Moving From Indiana Tax Guide 2026: Flat Tax + County Taxes & Retirement Rules

Indiana's income tax system has two layers: a low state flat rate (among the lowest in the Midwest) plus a county income tax that varies significantly by county. Marion County (Indianapolis) imposes 2.02% on top of the 3.05% state rate — a total of 5.07% — while lower-income counties may charge only 0.5–1%. Indiana is a relatively tax-competitive state with moderate overall burden. This guide covers Indiana's full tax picture, county tax structure, retirement income treatment, and exit planning for residents considering a move.

Indiana State and County Tax Structure

Indiana's two-layer income tax system requires understanding both the state rate and your county's rate:

State Income Tax: Declining Flat Rate

Indiana's flat rate has been declining: 3.23% (2022) → 3.15% (2023) → 3.05% (2024) → 3.0% (2025, estimated) → 2.9% (2026, if revenue targets met). Indiana's goal is to reach 2.9% over time. At 3.05%, Indiana has one of the lower flat income tax rates in states that impose income tax — comparable to Arizona (2.5%), North Carolina (4.5%), and Michigan (4.25%).

County Income Tax: The Critical Addition

Every Indiana resident pays both the state rate AND their county of residence rate. County rates vary widely:

Marion County has the highest county rate at 2.02%, making Indianapolis residents pay approximately 5.07% combined — comparable to Ohio's effective rate. Moving from Marion County Indianapolis to Carmel (Hamilton County) saves 0.92% (county rate difference) without leaving Indiana.

Retirement Income: Limited Exemptions

Indiana's retirement income treatment is less favorable than some Midwestern neighbors: $2,000 deduction for retirement income age 62+ (very modest — only saves $61–$100 in state tax); military pensions fully exempt; some federal civil service pensions partially exempt (Archer/CSRS exemptions based on contributions); Social Security fully exempt. Retirees with large IRA or private pension income pay Indiana state + county tax on most of it (above the $2,000 deduction). Moving to Florida or Tennessee eliminates this burden.

Indiana Savings from Moving to Florida

For a Marion County (Indianapolis) resident at $100,000 income:

• Indiana state tax: $100,000 × 3.05% = $3,050
• Marion County tax: $100,000 × 2.02% = $2,020
• Total Indiana income tax: $5,070
• Florida income tax: $0
• Annual savings: $5,070

For a Hamilton County (Fishers) resident at $100,000: $3,050 + $1,100 = $4,150 Indiana total → $4,150 annual savings by moving to Florida. Indiana's relatively low rates mean the absolute savings are moderate compared to departing California or New York — but still meaningful over a career or retirement.

Indiana Residency Exit Rules

Indiana uses a standard domicile-based residency test:

Indiana Residency

Indiana defines a resident as someone domiciled in Indiana. There is no statutory day-count trap for most taxpayers. You are domiciled in Indiana if Indiana is your permanent home — where you intend to return and consider home base. To terminate Indiana residency: establish domicile elsewhere (driver's license, voter registration, update will/estate docs), and physically move. Indiana does not aggressively audit departing residents in the way New York or California might, given its lower tax rate.

County Tax After Departure

County income tax is based on your county of residence on January 1 of each tax year. If you move from Marion County to another state before January 1, you owe no Marion County tax for that year. If you move during the year, Marion County tax applies for the portion of the year you were a Marion County resident (prorated).

Indiana Property Tax Cap

Indiana's constitutional property tax caps (1% of assessed value for homesteads) are one of the state's tax advantages. If you own Indiana real estate after departure, your property tax obligations continue, but the 1% cap limits the maximum tax liability on investment property (homesteads lose the 1% cap if no longer owner-occupied — they move to the 2% other residential cap).