Maternity leave calculator
Estimate maternity leave dates and statutory pay in one place
Enter the due date, employment start date, and average weekly earnings to see the leave window and whether statutory maternity pay is likely to apply.
Tool result
Result
What it does
Turn due dates and earnings into a usable leave and SMP picture
This calculator uses the expected week of childbirth to work backwards to the qualifying week and earliest leave start date, then estimates statutory maternity pay using the current weekly rules.
It is useful when HR needs a quick planning view before moving into the final employee-specific process and policy checks.
What this tool includes
- Qualifying week timing
- Earliest maternity leave start date
- Estimated leave end date
- Weekly SMP estimates and total pay view
Related HR tools
Explore other tools if you want to keep building out the wider workflow around this task.
Frequently asked questions
How long is statutory maternity leave?
Up to 52 weeks.
What is needed to qualify for SMP?
Continuous service by the end of the qualifying week and average weekly earnings at or above the statutory threshold.
Does an early birth change the leave start date?
Yes. If the baby arrives earlier than the planned leave start, leave usually starts the day after the birth.
Can I use this result as a final policy or legal decision?
No. Use the result as a practical planning estimate, then review it against your policy, legal requirements, and the specific employee or hiring context.
Is this tool designed for UK HR scenarios?
Yes. Where the calculation relies on statutory assumptions, the current version is designed around UK employment and HR conventions.
