About
About Deadline Calculator
Built by the Deadline Calculator team - helping UK professionals count deadlines accurately, without the spreadsheets.
Who we are
Deadline Calculator is a UK-based team of compliance and legal operations professionals who kept running into the same problem: missed deadlines, miscounted working days, and manual spreadsheets that were slow and error-prone.
We built these tools to make deadline calculation faster and more reliable - so that FOI officers, DPOs, HR teams, legal professionals, and small businesses can check a date in seconds rather than building a custom spreadsheet every time a deadline lands on a weekend or bank holiday.
We keep the calculators aligned with current UK legislation and regulator guidance, including the ICO, FCA, and relevant statutory instruments. When the law changes, we update the tools.
Why this site exists
Most UK deadline rules look simple on paper: "20 working days," "one calendar month," "14 days from delivery." In practice, counting them correctly means knowing whether the clock starts on the day of receipt or the next working day, whether weekends and bank holidays are excluded, and what happens when the deadline lands on a non-working day.
Deadline Calculator handles these edge cases so you can check a date quickly without building a spreadsheet or second-guessing the rules. Every calculator is built around UK-specific legislation and regulator guidance, including the Freedom of Information Act 2000, the UK GDPR / Data Protection Act 2018, the Consumer Contracts Regulations 2013, and FCA complaint-handling rules.
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.