When does a remote seller's duty to collect start after one large sale crosses the threshold?

A seller of industrial equipment with no property, employees, or inventory in Massachusetts takes a single March order from a Massachusetts manufacturer for $1 million of machinery, delivered to the buyer's plant. Its prior-year Massachusetts sales were a few thousand dollars of spare parts. The threshold question is easy; the harder one is whether tax is due on the $1 million invoice and, if not, on which invoice collection begins. The library's article on what South Dakota v. Wayfair, Inc., 585 U.S. 162 (2018), decided covers the thresholds; this article takes up only the start date.

Why the threshold and the start date are separate rules

Wayfair itself drew the distinction, describing South Dakota's statute as one that "applies only to sellers that, on an annual basis, deliver more than $100,000 of goods or services into the State or engage in 200 or more separate transactions" and noting that it "forecloses the retroactive application of this requirement." A threshold is a nexus rule: it says when a seller has enough economic contact to be made a collection agent. It does not say which sale is the first one on which the agent must act. That second rule is set by statute, by regulation, or in some states only by agency guidance.

The rules diverge for a practical reason: taxing the crossing sale would require every remote seller to track a running total in real time and switch collection on mid-invoice. States instead measure the threshold over a period, let the seller determine after the fact that it has been crossed, and give a defined interval to register and begin: the next sale, a fixed lag of months, or a quarter-based lookback.

Massachusetts: the first day of the first month beginning two months after the crossing

Massachusetts imposes the obligation by statute at G.L. c. 64H, section 34: a remote retailer is subject to registration and collection if "its sales within the commonwealth in the prior taxable year or the current taxable year exceed $100,000." The timing is in 830 CMR 64H.1.9(3)(a), which for calendar years from 2020 forward gives two clauses. Clause 2.a applies as of January 1 of a year if the retailer's Massachusetts sales in the preceding calendar year exceeded $100,000, with a proviso that a retailer which passed the number after November 1 of the prior year starts "as of the first day of the first month beginning two months after the month in which the $100,000 threshold is exceeded." Clause 2.b covers everyone else: if 2.a does not apply, the obligation begins "as of the first day of the first month beginning two months after the month in which the remote retailer first exceeds $100,000 in Massachusetts sales for the calendar year."

The regulation's own example fixes the arithmetic. In Example 2 of section (3)(e), a remote retailer with prior-year sales under the threshold reaches $100,000 on May 15 and "is required to register, collect and remit tax beginning as of August 1." The month of crossing is May, the two intervening months are June and July, and the obligation starts on the first day of the month after those. Applied to the equipment seller, a $1 million sale in March produces a collection obligation beginning June 1. The March invoice carries no Massachusetts tax, nor do any April or May invoices. From June 1 the seller collects on every taxable Massachusetts sale, and because its current-year sales now exceed $100,000, clause 2.a places it under the obligation from January 1 of the following year as well.

Two features of the measure deserve attention. First, "Massachusetts sales" under section (2) of the regulation means all sales of tangible personal property or services delivered into the state, "including exempt sales," so a seller whose one large order was a nontaxable sale for resale has still crossed and still registers. Second, clause 2.a's proviso and clause 2.b produce the same two-month lag, so the only crossing that produces a January 1 start is one that occurred before November 1 of the prior year; the Department's published FAQ on remote sellers states both rules in the same terms.

California: the next sale after the one that crossed

California's threshold sits in the statute. Cal. Rev. & Tax. Code section 6203(c)(4)(A) treats as a retailer engaged in business in the state any retailer that, "in the preceding calendar year or the current calendar year, has total combined sales of tangible personal property for delivery in this state by the retailer and all persons related to the retailer that exceed five hundred thousand dollars ($500,000)," and subparagraph (B) borrows the related-person definition of Internal Revenue Code section 267(b). The timing comes from the CDTFA's regulation. Under Cal. Code Regs., tit. 18, section 1684(b)(4)(B), a retailer that exceeds the measure during the current calendar year "is required to register with the Department and begin collecting use tax immediately after the sale was made that exceeded the five hundred thousand dollar ($500,000) threshold." The regulation's example makes the boundary concrete: a retailer whose $900 jewelry sale on August 1 brings its year's California deliveries to $500,400 must collect "on its retail sales to California customers made after the $900 sale."

