NHS Maternity Pay Calculator (Estimate)
Use this tool to estimate what you could receive across 52 weeks of maternity leave under NHS contractual maternity pay and/or Statutory Maternity Pay (SMP).
This calculator is for planning only and may not reflect all local payroll rules, salary sacrifice effects, or individual contract variations. Always confirm figures with your HR/payroll team.
How NHS maternity pay usually works
If you work for the NHS in England, Wales, Scotland, or Northern Ireland, maternity pay often combines two parts:
- NHS Occupational/Contractual Maternity Pay (enhanced pay from your employer), and
- Statutory Maternity Pay (SMP) (paid through payroll if eligible).
Under common NHS terms, employees with enough continuous NHS service may receive:
- 8 weeks full pay (inclusive of any SMP),
- 18 weeks half pay plus SMP (capped at normal full pay),
- 13 weeks SMP only,
- 13 weeks unpaid leave.
Total leave is usually up to 52 weeks, but your exact entitlement depends on your contract, service history, and eligibility checks.
What this calculator includes
1) Service-based NHS enhancement test
The tool uses your continuous NHS service (in months) to estimate whether enhanced NHS maternity pay applies. In this model, 12 months or more triggers enhanced NHS phases shown above.
2) SMP pattern
When SMP is selected as eligible, it is estimated as:
- Weeks 1–6: 90% of your average weekly earnings
- Weeks 7–39: lower of standard SMP rate and 90% of average weekly earnings
- Weeks 40–52: £0
3) Full 52-week forecast
You get a headline total, monthly average estimate, and a phase-by-phase summary. If you choose “Show detailed week-by-week table,” you will also get a full breakdown for all 52 weeks.
Why planning ahead matters
Maternity leave budgeting is easier when you map out income changes before your leave starts. Even where total entitlement is generous, weekly amounts can drop significantly during SMP-only and unpaid periods.
It can help to build a simple plan for:
- essential monthly costs (rent/mortgage, bills, childcare deposits),
- timing of any annual leave before/after maternity leave,
- partner leave overlap and household cash flow,
- return-to-work date options and flexible working discussions.
Example scenarios
Higher service, enhanced entitlement
If someone has 18 months continuous NHS service and strong weekly earnings, the first 26 weeks are usually much higher due to full-pay and half-pay phases, with SMP-only later.
Lower service, SMP-only pattern
If service is below NHS enhancement thresholds, pay may follow the statutory pattern only. That means a steeper reduction after the first 6 weeks.
Important notes before relying on estimates
- Local policies and national terms can change over time.
- Pension, tax, and National Insurance can alter net take-home pay.
- Allowances, shift premiums, and salary sacrifice arrangements may affect calculations.
- Your employer may apply specific payroll timing rules not shown here.
For an official figure, request a written maternity pay breakdown from your NHS employer’s HR/payroll team.
Quick checklist before maternity leave
- Confirm your due date and qualifying week details with HR.
- Check continuous NHS service calculation in writing.
- Submit maternity leave notice forms on time.
- Verify pension impacts and any repayment terms if applicable.
- Set a savings buffer for lower-pay weeks later in leave.
Bottom line: This NHS maternity pay calculator is a practical planning tool to help you understand likely income stages across maternity leave. Use it early, then verify every key figure with your trust’s HR/payroll guidance.