Indiana Small Business Taxes: The Employer’s Complete 2023 Guide

Feli Oliveros

Although Indiana may not be the most obvious state to set up shop, the Hoosier State’s business-friendly environment makes it worth a second look for entrepreneurs. According to Forbes Advisor, Indiana is the best state to start a business in 2023—in part due to its low cost of living, abundant business funding programs, and thriving workforce. Meanwhile, Indiana’s low tax rates helped it earn the ninth spot in the Tax Foundation’s 2023 list of most tax-friendly states in the US. 

But before you start a new venture in Indiana, consider what taxes you’ll have to pay in the state. Keep reading to learn: 

What kind of business taxes do you pay in Indiana?

Factors like business structure, employer status, and annual revenue help determine what business taxes you’re responsible for, so there’s no one answer to this question. However, most small business owners in Indiana can expect to pay income tax, franchise tax, sales tax, employer taxes, and any relevant industry-related or local taxes. 

Indiana personal income tax

Sole proprietorships, partnerships, and limited liability companies (LLCs)—otherwise known as pass-through entities—pay business taxes through the owner’s personal income tax returns. In 2023, Indiana taxpayers are subject to a flat 3.15% income tax rate. 

How to pay

Individual tax returns for the state are due by April 15—the same deadline established by the Internal Revenue Service (IRS) for federal individual tax returns. 

Find individual tax forms Form IT-40 (for residents of the state) and Form IT-40PNR (for part-year residents and nonresidents) here

Use the appropriate address listed in your tax form’s instructions to mail your tax return to Indiana’s Department of Revenue (DOR), along with your enclosed payment if applicable. If you prefer to pay your taxes online, you can do so through the Indiana Taxpayer Information Management Engine (or INTIME, for short).  

In addition to each partner’s personal tax return, partnerships are required to file a separate return for the business itself (Form IT-65, found here) by the 15th day of the fourth month after the fiscal year ends. For those following the calendar year, this tax filing deadline falls on April 15. 

Similar to the individual tax returns, you’ll need to find the appropriate mailing address in the partnership return instruction booklet. Then, mail your partnership tax payments along with the tax return, or pay online through INTIME.

Indiana corporate income tax

Corporations that are incorporated or do business in Indiana must file and pay corporate income taxes to the DOR. Indiana’s corporate tax rate for the 2023 tax year is 4.9%.

How to pay

The tax forms and instructions for both C corporations (Form IT-20) and S corporations (Form IT-20S) can be found here

Indiana’s C corporation tax returns are due by the 15th day of the fifth month after the end of the fiscal year. This deadline falls on May 15 for calendar filers. C corporations can choose to file electronically or by mail using the appropriate address found in the Form IT-20 tax instructions. If your corporation makes over $1,000,000 in gross income during the fiscal year, you’ll need to file your return using certified Modernized e-File (MeF) software. 

On the other hand, S corporations must file their tax returns by the 15th day of the fourth month after the fiscal year ends (April 15 for calendar year filers). Companies can file online or by mail (using the appropriate address from the Form IT-20S instructions). 

All corporations that expect to pay over $2,500 in corporate taxes for the fiscal year are required to make quarterly estimated tax payments on April 20, June 20, September 20, and December 20. 

You have the option here to pay any estimated taxes via INTIME or by mail. If you choose to pay by mail, make sure to send Forms E-6 and IT-6 along with your tax payment to the address below:

Indiana Department of Revenue
Tax Administration
100 N. Senate Ave.
Indianapolis, IN 46204-2253

However, those with quarterly tax payments of over $5,000 must file and pay their business income taxes through INTIME.

Sales tax

Companies selling physical goods or taxable services must collect sales tax from their customers at the point of purchase and pay it to the DOR. Indiana’s sales tax in 2023 is 7%, with no additional local sales taxes levied by the state’s municipalities. 

How to pay

Before you can collect sales taxes, you must first apply for a Registered Retail Merchant Certificate (RRMC). Register your business online via INTIME or the INBiz website, or mail  Form BT-1 (found here) to the address below: 

Indiana Department of Revenue
Tax Administration Processing
PO Box 6197
Indianapolis, IN 46206-6197

When you receive your RRMC, the DOR will also let you know how often you’ll need to file and pay taxes. Most businesses follow a monthly filing schedule and can expect to file and pay taxes online via INTIME by the 20th of the month after the end of the company’s filing period. Note that you must still file a sales tax return even if you didn’t collect any taxes for the filing period. 

