The Tippecanoe County income tax rate for 2026 is 1.28% of your Indiana adjusted gross income.1Indiana Department of Revenue. How to Compute Withholding for State and County Income Tax That sits on top of Indiana’s flat state rate of 2.95%, for a combined individual income tax of 4.23%.2Indiana Department of Revenue. Rates, Fees and Penalties The 1.28% figure is an increase from the 1.1% that applied in prior years, so pay stubs and estimated payments both need a fresh look.
Who Pays the Tippecanoe Rate
Indiana pins your county rate to a single day. Whichever county you lived in on January 1 sets your rate for the entire calendar year.3Indiana General Assembly. Indiana Code Title 6 Article 3.6 Chapter 8 Section 6-3.6-8-3 – County Residency and Place of Business Move out of Tippecanoe County on January 2 and you still owe the Tippecanoe rate through December. The new county’s rate does not take effect until the following January 1. This is the point where mid-year movers most often miscalculate.
If you live in Tippecanoe County but work in another Indiana county, your home county still controls, so you pay Tippecanoe’s rate. The reverse is true for out-of-state workers: if your principal place of employment on January 1 is inside Tippecanoe County, the county rate applies to your Indiana-source wages even though you live elsewhere.1Indiana Department of Revenue. How to Compute Withholding for State and County Income Tax
How the Tax Gets Withheld and Filed
For wage earners, the county tax comes out automatically through payroll. When you start a job, you complete Form WH-4, the Employee’s Withholding Exemption and County Status Certificate, listing your county of residence and your county of principal employment as of January 1.4Indiana Department of Revenue. Withholding Tax Forms Your employer uses that information to withhold at the correct rate. File a new WH-4 at the start of any year in which either county has changed, and check an early-year pay stub to confirm the 1.28% rate is being applied.
You reconcile everything on your annual Indiana return. Full-year residents file Form IT-40; part-year residents and nonresidents file Form IT-40PNR.5Indiana Department of Revenue. Current Year Individual Tax Forms Both forms require a county code so the Department of Revenue can route your county share to Tippecanoe. The state collects and distributes; you file one return covering both.
Payments, extensions, payment plans, and responses to department notices all run through the INTIME portal.6Indiana Department of Revenue. INTIME If you receive a letter from the department, the Letter ID printed on it lets you reply electronically through your INTIME account.
Estimated Payments if You’re Self-Employed
Income that no employer withholds from — freelance work, rental income, business profits — usually requires quarterly estimated payments covering both state and county tax. The rule: if you expect to owe $1,000 or more in combined state and county tax after any withholding, you have to make estimated payments.7Indiana Department of Revenue. Estimated Payments
The 2026 quarterly due dates are:
- April 15, 2026
- June 15, 2026
- September 15, 2026
- January 15, 2027
A due date that falls on a weekend or holiday moves to the next business day.7Indiana Department of Revenue. Estimated Payments Each installment is evaluated on its own, and underpaying any single quarter triggers a 10% penalty on that shortfall.2Indiana Department of Revenue. Rates, Fees and Penalties Splitting your projected liability evenly across the four dates is the cleanest way to stay ahead of it.
Deadlines and Penalties
The 2025 Indiana state and county return is due April 15, 2026. A late payment penalty of 10% of the unpaid tax, or $5, whichever is greater, applies to any balance not paid by that date, and interest runs on top of the penalty.2Indiana Department of Revenue. Rates, Fees and Penalties The safest guard against a surprise bill is to check early-year pay stubs for the 1.28% rate; if withholding is running short, submit a corrected WH-4 or make a supplemental estimated payment through INTIME.
Military Service Members
Active-duty military members who entered service as Indiana residents remain Indiana residents for tax purposes wherever they are stationed.8Indiana Department of Revenue. Income Tax Information Bulletin 27 Starting in 2024, Indiana exempts active-duty military wages from state income tax, and because the county tax rides on the same base, those wages are not subject to the Tippecanoe County rate either.
Nonresident service members stationed at a base in Tippecanoe County are not taxed by Indiana or the county on their military pay, which is not Indiana-source income. Civilian side income earned within the county is a different matter: it is Indiana-source, taxable, and reported on Form IT-40PNR.8Indiana Department of Revenue. Income Tax Information Bulletin 27