Editorial Policy

Who produces this content

All calculators and content on CalcBundle are produced and maintained by the CalcBundle team, which operates across three functional areas:

• Calculator Development Team — defines and implements calculation methodology, maintains the automated test suite, and validates formula accuracy against primary sources.
• Research & Editorial Team — researches industry benchmarks, writes supporting guides and worked examples, and explains methodology in plain English.
• Quality Review Team — cross-checks formulas and content against authoritative sources before publication and conducts quarterly reviews of reference data (tax brackets, fee tables, valuation multiples).

For more on our team structure, see the About page.

Our editorial standards

CalcBundle publishes calculators and supporting guides to help business owners make better decisions. We hold our content to a simple standard: it should be accurate, transparent about its assumptions, genuinely useful, and honest about its limits. We would rather show a clear estimate with its methodology than a false-precision “exact” number.

How our calculators are built and verified

• Primary source research. All formulas are derived from authoritative primary sources: IRS publications for tax calculators, Amazon Seller Central for FBA fee tables, Federal Reserve data for economic benchmarks, and established financial valuation standards for business calculators.
• Transparent formulas. Each calculator's method is documented on its page, including the core formulas and a worked example.
• Tested logic. Calculation code is separated from the interface and covered by an automated test suite, so results are consistent and predictable across updates.
• Clear assumptions. Where a result relies on assumptions — such as industry valuation multiples or marketplace fee estimates — we state them and label estimated figures as estimates.
• Independent of advertising. Advertising never influences the results a calculator produces or the methodology behind it.

Accuracy and update schedule

Our Quality Review Team reviews all reference data quarterly (January, April, July, October). Some inputs, such as IRS tax brackets and Amazon marketplace fees, change annually or more frequently; we track these and update them within 30 days of an official change being published. Each calculator page that uses time-sensitive data shows a "last reviewed" date so users can assess freshness. For official current figures always cross-reference the primary source:

• Federal income tax brackets: IRS inflation adjustments
• Amazon referral and FBA fees: Amazon Seller Central fee schedule
• Capital gains tax rates: IRS Topic 409

Use of AI tools

Some supporting content on CalcBundle is drafted with AI writing assistance. All AI-assisted content is reviewed, edited, and verified by our Research & Editorial Team before publication. Factual claims, formulas, and examples are independently checked against primary sources by the Quality Review Team. We do not publish AI-generated content without human review.

Corrections policy

If you believe a calculator or article contains an error, please tell us via our contact page. We take accuracy seriously and will review and correct confirmed issues promptly, typically within 5 business days. Significant corrections are noted on the relevant page with a correction date.

Independence and advertising

Our calculators are free to use and may be supported by advertising. Advertising never influences the results a calculator produces or the methodology behind it. Any advertising is clearly distinguishable from our editorial content. See our disclaimer for the limits of the information we provide.

Not professional advice

Our content is for general information and education only and is not financial, tax, legal or investment advice. For significant decisions, consult a qualified professional — a CPA, licensed financial adviser, or qualified business appraiser as appropriate.