Verified April 2026
How to Calculate Sales Tax in Middlesex, Massachusetts
2026 Step-by-Step Guide for Businesses & Consumers
Current Middlesex Sales Tax Rate
| Jurisdiction | Rate |
|---|---|
| Massachusetts State Sales Tax | 6.300% |
| Total Combined Rate | 6.300% |
How to Calculate Sales Tax in Middlesex
-
1
Find the combined rate
The combined sales tax rate in Middlesex is 6.300%. This equals: Massachusetts state rate of 6.300% + County 0.000%.
-
2
Convert the percentage to a decimal
6.300 ÷ 100 = 0.0630
-
3
Multiply by your purchase amount
Example: $100.00 × 0.0630 = $6.30 in sales tax
-
4
Add tax to the original price
$100.00 + $6.30 = $106.30 total cost
What's Taxable in Massachusetts?
Most tangible personal property is taxable in Massachusetts. Check with the
Massachusetts Department of Revenue for specific exemption categories.
Do You Have Nexus in Massachusetts?
Economic Nexus Threshold
If your business has over $100,000 in annual
Massachusetts sales or 200 transactions,
you are required to collect and remit Massachusetts sales tax. This applies to out-of-state remote sellers too.
Expert Sales Tax Tips for Middlesex
Out-of-State Sellers
Selling into Massachusetts from out of state? Register before you cross the $100,000 threshold to avoid back taxes and penalties.
Frequently Asked Questions
Sales Tax Calculator
Using 6.300% rate for Middlesex
$
Tax Amount
$0.00
Total with Tax
$100.00
Rate applied: 6.300% combined