WorthChex is a UK-focused financial calculator and information site. The aim is straightforward: give visitors a useful calculation, explain what sits behind it, and make the assumptions visible so the result can be understood rather than taken as a magic answer.
WorthChex covers everyday decisions such as budgeting, saving, borrowing, salary and take-home pay, mortgages, car finance, VAT and property taxes such as Stamp Duty. The calculators are designed to work in the browser without requiring a bank connection or an account.
Important concepts are explained in plain language, with worked examples and limitations where they help a visitor interpret the result. We avoid presenting a planning estimate as a lender decision, tax assessment or personalised financial advice.
For changeable UK rules, the site links to primary sources such as GOV.UK and other established public guidance. The methodology page explains the main calculation models and the boundaries of the tools.
The information on a page should make sense even when the calculator or advertising is ignored. A visitor should be able to learn something from the page itself.
When a model simplifies a real-world decision, the page should say what has and has not been included. This is especially important for tax, borrowing, property and investment-related calculations.
Guides link to relevant calculators and calculators link back to explanations. The goal is to help visitors move from a question to the right tool without getting lost.
Guides are built around a real visitor question and aim to answer it directly before asking the visitor to use a calculator. A page should contain explanation, examples, trade-offs and limitations rather than a collection of search terms.
Rules that can change, including tax, National Insurance, Stamp Duty and VAT, are checked against the relevant official guidance when affected pages are reviewed. The page links to the source so the reader can verify the rule for themselves.
Calculation changes are supported by the site's regression tests and methodology documentation. The aim is to keep the maths consistent with the explanation instead of treating the calculator as a black box.
Where a material rule changes, the relevant page is updated rather than silently relying on an old example. Guide pages may display a review date so readers can see when the editorial information was last checked.
WorthChex does not provide a personalised financial plan, approve credit, issue mortgages, decide tax liabilities, or guarantee investment returns. Results are estimates based on the information and assumptions shown on the relevant page.
For consequential decisions, check the current official guidance or the actual offer, statement or contract you are relying on. Where a calculation depends on facts that a calculator cannot know, treat the result as a planning scenario rather than a definitive answer.
The best place to understand a result is the calculator's own guide and methodology sections. Browse all calculators →
The core test for a WorthChex page is whether it still helps a visitor when the calculator and advertising are ignored. Each main tool is paired with an explanation of the inputs, a description of the model, a worked example or interpretation guide, and limitations that matter in real use.
WorthChex calculations are implemented in the site's own JavaScript rather than copied from another calculator. Regression tests are used when calculation logic changes.
Changeable UK tax and property rules are checked against GOV.UK. General money guidance is linked to established sources such as MoneyHelper where it helps explain the real-world context.
Results are presented as estimates. The site does not claim to approve credit, determine a personal tax liability or predict investment returns.
The calculator pages were reviewed for the structure of their inputs, explanations, worked examples, source links and limitations. The content review also looks for duplicated wording, empty sections, misleading precision and pages that would be difficult to understand without using the calculator.
For a financial decision that depends on a legal, tax or product rule, the relevant official source should have the final word. WorthChex aims to make that verification easy rather than asking visitors to trust an unexplained number.
GOV.UK Income Tax rates · GOV.UK National Insurance · GOV.UK SDLT rates · GOV.UK VAT rates