Accuracy and accountability
How 1Dollars reviews reports, corrects errors and explains material changes
This policy explains how we handle possible errors in calculators, formulas, examples, written content, sources, links and page functionality across 1Dollars.org.
Our commitment
1Dollars aims to publish accurate, understandable and transparent calculators and educational information. Errors still occur. A formula may be implemented incorrectly, a rule may change, a unit label may be unclear or an example may stop matching the calculator.
We review specific, supported reports and correct verified problems. The action depends on the severity, reach and likely impact of the issue. A material calculation error receives more urgent attention than a spelling mistake that does not change meaning.
We do not change a result only because it differs from another website, quote or professional estimate. We first compare the inputs, formula, units, effective period, rounding method and exclusions.
What this policy covers
Calculation logic
Formulas, conditional rules, thresholds, compounding, conversions, totals and displayed outputs.
Inputs and units
Labels, defaults, validation, currency, measurement units, time periods and input interpretation.
Written content
Definitions, instructions, examples, tables, assumptions, limitations and statements of fact.
Sources and dates
Source links, tax years, financial years, rule periods, reference dates and update information.
Page functionality
Broken controls, missing results, mobile layout problems, inaccessible elements and browser issues.
Site navigation
Broken links, incorrect destinations, duplicate pages and misleading category placement.
What counts as a correction
A correction is needed when published information or functionality is demonstrably wrong, materially incomplete, outdated for the period claimed, or inconsistent with the method stated on the page.
Examples include:
- A calculator applies the wrong formula or conditional branch.
- A percentage is treated as a decimal, or a decimal is treated as a percentage.
- A tax threshold, rate, contribution limit or rule period is outdated.
- A unit conversion uses the wrong factor or applies a linear factor to area or volume.
- The written formula, worked example and live output do not agree.
- A default value is described as current when it is illustrative or outdated.
- A typo changes the meaning of a formula, limit, date, warning or instruction.
- A link points to the wrong source, calculator or policy page.
- A technical or accessibility problem prevents users from entering values or reading results.
What is not automatically an error
Two results may differ even when both methods are valid. A difference requires investigation, not an immediate replacement of one result.
- A lender quote includes fees, insurance, dates or rounding rules excluded from a general EMI estimate.
- A tax result uses a different filing status, regime, jurisdiction, deduction or financial year.
- An investment projection uses a different contribution date, compounding frequency, fee or assumed return.
- A health equation uses a different recognized formula or population.
- A statistical tool uses a sample method while another uses a population method.
- A market-linked result changes because the price, rate or exchange value changed after the calculation.
- The entered information is incomplete, mistyped or expressed in the wrong unit.
How we prioritize reports
We assess the likely harm, size of the error, number of affected pages, reliability of the evidence and whether the problem affects a high-impact topic.
| Priority | Typical issue | Likely action |
|---|---|---|
| Urgent | A calculation or technical problem presents a credible financial, health, legal, engineering, safety or security risk. | Review promptly. Restrict, label or temporarily withdraw the affected tool when continued use would be misleading. |
| Material | Wrong formula, rate, threshold, unit, rule period or output affecting decisions or many users. | Verify the method, correct the issue, retest affected cases and add an update or correction note when useful. |
| Standard | Broken source, unclear label, stale example, inconsistent explanation, mobile problem or accessibility issue. | Confirm the issue, repair the affected element and check nearby content for the same problem. |
| Minor | Spelling, punctuation, styling or wording that does not change the result or material meaning. | Correct during routine maintenance. A public correction note is usually unnecessary. |
Priority is not determined by how many messages we receive about an issue. One report with reproducible inputs and an authoritative source is more useful than repeated unsupported claims.
Our review and correction process
- Record the report. We identify the URL, issue type, evidence, affected output and possible user impact.
- Reproduce the problem. We enter the reported values and check the device, browser, units and sequence of actions when relevant.
- Verify the expected method. We compare the implementation with the formula, official rule, standard, source period or documented assumption.
- Determine the scope. We check whether the issue affects one example, one calculator, a shared component or several related pages.
- Apply the correction. We update the calculation, content, source, label, link, layout or validation responsible for the problem.
- Retest the result. We run the reported case plus normal, zero, boundary, invalid and nearby cases suited to the tool.
