What is the sales tax rate in Stamford?
The combined sales tax rate in Stamford, Connecticut is 6.35% as of 2026. It is made up of the Connecticut statewide base rate of 6.35%, plus applicable Western Connecticut Planning Region County and local district taxes. Stamford sits within Western Connecticut Planning Region County, and the rate can vary slightly across ZIP codes because of special district additions (see the ZIP breakdown below).
Sales tax in Connecticut is administered by the Connecticut Department of Revenue Services, 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 Stamford.
Who needs to collect sales tax in Stamford, Connecticut?
Any business with sales tax nexus in Connecticut must register, collect, and remit sales tax on taxable sales delivered to Stamford. Nexus is established through:
- Physical presence: an office, store, warehouse, employee, or inventory located in Connecticut.
- Economic nexus: exceeding $100,000 in sales to Connecticut 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 Connecticut's economic nexus threshold must register with the Connecticut Department of Revenue Services before continuing to sell into the state.
How do you register for a sales tax permit in Stamford?
To collect sales tax in Stamford, you must register for a sales tax permit with the Connecticut Department of Revenue Services. Registration is generally free. You will typically need your EIN or SSN, business entity details, bank account information, and an estimate of your monthly Connecticut sales. Most permits are issued within a few business days of an online application.
How do you charge the right sales tax in Stamford?
Sales tax in Stamford is charged based on the delivery address. For orders shipped to a Stamford address, the combined rate of 6.35% generally applies; for in-store sales, the rate is based on the store's location. Because some ZIP codes within Western Connecticut Planning Region County carry additional special-district taxes, always confirm the exact rate for the specific delivery ZIP code. The tables below show the most common Stamford ZIP codes and how Stamford compares with other cities in Western Connecticut Planning Region County and across Connecticut.
