maternity leave calculator uk

How this maternity leave calculator UK works

This calculator is designed for employees in the UK who want a quick estimate of maternity leave dates and Statutory Maternity Pay (SMP). It uses the common SMP structure:

• Up to 39 weeks of SMP in total
• First 6 weeks at 90% of average weekly earnings
• Remaining 33 weeks at the lower of 90% earnings or standard SMP rate
• Up to 52 weeks maternity leave overall (not all weeks are paid)

You’ll also get key date checks, including your qualifying week and the earliest typical point maternity leave can start.

UK maternity leave basics

Ordinary and Additional Maternity Leave

Eligible employees can usually take up to 52 weeks total:

• Ordinary Maternity Leave: first 26 weeks
• Additional Maternity Leave: next 26 weeks

You do not have to take all 52 weeks, but if you return early you normally need to give proper notice to your employer.

Statutory Maternity Pay (SMP)

SMP is separate from leave length. You can take 52 weeks leave, but SMP is generally paid for up to 39 weeks if eligibility rules are met.

Many employers offer enhanced maternity schemes on top of statutory rules, so check your contract and staff handbook for better terms.

Eligibility checklist (quick reference)

You generally need all of the following for SMP:

• Be an employee (not self-employed)
• Be continuously employed for at least 26 weeks by the end of the qualifying week
• Earn at least the Lower Earnings Limit on average
• Give the correct notice and evidence (for example, MATB1 when required)

The calculator gives an estimated pass/fail snapshot based on dates and earnings, but your payroll team makes the final determination.

What to prepare before using the calculator

1) Accurate average weekly earnings

Your earnings figure should reflect the relevant payroll reference period used by your employer. If you are unsure, ask payroll for the exact average used for SMP calculations.

2) Your intended leave start date

You can change this later in discussion with your employer, but using a realistic start date helps you plan cash flow more accurately.

3) Current SMP rate and earnings threshold

Rates can change each tax year. This calculator lets you edit both the standard SMP weekly rate and the Lower Earnings Limit so you can stay current.

Budget planning tips during maternity leave

• Build a monthly spending plan before leave begins
• Check if your employer offers enhanced maternity pay
• Include unpaid leave weeks in your forecast
• Review childcare costs early and compare providers
• Check eligibility for partner leave options and relevant benefits

Frequently asked questions

Does SMP continue for all 52 weeks of maternity leave?

No. SMP is generally up to 39 weeks, while leave can be up to 52 weeks.

What if I do not meet SMP eligibility?

You might still qualify for other support such as Maternity Allowance, depending on your circumstances. Check official guidance and claim routes.

Can I rely on this calculator for legal decisions?

No. Treat this as a planning tool. For legal or payroll certainty, use official GOV.UK resources and your HR/payroll team.

Final note

A maternity pay calculator helps reduce uncertainty, but it works best when your data is accurate. Keep your dates, earnings, and employer policy details updated, then revisit your estimate if plans change.