted. |
| 20 working days | Usually weekdays are counted and weekends skipped. | Whether bank holidays are excluded and which UK region applies. |
| 1 calendar month | Often means the same date in the next month, where possible. | End-of-month dates such as 30, 31 or February can be awkward. |
For the difference between date-counting methods, see the calendar days vs working days guide.
Step-by-step method
- Read the wording: use the notice clause in the contract or written statement, not a rough memory of it.
- Pick the start date: decide whether the count starts on the date notice is given or the next day.
- Add the notice period: add the number of days, weeks, working days or months.
- Check non-working days: if the rule uses working days, exclude weekends and any bank holidays the rule tells you to exclude.
- Confirm the final day: ask for the final working day and final pay date in writing if the date matters.
Estimated end date = notice given date + notice period
Adjust only if the contract or policy says weekends, bank holidays or working days affect the date.Worked examples
Example 1: four weeks' notice
If notice is given on Wednesday 1 July 2026 and the contract says four weeks' notice, a simple calendar-week estimate lands on Wednesday 29 July 2026. But if the contract says counting starts the next day, the employer may treat the end date differently.
Example 2: 20 working days
If notice is given on Wednesday 1 July 2026 and the wording says 20 working days, weekends are usually skipped. If the period includes a bank holiday and the rule excludes bank holidays, the end date moves further out.
Example 3: one calendar month
If notice is given on 15 July 2026 and the contract says one calendar month, the simple estimate is 15 August 2026. If the end date falls on a weekend, the final working day could be the previous Friday or the next working day depending on the employer's approach and contract wording.
Do bank holidays affect a notice period?
Sometimes. If the notice period is counted in calendar days or calendar weeks, a bank holiday will often still sit inside the period. If the wording says working days and bank holidays are not working days for that purpose, the bank holiday may be excluded.
UK bank holidays also differ between England and Wales, Scotland and Northern Ireland. GOV.UK is the source of truth for the bank-holiday calendar, and it confirms that substitute weekdays normally apply when a bank holiday falls on a weekend.
Resignation, dismissal and redundancy are not identical
Notice-period calculations can differ depending on who is ending the employment. Acas says a notice period is the amount of time an employee has to work after they resign, are dismissed or are made redundant.
For resignation, Acas says the written statement or employment contract should state how much notice an employee must give. GOV.UK says employees usually must give at least one week's notice if they have been in the job for more than a month, while the contract may require more.
For dismissal or redundancy, Acas and GOV.UK set out statutory minimum notice periods based on length of service. Contracts can give more than the legal minimum, but employers cannot give less than the statutory minimum.
Common mistakes to avoid
- Assuming “one month” means exactly 28 days.
- Forgetting whether counting starts on the same day or the next day.
- Using working days when the wording says calendar days.
- Ignoring bank holidays when the policy excludes them.
- Assuming a calculator can override the contract, written statement or HR confirmation.
For employment dates, the best habit is to write the proposed end date clearly in the notice letter or email and ask the employer to confirm it.
FAQs
Does a notice period include weekends?
It depends on the wording. A notice period counted in calendar days or weeks usually includes weekends. A notice period counted in working days usually skips weekends, unless the worker's normal working pattern is different.
Does a notice period include bank holidays?
Sometimes. Calendar-day notice often includes bank holidays. Working-day notice may exclude bank holidays if the rule or contract treats them as non-working days.
Can my contract give a longer notice period than the legal minimum?
Yes. Acas and GOV.UK both point out that contracts can set notice periods. For employer notice, the contract can give more than the statutory minimum, but not less.
Is a notice period end date calculator legally binding?
No. It is an estimate. Your contract, written statement, employer confirmation and employment law position matter more than any generic calculator result.
Should I put my final working day in my resignation letter?
It is usually sensible to state the date you believe will be your final working day and ask your employer to confirm it, especially if the wording could be interpreted in more than one way.
Sources and checks
- Acas notice-period guidance for resignation, dismissal and redundancy.
- GOV.UK guidance on handing in notice and redundancy notice periods.
- GOV.UK UK bank-holiday calendars for England and Wales, Scotland and Northern Ireland.