Notice Period Calculator Form
Plotly Notice Timeline Graph
The chart shows cumulative counted notice days across the full timeline window.
Example Data Table
| Scenario | Start Date | Length | Basis | Workweek | Holiday Dates | Leave Offset | Monthly Salary | PIL Days | Formal End | Last Active Day | Estimated PIL |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sample resignation | 2026-04-15 | 30 | Calendar days | 5 days | 2026-05-01 | 2 | 90000 | 10 | 2026-05-14 | 2026-05-12 | 30000 |
| Working-day notice | 2026-06-01 | 20 | Working days | 6 days | 2026-06-17 | 1 | 75000 | 5 | 2026-06-24 | 2026-06-23 | 12500 |
Formula Used
1) Formal end date
For calendar-day notices, the tool adds the required number of days to the start date. If the start day counts, one day is subtracted from the addition step. For weekly notices, weeks are converted into seven-day blocks. For monthly notices, full calendar months are added. For working-day notices, only valid working days are counted.
2) Last active working day
Last active working day = Formal end date minus leave offset working days. The calculator moves backward across valid workdays and skips holidays or weekly off days.
3) Payment in lieu estimate
Daily rate = Monthly salary ÷ selected salary divisor.
Estimated payment in lieu = Daily rate × payment in lieu days.
4) Timeline counts
The calculator also measures total calendar days, working days, excluded non-working days, and counted notice days within the full notice window.
How to Use This Calculator
- Enter the notice start date from the contract, letter, or HR confirmation.
- Choose the notice length and the basis used by the clause.
- Decide whether the first day should count toward the notice period.
- Set the workweek pattern so working-day calculations reflect the real schedule.
- Add holiday dates when the clause excludes those days from counting.
- Enter leave offset days to estimate the final active attendance day.
- Add salary and payment in lieu days if you want a payout estimate.
- Submit the form and review the summary, graph, and download options.
Frequently Asked Questions
1. What is a notice period calculator?
It estimates when a notice period starts, when it ends, and how leave, holidays, and workday rules affect the timeline. It also helps model payment in lieu.
2. Can I use calendar days and working days?
Yes. The form supports calendar days, working days, weeks, and months. Choose the basis that matches the exact wording used in the contract or policy.
3. Why does the include start day option matter?
Some clauses count the notice date itself, while others begin counting from the following day. This choice can move the end date by one day.
4. How are holidays handled?
Holiday dates are treated as non-working days when the notice basis is working days. They are also excluded when finding the last active working day.
5. What does leave offset mean here?
Leave offset represents paid leave, garden leave, or a similar non-attendance period at the end of notice. The calculator uses it to estimate the final active working day.
6. Is payment in lieu legally exact?
No. It is an estimate based on the salary and divisor you choose. Actual payroll treatment may include allowances, deductions, taxes, and contract-specific wording.
7. Can this replace legal review?
No. It is a planning tool only. Local labour law, collective agreements, and internal policy can change how notice is counted or paid.
8. When should I use the months option?
Use it when the contract says the notice period is one month, two months, or another full-month term. It is better than approximating months with flat day counts.