Methodology

Primary sources

PlainMaternity content derives exclusively from authoritative UK government primary sources. Every statutory amount, eligibility criterion, and timeline rule has a direct citation back to one of:

• gov.uk — Maternity pay and leave: consumer-facing canonical page for SMP and statutory maternity leave.
• gov.uk — Paternity pay and leave: canonical page for SPP, updated for the 2024 splitting rules.
• gov.uk — Shared Parental Leave and Pay: rules, eligibility, and curtailment process.
• gov.uk — Maternity Allowance: the DWP-administered route for the self-employed and ineligible-for-SMP claimants.
• gov.uk — Tax-Free Childcare: eligibility and operation of the £2-for-every-£8 top-up scheme.
• HMRC — Rates and allowances: Statutory Payments: the annual uprating publication, source of every flat-rate amount.
• Primary legislation: Social Security Contributions and Benefits Act 1992 (SMP, MA); Statutory Maternity Pay (General) Regulations 1986; Paternity and Adoption Leave Regulations 2002; Shared Parental Leave Regulations 2014; Children and Families Act 2014; Childcare Payments Act 2014; Paternity Leave (Amendment) Regulations 2024.
• ACAS: practical workplace application of the statutory framework.

Editorial pipeline

Our editorial pipeline is structured around the rule that every statutory amount on every page must derive live from the database — no hand-typed numbers in prose. The pipeline:

1. Source review: editorial scan of the source pages and rate publication for the current tax year.
2. Database update: rate tables in the SQLite database (statutory_rates, leave_types, stats) updated with the new figures, citation URLs, and "last_updated" timestamps.
3. Schema validation: automated checks that every leave type has all required fields populated.
4. Pre-deploy verification: build runs in CI, full pre-push integrity scan covering 93+ source checks.
5. Post-deploy monitoring: Sentry error tracking, Uptime Kuma availability checks, weekly editorial cycle to catch source-page changes.

Currency and refresh cadence

UK statutory parental-pay rates uprate annually each April. PlainMaternity refreshes within 30 days of each April uprating. Spring Budget and Autumn Budget announcements occasionally introduce mid-year changes — these are integrated within 30 days of publication. The Paternity Leave (Amendment) Regulations 2024 (effective April 2024) introduced the splitting rules for the 2-week SPP entitlement — already integrated in our current content.

Our content reflects the 2026-27 tax year rules. The flat rate of £187.18/week is the indicative figure for the April 2026 uprating; if HMRC's final figure differs slightly when published, we will refresh within 30 days.

How we handle uncertainty

We do not extrapolate beyond what HMRC, GOV.UK, ACAS, or primary legislation explicitly states. Where a borderline case is genuinely ambiguous (for example, "what counts as continuous employment if there was a 1-week unpaid break?"), we surface the ambiguity, link to ACAS guidance, and recommend professional advice. We do not invent numerical certainty where none exists.

For calculator outputs, we explicitly use the approximation "AWE = annual salary ÷ 52" and disclose this. The formal HMRC AWE definition (8 weeks weekly-paid, 2 months monthly-paid ending qualifying week) is documented on every calculator page.

Editorial corrections

If you find an error — a wrong rate, an outdated rule, a misleading worked example — email hello@plainmaternity.co.uk with the page URL and the correction. We respond within 5 working days, refresh content within 14 days if substantive, and publish a corrections log in the bottom-of-page changelog where appropriate.

What this site is not

PlainMaternity provides a free reference and projection tool. It is not regulated financial or employment-rights advice. For personalised employment-rights questions consult ACAS (0300 123 1100, free), Citizens Advice, or Maternity Action (0808 802 0029, free). For statutory-payments helpline call HMRC on 0300 200 3211. For complex employment-rights disputes consult a UK employment solicitor.