California therefore has no gap beyond the crossing sale itself, the sharpest result among the five states for a single large order: a $1 million delivery into California by a seller with no prior-year California sales carries no seller collection, and the $50 replacement part shipped the next day does. The same moment governs the district taxes: under Cal. Code Regs., tit. 18, section 1827(c)(3)(B), the retailer must "begin collecting district use tax for all districts immediately after the sale was made" that exceeded the $500,000 threshold, a subject the library's article on whether the billing or the shipping address decides the California rate takes up.

The regulation also answers when the obligation ends. Under section 1684(e)(3), a retailer is not required to remain registered on January 1 of a subsequent year if, on that date and throughout the preceding calendar year, it had no physical presence sufficient for substantial nexus and its preceding-year sales for delivery in California did not exceed $500,000. A single large sale therefore commits the seller to collection for the balance of the year of the sale and for all of the following year. And because related persons are aggregated, the one large sale may be an affiliate's, and the obligation it triggers is the seller's.

New York: nothing happens until the four-quarter lookback closes

New York is the outlier, and for a single-sale crossing it is the state most likely to produce no obligation at all. Tax Law section 1101(b)(8)(i)(E) makes a vendor of a person who regularly or systematically solicits business in the state and by reason of that solicitation makes sales of tangible personal property into it, if the solicitation satisfies the constitutional nexus requirement. Clause (iv) of the same paragraph supplies the presumption: a person is presumed to be regularly or systematically soliciting business "if, for the immediately preceding four quarterly periods ending on the last day of February, May, August and November, the cumulative total of such person's gross receipts from sales of property delivered in this state exceeds five hundred thousand dollars and such person made more than one hundred sales of property delivered in this state," unless the person demonstrates to the Commissioner's satisfaction that it "cannot reasonably be expected" to exceed either figure "for the next succeeding four quarterly periods." A seller whose crossing was a single nonrecurring order is the paradigm candidate for that showing.

Three consequences follow. First, the measure is a lookback over completed sales tax quarters, not a running total for the current one. A $1 million sale delivered in April is not in the "immediately preceding four quarterly periods" until the quarter ending May 31 closes, so nothing about the April sale can trigger the presumption before June 1; the Department's published guidance instructs a review of New York sales "after the conclusion of each sales tax quarter." Second, the prongs are conjunctive. A seller that delivered $1 million into New York in a single transaction, with one hundred or fewer other deliveries over the lookback, has not met the presumption, because the statute requires that the dollar figure be exceeded "and" that the seller made more than one hundred sales. Third, once both prongs are met, Tax Law section 1134(a)(1) sets the registration clock: a person who is a vendor solely by reason of clause (E) files a certificate of registration "within thirty days after the day on which the cumulative total" for those four quarterly periods exceeds both figures. The statute's general rule requiring a certificate "at least twenty days prior to commencing business" does not reach that vendor, because it applies to persons required to collect tax "other than a person who is a vendor solely by reason of clause (D), (E) or (F)." The collection clock comes from the Department, whose guidance instructs that the vendor register within thirty days and "begin to collect tax 20 days thereafter."

For the equipment seller, the $1 million delivery lands in April. If the seller also made more than one hundred New York deliveries over the four quarters ending May 31, the thresholds are met on June 1, registration is due by July 1, and collection begins twenty days after registration. If its transaction count was one hundred or fewer, the presumption is not met, and any New York obligation rests on its actual solicitation activity under clause (E) rather than on the dollar figure. Gross receipts for the dollar prong, per the same guidance, are "the amount received for all sales of tangible personal property delivered into New York, whether taxable or exempt, without any deductions for expenses," and a vendor whose lookback later falls below the thresholds with no other vendor connection "can file a final return and stop collecting."

Texas and Washington: a fixed lag measured in months

Texas sets its threshold by rule rather than statute. Tex. Tax Code section 151.107(a) lists the activities that make a retailer engaged in business in the state, and the Comptroller has adopted a remote-seller safe harbor in its rule on seller's and purchaser's responsibilities, 34 TAC section 3.286. The Comptroller's published remote-seller guidance states the rule in two sentences: remote sellers "with total Texas revenue of less than $500,000 in the preceding twelve calendar months are not required to obtain a tax permit or collect, report and remit state and local use tax," and a seller that exceeds the amount must obtain a permit and begin collecting "no later than the first day of the fourth month after the month that a remote seller exceeds the $500,000 safe harbor amount." Total Texas revenue is gross revenue from taxable and nontaxable sales of tangible personal property and services into Texas, including sales for resale and sales to exempt entities. Applied to a $1 million March delivery by a seller with no prior Texas sales, the obligation begins no later than July 1, and the March through June invoices carry no seller collection.

