All tax calculations on this site use official data from the IRS and state revenue departments. Below is a complete list of our data sources, verified for accuracy.
✓ Federal Income Tax 2026
Source: IRS Rev. Proc. 2025-XX
View Official Source →
Last verified: January 17, 2026
State & Territory Tax Sources
| State | Source |
|---|---|
| ✓ Alabama (AL) |
Alabama Dept of Revenue Official Source → |
| ✓ Alaska (AK) | No State Income Tax |
| ✓ American Samoa (AS) |
Am Samoa (Local 4%) Official Source → |
| ✓ Arizona (AZ) |
AZ Flat Tax 2.5% Official Source → |
| ✓ Arkansas (AR) |
Arkansas DFA Official Source → |
| ✓ California (CA) |
CA EDD Withholding Schedules 2026 Official Source → |
| ✓ Colorado (CO) |
CO Flat Tax 4.4% Official Source → |
| ✓ Connecticut (CT) |
Connecticut DRS Official Source → |
| ✓ Delaware (DE) |
Delaware Division of Revenue Official Source → |
| ✓ District Of Columbia (DC) |
DC Office of Tax and Revenue Official Source → |
| ✓ Federated States Of Micronesia (FM) |
FSM (Non-US) Official Source → |
| ✓ Florida (FL) | No State Income Tax |
| ✓ Georgia (GA) |
GA Flat Tax 5.29% Official Source → |
| ✓ Guam (GU) |
Guam DRT (Mirror Fed) Official Source → |
| ✓ Hawaii (HI) |
Hawaii Dept of Taxation Official Source → |
| ✓ Idaho (ID) |
Idaho State Tax Commission Official Source → |
| ✓ Illinois (IL) |
IL Flat Tax 4.95% Official Source → |
| ✓ Indiana (IN) |
IN Flat Tax 2.95% Official Source → |
| ✓ Iowa (IA) |
Iowa Dept of Revenue Official Source → |
| ✓ Kansas (KS) |
Kansas Dept of Revenue Official Source → |
| ✓ Kentucky (KY) |
KY Flat Tax 4% Official Source → |
| ✓ Louisiana (LA) |
Louisiana Dept of Revenue Official Source → |
| ✓ Maine (ME) |
Maine Revenue Services Official Source → |
| ✓ Marshall Islands (MH) |
Marshall Islands (Non-US) Official Source → |
| ✓ Maryland (MD) |
Comptroller of Maryland Official Source → |
| ✓ Massachusetts (MA) |
MA Flat Tax 5% Official Source → |
| ✓ Michigan (MI) |
MI Flat Tax 4.25% Official Source → |
| ✓ Minnesota (MN) |
Minnesota Dept of Revenue Official Source → |
| ✓ Mississippi (MS) |
Mississippi DOR Official Source → |
| ✓ Missouri (MO) |
Missouri DOR Official Source → |
| ✓ Montana (MT) |
Montana DOR Official Source → |
| ✓ Nebraska (NE) |
Nebraska DOR Official Source → |
| ✓ Nevada (NV) | No State Income Tax |
| ✓ New Hampshire (NH) |
NH No Wage Tax Official Source → |
| ✓ New Jersey (NJ) |
NJ Treasury 2026 Official Source → |
| ✓ New Mexico (NM) |
NM Taxation and Revenue Official Source → |
| ✓ New York (NY) |
NY DTF Tax Tables 2026 Official Source → |
| ✓ North Carolina (NC) |
NC Flat Tax 3.99% Official Source → |
| ✓ North Dakota (ND) |
North Dakota Tax Dept Official Source → |
| ✓ Northern Mariana Islands (MP) |
CNMI (Fed Rebate) Official Source → |
| ✓ Ohio (OH) |
OH Flat Tax 2.75% (2026) Official Source → |
| ✓ Oklahoma (OK) |
Oklahoma Tax Commission Official Source → |
| ✓ Oregon (OR) |
Oregon DOR Official Source → |
| ✓ Palau (PW) |
Palau (Non-US) Official Source → |
| ✓ Pennsylvania (PA) |
PA Flat Tax 3.07% Official Source → |
| ✓ Puerto Rico (PR) |
PR Dept of Treasury Official Source → |
| ✓ Rhode Island (RI) |
Rhode Island Tax Division Official Source → |
| ✓ South Carolina (SC) |
SC Dept of Revenue Official Source → |
| ✓ South Dakota (SD) | No State Income Tax |
| ✓ Tennessee (TN) | No State Income Tax |
| ✓ Texas (TX) | No State Income Tax |
| ✓ Utah (UT) |
UT Flat Tax 4.65% Official Source → |
| ✓ Vermont (VT) |
Vermont Dept of Taxes Official Source → |
| ✓ Virgin Islands (VI) |
USVI BIR (Mirror Fed) Official Source → |
| ✓ Virginia (VA) |
Virginia Dept of Taxation Official Source → |
| ✓ Washington (WA) | No State Income Tax |
| ✓ West Virginia (WV) |
West Virginia State Tax Official Source → |
| ✓ Wisconsin (WI) |
Wisconsin DOR Official Source → |
| ✓ Wyoming (WY) | No State Income Tax |
Tax data is reviewed and updated annually when new rates are published by the respective government agencies.
