What is the sales tax rate in Caldwell?
The combined sales tax rate in Caldwell, 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. Caldwell 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 Caldwell.
Who needs to collect sales tax in Caldwell, Idaho?
Any business with sales tax nexus in Idaho must register, collect, and remit sales tax on taxable sales delivered to Caldwell. 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 Caldwell?
To collect sales tax in Caldwell, 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 Caldwell?
Sales tax in Caldwell is charged based on the delivery address. For orders shipped to a Caldwell 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 Caldwell ZIP codes and how Caldwell compares with other cities in Canyon County and across Idaho.
