Calculator standard
A calculator must identify the decision it supports, show its formula, label the period and units, explain assumptions and limitations, and include a worked example. Inputs are processed locally in the browser. A calculator is not presented as a tax return, legal conclusion or personalised professional recommendation.
Sources and changing rules
Rules, thresholds, rates and deadlines can change. Where they affect a result, Tool IQ links to a current primary or official source and states when the method was reviewed. Users should confirm material decisions with the relevant authority or a qualified adviser.
AI assistance
AI may assist with research organisation, drafting and quality checks. It is not treated as a source. Articles disclose AI assistance, changing claims require current primary evidence, and a publishing schedule never justifies thin or repetitive content.
Commercial independence
Calculators remain free. Partner recommendations are labelled as independent, affiliate or sponsored. Commercial relationships do not change a calculator result, and calculator inputs are never attached to a partner click.
Corrections and updates
Publication and modified dates reflect real work. We do not change dates merely to make a page look fresh. If a method or factual statement needs correction, the page is updated and rechecked before its modified date changes.
Scope and accountability
Tool IQ is built for UK and US small-business decisions, with separate regional routes where terminology or rules differ. Questions about a page, source or correction can be sent through the contact page.