Indiana Income Tax Calculator – Built for Accuracy

Most online tax tools oversimplify Indiana’s IT-40 rules, leaving you with estimates that don’t match reality. Our calculator is designed to stay true to Indiana’s tax mechanics, giving you a clear, reliable picture of what you owe.

Need help beyond the numbers? Sargent CPA, LLC specializes in Indiana tax preparation and planning—get peace of mind knowing your return is done right.

Indiana Income Tax Calculator

Tax year: 2025 • State rate: 3.00% • County rates as of Jan 1, 2025 • For estimates only.

1) County of residence (as of Jan 1):

Your rate is based on your county of residence (or principal employment) on January 1.

2) Filing status Single Married filing jointly Married filing separately

If MFS, caps are halved (renter $1,500; property tax $1,250). You can claim a $1,000 spouse exemption only if spouse had zero federal AGI: Spouse had $0 federal AGI.

3) Your age:

Spouse age:

4) Federal Adjusted Gross Income (AGI):

Numbers only; commas are OK (e.g., 120,000).

Exemptions

Total dependents (all):

Qualifying child dependents (under 19, or Full‑Time student <24):

First‑time claimed qualifying children in 2025:

Additional exemption is $3,000 for each first‑time claimed qualifying child; otherwise $1,500 per qualifying child.

You are blind

Spouse is blind

Age‑65 exemptions are applied automatically based on the age bracket(s) you selected.

Deductions

Rent paid on Indiana principal residence:

Residence must be subject to Indiana property tax. (Caps applied in the background.)

Indiana property tax on principal residence:

Do not include amounts expensed on Schedules C/E/F. (Caps applied in the background.)

Private school / homeschool deduction — number of qualifying dependent children (× $1,000):

Enter the count of qualifying dependent children; we multiply by $1,000 automatically.

Taxable Social Security (Form 1040, line 6b):

Indiana subtracts this amount in full.

Health care sharing ministry payments:

Deductible for Indiana if you were a member ≥1 month in the year.

Payments Made

Tax withheld:

Estimated payments:

Credits

Indiana 529 contributions:

Credit is 20% of contributions, up to $1,500 ($750 MFS), nonrefundable.

Public K‑12 educator classroom supplies (up to $100)

Nonrefundable credit; Indiana public K‑12 only.

Federal EIC amount:

Indiana EIC = 10% of your federal EIC (refundable).

Results

Assumptions & Sources

State rate and county rates per Indiana DOR .

Private school/homeschool deduction: $1,000 per qualifying dependent with unreimbursed K‑12 expenses—see IN DOR https://www.in.gov/dor/files/ib107.pdfInformation Bulletin #107.
Social Security subtraction: Indiana excludes taxable Social Security included in federal AGI—see DOR “Deductions” list ().
Personal/age/blind exemptions & first‑time dependent rules—see DOR https://www.in.gov/dor/files/ib117.pdfInformation Bulletin #117 and Schedule IN‑DEP (e.g., https://www.taxformfinder.org/indiana/form-in-depForm IN‑DEP).
Indiana 529 credit: 20% up to $1,500 ($750 MFS), nonrefundable—see DOR .

This tool covers common items only and is for estimation. See the IT‑40 instructions for full rules.

Last updated: 2025‑10‑05

Disclaimer:
This calculator is provided for informational and educational purposes only. Results are estimates based on current Indiana tax rules and may not reflect your exact tax liability. Tax laws and rates change frequently, and special circumstances may apply.

This tool does not constitute legal, tax, or accounting advice. For personalized guidance, please consult a qualified tax professional. Use of this calculator is at your own risk.