NHS Pregnancy Due Date & Maternity Leave Calculator
Calculate your baby's due date and key NHS maternity milestones with our **NHS Pregnancy Calculator** for **2026/27**. This free tool uses your **Last Menstrual Period (LMP)** or **IVF Transfer Date** to estimate your due date. Crucially for NHS staff, it calculates your **Qualifying Week** (the 15th week before your due date, which determines your OMP/SMP eligibility) and the **earliest date you can start your NHS maternity leave** (11 weeks before your due date).
Reference Salary Tables & Quick Facts
NHS Pregnancy Overview & Calculation Basis
This calculator operates under the official 2026/27 Agenda for Change and NHS Terms and Conditions of Service. All calculations are performed in real time as you adjust inputs.
| Deduction / Allowance | Rate / Threshold (2026/27) |
|---|---|
| Personal Allowance | £12,570 (Standard Tax Code: 1257L) |
| National Insurance | 8% on earnings between £12,570 and £50,270 (2% above) |
| NHS Pension Tiers | 5.2% to 12.5% based on pensionable pay |
Frequently Asked Questions
NHS Payroll Deductions & Tax Mitigation
Your monthly NHS take-home pay is affected by various statutory and voluntary payroll deductions. Understanding how these are calculated can help you optimize your net income:
Salary Sacrifice Benefits
Schemes like Cycle to Work or lease cars are deducted from your gross pay before tax and NI are calculated, reducing your taxable income.
Pension Tax Relief
NHS Pension contributions are deducted from your gross salary before income tax is calculated, providing automatic tax relief at your marginal rate.
Student Loan Repayments
Student loans (Plan 1, 2, 4, 5, or Postgraduate) are calculated on your gross earnings above the specific plan threshold and deducted automatically.
