March 5, 2026
Posted by: OTIN Editorial Team
Category: Sales Tax Registration

How to Register for a Sales Tax Permit in Indiana

What a Sales Tax Permit Is (and When You Need One in Indiana)

A sales tax permit (often called a Registered Retail Merchant Certificate in Indiana) authorizes a business to collect Indiana sales tax on taxable sales and remit it to the state. You generally need to register before making taxable retail sales in Indiana, including:

Selling taxable goods to Indiana customers in a storefront, at events, or via delivery
Selling taxable products online to Indiana buyers when you have an Indiana physical presence or exceed Indiana’s remote-seller threshold
Providing taxable services or transactions (when Indiana treats the sale as taxable)
Making taxable sales outside a collecting marketplace facilitator when your business otherwise has Indiana registration obligations

Common signs you should register now

You are opening a business location in Indiana
You are hiring employees or storing inventory in Indiana
You are a remote seller whose gross revenue from sales into Indiana exceeds $100,000 in the current or preceding calendar year
You are participating in temporary selling events (fairs, shows, pop-ups)

Indiana Snapshot: Rate, Major Cities, and Counties

State	State sales tax rate	5 major cities	5 major counties
Indiana (IN)	7%	Indianapolis, Fort Wayne, Evansville, South Bend, Carmel	Marion, Lake, Allen, Hamilton, St. Joseph

Information You’ll Need Before You Apply

Preparing your details in advance helps you complete the registration smoothly and avoid delays. Typical items include:

Business legal name and any DBA/assumed name
Entity type (sole proprietorship, LLC, corporation, partnership)
Federal EIN (the current Indiana BT-1 checklist identifies a federal ID number as required)
Business addresses (physical location, mailing address, additional locations)
Owner/officer information (names, titles, contact details)
Start date for taxable sales in Indiana
NAICS code or general description of products/services sold
Estimated sales volume and expected filing frequency (assigned by the state)

If you still need an EIN

If you have employees, operate as an LLC/corporation, or need an EIN for banking and vendor onboarding, you may want to review this related resource: Employer Identification Number (EIN) application details.

How to Register for an Indiana Sales Tax Permit (Step-by-Step)

Confirm your business structure and start date. Align your registration date with when you will begin making taxable sales.
Gather ownership and location details. Ensure names and addresses match your formation documents and banking records.
Complete Indiana’s business tax registration through INBiz. Provide your entity details, responsible parties, and business activities.
Select sales tax as a tax type. Indicate you will collect and remit sales tax on taxable transactions.
Review for accuracy and submit. Double-check legal names, FEIN/SSN, and addresses to prevent processing issues.
Retain confirmation and permit documentation. Save your registration confirmation and any certificate/permit information provided.

Multiple locations and additional registrations

Indiana requires registration for each business location. If you operate more than one Indiana location, sell at temporary events, or add new lines of business, update your registration as required and maintain location-specific records. Keep a list of all selling locations and the dates they became active.

After You Register: What Changes for Your Business

Registration is the starting point. Once you have an Indiana sales tax permit, you’re responsible for ongoing compliance tasks:

Collect sales tax correctly on taxable sales to Indiana customers
Maintain exemption documentation for non-taxed sales (such as resale or exempt entities)
File sales tax returns on time based on your assigned frequency
Remit tax collected by the due date
Keep books and records supporting sales, exemptions, and returns
Keep the account current so the RRMC can renew automatically without being held for missing returns or balances

Exemption certificates and resale sales

If you sell wholesale or accept exempt purchases, you should implement a process to collect and store exemption certificates before treating a transaction as non-taxable. Missing or incomplete documentation can convert an “exempt” sale into a taxable one during review.

Common Indiana Sales Tax Registration Mistakes to Avoid

Registering too late: collecting tax before you’re registered can create reporting and customer invoice issues.
Using mismatched legal names: inconsistencies between formation documents, EIN records, and registration can delay processing.
Forgetting additional locations: new stores, warehouses, and kiosks can change how you track sales and maintain records.
Not setting up a filing calendar: missed due dates can lead to penalties and interest.
Improperly handling exempt sales: failing to obtain exemption certificates at the time of sale is a frequent compliance gap.

If Your Indiana Business Sells Into Other States

If you sell into multiple states, you may need to register outside Indiana depending on your business footprint and sales activity in those states. If you’re expanding, compare processes and requirements state-by-state. For example, you can review California state sales tax online registration to see how another large state structures registration and onboarding.

FAQ: Registering for an Indiana Sales Tax Permit

1) What is Indiana’s sales tax permit called?

Indiana commonly refers to the sales tax permit as a Registered Retail Merchant Certificate (RRMC). It authorizes your business to collect and remit Indiana sales tax.

2) Do I need a sales tax permit before my first sale in Indiana?

Yes. If you will make taxable retail sales in Indiana, you should register before collecting sales tax from customers and before issuing invoices that include tax.

3) Do I need an EIN for Indiana’s business tax application?

Indiana’s current online BT-1 checklist identifies a federal ID number (FID/EIN) as required to complete the application. Obtain the EIN before beginning the registration if you do not already have one.

4) How long does it take to get an Indiana sales tax permit after applying?

Processing times vary based on application volume and whether your submission is complete. Accurate legal names, addresses, and taxpayer identifiers help prevent delays.

5) Do I need to register if I only sell online to Indiana customers?

If you have a physical presence in Indiana, you generally must register and collect tax on taxable Indiana sales. A remote seller without physical presence must register when gross revenue from sales into Indiana exceeds $100,000 in the current or preceding calendar year. Indiana no longer uses a 200-transaction threshold. Sales made only through a marketplace facilitator that collects and remits are treated differently.

6) What if I sell at a one-time craft fair or seasonal event in Indiana?

Temporary selling events can still involve taxable retail sales. Registering ahead of the event helps you collect tax properly and report sales under your permit.

7) How do I handle customers who claim they are tax-exempt?

Set a standard process to obtain a valid exemption certificate and keep it on file. Without proper documentation, you may be responsible for the tax if the sale is later treated as taxable.

8) Will Indiana assign my filing frequency?

Indiana assigns filing frequency based on factors such as your business type and expected sales activity. Once assigned, follow that schedule and maintain a compliance calendar.

9) What records should I keep after registering?

Maintain sales invoices, exemption certificates, returns filed, payment confirmations, and supporting documentation showing how tax was calculated and collected. Keep location-level records if you operate multiple sites.

10) If I stop selling, can I cancel or close my sales tax account?

Yes. If your business closes or you stop making taxable sales in Indiana, you should update your account status and file any final required returns to close out the obligation cleanly.