If your business sells into Connecticut, you may be required to register with the Connecticut Department of Revenue Services (DRS), collect tax on taxable sales and file returns on an assigned schedule. This page covers who needs to register, what the Connecticut rules actually require, and how to start.
You can begin a Connecticut sales tax registration now, or read on first.
Understanding Connecticut Sales Tax Requirements
Connecticut administers its tax through the Connecticut Department of Revenue Services (DRS). Registered businesses receive a Sales and Use Tax Permit, which authorises collection and creates an ongoing filing obligation. The combined rate is 6.35%, and current figures are listed in the Connecticut tax rate table.
Who Needs to Register
- Businesses with a physical presence in Connecticut — an office, store, warehouse, stored inventory, employees or contractors
- Remote sellers exceeding the economic nexus threshold: $100,000 in gross receipts from retail sales into Connecticut and 200 or more retail sales, measured over the 12-month period ending September 30
- Businesses attending trade shows or selling temporarily in Connecticut
- Sellers using fulfilment services that store inventory in Connecticut
- Businesses buying for resale that need to issue exemption documentation
What Makes Connecticut Different
Connecticut is one of the few states applying an AND test. Both the $100,000 figure and the 200-sale count must be met before economic nexus exists, which makes it harder to trigger than most states. Connecticut also requires permit renewal, so the registration is not a one-time event.
Step-by-Step Registration Process
- Confirm the obligation. Establish whether you have physical presence or have crossed the economic threshold. Our economic nexus thresholds by state table lists the current Connecticut rule alongside every other jurisdiction.
- Gather your details. Legal and trade name, entity type, federal EIN, business and mailing addresses, owner or officer information, the date activity began, a description of what you sell, and bank details where required.
- Submit the application. Complete the registration for Connecticut and any other states you need at the same time.
- Receive your Sales and Use Tax Permit. Processing time varies; some states issue within days, others take several weeks.
- Begin collecting. Charge tax on taxable sales from the date collection is required.
- File on schedule. Returns are due monthly, quarterly or annually depending on the frequency assigned, and most periods require a return even with no sales.
Start your Connecticut sales tax registration.
Connecticut-Specific Considerations
Connecticut charges a fee for the Sales and Use Tax Permit and issues it for a fixed term, after which it must be renewed. Marketplace sales count toward the threshold measurement.
Detailed procedural information is in the state sales and use tax directory, and rates are listed in the Connecticut tax rate table. For the authoritative rule, see Connecticut DRS — Registering with DRS.
Compliance Best Practices
- Track your Connecticut sales separately so you can evidence the threshold calculation if asked
- Keep marketplace and direct sales in separate records — they are treated differently by different states
- File on time even in periods with no sales; a missed zero return carries the same penalty as a missed return with tax due
- Retain exemption and resale certificates for the period your state requires
- Watch for changes to your assigned filing frequency, which Connecticut can reassign as your volume changes
- Re-check your position across all states periodically, not just once at registration
If you would rather have deadlines, renewals, filing frequencies and threshold activity tracked for you, see sales tax compliance monitoring.
Frequently Asked Questions
Do I need to register in Connecticut if I only sell online?
Possibly. Selling remotely into Connecticut creates an obligation once you exceed $100,000 in gross receipts from retail sales into Connecticut and 200 or more retail sales, measured over the 12-month period ending September 30. Physical presence such as stored inventory can create one at any volume.
How long does Connecticut registration take?
Processing times vary by state and by workload, ranging from a few days to several weeks. Applying before you cross the threshold avoids a gap where you should be collecting but cannot.
What if a marketplace already collects the tax?
The marketplace handling collection does not necessarily remove your own registration obligation, and in Connecticut marketplace sales count toward the threshold measurement. See marketplace facilitator laws and sales tax nexus.
Do I still file if I had no sales?
In most cases yes. Once an account is open, returns are generally due on the assigned schedule regardless of activity.
Can I register in several states at once?
Yes. A single application can cover multiple states rather than approaching each separately.
SalesTaxApplication.net is a private filing service and is not a government agency. State agencies may allow businesses to handle these registrations directly. Rules vary and change — confirm current requirements with the Connecticut Department of Revenue Services (DRS) or a qualified professional before acting.