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. 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, TikTok Shop) collect and remit Indiana tax on your marketplace sales. How Indiana treats them:

Who collects?Facilitatoron marketplace orders; you collect on Shopify / 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 collectShopify, 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.

Does SalesTax50 file Indiana returns automatically?

Yes — AutoFile prepares your ST-103 from imported sales; you approve every return before it is submitted, and a $99 one-time state setup configures your existing Indiana permit.

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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