Idaho Sales Tax Guide & Nexus Calculator (2026)
Idaho is a straightforward sales tax state for remote sellers: standard $100,000 threshold, 6% flat rate, and a relatively simple local tax structure. Digital goods including downloaded software are taxable. Idaho participates in SST, simplifying multi-state registration.
Quick Reference
Section titled “Quick Reference”| Criterion | Detail |
|---|---|
| State Rate | 6% |
| Economic Nexus Threshold | $100,000 gross sales (rolling 12 months) |
| Transaction Threshold | None |
| Digital Goods / SaaS | Taxable |
| Typical Filing Frequency | Quarterly |
| SST Member | Yes |
| Registration Portal | tax.idaho.gov |
Economic Nexus
Section titled “Economic Nexus”For informational purposes only · Not legal or tax advice · Consult a licensed tax professional · Rules as of 2026
Idaho’s economic nexus threshold is $100,000 in gross sales into Idaho in the prior or current calendar year. Once exceeded, registration and collection are required.
Marketplace-facilitated sales (Amazon, Etsy, eBay) count toward the threshold. Idaho eliminated its 200-transaction alternative threshold before 2025. Only the revenue threshold applies.
Tax Rate and Product Taxability
Section titled “Tax Rate and Product Taxability”Idaho’s state rate is 6%. Idaho does not allow cities or counties to impose local sales taxes. The 6% rate applies statewide — there are no local sales tax variations.
This is a significant simplification compared to states with complex local rate structures. One rate applies to all Idaho customers regardless of where they are located in the state.
Product Categories
Section titled “Product Categories”Taxable: Tangible personal property, digital goods (including software and downloads), most retail goods.
Exempt: Prescription drugs, groceries (food and food ingredients are exempt from Idaho sales tax), qualifying agricultural inputs, medical devices, and manufacturing equipment.
Grocery exemption: Idaho exempts most food items intended for home consumption. Prepared food (restaurant meals, deli items prepared for immediate consumption) remains taxable at 6%.
Digital Goods and SaaS
Section titled “Digital Goods and SaaS”Idaho taxes digital goods, including downloaded software and certain digital products. Idaho’s approach:
- Downloaded software — taxable as the sale of tangible personal property transferred electronically
- Prewritten (off-the-shelf) software delivered electronically — taxable
- SaaS — Idaho has generally held that true SaaS (where no copy is transferred and the customer only accesses the software remotely) may not be taxable as tangible personal property, but guidance is evolving. The line between taxable software delivery and non-taxable SaaS is not always clear in Idaho
- Digital content (music, ebooks, video downloads) — taxable when a permanent copy is delivered
- Streaming — less clear; Idaho has not issued specific comprehensive guidance on streaming services
For sellers with downloaded software products, Idaho creates a clear taxable obligation. For pure SaaS with no deliverable copy, verify current Tax Commission guidance for your specific delivery model.
Registration
Section titled “Registration”Idaho is an SST member state. You can register through the Streamlined Sales Tax Registration System (SSTRS) at streamlinedsalestax.org to cover Idaho alongside other SST states.
For Idaho-only registration:
- Go to the Idaho State Tax Commission portal: tax.idaho.gov
- Create an account and access the online registration
- Register for a Seller’s Permit
- Provide EIN, business type, and expected Idaho sales
- You will receive an Idaho Seller’s Permit number
Registration is free. No permit fee in Idaho.
Foreign Sellers
Section titled “Foreign Sellers”Idaho accepts foreign business registrations. A US EIN is required. Idaho does not require a registered agent or Idaho address for remote seller registration.
Filing Frequency and Deadlines
Section titled “Filing Frequency and Deadlines”Idaho assigns filing frequency based on prior-year Idaho sales tax liability:
| Annual Tax Liability | Filing Frequency |
|---|---|
| Less than $1,200 | Annual |
| $1,200–$12,000 | Quarterly |
| More than $12,000 | Monthly |
Quarterly due dates: Returns are due on the 20th of the month following the quarter end (April 20, July 20, October 20, January 20).
Returns are filed through the Idaho State Tax Commission portal. Zero returns are required in periods with no Idaho sales.
Compliance Notes
Section titled “Compliance Notes”No local rates: Idaho’s single statewide rate eliminates rate calculation complexity. No ZIP code lookups or rate tables needed — 6% applies everywhere.
SST membership: Idaho’s SST participation means multi-state registration is simpler. If you are registering in multiple states, use the SSTRS for Idaho.
Digital goods — confirm SaaS treatment: If your product is pure SaaS with no download component, review current Idaho Tax Commission guidance before assuming taxability. The position on SaaS is less settled than on downloaded software.
Grocery sellers: Idaho’s grocery exemption is meaningful. If you sell food items, ensure your platform correctly classifies them for the Idaho exemption.
Amazon FBA: Idaho has Amazon fulfillment centers. FBA inventory in Idaho creates physical nexus immediately — register without waiting for the $100,000 threshold if you have Idaho FBA inventory.
Manufacturing exemptions: If you sell machinery or inputs to Idaho manufacturers or agricultural operations, review exemption certificate requirements carefully.