Join the waitlist

Connecticut Sales Tax Calculator and Remote Seller Nexus Check (6.35%)

What does this come to under the current IRS rules?

Sales tax on a sale at the 6.35% statewide rate plus your local rate, and whether your sales into Connecticut pass the $100,000 and 200-transaction economic nexus threshold.

  • Runs in your browser
  • Nothing stored or sent
  • Free, no sign-up
Your figures
Example figuresIllustrative only. Type over them with your own.
Sales tax due
$63.50
Tax on the sale in Connecticut
All results
MeasureResult
Statewide base rate6.35%
Combined rate6.35%
State tax$63.50
Local tax$0.00
Sales tax due$63.50
Total with tax$1,063.50
Sales counted toward the threshold$90,000
Sales test (at least $100,000)Not met
Transaction test (at least 200)Not met
Economic nexus reached
Below the Connecticut threshold
No
How this was worked out
Work shownrecomputed as you type
Sales tax = sale x (6.35% + local rate)
Nexus when counted sales are at least $100,000 and transactions are at least 200, in the 12 months ending on the preceding September 30

Illustrative arithmetic on the figures you enter. Check the result against your firm's methodology before relying on it.

The formulas

  • Sales tax = sale x (6.35% + local rate)
  • Nexus when counted sales are at least $100,000 and transactions are at least 200, in the 12 months ending on the preceding September 30

How it works

Figures current as of November 2026.

The general rate is 6.35 percent. Connecticut has no local sales tax. The tool multiplies the sale amount by the statewide base rate plus the local rate you enter (zero: Connecticut has no local sales tax) and shows the state and local parts separately.

A seller with no physical presence in Connecticut must register and collect once it has at least $100,000 of gross receipts from retail sales into Connecticut and at least 200 separate transactions in the 12 months ending on the preceding September 30.

A seller with a physical presence in Connecticut, such as staff, an office or inventory, must collect regardless of the threshold. The tool does not decide whether a product is taxable or exempt; enter the taxable price.

Illustrative figures only. Check the result against your firm's methodology before relying on it.

Common questions

What is the Connecticut sales tax rate?

The general rate is 6.35 percent. Connecticut has no local sales tax.

What is the Connecticut economic nexus threshold?

At least $100,000 of gross receipts from retail sales into Connecticut and at least 200 separate transactions in the 12 months ending on the preceding September 30.

Sources

Runs in your browser. The figures you type are not sent to CORAA or stored. Check the result against your firm's methodology before relying on it.

Related audit calculators

CalculatorDistrict of Columbia Sales Tax Calculator and Remote Seller Nexus Check (6%)Sales tax on a sale at the 6% statewide rate plus your local rate, and whether your sales into District of Columbia pass the $100,000 or 200-transaction economic nexus threshold.CalculatorFlorida Sales Tax Calculator and Remote Seller Nexus Check (6%)Sales tax on a sale at the 6% statewide rate plus your local rate, and whether your sales into Florida pass the $100,000 economic nexus threshold.CalculatorGeorgia Sales Tax Calculator and Remote Seller Nexus Check (4%)Sales tax on a sale at the 4% statewide rate plus your local rate, and whether your sales into Georgia pass the $100,000 or 200-transaction economic nexus threshold.
For US CPA firms

Join the CORAA waitlist

CORAA AI drafts audit working papers from your client’s QuickBooks books and does the first pass: lead schedules, tie-out, memos, draft notes and letters. CORAA Network reviewers clear every finding. Your firm reviews and signs.

  • First audit free, so you can judge the quality on a real file
  • Flat fee by entity size; messy books included
  • We work only with CPA firms, never their clients
See how it works →

* required