Sources

Every figure on PaycheckGrid traces back to an official source. The table below lists each dataset we use, the IRS, SSA, or state revenue department page it comes from, and the date we last verified it.

If a number on the site ever looks off, this is where to check it first. Spotted a discrepancy against a source? Email support@inventum.com.au and we will review it.

Federal datasets

DatasetSourceStatusVerified
bracketsIRS Rev. Proc. 2025-32 (tax year 2026 rate tables, all four filing statuses)verifiedJuly 16, 2026
standard deductionIRS IR-2025-103 (tax year 2026 inflation adjustments)verifiedJuly 16, 2026
ficaIRS Topic No. 751 — Social Security and Medicare withholding ratesverifiedJuly 11, 2026
ss wage baseSSA — Contribution and Benefit BaseverifiedJuly 17, 2026
supplementalIRS Publication 15 — supplemental wage withholding (22% flat / 37% over $1M)verifiedJuly 11, 2026
withholding methodsIRS Publication 15-T (2026) — reference for the batch-3 per-paycheck toggle; not used by the shipped annual-liability methodverifiedJuly 11, 2026

State datasets (2026)

JurisdictionOfficial sourcePayroll leviesStatusVerified
AlabamaAlabama Department of Revenue - Form 40 (rates, exemptions, federal tax deduction) and Standard Deduction Chart—verifiedJuly 16, 2026
AlaskaAlaska Department of Labor - Employment Security Tax (2026 rates)Alaska Unemployment Insurance (employee contribution)verifiedJuly 16, 2026
ArizonaArizona Department of Revenue—cross-checkedJuly 16, 2026
ArkansasArkansas Department of Finance and Administration—cross-checkedJuly 16, 2026
CaliforniaCalifornia Franchise Tax Board / EDDCA SDIverifiedJuly 16, 2026
ColoradoColorado Department of Revenue / Colorado FAMLI DivisionCO FAMLI (employee share)verifiedJuly 17, 2026
ConnecticutConnecticut DRS / CT General Assembly OLRCT Paid Leave (employee)verifiedJuly 16, 2026
DelawareDelaware Division of RevenueDelaware Paid Leave (employee share)verifiedJuly 16, 2026
District of ColumbiaDC Office of Tax and Revenue—verifiedJuly 16, 2026
FloridaFlorida Department of Revenue—verifiedJuly 16, 2026
GeorgiaGeorgia Department of Revenue - Important Tax Updates / 2026 Employer's Withholding Tax Guide—verifiedJuly 16, 2026
HawaiiHawaii Department of TaxationHawaii TDI (employee share)cross-checkedJuly 16, 2026
IdahoIdaho State Tax Commission—cross-checkedJuly 16, 2026
IllinoisIllinois Department of Revenue—verifiedJuly 16, 2026
IndianaIndiana Department of Revenue—verifiedJuly 16, 2026
IowaIowa Department of Revenue—verifiedJuly 16, 2026
KansasKansas Department of Revenue—cross-checkedJuly 16, 2026
KentuckyKentucky Department of Revenue—verifiedJuly 16, 2026
LouisianaLouisiana Department of Revenue—cross-checkedJuly 16, 2026
MaineMaine Revenue ServicesMaine PFML (employee share)verifiedJuly 16, 2026
MarylandComptroller of Maryland—verifiedJuly 16, 2026
MassachusettsMassachusetts Department of RevenueMA PFML (employee)verifiedJuly 16, 2026
MichiganMichigan Department of Treasury—verifiedJuly 16, 2026
MinnesotaMinnesota Department of RevenueMinnesota Paid Leave (employee share)verifiedJuly 16, 2026
MississippiMississippi Department of Revenue - Individual Income Tax General Information—verifiedJuly 16, 2026
MissouriMissouri Department of Revenue—verifiedJuly 16, 2026
MontanaMontana Department of Revenue—verifiedJuly 16, 2026
NebraskaNebraska Department of Revenue—cross-checkedJuly 16, 2026
NevadaNevada Department of Taxation—verifiedJuly 16, 2026
New HampshireNH Department of Revenue Administration - Repeal of NH Interest and Dividends Tax Now in Effect—verifiedJuly 16, 2026
New JerseyNew Jersey Division of Taxation / NJ Department of LaborNJ UI/WF/SWF (employee) · NJ TDI (employee) · NJ FLI (employee)verifiedJuly 16, 2026
New MexicoNew Mexico Taxation and Revenue Department—verifiedJuly 16, 2026
New YorkNew York State Department of Taxation and FinanceNY PFL (employee) · NY DBL (employee)cross-checkedJuly 16, 2026
North CarolinaNorth Carolina Department of Revenue - Tax Rate Schedules—verifiedJuly 16, 2026
North DakotaNorth Dakota Office of State Tax Commissioner—cross-checkedJuly 16, 2026
OhioOhio Department of Taxation—verifiedJuly 16, 2026
OklahomaOklahoma Tax Commission—cross-checkedJuly 16, 2026
OregonOregon Department of RevenuePaid Leave Oregon (employee share) · Oregon Statewide Transit Taxcross-checkedJuly 16, 2026
PennsylvaniaPennsylvania Department of Revenue / PA Dept of Labor & IndustryPA UC employee withholdingverifiedJuly 16, 2026
Rhode IslandRhode Island Division of TaxationRI TDI (employee)verifiedJuly 16, 2026
South CarolinaSouth Carolina Department of Revenue - Information about H.4216 (Act 110)—verifiedJuly 16, 2026
South DakotaSouth Dakota Department of Revenue—verifiedJuly 16, 2026
TennesseeTennessee Department of Revenue—verifiedJuly 16, 2026
TexasTexas Comptroller of Public Accounts—verifiedJuly 16, 2026
UtahUtah State Tax Commission—verifiedJuly 16, 2026
VermontVermont Department of Taxes—cross-checkedJuly 16, 2026
VirginiaVirginia Department of Taxation—verifiedJuly 16, 2026
WashingtonWA Employment Security Department / Paid Leave WAWA Paid Family & Medical Leave (employee share) · WA Cares Fund (long-term care, employee-paid)verifiedJuly 16, 2026
West VirginiaWest Virginia Tax Division—verifiedJuly 16, 2026
WisconsinWisconsin Department of Revenue—verifiedJuly 16, 2026
WyomingWyoming Department of Revenue—verifiedJuly 16, 2026

“Verified” = transcribed from the official government source. “Cross-checked” = the government host blocks automated access; figures confirmed against two or more independent professional sources and queued for a manual check of the official page. Site last verified July 17, 2026. Published by Inventum.