How does Amazon FBA sales tax work in Idaho in 2026?

For 2026, Amazon collects and remits Idaho sales tax on your FBA and MFN orders as a marketplace facilitator. You are still responsible for any direct-to-consumer or Shopify sales into Idaho once those off-Amazon sales cross $100,000, and you may need Idaho registration if FBA inventory is stored in-state.

Does Amazon FBA inventory in Idaho create physical nexus?

Storing inventory in a state is the classic physical-presence trigger across US states, and it applies regardless of sales volume. Pull your Amazon Inventory Event Detail report and look for ID fulfillment-center activity. Whether Idaho then requires a registration when a marketplace facilitator already collects on all your Idaho orders is a per-state rule — some states want the registration for information reporting, others do not — so confirm Idaho's position with the Idaho Department of Revenue before you register or skip it.

Does Amazon collect Idaho sales tax on my FBA orders?

Yes — Amazon is a marketplace facilitator in Idaho and collects and remits Idaho sales tax on your FBA and MFN sales automatically.

Do I still need to register in Idaho as an FBA seller?

If Amazon stores your FBA inventory in Idaho, you may have physical nexus and need to register for informational filing. Check your Amazon inventory reports for ID distribution.

What about direct-to-consumer sales outside Amazon?

Those are your responsibility. If your Shopify store or website sells into Idaho above $100,000, you register independently.

Idaho Amazon FBA Sales Tax Guide — 2026

Updated 2026-08-16

Reviewed by Nexus by State research team using official state tax sources. Last reviewed 2026-08-16.

Guide content last reviewed: 2026-08-16

Amazon collecting Idaho sales tax on your FBA orders does not end your Idaho obligations. This guide separates the three that remain in 2026 — marketplace collection, your own registration duty, and the physical nexus that FBA inventory stored in Idaho can create.

Amazon FBA and sales tax in Idaho

As of July 2026, Amazon FBA sales tax in Idaho is three separate duties, not one: where Idaho has a marketplace facilitator law Amazon calculates, collects, and remits the tax on the orders it facilitates; FBA inventory Amazon stores in a Idaho fulfillment center can create physical nexus on its own; and you still register and file on your direct, non-Amazon sales into Idaho once they cross $100,000.

Idaho has a marketplace facilitator law, so Amazon calculates, collects, and remits Idaho sales tax on the FBA and MFN orders it facilitates for you. You do not collect tax on those transactions yourself.

Separately, if Amazon stores your FBA inventory in a Idaho warehouse, you may have physical nexus — independent of the economic threshold. Whether that alone obliges you to register when a facilitator already remits the tax is a per-state question; several states say yes for information reporting.

The trap is that you don’t choose where your units sit. Amazon’s Inventory Placement Service can distribute one shipment across fulfillment centers in dozens of states, and it can move stock between them without asking you — so FBA inventory can appear in Idaho even if you never shipped there yourself. To see whether you actually hold units in Idaho, pull the Inventory Event Detail report (Seller Central → Reports → Fulfillment) and filter for ID fulfillment-center codes; that report, not a guess, is what tells you whether Idaho physical nexus is in play.

Sources: Streamlined Sales Tax Governing Board (marketplace facilitator collection) and Amazon Seller Central — FBA inventory reports. date_retrieved: 2026-07-28. Whether Idaho requires a registration when a facilitator already remits is a per-state rule — confirm your position with the Idaho Department of Revenue before you register or skip it.

When you still need to file in Idaho

You sell direct-to-consumer from your own store outside Amazon (Shopify, your website) into Idaho.
You have inventory stored in a Idaho FBA center (check your Amazon Seller Central inventory reports by state).
You sell wholesale, dropship, or run retail trade shows in Idaho.
State requires an information return even for marketplace-only sales (rules vary).

Common Amazon-seller mistakes in Idaho

Assuming marketplace facilitator status covers everything — if Amazon stored your inventory in Idaho, some states still want a registration on file.
Double-collecting when you sell the same SKU via Amazon AND your own Shopify store. Amazon collects; Shopify collects. Both remit. The buyer pays tax twice. Audit your setup.
Reporting marketplace-facilitated sales on your Idaho sales tax return as taxable when they should be reported as marketplace-facilitated (non-taxable for you). State form boxes vary.

Idaho nexus note

Idaho sales/use tax nexus and economic nexus threshold: effective June 1, 2019, an out-of-state retailer without a physical presence in Idaho must collect Idaho sales tax once its combined Idaho sales exceed $100,000 in the current or previous calendar year. Idaho uses a sales-only threshold — no transaction-count test. The threshold counts all Idaho retail sales — taxable, exempt, wholesale, and sales facilitated through third-party marketplaces — and marketplace-facilitated sales still count toward a seller's own threshold even when the marketplace collects the tax. A marketplace facilitator without Idaho physical presence must register and collect once the combined total of its own sales plus the sales it facilitates for retailers exceeds $100,000. Idaho's state sales tax rate is 6%, with limited local resort-city and auditorium-district taxes. Idaho State Tax Commission source data last retrieved 2026-06-14.

What to do next

Read the full Idaho overview for thresholds, filing frequency, marketplace facilitator rules, and registration links. Use the nexus calculator to check whether you have crossed the threshold. For background on the post-Wayfair economic nexus framework, see the pillar guide.

Amazon sales tax in other states

Compare Idaho's amazon rules with nearby and similar states' amazon sales tax guides:

Frequently asked questions

How does Amazon FBA sales tax work in Idaho in 2026?: For 2026, Amazon collects and remits Idaho sales tax on your FBA and MFN orders as a marketplace facilitator. You are still responsible for any direct-to-consumer or Shopify sales into Idaho once those off-Amazon sales cross $100,000, and you may need Idaho registration if FBA inventory is stored in-state.
Does Amazon FBA inventory in Idaho create physical nexus?: Storing inventory in a state is the classic physical-presence trigger across US states, and it applies regardless of sales volume. Pull your Amazon Inventory Event Detail report and look for ID fulfillment-center activity. Whether Idaho then requires a registration when a marketplace facilitator already collects on all your Idaho orders is a per-state rule — some states want the registration for information reporting, others do not — so confirm Idaho's position with the Idaho Department of Revenue before you register or skip it.
Does Amazon collect Idaho sales tax on my FBA orders?: Yes — Amazon is a marketplace facilitator in Idaho and collects and remits Idaho sales tax on your FBA and MFN sales automatically.
Do I still need to register in Idaho as an FBA seller?: If Amazon stores your FBA inventory in Idaho, you may have physical nexus and need to register for informational filing. Check your Amazon inventory reports for ID distribution.
What about direct-to-consumer sales outside Amazon?: Those are your responsibility. If your Shopify store or website sells into Idaho above $100,000, you register independently.

Sources

date_retrieved: 2026-06-14