Washington writes both halves into statute. RCW 82.04.067(1)(c)(i) deems a person engaging in business to have substantial nexus if, "in the current or immediately preceding calendar year," it had "more than one hundred thousand dollars of cumulative gross receipts from this state," measured under subsection (2) as all gross income of the business attributed to Washington. RCW 82.08.052(2) provides that, beginning January 1, 2020, a seller with substantial nexus under RCW 82.04.067 is obligated to collect and remit retail sales tax, and subsection (4)(a) states when: a remote seller begins "on the first day of the first calendar month that is at least thirty days from the date that the remote seller becomes required" to collect, while a seller with a physical presence in the state begins "immediately upon establishing a tax collection obligation." The thirty-day rule produces a start date that depends on where in the month the crossing lands. A $1 million delivery that pushes the seller over $100,000 on May 1 produces a start date of June 1, thirty-one days later; the same delivery on May 15 produces July 1, because June 1 is only seventeen days away. Those results are arithmetic from the statute, not an agency example. Because the nexus test reaches "the current or immediately preceding calendar year," the obligation created by a current-year crossing continues through the whole of the following year.

Where only guidance, or nothing, fixes the date

New Jersey shows the third source of the rule. Its statute, N.J.S.A. 54:32B-3.5 (P.L. 2018, c. 132, section 1), requires a seller without physical presence to collect if its gross revenue from deliveries into the state "in the calendar year or the prior calendar year exceeds $100,000" or it made 200 or more separate transactions, and says nothing about the first sale. The Division of Taxation's remote seller guidance supplies the answer: a remote seller "is not required to collect Sales Tax on the transaction that causes" it to meet the threshold, collects on taxable transactions after it, and has "a grace period up to 30 calendar days" to register and begin. Idaho shows the remaining case. Idaho Code section 63-3611(3)(h) reaches a retailer without physical presence whose gross receipts from sales delivered into Idaho exceeded $100,000 "in the previous calendar year or the current calendar year," and neither that statute nor the State Tax Commission's online sellers guide states a start date for a mid-year crossing.

What is owed on the sales in the gap

The gap sales are not untaxed; they are uncollected. In every state above, the purchaser's use tax liability on a taxable purchase exists independently of whether the seller was obligated to collect, and a Massachusetts manufacturer that received $1 million of taxable machinery in March with no tax on the invoice owes Massachusetts use tax on it whether or not the seller was yet a vendor. What the start-date rules settle is the seller's exposure, and they settle it in the seller's favor for the crossing sale and the gap: none of the five states' rules reaches a sale made before the date on which its own statute or regulation says the duty began. The consequence runs the other way as well: tax collected from a purchaser ahead of the obligation was collected without authority, and once collected it is held for the state and must be remitted.

The gap also produces the audit question: the crossing sale is usually the seller's largest transaction with the state, and an auditor's first question is why no tax was charged on it. The answer is the start-date rule, and the defense is the paper that proves the date: the running total by state, the invoice and delivery dates of the crossing sale, and the registration date that follows from them. A seller that crossed in March and began collecting June 1 in Massachusetts has done what the regulation requires; one that crossed in March and registered the following January has a gap the regulation does not excuse.

Practice notes

After the threshold comparison, the start date under each state's own rule determines which invoices carry exposure. For a single-sale crossing, the start date is computed from the delivery date of the crossing sale, and in New York the transaction-count prong is tested before any date matters. The invoices between the crossing sale and the start date are documented as pre-obligation sales, with the running total that supports the date retained in a form an auditor can follow. Where the crossing sale was nontaxable, the registration is still made on the state's schedule, because the states above measure the threshold on gross or total sales, and where the seller is part of a group, the California measure is run on the combined sales of related persons first. And where a seller has been collecting since a date earlier than its obligation required, the over-collected tax is remitted, not retained. G&G State Tax Group provides remote-seller registration timing and economic nexus analysis alongside its state and local tax practice.