How do I use the Connecticut sales tax calculator?

Enter the ZIP code where the buyer receives the order, or start typing the address and pick a suggestion, then enter the price. The calculator shows the combined rate for that ZIP and its state, county, city and district parts, the sales tax on the price, and the total.

Is the rate the same everywhere in Connecticut?

Yes. Every Connecticut ZIP code has the same combined rate, 6.35%. A $100.00 sale carries $6.35 in tax.

Does the calculator include every tax that applies in Connecticut?

It uses the general sales tax rate for the ZIP code. It doesn’t account for products taxed at a different rate or exempt, or for exemptions that depend on the buyer. The Connecticut sales tax guide covers what’s taxable and when you have to collect.

Can I work backward from a total that already includes tax?

Yes. The reverse sales tax calculator takes a tax-inclusive total and a ZIP code and splits the total into the price before tax and the sales tax.

Rates as of September 2026

Connecticut Sales Tax Calculator

Connecticut’s sales tax rate is 6.35% everywhere in the state, with no local sales taxes.

Results

Enter a Connecticut ZIP code to see its combined state, county, city and district rate.

Calculate tax on a sale

Sale amount

Look up a rate, then enter an amount to see the tax and total.

This is an estimate based on location alone. The tax you owe also depends on what you sell, who you sell to and the exact delivery address. If you intend to rely on these rates, use the Kintsugi platform (opens in a new tab).

How the Connecticut calculator works

Enter a ZIP code and the calculator adds up the state, county, city and district rates for it, multiplies your amount by the total and rounds the tax to the nearest cent. For the formula and worked examples, see how to calculate sales tax. Rates are as of September 2026.

Read the Connecticut sales tax guide for what’s taxable, when you have to register and how to file. For other states, use the US sales tax calculator, and to split a tax-inclusive total, the reverse sales tax calculator.

Connecticut sales tax rates at a glance

ZIP codes in the rate data: 420
Combined rate in every ZIP code: 6.35%

When you have to collect Connecticut sales tax

A remote seller has to register and collect Connecticut sales tax once its sales into the state meet the economic nexus threshold: $100,000 in sales and 200 transactions in the 12 months ending September 30, per the state tax agency. A physical presence such as an office, employees or inventory creates nexus on its own. The Connecticut sales tax guide covers registration and filing once you do.

Frequently Asked Questions

Using the calculator

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