Sales Tax Registration in Connecticut: Cost, Steps & How to File
Sales Tax Registration in Connecticut sits at the intersection of state, county, and city rules — which is why nobody hands you a single checklist. Below: who issues it in Connecticut, then the general process, with the numbers you should confirm at the source rather than take on faith.
What we verified for Connecticut
Every figure in this box was found on the page linked underneath it, by machine, on 9 August 2026 — we publish no number we could not locate on the government page we cite. It is the part of this page that is actually about Connecticut; the process, documents and ranges further down are the national pattern.
- Issuing office
- Connecticut Department of Revenue Services (DRS)
- Fee
- $100
Source
- Sales and Use Tax Information — Connecticut DRS: https://portal.ct.gov/drs/sales-tax/tax-information (checked 9 August 2026)
Who issues a Sales Tax Registration in Connecticut
In Connecticut, a sales tax registration is issued by the office below. That is the office to confirm every figure with.
- Connecticut — the state revenue or taxation department (handles state tax registration and permits)
https://portal.ct.gov/drs
Starting point for anything else in Connecticut: the state business portal, https://business.ct.gov. It is a starting point, not the issuer of this permit.
The general US process
This sequence is the shape the process takes across the US. It is not a list of Connecticut requirements, and no step here should be read as one — the issuing office named above sets the actual requirements.
- Step 1: Work out whether you have nexus in the state — physical presence, staff, inventory, or sales above the threshold the state sets for remote sellers.
- Step 2: Register with the state revenue department. Registration is free in most states.
- Step 3: Collect the permit number the state issues, and keep it — the reseller permit is built on it.
- Step 4: Note the filing frequency the state assigns you. It is based on expected volume, not on your preference.
- Step 5: Charge the rate the state's sourcing rules point at. Many states tax at the buyer's address rather than the seller's.
- Step 6: File on schedule even in periods with no sales where the state requires a zero return.
What varies: whether the state has a sales tax at all (five do not), the economic nexus threshold, the sourcing rule, and the filing calendar.
Documents usually asked for
A typical list, not a Connecticut checklist.
- EIN
- Business address
- NAICS code
- Expected monthly taxable sales estimate
Related permits in Connecticut
Sales Tax Registration in states bordering Connecticut
Rules stop at the state line — same permit, each state bordering Connecticut:
See Sales Tax Registration in all 50 states & DC →
Frequently asked questions
Who issues a sales tax registration in Connecticut?
Connecticut Department of Revenue Services (DRS). The state office named at the top of this page.
How much does a sales tax registration cost in Connecticut?
The Connecticut figure is $100. That was found on the government page linked at the top of this page, not written by us. For comparison, the typical US range is $0–$100.
How long does it take to get a sales tax registration in Connecticut?
Typical US processing is Same-day–14 days, and expedited handling is often available for a fee. The issuing office publishes its own turnaround, and that is the number to trust.
What is Connecticut-specific on this page: the issuing office, every figure in the verified Connecticut box, each one located on the government page it cites. Everything else — the numbered process, the document list, the cost and timeline — is the general US pattern, not a Connecticut rule, and is labelled that way above. Requirements, fees and deadlines are set by the issuing office; confirm with it before you file or pay.