Which state has the lower sales tax nexus threshold, Massachusetts or Connecticut?

Both Massachusetts and Connecticut publish the same economic nexus dollar threshold of $100,000, so a remote seller would reach each state's published threshold at the same level of in-state sales. These are the thresholds published by each state's tax authority as of 2026-05-31; confirm against the official source before registering.

Do both Massachusetts and Connecticut have marketplace facilitator laws?

Yes. Both Massachusetts and Connecticut have marketplace facilitator laws, so marketplaces such as Amazon, Etsy, and eBay collect and remit sales tax on the sales they facilitate in both states. Direct-to-consumer sales you make outside a marketplace remain your own responsibility once you cross each state's threshold. Verified 2026-05-31.

Which has the lower sales tax rate, Massachusetts or Connecticut?

Massachusetts has the lower combined state and local sales tax rate at 6.25%, compared with 6.35% in Connecticut. These are the statewide base rate plus the average local rate; the exact rate depends on the customer's delivery address. As of 2026-05-31.

Do I need to register for sales tax in both Massachusetts and Connecticut?

It depends on where you cross each state's economic nexus threshold (or have physical presence there). Massachusetts's published threshold is $100,000, and Connecticut's is $100,000 or 200 transactions. You generally register in a state only once you cross its threshold, so you may have an obligation in one, both, or neither. Run the nexus calculator with your actual sales and confirm with each state's official source. Thresholds as of 2026-05-31.

When did economic nexus take effect in Massachusetts and Connecticut?

Massachusetts's economic nexus rule took effect on 2019-10-01, and Connecticut's took effect on 2019-07-01. Both stem from the 2018 South Dakota v. Wayfair Supreme Court decision, which let states require remote sellers to collect once an economic threshold is met.

Massachusetts vs Connecticut Sales Tax Nexus — Comparison 2026

Updated 2026-05-31

Compare economic nexus thresholds, state and local rates, and filing rules in Massachusetts and Connecticut.

Metric	Massachusetts	Connecticut
Economic nexus threshold	$100,000	$100,000
Transaction threshold	None	200
State rate	6.25%	6.35%
Avg. local rate	n/a	n/a
Combined state + local	6.25%	6.35%
Marketplace facilitator	Yes	Yes
Effective since	2019-10-01	2019-07-01

Which state is easier for sellers?

For low-revenue sellers: nexus triggers first in both states because of its threshold. If you cross that first, you register there first.

On rate: Massachusetts is friendlier for customers with a combined state + local rate of 6.25% vs 6.35%.

Connecticut also adds a 200-transaction trigger that Massachusetts doesn't have.

Massachusetts — nexus note

Economic nexus in Massachusetts triggers at $100,000 in gross sales delivered into Massachusetts in the current or prior calendar year. No transaction count threshold.

Connecticut — nexus note

Economic nexus in Connecticut requires BOTH more than $100,000 in gross sales AND more than 200 separate transactions delivered into Connecticut in the prior year. Both thresholds must be met.

What to do next

Use the nexus calculator to check exactly which of Massachusetts and Connecticut you've already triggered. Then read each state's full guide:

Massachusetts overview →Connecticut overview →

Frequently asked questions

Which state has the lower sales tax nexus threshold, Massachusetts or Connecticut?: Both Massachusetts and Connecticut publish the same economic nexus dollar threshold of $100,000, so a remote seller would reach each state's published threshold at the same level of in-state sales. These are the thresholds published by each state's tax authority as of 2026-05-31; confirm against the official source before registering.
Do both Massachusetts and Connecticut have marketplace facilitator laws?: Yes. Both Massachusetts and Connecticut have marketplace facilitator laws, so marketplaces such as Amazon, Etsy, and eBay collect and remit sales tax on the sales they facilitate in both states. Direct-to-consumer sales you make outside a marketplace remain your own responsibility once you cross each state's threshold. Verified 2026-05-31.
Which has the lower sales tax rate, Massachusetts or Connecticut?: Massachusetts has the lower combined state and local sales tax rate at 6.25%, compared with 6.35% in Connecticut. These are the statewide base rate plus the average local rate; the exact rate depends on the customer's delivery address. As of 2026-05-31.
Do I need to register for sales tax in both Massachusetts and Connecticut?: It depends on where you cross each state's economic nexus threshold (or have physical presence there). Massachusetts's published threshold is $100,000, and Connecticut's is $100,000 or 200 transactions. You generally register in a state only once you cross its threshold, so you may have an obligation in one, both, or neither. Run the nexus calculator with your actual sales and confirm with each state's official source. Thresholds as of 2026-05-31.
When did economic nexus take effect in Massachusetts and Connecticut?: Massachusetts's economic nexus rule took effect on 2019-10-01, and Connecticut's took effect on 2019-07-01. Both stem from the 2018 South Dakota v. Wayfair Supreme Court decision, which let states require remote sellers to collect once an economic threshold is met.

Sources

date_retrieved: Massachusetts 2026-05-27 · Connecticut 2026-05-31

Massachusetts: https://www.mass.gov/orgs/massachusetts-department-of-revenue
Massachusetts: https://www.mass.gov/info-details/remote-sellers-and-marketplace-facilitators
Massachusetts: https://www.salestaxinstitute.com/resources/economic-nexus-state-guide
Massachusetts: https://taxfoundation.org/data/all/state/sales-tax-rates/
Connecticut: https://portal.ct.gov/DRS
Connecticut: https://portal.ct.gov/drs/sales-tax/tax-information
Connecticut: https://www.salestaxinstitute.com/resources/economic-nexus-state-guide
Connecticut: https://taxfoundation.org/data/all/state/sales-tax-rates/