Fact-Check Policy
Our commitment to accuracy, transparency, and reliable information for UK residents
Our Commitment to Accuracy
At UK Calculator, we understand that financial decisions have real-world consequences. That's why we've implemented rigorous fact-checking procedures to ensure every calculator, rate, and piece of information on our platform is accurate, current, and trustworthy.
This policy outlines how we verify information, the sources we use, and how we handle corrections when errors occur.
Our Fact-Checking Process
Every piece of content and calculator on UK Calculator goes through a comprehensive verification process:
Research & Initial Development
Content is researched and developed using official UK government sources, regulatory bodies, and authoritative publications only.
Expert Review
A qualified professional (chartered accountant, financial analyst, or subject matter expert) reviews all calculations and content for accuracy.
Cross-Reference Verification
All figures are cross-referenced against at least two independent authoritative sources before publication.
Testing & Quality Assurance
Calculators undergo extensive testing with real-world scenarios to ensure accurate results across all input ranges.
Ongoing Monitoring
Published content is regularly reviewed and updated when UK rates, regulations, or guidelines change.
Our Authoritative Sources
We only use trusted, official sources for our data and calculations:
HMRC
Tax rates, National Insurance, allowances, and official tax guidance
Gov.uk
Official government information on benefits, regulations, and public services
Bank of England
Interest rates, inflation data, and monetary policy information
ONS
Statistical data, salary benchmarks, and economic indicators
FCA
Financial regulations and consumer protection guidelines
NHS
Health guidelines, BMI classifications, and medical reference data
Land Registry
Property data, stamp duty rates, and property transaction information
DWP
State pension, benefits, and welfare information
We never use unverified sources, social media claims, or outdated information. When official sources conflict, we follow HMRC and Gov.uk as the primary authority for UK-specific matters.
Update Procedures
UK financial regulations change regularly. Here's how we stay current:
Scheduled Updates
- Tax Year Changes (April): All tax calculators updated within 48 hours of new rates taking effect
- Budget Announcements: Calculator updates published within 24 hours of confirmed changes
- Quarterly Reviews: All calculators audited against current official rates
- Monthly Checks: Sampling of calculators verified against HMRC/Gov.uk
Emergency Updates
When significant changes occur (e.g., emergency Budget, rate changes, regulatory updates), we:
- Immediately flag affected calculators with a notice
- Update calculations within 24 hours
- Review related content for accuracy
- Publish update notices on affected pages
Corrections Policy
Despite our rigorous processes, errors can occasionally occur. When they do:
How We Handle Errors
- Immediate Action: Errors are corrected as soon as they are discovered or reported
- Transparency: Significant corrections are noted on the affected page
- Communication: Users who reported errors receive confirmation and thanks
- Root Cause Analysis: We investigate how the error occurred to prevent recurrence
Reporting Errors
If you believe you've found an error in any of our calculators or content, please report it immediately:
- Email: support@ukcalculator.com
- Contact Form: Contact Us (select "Data Accuracy Question")
Please include the calculator name, the values you entered, and the result you believe is incorrect along with your expected result and source.
Editorial Independence
Our fact-checking process is completely independent of any commercial considerations:
- Advertisers have no influence over our content or calculations
- All calculators are developed solely for user benefit
- We do not accept payment for favorable coverage or calculator results
- Our editorial and advertising teams operate independently
Limitations & Disclaimers
While we strive for accuracy, users should understand:
- Calculators provide estimates based on the information provided
- Individual circumstances may affect actual outcomes
- Results should not replace professional financial, tax, or medical advice
- Users should verify important calculations with qualified professionals
- We are not FCA regulated and do not provide financial advice
For important financial decisions, always consult a qualified accountant, financial adviser, or relevant professional.
Contact Our Fact-Check Team
Questions About Our Accuracy Standards?
We welcome questions about our fact-checking processes and are happy to provide source documentation for any of our calculations.
