SOURCE REGISTER

Sources & data rules

We use primary U.S. government sources for core public datasets. We do not replace missing official values with guesses.

IRS — 2026

2026 standard deductions and federal marginal tax schedules used by the calculator.

IRS Publication 505

SSA — 2026

Employee Social Security and Medicare parameters used in the payroll estimate.

SSA 2026

U.S. Census Bureau

ACS provides geographic measures such as median household income and median gross rent. Location records will be published only after geography/year validation.

Census Data

BEA — 2024 RPP

Regional Price Parities compare price levels with the national level of 100. 2024 is the current release used here.

BEA RPP

Verified 2024 RPP highlights

Geography	All-items RPP	Meaning
California	110.7	10.7% above U.S. national price level
Hawaii	110.0	10.0% above
New Jersey	108.8	8.8% above
Arkansas	86.9	13.1% below
Mississippi	87.0	13.0% below
Iowa	87.8	12.2% below

BEA, 2024 RPP release. RPP is an index, not an individual household budget.