Essential Guide to Sales Tax in Idaho

Key Takeaways

• Sellers with physical or economic nexus in Idaho are required to collect and remit Idaho sales tax.
• Effective July 1, 2025, qualifying Idaho resident small sellers with $5,000 or less in annual sales may be exempt from collecting and remitting sales tax and may not need to hold a seller’s permit if all criteria are met.
• Marketplace facilitators must register and collect Idaho sales tax once their combined sales (their own plus third-party sellers) exceed $100,000 in Idaho.
• Certain local jurisdictions in Idaho may impose local option sales taxes, adding up to approximately 3% on top of the statewide rate.
• Sales tax filing frequencies are assigned based on projected tax liability, and all Idaho sales tax returns are due on the 20th of the month following the reporting period.

Do You Need to Collect and Remit Sales Tax in Idaho? 

Most businesses that sell tangible personal property or taxable services in Idaho are required to collect and remit sales tax. The Idaho State Tax Commission defines tangible personal property as anything you can feel, see, touch, weigh, or measure—excluding real property. Both in-state and out-of-state businesses that sell into Idaho can be subject to Idaho’s sales and use tax.

Idaho does provide certain exemptions, including exemptions for qualifying small sellers, nonprofit organizations, and specific categories of goods. The rules can be nuanced, and the Idaho State Tax Commission publishes detailed guidance outlining which individuals, organizations, and items qualify for exemption. Relying on official guidance—rather than guessing—is essential to staying compliant.

One area where Idaho differs from many other states is how it treats contractors. In many states, contractors can purchase materials tax-exempt for resale. Idaho takes a different approach. Contractors are considered the end users of materials purchased for their projects and must pay sales tax on taxable equipment, tools, and supplies. This “contractor tax” highlights an important reality of sales tax compliance: every state plays by its own rules, and Idaho is no exception.

Do You Have Sales Tax Nexus in Idaho? 

Sales tax nexus is the connection between a business and a state that creates a legal obligation to collect and remit sales tax. In Idaho, nexus can be established through physical presence or economic activity.

Physical Sales Tax Nexus

You have physical nexus in Idaho if your business:

• Owns property in Idaho
• Has an office, warehouse, salesroom, or employees in Idaho
• Has sales representatives or agents in Idaho
• Keeps goods in Idaho that will be sold, including inventory held by third-party fulfillment providers

If any of these apply, you are likely required to register for an Idaho seller’s permit and begin collecting.

Small Seller Exemption (Effective July 1, 2025)

One significant exclusion to physical nexus is Idaho’s new Small Seller Exemption, which became effective July 1, 2025 under House Bill 144.

To qualify, a seller must:

• Be an Idaho resident
• Operate as an individual or sole proprietor
• Have gross sales of $5,000 or less in both the current and previous calendar years
• Not operate through a corporation, partnership, or LLC
• Not have a fixed business location such as a storefront or warehouse

Sellers who meet all of these requirements are not required to apply for an Idaho seller’s permit and do not need to collect or remit sales tax. However, qualifying small sellers must still pay sales tax on their own purchases and should maintain accurate records, especially once sales approach or exceed $3,000.

If a seller does exceed the $5,000 threshold, they must obtain a permit within 30 days and begin collecting sales tax.

Economic Sales Tax Nexus

For businesses without physical presence in Idaho, economic nexus exists when:

• The seller is located outside Idaho, and
• The seller makes more than $100,000 in gross sales of tangible personal property to Idaho customers in the current or previous calendar year

This threshold includes sales made through online marketplaces and is the trigger for remote seller registration and sales tax collection obligations.

Are Marketplace Facilitators Required to Collect and Remit Sales Tax in Idaho? 

Yes. Marketplace facilitators must register with the Idaho State Tax Commission and collect, report, and pay Idaho sales and use tax on all taxable retail sales facilitated through their platform once the combined Idaho sales (their own sales plus third-party seller’s) exceeds $100,000.

This requirement applies regardless of whether the facilitator has a physical presence in Idaho, although compliance timing differs slightly if there is physical presence.

Common marketplace facilitators include:

• Amazon    
• eBay    
• Etsy    
• Walmart (online) 
• Shopify Shop App

This list is illustrative; the official law defines facilitators broadly.

Idaho Sales Tax Filing

Ready to get started collecting Idaho sales tax? Instead of getting lost in the weeds, follow this step-by-step guide to stay compliant.

When Are Idaho Sales Tax Returns Due?

When you register for an Idaho seller’s permit, the Tax Commission assigns a filing frequency based on your anticipated tax liability.

If a due date falls on a weekend or state holiday, the return is due the next business day.

Let us file for you!    

If Idaho sales tax filing is overwhelming or time-consuming, SalesTaxSolutions.US can help. We specialize in state-by-state compliance, helping businesses stay current with evolving tax laws so you can focus on running your business.

See our pricing options or call at 888-544-7730 today!