Indiana Sales Tax Guide for E-commerce Sellers

Rate structure

Indiana's state rate is 7%; the combined state + local rate ranges from 7% (flat). Sourcing: Destination.

COMPONENTRATENOTES

State rate7%INTIME general statewide rate

Local taxes7% (flat)No local sales tax — one flat 7% statewide.

ReturnST-103ST-103 (Sales and Use Tax Voucher)

Economic nexus threshold

You must register and collect once your Indiana sales reach $100,000, measured over the previous or current calendar year. There is no transaction-count threshold. 200-transaction test removed 2024-03-29. MKT: Marketplace sales excluded from the remote-seller threshold. Sales made through a marketplace facilitator do not count toward the remote seller's threshold — only your direct sales do.

Where you stand: SalesTax50 tests your imported sales against this exact rule and flags Indiana as Approaching or Exceeded on your Nexus page — check my nexus free →

Filing frequency

INTIME assigns a filing frequency at registration based on expected tax liability and adjusts it over time. Frequencies used in Indiana: Monthly · Annual.

Due dates

Returns are due on the 20th (monthly) or 30th of the month following the period. When the due date falls on a weekend or holiday it moves to the next business day.

Late filing: 10% of tax due (min $5), plus interest.

Marketplace facilitator rules

Since July 2019, marketplace facilitators (Amazon, eBay, Walmart, Etsy, TikTok Shop) collect and remit Indiana tax on your marketplace sales. How Indiana treats them:

Who collects?Facilitatoron marketplace orders; you collect on direct Shopify store orders (not TikTok / Facebook & Instagram orders routed through Shopify), WooCommerce, or your own site.

Count toward nexus?Noonly your direct sales are tested against the remote-seller threshold.

Do you still file?YesYes — a registered seller still files, even for periods where all sales were through marketplaces (a zero or marketplace-only return).

How reported?DeductionDeduction (exempt sales) if you are registered.

Direct salesYou collectdirect Shopify store orders, WooCommerce, your own site, invoices — you collect and remit on your return.

Important: Indiana DOR: remote sellers do not include marketplace sales in their $100,000 threshold.

Marketplace treatment changes state by state and year by year — SalesTax50 separates marketplace and direct sales automatically, but confirm with Indiana Dept. of Revenue when in doubt.

Filing portal & AutoFile

Indiana returns are filed through intime.dor.in.gov/eServices/_. Login verification: May require verification. SalesTax50 AutoFile prepares the ST-103 from your imported sales — you review and approve every return before it is submitted.

FAQ

Do I need a Indiana permit if I only sell on Amazon?

If you exceed the $100,000 threshold with your direct (non-marketplace) sales or have physical presence (including inventory in Indiana warehouses), yes — you must register even though Amazon collects for you.

What if I sell on Shopify and TikTok Shop?

TikTok Shop collects as a marketplace facilitator; Shopify does not. You collect on Shopify orders and report both streams on your INTIME return — SalesTax50 separates them automatically.

What about WooCommerce and Etsy?

Same split: Etsy collects as a marketplace facilitator; WooCommerce is your own store, so you collect on WooCommerce orders. Connect both and SalesTax50 keeps the marketplace and direct streams separate on your INTIME return.

Does SalesTax50 file Indiana returns automatically?

Yes — AutoFile prepares your ST-103 from imported sales; you approve every return before it is submitted, and setting up your existing Indiana permit is included at no extra charge.

This guide is general information for e-commerce sellers, not tax advice. Rates, thresholds and due dates change — confirm with Indiana Dept. of Revenue before relying on them.

Let AutoFile handle your Indiana returns

Prepared and checked for you — you approve before anything is filed.

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