- Review the explanation. We confirm that the formula, example, assumptions, effective date and live output agree after the change.
- Publish and document. We update the review date or add a correction note when the change materially affects meaning or results.
How calculator errors are verified
Calculator reports need enough detail to reproduce the exact result. We first separate calculation logic from display, rounding and input problems.
Where relevant, the review includes:
- Recalculating the result manually or with an independent reference method
- Checking percentage, annual-to-periodic rate and unit conversions
- Testing values below, at and above a threshold
- Testing zero interest, zero quantity, negative values and empty required fields
- Comparing intermediate values before final rounding
- Checking formulas shared by related calculators
- Confirming the country, tax year, financial year and rule effective date
- Testing the result on mobile and desktop when the issue involves the interface
A corrected output should pass the reported case and a wider set of cases. Fixing one example without checking the underlying logic may create a new error elsewhere.
How corrections are disclosed
The notice depends on the effect of the change.
- Minor edit: A grammar, formatting or non-material wording fix may be published without a separate note.
- Material update: A changed formula, rule, threshold, source period or important conclusion may receive an updated review date or a visible note.
- Major correction: A change that materially alters results or prior guidance may identify what was wrong, what changed and which users or periods were affected.
- Temporary withdrawal: A tool may be disabled or unpublished while a serious issue is investigated or rebuilt.
Illustrative correction note
Correction, August 15, 2026: We fixed the annual-to-monthly interest-rate conversion used in the payment calculation. We retested the payment, total repayment and total-interest outputs for standard and zero-interest cases.
The example above shows the format of a clear correction note. It does not describe an actual correction to a specific published calculator.
Corrections, updates and methodology changes
Not every change corrects an error.
- A correction fixes content or functionality that was wrong for the period or method claimed.
- An update adds a new tax year, current threshold, source, example or feature after circumstances change.
- A methodology change replaces one valid approach with another and should explain the new method when it materially changes results.
- A clarification improves labels, instructions or limitations without changing the calculation.
For time-sensitive tools, an older result is not necessarily evidence of an error if it was correct for the year or jurisdiction stated on the page.
Temporary withdrawal, replacement and retraction
We may restrict, replace, redirect or remove content when:
- The main calculation is materially unreliable and a prompt repair is not available.
- The source or rule set cannot be verified.
- The page creates a credible safety, privacy, security or legal risk.
- The tool is obsolete, duplicated or replaced by a clearer current version.
- A technical failure prevents reliable use across supported devices.
When practical, obsolete URLs are redirected to the closest useful replacement. Removal does not erase valid concerns. We retain enough internal information to understand the issue and reduce the chance of repetition.
Disagreements and conflicting sources
Some subjects have more than one accepted formula, convention or interpretation. We assess whether the page clearly identifies its chosen method and whether the method suits the stated use.
For regulated or time-sensitive topics, we give greater weight to current primary sources such as government departments, regulators, standards bodies and official program documents. Secondary sources help with explanation and cross-checking but do not override an applicable official rule without strong evidence.
If reliable sources conflict, we may add a limitation, identify the competing method, narrow the calculator's scope or delay a change until the applicable rule is clear. A commercial request, advertiser relationship or affiliate arrangement does not determine whether a correction is accepted.
Privacy and responsible reporting
Do not send passwords, one-time passwords, full payment-card numbers, bank statements, government identification numbers, tax identification numbers, medical records or confidential financial documents.
Use sample or redacted values whenever they reproduce the issue. If a screenshot is necessary, remove names, account numbers, addresses and other personal information first.
Privacy, copyright, legal-removal and account requests follow the applicable site policy or legal process. They are not treated as calculation corrections unless the published content is also inaccurate.
Report an error
Send enough information for us to reproduce and assess the issue:
- Exact page URL
- Every input and unit used
- Displayed result
- Expected result and calculation steps
- Country, jurisdiction, tax year or financial year when relevant
- Authoritative source supporting a rule-based correction
- Device, browser and screenshot for a technical problem
Email: contact@1dollars.org
Contact page: https://www.1dollars.org/p/contact-us.html
We review actionable reports, but we do not guarantee an individual reply or a fixed completion time. Severity, evidence and investigation complexity determine priority.
Related policies and resources
This Corrections Policy was reviewed and updated on August 15, 2026. We may revise it when our review process, calculator library or reporting requirements change.