Methodology

TaxGrader is a tax education platform. This page explains how we research, write, and review the content on the site, how our calculators work, and how we present state comparisons. Specific data sources are cited inline on each guide, state page, and calculator where the underlying claim is made.

Editorial Process

Research and drafting are AI-assisted. Every guide, glossary entry, and state page is then reviewed by the TaxGrader editorial team for accuracy, qualifying language, proper disclaimers, and inline source attribution before publication. We update content when underlying data or methodology changes.

Calculator Methodology

Our tax calculators apply the standard progressive tax formula using the published federal brackets, deduction amounts, and rate schedules for the tax year shown in the calculator. Calculators are designed to provide reasonable estimates for typical tax situations. They do not account for all possible credits, phase-outs, alternative minimum tax, or state-specific rules. The bracket data and any other inputs are cited inline on the calculator page.

How Rankings and Comparisons Work

When we rank or compare states, we sort by a single, clearly labeled metric so readers can evaluate the comparison directly. Common metrics include:

• Income tax burden: top marginal state income tax rate, or average effective rate where applicable
• Sales tax burden: combined state and average local sales tax rate
• Property tax burden: average effective property tax rate

Every comparison shows the specific metric used. We do not combine metrics into a single composite score, so there are no hidden weights, normalization steps, or tier cutoffs.

Update Cadence

• Federal brackets and standard deductions: updated annually when the IRS publishes new Revenue Procedures (typically October or November)
• State tax rates: updated annually as state legislatures pass changes
• Economic context data: refreshed quarterly
• Editorial content: reviewed when underlying tax law changes occur

Limitations

TaxGrader content is educational, not tax advice. Our calculators and comparisons are general-purpose tools and do not factor in individual circumstances such as filing status combinations, state-specific credits, retirement account interactions, alternative minimum tax, phase-outs, or audit risk. Always consult a qualified tax professional for advice specific to your situation.

Editorial Team and Corrections

More information about our editorial standards is on the editorial guidelines page. If you find an error in our content, please reach out via the contact page. We take accuracy seriously and will correct verified errors promptly.