Our Methodology

Every calculator on Arcanomy is built on publicly available data sources and documented formulas. We do not use proprietary models or black-box algorithms. When you use one of our tools, you can see exactly how your result was calculated and verify it yourself.

Data Sources

Tax calculators use official rates published by the IRS and state tax authorities. Mortgage and loan calculators use standard amortization formulas. Investment calculators use compound interest formulas with user-provided return assumptions. We cite specific sources on each calculator page.

Default Values

Where calculators use default values (such as average property tax rates or historical market returns), these are clearly labeled with their source and date. You can always override defaults with your own numbers for more accurate results.

Validation

We validate calculator outputs against known benchmarks and cross-reference with established financial tools. When tax law changes, we update affected calculators within 30 days and note the effective date prominently.

Limitations

Our calculators are educational estimation tools. They provide accurate approximations based on the inputs you provide, but they are not substitutes for professional financial advice, tax preparation software, or official government forms. Individual circumstances vary, and we always recommend consulting a qualified professional for significant financial decisions.