Idaho Sales Tax and Invoicing Rules for 2026

TL;DR: Idaho charges a 6% state sales tax with a small resort city tax in some tourist areas pushing combined rates to 9%. Remote sellers exceeding $100,000 in sales must collect. Groceries are taxable at the full rate, and Idaho does not allow most local sales taxes.

Idaho keeps sales tax compliance relatively simple with a uniform statewide rate and no general local taxes, though resort cities are an exception. One notable feature is that groceries are fully taxable at the standard rate, offset by an income tax credit. This guide covers Idaho's rates, nexus rules, invoice requirements, exemptions, filing deadlines, and penalties for 2026.

State sales tax rate

Idaho imposes a 6% state sales and use tax on the retail sale of tangible personal property and certain services. Idaho generally does not allow cities or counties to impose their own general sales taxes, keeping compliance simple for most of the state. However, designated resort cities (such as Sun Valley, McCall, Ketchum, and Sandpoint) can levy an additional non-property tax of up to 3% on sales within their boundaries, bringing combined rates to up to 9% in those specific tourist areas.

For the vast majority of Idaho locations, the rate is a flat 6%, making Idaho one of the simpler states for sales tax compliance outside of the resort city exceptions.

Nexus rules

Physical nexus exists if you maintain a business location, warehouse, employees, inventory, or agents in Idaho. Storing goods in Idaho fulfillment centers creates nexus as well.

Economic nexus applies to remote sellers with $100,000 or more in gross sales into Idaho during the current or previous calendar year. There is no separate transaction count threshold. Marketplace facilitators must collect and remit on behalf of their third-party sellers once the facilitator meets the threshold. Idaho is not a member of the Streamlined Sales Tax Agreement, so sellers must register directly with the Idaho State Tax Commission.

What must appear on invoices

The Idaho State Tax Commission expects sales records to include:

• Seller's name, address, and Idaho seller's permit number
• Buyer's name and address
• Date of sale
• Description of goods or services sold
• Quantity and sale price of each item
• Sales tax shown as a separate line item
• Applicable tax rate (6% standard, or the resort city rate if applicable)
• Total amount due including tax
• Resale or exemption certificate number for exempt sales

Idaho requires that tax be collected on each separate sale and reflected in the seller's records for audit purposes. Sellers in resort cities should clearly indicate the additional local tax on invoices.

Exemptions and special cases

Idaho provides the following exemptions:

• Prescription drugs and certain medical equipment
• Sales to federal and Idaho state government agencies
• Agricultural equipment and supplies used in commercial farming and ranching
• Manufacturing equipment used directly in production processes
• Motor fuels (subject to a separate fuel excise tax)
• Occasional sales by individuals not regularly engaged in business (garage sales, etc.)
• Production exemption for items that become ingredients or components of a product being manufactured for sale

Notably, groceries are fully taxable at 6% in Idaho, making it one of a handful of states that tax unprepared food at the full rate. Idaho provides a grocery tax credit on the state income tax return (currently $120 per person) to partially offset this burden. Clothing is taxable. Idaho taxes limited services -- primarily those involving fabrication, installation, or repair of tangible property. Digital products delivered electronically are generally not taxable in Idaho, and SaaS is not currently taxed.

Filing frequency and deadlines

New businesses typically file monthly for the first year regardless of liability level. Idaho requires electronic filing through the Idaho State Tax Commission's TAP portal. There is no vendor discount for timely filing. Returns must be filed for all periods even when no tax is collected.

Penalties for non-compliance

A penalty of 0.5% per month of unpaid tax applies for late payment, up to a maximum of 25%. A separate penalty of 5% of the tax due (minimum $10) applies for late filing of the return. Interest accrues at the rate published annually by the Tax Commission (typically the federal rate plus 2%). Conducting business without a valid seller's permit can result in a $25 per day penalty. Idaho can also assess estimated taxes if returns are not filed.

Frequently asked questions

Are groceries taxable in Idaho? Yes. Idaho taxes unprepared food at the full 6% rate. To offset this burden, Idaho provides a grocery tax credit on the state income tax return, currently set at $120 per person (with higher amounts for seniors). The tax is still collected at the point of sale and must appear on invoices.

Does Idaho tax SaaS or digital products? Generally no. Idaho does not tax digital products delivered electronically or SaaS subscriptions. Prewritten software sold on tangible media (like a disc) is taxable, but electronic delivery of software, streaming services, and cloud-based products are exempt from Idaho sales tax.

Does Idaho have a sales tax holiday? No. Idaho does not offer any sales tax holiday or temporary exemption period. The state has not introduced legislation for a sales tax holiday as of 2026.

Are shipping charges taxable in Idaho? It depends. If the shipping charge is separately stated on the invoice, it is generally exempt from Idaho sales tax. If shipping is bundled into the product price, the entire amount becomes taxable. Sellers should separately state shipping charges on invoices to avoid collecting unnecessary tax on delivery costs.