Contact UsNext Scheduled Review: April 2026 (Tax Year Update)
Related Policies: Editorial Policy | Privacy Policy | Terms of Service | Disclaimer
Pro Tips for Accurate Results
- Double-check your input values before calculating
- Use the correct unit format (metric or imperial)
- For complex calculations, break them into smaller steps
- Bookmark this page for quick future access
Understanding Your Results
Our Fact Check Policy provides:
- Instant calculations - Results appear immediately
- Accurate formulas - Based on official UK standards
- Clear explanations - Understand how results are derived
- 2025/26 updated - Using current rates and regulations
Common Questions
Is this calculator free?
Yes, all our calculators are 100% free to use with no registration required.
Are the results accurate?
Our calculators use verified formulas and are regularly updated for accuracy.
Can I use this on mobile?
Yes, all calculators are fully responsive and work on any device.
Our Fact-Checking Methodology in Detail
Accuracy is not optional for a calculator website. A single wrong rate or formula can lead users to make financial decisions based on incorrect information. That is why we have developed a rigorous, multi-step fact-checking methodology that every calculator and piece of content must pass before publication.
Our fact-checking process follows a structured pipeline with four distinct stages: Source Verification, Formula Validation, Cross-Reference Testing, and Ongoing Monitoring. Each stage has specific criteria that must be met before content advances to the next.
Stage 1: Source Verification
Every data point used in our calculators must be traceable to an authoritative primary source. We maintain a hierarchy of trusted sources:
- Primary legislation and statutory instruments - The Finance Act, Social Security Contributions and Benefits Act, and related UK laws as published on legislation.gov.uk
- HMRC official guidance - Tax rates, thresholds, and allowances as published on GOV.UK and in HMRC's internal manuals
- ONS published statistics - For demographic, economic, and health data used in our non-tax calculators
- NHS and NICE guidelines - For health-related calculators such as BMI, BMR, and calorie calculations
- Bank of England data - For interest rates and monetary policy data used in mortgage and savings calculators
We never rely on secondary sources (such as news articles or blog posts) as the sole basis for any calculation. If a rate or threshold is reported in the media, we always verify it against the official government source before updating our calculators.
Stage 2: Formula Validation
Once the source data is verified, we validate the mathematical formulas used in each calculator. This involves:
- Comparing our calculation logic against HMRC's published examples and worked calculations
- Running test cases with known inputs and expected outputs (for example, using HMRC's published tax calculation examples)
- Peer review by a second team member who independently verifies the formula implementation
- Edge case testing for boundary values (such as income exactly at a tax band threshold)
Stage 3: Cross-Reference Testing
Before any calculator goes live, we cross-reference its output against at least two independent sources. For tax calculators, this typically means comparing results against HMRC's own online calculators and at least one reputable third-party tool. Any discrepancies are investigated and resolved before publication.
Stage 4: Ongoing Monitoring
Fact-checking does not stop at publication. We continuously monitor for changes that could affect our calculators, including Budget announcements, mid-year rate changes, and corrections to previously published government data. Our monitoring includes subscribing to HMRC and Treasury update feeds, and we aim to update affected calculators within 24 hours of any official rate change.
Our Correction Policy
Despite our thorough verification processes, errors can occasionally occur. When they do, we are committed to correcting them quickly and transparently. Our correction policy works as follows:
Reporting an Error
If you believe any calculation on our site is incorrect, please report it through our contact form with the subject "Calculation Error Report". Include: the calculator page URL, the values you entered, the result you received, and the result you expected. If possible, include a link to the source supporting the correct figure.
How We Handle Corrections
- Acknowledgement - We acknowledge all error reports within 24 hours
- Investigation - A team member verifies the reported error against primary sources within 48 hours
- Correction - If confirmed, the error is corrected immediately and the calculator is re-tested
- Notification - The person who reported the error is notified of the outcome
- Documentation - Significant corrections are logged internally to improve our processes
For minor typographical errors, we correct them promptly without formal notice. For significant calculation errors that could affect financial decisions, we aim to correct the issue within 4 hours of confirmation and may add a temporary notice to the affected page alerting users to the change.
Our Commitment to Accuracy
We believe that trust is built through transparency and accountability. By publishing this detailed fact-check policy, we hold ourselves to a high standard and give you the information you need to evaluate the reliability of our tools. If you have any questions about our fact-checking process or want to verify the sources behind any particular calculator, please do not hesitate to get in touch.