How TrueTaxRate estimates your total tax burden

What the estimate includes

The calculator starts with gross income and estimates taxes that can materially reduce household income over the year. When a user enters an actual tax amount from a W-2, return, property bill, or vehicle registration, TrueTaxRate uses that value instead of a broader estimate for that category.

• Federal income tax
• State and territory income tax
• Local income tax where modeled
• Payroll and self-employment taxes
• Sales and use tax estimates
• Property tax entered by the user
• Vehicle registration taxes or fees entered by the user
• Gas tax estimates based on driving inputs
• Capital gains taxes where supported

Core assumptions

Federal and state income tax estimates use current public bracket and adjustment data in the local tax engine. Payroll tax estimates distinguish W-2 wages from self-employment income where the user provides those inputs. Sales tax estimates use ZIP or state-average rates when exact purchase-level tax is not entered. Property and vehicle taxes are strongest when entered directly because local rules vary widely.

Data sources

TrueTaxRate relies on public tax and economic data sources, plus user-entered values. Source references vary by tax category and are also linked from individual articles.

• IRS tax brackets, payroll tax rates, self-employment tax guidance, and forms.
• State revenue departments and public state tax publications.
• Tax Foundation sales tax and state tax reference data.
• U.S. Census Bureau and Bureau of Economic Analysis datasets for context.
• Local ZIP-based tax data where available in the calculator.

Update cadence

The calculator data is reviewed when major federal or state tax updates are available and after product changes that affect a tax category. Article pages show their own last updated dates. If a source changes before the calculator is refreshed, results may lag the newest law or rate table.

Limitations

• It does not prepare or file tax returns.
• It does not model every credit, deduction, phaseout, surcharge, local rule, or business-specific tax.
• It does not calculate full cost of living, insurance, housing, healthcare, childcare, or salary changes.
• It treats user-entered actual tax amounts as stronger than estimates.
• Puerto Rico support is beta and depends heavily on residency and income-source assumptions.