For more information on Indiana’s sales tax, visit the DOR website

Withholding tax

Indiana-based employers must withhold a portion of each employee’s wages and submit these withholding taxes to the state. The state withholding tax rate in 2023 is 3.15%.

How to pay

First, register your business online via INTIME or INBiz. Alternatively, you can use the same application form you used to register for a sales tax permit (Form BT-1). 

After registering, employers are assigned a withholding filing frequency based on their withholding tax liability from the previous year. New employers are assigned a filing frequency based on their estimated monthly wages. 

The due dates for each filing frequency are as follows:

  • Annual: January 31 of the following year
  • Quarterly: The last day of the month following the end of the quarter
  • Monthly: 30 days after the end of the monthly filing period
  • Early: 20 days after the end of the monthly filing period

No matter your filing frequency, all registered employers must file their monthly withholding tax returns (Form WH-1) via INTIME. 

Annual withholding tax reconciliation forms (Form WH-3) must be filed through INTIME by January 31, even if you didn’t have any employees or pay any wages during the fiscal year. 

For more details on Indiana’s withholding tax, visit the DOR website or read this guide on filing withholding taxes through INTIME. Additionally, you can find all withholding tax forms here

Indiana unemployment tax

Indiana also requires employers to pay state unemployment insurance (UI) taxes to cover unemployment benefits for eligible former workers. 

The state’s unemployment tax rate ranges from 0.5% to 7.4% on the first $9,500 of each employee’s wages. The tax rate for new employers is 2.5%. Note that the Indiana Department of Workforce Development (DWD) reassesses the tax rate for new employers after operating for 36 months. 

How to pay

New employers must register their business through the DWD’s Employer Self-Service portal during the first month it reports employee wages. Employers will use this same website to file quarterly tax reports and make any tax payments. These quarterly filings are due April 30, July 31, October 31, and January 31. 

To learn more about Indiana’s unemployment taxes, look over the DWD unemployment insurance employer handbook

Other industry-related and local taxes

Depending on the area your business is located in, you may find yourself paying other taxes in addition to those imposed by the state. 

For instance, some counties charge their own income tax, resulting in a combined state and local tax rate that ranges from 3.73% to 6.13%. Other municipalities may collect their own withholding or property taxes, or they might charge sales tax on certain items. 

On top of that, the state of Indiana imposes taxes on some industries or businesses with certain offerings. So companies selling cigarettes and tobacco products must pay additional taxes, as do those that sell gasoline or rent motor vehicles. Other industry-specific taxes to look out for include the following:

  • aircraft excise tax
  • alcoholic beverage tax
  • fireworks tax
  • innkeeper’s tax
  • riverboat wagering tax

To make sure you’re staying compliant with state and local tax regulations, speak with your accountant or tax advisor. 

Indiana tax breakdown by business type

Let’s take a look at the various Indiana state and federal tax obligations by business entity type. Note that pass-through entities pay federal income taxes through their owner’s or member’s personal income tax returns. 

Business typeState income taxesSales taxWithholding taxUnemployment taxFederal income taxes
C corporation Yes Yes, if applicableYes, if you hire employeesYes, if you hire employeesYes
S corporationYes Yes, if applicableYes, if you hire employeesYes, if you hire employeesYes (pass-through)
LLC with C corp electionYes Yes, if applicableYes, if you hire employeesYes, if you hire employeesYes
LLCYes Yes, if applicableYes, if you hire employeesYes, if you hire employeesYes (pass-through)
Partnership Yes Yes, if applicableYes, if you hire employeesYes, if you hire employeesYes (pass-through)
Sole proprietorshipYes Yes, if applicableYes, if you hire employeesYes, if you hire employeesYes, by way of individual income tax

File your Indiana small business taxes with Gusto

As you can see, state taxes are a big responsibility for small business owners in Indiana—and yet they’re just one piece of the puzzle that makes a successful business. But with the help of Gusto’s powerful HR and payroll software, you can stop stressing over taxes and dedicate more of your time to the tasks only you can do. Try our platform out for yourself and sign up for an account today. 

Feli Oliveros Feli Oliveros is a freelance finance and business writer with experience covering personal and small business finance. In 2015 she graduated from UCLA, where she earned her bachelor’s degree in English and minored in Anthropology.
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