2026 official-source estimate
Estimate 2026 Indiana state withholding and county income tax from Form WH-4 exemptions and the January 1 county rule.
Quick answer
Indiana: Estimate 2026 Indiana state withholding and county income tax from Form WH-4 exemptions and the January 1 county rule. This 2026 calculator combines that state treatment with federal withholding and FICA, while showing supported employee-paid programs and known exclusions explicitly.
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Replace them with your own paycheck information. WageFrame did not read or save personal wage data.
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Included
Limitations
Enter gross pay for one pay period, federal W-4 adjustments, and the state details shown above. Federal withholding follows Publication 15-T. Indiana subtracts the pay-period constants for WH-4 personal, qualifying-dependent, first-time-dependent, and adopted-child exemptions, then applies the 2.95% state rate and the selected 2026 county rate to the same taxable wages. WH-4 additional state and county amounts remain separate.
Example: County withholding follows the Indiana residence county on January 1. An employee who lived out of state uses the principal Indiana work county on January 1; an unresolved basis remains a partial estimate. The calculator does not assume any unentered benefit deduction or invent a tax result.
Weekly, biweekly, semimonthly, and monthly are the supported paycheck frequencies. “Annual salary” is an earnings input and the annual view is a simple period multiplication; neither is an annual payroll-period method. The special Form W-4 adjustment for nonresident aliens is not modeled.
Which Indiana county rate applies? Use the Indiana county where the employee lived on January 1. If the employee lived out of state, use the principal Indiana work county on January 1. A later move does not change that withholding basis for the year.
State paycheck questions
Federal withholding follows Publication 15-T. Indiana subtracts the pay-period constants for WH-4 personal, qualifying-dependent, first-time-dependent, and adopted-child exemptions, then applies the 2.95% state rate and the selected 2026 county rate to the same taxable wages. WH-4 additional state and county amounts remain separate.
Included in this estimate: Federal income tax withholding; Social Security and Medicare; Indiana state withholding at 2.95%; All 92 county income tax rates effective January 1, 2026; Form WH-4 Lines 5 through 10.
Not included in this estimate: Interstate reciprocity and nonresident 30-day exceptions; Midyear county moves that do not change the January 1 withholding basis; Nonperiodic and supplemental wage rules; Unentered employer benefits and unsupported deduction treatments.
Source trail
Each rule is versioned and reviewed before production use.
See every checksum and effective date on the tax data sources page.