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Calculadora.co.uk

Editorial policy

How we commission, write, fact-check, review and update content on Calculadora.co.uk.

Last updated 15 Apr 2026

Editorial policy

Principles

Everything we publish is guided by four principles:

  • Accuracy — every formula is unit-tested and every UK number traceable to a primary source (GOV.UK, HMRC, NHS, Bank of England, ONS).
  • Plain English — we explain things in the fewest words that make them true. No jargon for jargon's sake.
  • Independence — no advertiser or partner sees a draft before publication. No one can pay to change a conclusion.
  • Humanity — a human writes, a human reviews, a human replies to your email.

How content is made

Each calculadora moves through a fixed workflow:

  • Brief — a topical-map entry defines the audience, the query network and the authoritative sources to cite.
  • Logic — a pure function in `lib/calculadoras/*` encodes the maths, with unit tests for every band, rule and edge case.
  • Explainer — the author drafts a 1,500–2,500 word guide with worked examples, a direct-answer block and an FAQ.
  • Review — a subject-matter expert checks the numbers, tone and legal accuracy. Dates updated.
  • Quality gates — Lighthouse ≥95 perf, axe-core 100% a11y, Rich Results validator passes, links resolve.
  • Publish — version-controlled, cache-busted, and the AI crawlers are pinged via `llms.txt` and IndexNow.

Sources we trust

In priority order for UK facts:

  • GOV.UK and agency sub-domains (HMRC, DWP, VOA, DLUHC).
  • The NHS, NICE and the Royal Colleges for health guidance.
  • The Bank of England, FCA and MoneyHelper for finance and regulation.
  • ONS for demographics and statistics.
  • Legislation.gov.uk for the primary text of statutes and regulations.

Updates and review cycles

Tax calculadoras are re-checked after every Spring and Autumn Statement, and within 24 hours of any mid-year HMRC rate change. Health calculadoras are reviewed at least annually against the latest NHS and NICE guidance. Every page shows a "Last updated" date derived from the underlying content file.

AI use

We occasionally use large language models to draft, proof-read and suggest revisions — never to publish unchecked. Final responsibility for every word sits with a named human editor.