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Connecticut Sales Tax Calculator

This free Connecticut sales tax calculator starts from the state's 6.35% base rate. Add tax to a net price, or work backwards from a tax-inclusive total. This state has no local sales tax, so the state rate is the full general rate.

Connecticut Sales Tax Calculator

Results update live as you type. Nothing leaves your browser.

Your Numbers
“Add tax” starts from a net price. “Remove tax” works backwards from a total that already includes tax. This is the STATE base rate — county and city taxes may add more on top. If you know your combined local rate, type it into the rate field.
Your result
0.00
total including tax
Net amount (before tax)0.00
Tax amount0.00
Gross amount (with tax)0.00
Add this to a free invoice →

State base rate verified October 2026 · Source: Tax Foundation, 2026 sales tax rates (midyear)

How to calculate Connecticut sales tax in 3 steps

  1. Enter your amount. Type the price you are working with — either before tax or tax-inclusive, depending on what you have.
  2. Pick the rate and direction. The 6.35% state base rate is pre-filled and editable; choose “Add tax” or “Remove tax”.
  3. Read the split instantly. You get the net amount, the exact tax, and the gross total — ready to quote, invoice, or check a receipt against.

Why getting the Connecticut split right matters

Quoting a price without the tax — or adding tax twice — is how invoices turn into arguments. This calculator keeps the maths honest: the net, the tax and the total, split out in plain sight. When the numbers are right, drop them straight into the free invoice generator — flat tax, per-line tax and GST modes are built in.

See all 50 states plus DC →

Connecticut sales tax FAQ

The statewide base rate is 6.35%. This state has no local sales tax, so the state rate is the full general rate.
No. Connecticut has no local sales tax, so the 6.35% state rate is the full general rate for most retail sales.
Multiply the net price by the rate and add it on: a $500.00 item at 6.35% gives $31.75 of tax and a $531.75 total. In the calculator, choose “Add tax”, enter the amount and rate, and the split appears instantly.
Divide the gross total by (1 + rate ÷ 100). At 6.35%, a $500.00 total divides to a $470.15 net — the tax inside it is $29.85. Choose “Remove tax” in the calculator and it does this for you.
Yes — unlimited calculations, no signup, no watermark. Everything runs in your browser; nothing you type is uploaded anywhere.
Use the free invoice generator: add your items, choose flat tax, per-line tax or GST mode, and the tax is calculated and shown on the invoice automatically — ready to download as a PDF.

Related calculators

See all 50 states plus DC, try the tax calculator for any rate, or put the result on a free invoice. More state calculators: Colorado · Delaware.