UK · 2026
UK Final Working Day Calculator
Pick the date you’re handing in your notice and the length of your notice period. The calculator gives you the exact final working day, with weekend rollback and bank holiday awareness.
Calculator
Pick a valid resignation date.
This calculator is for general guidance only. Always check your employment contract.
Need a handover plan? Get a personalised week-by-week plan based on your notice period.
How to work out your final working day
Your final working day is the last day of your contractual notice period, measured from the date you formally resign. The resignation date itself is day zero; the notice period is counted from the next calendar day.
Notice in weeks
Notice expressed in weeks adds calendar days. One week is seven days. So one week’s notice given on Monday means the following Monday is your final working day. Two weeks’ notice given on Friday means the Friday two weeks later.
Notice in months
Notice expressed in months follows calendar months, not fixed-length 30-day periods. One month’s notice given on 15 March means 15 April. If the target month is shorter, the date clamps to the last day: one month from 31 January is 28 February (or 29 in a leap year). Three months from 31 May is 31 August.
Worked example
Olivia hands in her notice on Tuesday 3 March 2026. She has a 3-month contractual notice. The final working day is Wednesday 3 June 2026. If she resigned on the 31st of a longer month and her three months would land on a shorter month, the date clamps to the last day of that shorter month.
Weekends and bank holidays
If your calculated final working day falls on a weekend, most employers treat the previous Friday as your effective last day. The calculator offers a “roll back to weekday” option for this. Bank holidays are paid notice days but not working days; if your last day lands on one, the previous working day is usually treated as your last in practice. The day still counts for the notice period itself.
What if your employer disagrees?
The date is set by the notice clause in your contract, not by what either side wants on the day. If your employer accepts a shorter notice, your employment ends earlier; if they want you off sooner without agreement, they have to pay PILON for the unworked portion. See the PILON calculator for the arithmetic.
Related calculators and guides
- Notice period calculator — the same calculator on the home page.
- PILON calculator — gross payment in lieu of notice.
- Garden leave calculator — same date math but with non-compete stacking.
- 3-month notice period calculator — most senior-role notice is three months.
- Handover plan generator — week-by-week handover personalised to your notice length.
- Resignation letter generator — short letter ready to send.
- How notice periods work in the UK
- The complete UK resignation guide
Frequently asked questions
- How is the final working day calculated?
- Convention: the day you hand in your resignation is day zero. The notice period is added on top. If you give 1 month's notice on the 15th of June, your final working day is 15th of July (the next month's same calendar day). Notice in weeks adds calendar days; notice in months follows calendar months and clamps to the last day of the target month when needed (e.g. 31 January + 1 month = 28 February in a non-leap year).
- Does the final working day fall on a weekend?
- Strictly, yes — if your notice period lands on a Saturday or Sunday. In practice, most employers treat the last working weekday as your final day. The calculator can roll the date back to the preceding Friday if you tick the option.
- Does the final working day include bank holidays?
- Bank holidays count as paid notice days but they're not normally a working day. If your final working day lands on a bank holiday, the previous working weekday is usually treated as your last day in practice.
- Can my employer change my final working day?
- Only with your agreement, or if they pay PILON for the difference. They can put you on garden leave (which doesn't change the date), or they can pay you off early using PILON (which makes the PILON date your last day of employment).
- Is the final working day the same as the termination date?
- Yes, for working notice and garden leave: the final working day at the end of your contractual notice is the date your employment legally ends. For PILON, the termination date is whenever the PILON is paid, which is typically immediate.
General information. Your contract is the source of truth for your specific notice clause. For ambiguous wording, contact ACAS or an employment-law solicitor.