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?

Yes — Amazon storing your FBA inventory in a Idaho fulfillment center generally creates physical nexus regardless of sales volume. Pull your Amazon Inventory Event Detail report and look for ID fulfillment-center activity; if present, Idaho typically expects registration even when Amazon already collects sales tax on the facilitated orders.

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 2026-04-27

If your Amazon business sells $100,000 into Idaho in a calendar year, you have economic nexus and must register, collect, and remit Idaho sales tax.

Amazon FBA and sales tax in Idaho

Amazon is a marketplace facilitator in Idaho, which means Amazon calculates, collects, and remits sales tax on your FBA and MFN sales to Idaho buyers. You don't collect tax on those transactions yourself.

However, if Amazon stores your FBA inventory in a Idaho warehouse, you may have physical nexus — independent of the economic threshold. Some states will ask you to register anyway for information reporting.

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

Economic nexus in Idaho triggers at $100,000 in gross sales delivered into Idaho in the current or prior calendar year. No transaction count threshold.

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.

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?: Yes — Amazon storing your FBA inventory in a Idaho fulfillment center generally creates physical nexus regardless of sales volume. Pull your Amazon Inventory Event Detail report and look for ID fulfillment-center activity; if present, Idaho typically expects registration even when Amazon already collects sales tax on the facilitated orders.
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: 2026-04-27