Connecticut Sales Tax Calculator (2026) — Add or Reverse Tax
Connecticut's combined sales tax rate is 6.35% (6.35% state). Use the calculator below to add Connecticut sales tax to a price, or reverse a tax-included total to find the pre-tax price and exact tax amount.
How to use this calculator:
- Adding tax — enter a pre-tax price, pick "Add tax to price," and the calculator applies the Connecticut rate to show the tax amount and final total.
- Reversing (extracting) tax — enter a total that already includes tax, pick "Extract tax from total," and the calculator divides by 1 + the rate to isolate the pre-tax price and the exact tax paid.
- Pick the rate that matches your situation: the average combined rate is a good statewide estimate, but the state-only or maximum-local rate is more precise if you know the exact city or county.
Understanding Connecticut Sales Tax
Connecticut's state sales tax rate is 6.35%, with no additional local sales tax in most of the state.
Connecticut also levies a state income tax, which shapes how much the state relies on sales tax revenue relative to other funding sources.
Groceries
Exempt from Connecticut state sales tax.
Largest city
Bridgeport
State income tax
Yes
Why Reverse Sales Tax Calculation Matters
Receipts, invoices, and marketplace payouts usually show only the tax-included total — not the pre-tax price. Reversing the calculation matters for bookkeeping (separating revenue from tax collected), expense reports (reimbursing only the pre-tax cost), and price comparisons (checking what an item actually costs before Connecticut's tax is applied). Because dividing by (1 + rate) is not the same as simply subtracting the rate from the total, doing this by hand is a common source of errors — the calculator above handles it exactly.
Connecticut Taxability at a Glance
🛒 Groceries
Exempt
👕 Clothing
Taxable
💊 Prescription drugs
Exempt
History & Rate Breakdown
Connecticut's sales and use tax took effect July 1, 1947, and has operated as a single flat statewide rate ever since — Connecticut is one of the few states with no local sales tax layered on top of the state rate at all.
Connecticut's 6.35% rate is entirely state-level; there is no county or city sales tax anywhere in Connecticut. The one exception is a two-tier luxury structure: motor vehicles over $50,000, jewelry over $5,000, and clothing/footwear over $1,000 are taxed at a higher 7.75% luxury rate, while clothing and footwear priced $50 or under are fully exempt.
Where the Money Goes
Connecticut's sales tax revenue supplements the broader state budget alongside its income tax, funding general government operations without any local sales tax revenue-sharing since there are no local rates.
Business Use Case: Registering & Collecting Connecticut Sales Tax
An out-of-state retailer whose Connecticut sales exceed $100,000 (or 200 separate transactions) must register with the Department of Revenue Services, and — unusually for a flat-rate state — must also track whether any individual item crosses the $1,000 luxury clothing threshold or $5,000 jewelry threshold, since those trigger the higher 7.75% rate regardless of the buyer's total order size.
Sales Tax Terms Glossary
Combined rate
The state sales tax rate plus any applicable local (city, county, or special district) rates — the actual rate charged at checkout in a given location.
Reverse sales tax
The process of working backward from a tax-included total to find the pre-tax price and the exact tax amount, using total ÷ (1 + rate) = pre-tax price.
Economic nexus
A sales threshold (in dollars, transaction count, or both) that obligates an out-of-state seller to collect and remit sales tax even without a physical presence in the state.
Marketplace facilitator
A platform (e.g. Amazon, Etsy, eBay) that collects and remits sales tax on behalf of third-party sellers under most states’ marketplace facilitator laws.
Real-World Example
A $500.00 purchase in Connecticut at the average combined rate of 6.35%:
- Tax amount: $500.00 × 6.35% = $31.75
- Total price: $500.00 + $31.75 = $531.75
Connecticut Sales Tax Compliance for Sellers
Remote and online sellers establish economic nexus in Connecticut once they exceed $100,000.00 in annual sales or 200+ separate transactions. Once nexus is established, a seller must register with the state, collect Connecticut sales tax at checkout, and file returns on the state's required schedule. Marketplace facilitators (Amazon, Etsy, eBay, Walmart) generally collect and remit on behalf of third-party sellers automatically.
Frequently Asked Questions — Connecticut Sales Tax
What is the sales tax rate in Connecticut?▾
Does Connecticut tax groceries?▾
Does Connecticut have a state income tax?▾
When do online sellers need to collect Connecticut sales tax?▾
How do I calculate Connecticut sales tax on a purchase?▾
How do I reverse Connecticut sales tax to find the price before tax?▾
What is the formula to back out sales tax from a receipt in Connecticut?▾
References & Sources
Rates last verified January 2026. Connecticut sales tax rates and thresholds can change — always confirm current figures with the Connecticut Department of Revenue before filing or invoicing. This tool is for estimation and educational purposes only and is not tax, legal, or accounting advice.
Jordan Hayes
Verified AuthorLead Content Editor & Personal Finance Specialist
Jordan Hayes is a personal finance content strategist with 9+ years building educational finance and health resources. He has written and fact-checked over 200 personal finance guides covering mortgage amortization, retirement planning, tax strategy, and budgeting. His work applies IRS publications, Federal Reserve data, and peer-reviewed research to make complex calculations accessible.