What is the sales tax rate in Nampa?
The combined sales tax rate in Nampa, Idaho is 6% as of 2026. It is made up of the Idaho statewide base rate of 6%, plus applicable Canyon County and local district taxes. Nampa sits within Canyon County, and the rate can vary slightly across ZIP codes because of special district additions (see the ZIP breakdown below).
Sales tax in Idaho is administered by the Idaho State Tax Commission, which collects and distributes tax on behalf of the state and its local jurisdictions. The rate applies to most retail sales of tangible personal property delivered within Nampa.
Who needs to collect sales tax in Nampa, Idaho?
Any business with sales tax nexus in Idaho must register, collect, and remit sales tax on taxable sales delivered to Nampa. Nexus is established through:
- Physical presence: an office, store, warehouse, employee, or inventory located in Idaho.
- Economic nexus: exceeding $100,000 in sales to Idaho customers in the current or prior year.
- Marketplace facilitators: platforms such as Amazon or Etsy collect and remit on behalf of their third-party sellers.
Out-of-state (remote) sellers that cross Idaho's economic nexus threshold must register with the Idaho State Tax Commission before continuing to sell into the state.
How do you register for a sales tax permit in Nampa?
To collect sales tax in Nampa, you must register for a sales tax permit with the Idaho State Tax Commission. Registration is generally free. You will typically need your EIN or SSN, business entity details, bank account information, and an estimate of your monthly Idaho sales. Most permits are issued within a few business days of an online application.
How do you charge the right sales tax in Nampa?
Sales tax in Nampa is charged based on the delivery address. For orders shipped to a Nampa address, the combined rate of 6% generally applies; for in-store sales, the rate is based on the store's location. Because some ZIP codes within Canyon County carry additional special-district taxes, always confirm the exact rate for the specific delivery ZIP code. The tables below show the most common Nampa ZIP codes and how Nampa compares with other cities in Canyon County and across Idaho.
