Connecticut Sales Tax Rates: 2026 County Guide
Complete sales tax breakdown for all 9 counties in Connecticut. Select a county to see city-level rates and How-To guides.
Connecticut Base State Tax Rate
| Jurisdiction | Rate |
|---|---|
| Connecticut State Sales Tax | 6.400% |
| Total Combined Rate | 6.400% |
Connecticut Sales Tax Rules, Local Rates and Nexus Notes
Data-rich guideA clear understanding of Connecticut's sales tax guidelines is essential for any business shipping tangible personal property into the state. This guide provides the foundation for tracking rates, filing deadlines, and economic thresholds across the state.
This rate matches the estimated state average combined rate of 6.400% across local jurisdictions. A review of the tax breakdown shows: The combined rate of 6.400% consists of a 6.400% state rate.
A population of 3,605,944 indicates a robust local market. Shippers must confirm whether specific delivery destinations lie inside or outside the formal city limits to apply the correct combined rate. Precise location mapping is critical for merchants to ensure tax is collected accurately at the point of delivery.
For remote sellers, Connecticut's economic nexus parameters establish when tax registration is required. Monitoring overall sales across the state is necessary to remain compliant. To stay compliant, compare your sales numbers against the state thresholds: Remote sellers meet economic nexus rules in CT if they reach $100,000 in gross sales or 200 separate transactions within a calendar year. Be aware that specific exemptions, such as for grocery items, are decided at the state level. Verify your local registration status and filing frequency with the Connecticut tax department to ensure full compliance.
Rate data last checked in the database: March 2026
Economic Nexus Threshold
Avg Local Tax Rate
State Nexus Checker
Use current state threshold data before you register or start collecting.
Nexus estimate
State Exemption Finder
Guide buyers and sellers toward the right official exemption paperwork path.
State Product Taxability Checker
Version 1 covers the tax categories already modeled in the current database.
State-aware estimate
Verify with official sourceAll 9 Connecticut Counties
Capitol
Greater Bridgeport
Lower Connecticut River Valley
Naugatuck Valley
Northeastern Connecticut
Northwest Hills
South Central Connecticut
Southeastern Connecticut
Western Connecticut
Largest Cities in Connecticut
These major city pages usually attract the strongest commercial intent and create more downstream tool usage.
Highest Tax Cities in Connecticut
Comparison links like these help users move from broad state intent into more specific local rate pages.
Sales Tax Calculator
Using the current combined rate for Connecticut.
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Effective rate:
Rounded to the nearest cent. Tax treatment of shipping and discounts can vary by state.
Sitewide Helper
Sales Tax Calculator & Compliance Helper
One compact utility block for tax calculation, reverse calculation, ZIP lookup, nexus checks, exemption guidance, and product taxability.
Advanced Sales Tax Calculator
Estimate tax with shipping, discounts, and exempt subtotal support.
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Selected location
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Effective rate:
Rounded to the nearest cent. Tax treatment of shipping and discounts can vary by state.
Reverse Sales Tax Calculator
Work backward from the total paid to estimate the pre-tax price and tax amount.
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ZIP / City Sales Tax Lookup
Search by ZIP code, city, county, or state to find current combined rates and local breakdowns.
Economic Nexus Checker
Compare your state-specific sales activity against current nexus thresholds using existing site data.
Nexus estimate
Should I Collect Sales Tax?
A fast intent-matching decision tree for businesses, marketplace sellers, and remote sellers.
Do you sell taxable goods or taxable services?
Do you sell into states outside your home state?
Have you crossed a nexus threshold in a destination state?
Do marketplaces handle most of your sales?
Do you have physical presence in the state?
Decision
Exemption Certificate Finder
Point buyers and sellers toward the right official portal and documentation checklist.
Product Taxability Checker
Version 1 uses the categories already modeled in the current database and always links back to official verification.
State-aware estimate
Verify with official source