About
About Deadline Calculator
Who we are, why you can trust our deadlines, and how every guide is reviewed before it goes live.
How the site is edited
Deadline Calculator is produced and maintained editorially. Every guide is traced to a primary source — legislation.gov.uk, ICO guidance, FCA rules or GOV.UK — and each page carries a dated "Last reviewed" marker so you can see when it was last checked.
The standard is deliberately process-based rather than personality-based: explain the rule, show a worked example with real UK dates, link back to the source, and correct errors at the page level. The full standard is published on the editorial standards page, with the review and correction process in the editorial policy.
We do not use named author profiles, because we would rather point you at sourcing you can check than at a biography you cannot.
Why trust our deadline calculations
- Primary sources first. Every guide cites the statute, statutory instrument, or regulator guidance behind the rule — the FOI Act 2000, UK GDPR and Data Protection Act 2018, the Consumer Contracts Regulations 2013, the Employment Rights Act 1996, and FCA complaint-handling rules.
- Dated reviews. Each guide carries a "Last reviewed" date, and content is re-checked when legislation or regulator guidance changes.
- Worked examples. Rules are illustrated with real UK dates so you can see exactly how weekends and bank holidays change the answer.
- A clear disclaimer. We are a planning aid, not a substitute for legal advice — and we say so on every page.
What you'll find here
- FOI deadline calculators - 20 working day response dates under the Freedom of Information Act 2000 and the Environmental Information Regulations 2004.
- SAR deadline calculators - one calendar month time limits for subject access requests under UK GDPR.
- Notice period calculators - end dates for 1 week, 4 weeks, 1 month, and custom notice periods, including tenancy notice tools.
- Cooling-off period calculators - 14 day cancellation deadlines under the Consumer Contracts Regulations.
- Complaint response calculators - FCA-style 8 week, NHS-style, and 20 working day complaint timelines.
- Business day calculators - quick tools for adding 5, 10, or 30 business days from today or before a date.
- Invoice and payment calculators - net 30 due dates, late payment interest, and holiday entitlement tools.
- Free downloadable templates - deadline tracker spreadsheets for SAR, FOI, complaint, and notice workflows.
Important: This site is a planning aid, not legal advice. Deadlines can depend on facts, policy wording, jurisdiction, service rules, pauses, extensions and changing law. Always verify important deadlines with the official guidance or a qualified adviser.