What is the sales tax rate in Dover?
The combined sales tax rate in Dover, New Hampshire is 0% as of 2026. It is made up of the New Hampshire statewide base rate of 0%, plus applicable Strafford County and local district taxes. Dover sits within Strafford County, and the rate can vary slightly across ZIP codes because of special district additions (see the ZIP breakdown below).
Sales tax in New Hampshire is administered by the New Hampshire Department of Revenue Administration, 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 Dover.
Who needs to collect sales tax in Dover, New Hampshire?
Any business with sales tax nexus in New Hampshire must register, collect, and remit sales tax on taxable sales delivered to Dover. Nexus is established through:
- Physical presence: an office, store, warehouse, employee, or inventory located in New Hampshire.
- Economic nexus: exceeding in sales to New Hampshire 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 New Hampshire's economic nexus threshold must register with the New Hampshire Department of Revenue Administration before continuing to sell into the state.
How do you register for a sales tax permit in Dover?
To collect sales tax in Dover, you must register for a sales tax permit with the New Hampshire Department of Revenue Administration. Registration is generally free. You will typically need your EIN or SSN, business entity details, bank account information, and an estimate of your monthly New Hampshire sales. Most permits are issued within a few business days of an online application.
How do you charge the right sales tax in Dover?
Sales tax in Dover is charged based on the delivery address. For orders shipped to a Dover address, the combined rate of 0% generally applies; for in-store sales, the rate is based on the store's location. Because some ZIP codes within Strafford County carry additional special-district taxes, always confirm the exact rate for the specific delivery ZIP code. The tables below show the most common Dover ZIP codes and how Dover compares with other cities in Strafford County and across New Hampshire.
