Key takeaways
- The state rate is 6.25%, and the filing frequency follows estimated annual liability: $100 or less is annual, more than $100 up to $1,200 is quarterly, and more than $1,200 is monthly.
- The statute gives vendors 30 days after the period ends, even though the published regulation text still says the 20th.
- Restaurant meals are taxable and go on a separate meals return, Form ST-MAB-4, that does not count as the regular sales tax filing.
- A seller that holds a good-faith Form ST-16 from an unrelated marketplace facilitator does not collect on the facilitated sales.
- A remote seller that passes $100,000 after November 1 does not start collecting on the following January 1.
What the return covers and what rate applies
The state sales tax rate under M.G.L. c. 64H, section 2 is 6.25% of the vendor's gross receipts from sales of tangible personal property and services. The vendor files electronically through MassTaxConnect, the Department of Revenue portal, and the 6.25% is applied to taxable sales after exempt sales are removed.
Exempt sales only help the client if the records prove them. For meals-type businesses the regulation says that when a vendor's records do not substantiate nontaxable sales, all sales are considered taxable. Keep certificates on file for resale and exempt-use sales.
Pick and lock the filing frequency
The regulation at 830 CMR 62C.16.2 ties frequency to estimated liability for the calendar year, excluding the meals tax: $100 or less files annually, more than $100 but not more than $1,200 files quarterly, and more than $1,200 files monthly. The schedule chosen at the first return must be followed for the entire calendar year, and the vendor cannot change it on its own mid-year.
Set a new client's frequency from a real estimate. A retailer with $4,000 a month in taxable sales owes about $250 a month at 6.25%, which is $3,000 a year, so it is a monthly filer. Registering it as a quarterly filer on a low guess leaves the wrong schedule in place for the whole calendar year.
Due dates: 30 days, not the 20th
M.G.L. c. 62C, section 16(h) says vendor returns are filed within 30 days after the period they cover ends. The published text of 830 CMR 62C.16.2 still says the 20th, which predates that change. 830 CMR 64H.1.9(7) shows both, the 20th and then the 30th for tax periods ending on or after April 1, 2021. Treat the statute as controlling and the 20th as stale.
Count from the last day of the period. A monthly period ending October 31, 2026 runs 30 days to November 30, 2026. November 2026 runs to December 30, 2026. The fourth quarter of 2026 and the 2026 annual return both run 30 days from December 31, 2026, which lands on Saturday, January 30, 2027.
The sources I could read do not state how Massachusetts treats a due date that falls on a weekend, so do not rely on a roll to Monday. Put the working due date on Friday, January 29, 2027, and confirm the date shown for the period in MassTaxConnect. A late payment is a penalty and interest problem for the client, so the cautious date costs nothing.
A return is required even when the period had no sales. Put nil periods on the same calendar as the others, because a missed zero return is the easiest notice to prevent.
Meals tax: a separate return
Sales of meals by a restaurant are taxable at the 6.25% rate, while food products for human consumption sold otherwise are generally exempt. Under 830 CMR 64H.6.5, tax-free restaurant sales include food sold by weight or count or in unopened original containers, beverages in unopened original containers of at least 26 fluid ounces, and bakery products in units of six or more.
A city or town may also accept a local option meals excise of 0.75% under M.G.L. c. 64L, section 2. If a client sells in a town that accepted it, the local option is added on top of the state 6.25%. On $48,000 of taxable meals in a month, the state tax is $3,000 and the local option is $360. Confirm that the town accepted the option before you apply it, since it is not automatic.
A vendor of meals files the meals return on Form ST-MAB-4 monthly, and that return is not a filing for other sales and use tax. A restaurant that also sells gift items, retail bottled goods or taxable services therefore files two returns for the same month, and filing one does not satisfy the other.
For a mixed client, ask for the point-of-sale report split by category rather than the processor deposit total. Send this: "For each month, please send the sales report broken out by prepared meals, packaged retail items and anything sold for resale, plus the tax collected line." A bundled total is how a restaurant ends up reporting tax-free items as meals, or the reverse.
Marketplace facilitators: what stays on the seller's return
A marketplace facilitator that provides the listing, price-setting, order-taking and payment processing for third-party sellers collects once its Massachusetts sales cross $100,000 in a calendar year. An in-state facilitator collects on its own sales regardless of amount, and a remote marketplace seller's Massachusetts sales do not include sales a facilitator makes on its behalf when that facilitator collects and remits.
A facilitator must certify its collection in advance by providing Form ST-16. A seller that accepts the ST-16 from an unrelated facilitator in good faith is not required to collect or remit tax on those facilitated sales. If the facilitator is related to the seller, the seller stays liable when the facilitator fails to collect and remit, so a related-party ST-16 is not a safe harbor.
Meal delivery is a special case. On an interim basis, a person facilitating meal sales is not a marketplace facilitator to the extent the restaurants themselves are registered to collect and remit sales tax. A restaurant selling through a delivery app therefore still reports its own meal sales on the meals return.
Remote sellers: when collection starts
A remote retailer with no traditional in-state contacts generally must collect once it exceeds $100,000 in Massachusetts sales in a calendar year. Massachusetts sales means all sales delivered into the state, including exempt sales, so counting only taxable orders understates the total.
Timing follows 830 CMR 64H.1.9(3)(a)2. For calendar years beginning with 2020, a seller that passed $100,000 after November 1 of the prior year, or that first crosses the line during the current year, starts collecting on the first day of the first month beginning two months after the month it crossed. The regulation's Example 2 has a seller reaching $100,000 on May 15, 2020 and collecting from August 1, 2020. By the same pattern, a crossing in November 2026 points to February 1, 2027, so confirm that before you tell a client.
Example 1 in the regulation, a crossing in October 2019 with collection from January 1, 2020, was a 2019 transition case. It does not describe the rule for 2020 and later years, and it should not be used to tell a seller that a crossing before November 1 means a January 1 start.
For an out-of-state client, pull Massachusetts-delivered sales by ship-to state each month and record the month the total passes the line, because that month starts the clock.
A month-end routine that prevents notices
Before the due date, reconcile the tax collected to the sales tax liability account, and taxable sales to gross sales less exempt, resale and marketplace sales. Send the client: "Please confirm all sales through the last day of the month are in the system, and send any new resale certificates or ST-16 forms received this month." Keep the confirmation and the certificates together for each period.