Connecticut Sales Tax Permit Cost (2026)
A sales-tax permit in Connecticut costs $100 (one-time). The highest sales-permit fee in the country at $100, one-time and non-refundable; it then auto-renews for free. You need it before you can legally collect sales tax.
Verified July 2026 from official sources. How we verify fees.
What it costs in Connecticut
- Registration fee: $100 (one-time)
- Renewal: Auto-renews free every 2 years
- Resale certificate: free / self-issued
- Also needed: an EIN (free from the IRS) and usually a registered business
How it works
You register through the Connecticut Department of Revenue, usually online, and receive your permit (often the same day). The highest sales-permit fee in the country at $100, one-time and non-refundable; it then auto-renews for free. A sales-tax permit is separate from forming the business itself — see our Connecticut LLC and DBA cost pages for those fees.
Frequently asked questions
How much is a sales tax permit in Connecticut?
$100 (one-time). The highest sales-permit fee in the country at $100, one-time and non-refundable; it then auto-renews for free.
Do I need a sales tax permit in Connecticut?
Yes, if you sell taxable goods or services in Connecticut — you must register before collecting any sales tax from customers.
Does a Connecticut sales tax permit expire?
Renewal: auto-renews free every 2 years.