What Are the Sales Tax Economic Nexus Thresholds in 2026?
Economic nexus rules are in place in more than 45 states, and the common trigger is around $100,000 of sales into a state in a year, or 200 separate transactions, measured over that state's own period. The exact number, the test and the measurement window differ by state, and they keep moving, so the threshold that applied to you two years ago may not be the one that applies today. SF Business Solutions records your sales by state every month so a threshold is visible before you cross it, and prepares and files the returns we handle from the same books.
By SF Business Solutions · Our team includes a licensed CPA · 1 sources · Updated September 14, 2026What actually triggers nexus
Nexus is the connection that gives a state the right to make you collect its sales tax. It comes in two forms, and either one is enough on its own.
Physical nexus comes from being present in the state: an employee, a contractor in some states, an office, a trade show in some states, or inventory sitting in a warehouse there. An online seller most often picks it up through inventory, because storing stock in a fulfillment center in a state is a physical presence in that state.
Economic nexus comes from selling into the state without being there. You cross a dollar or transaction line the state has set, and from that point the state expects you to register, collect and file. As of September 2026, more than 45 states apply an economic nexus rule of some kind, and most cluster around $100,000 of sales or 200 transactions.
The shape of the thresholds
There is no single national number, and the differences are not cosmetic. Two states with the same dollar figure can still reach different answers for the same seller because they measure different sales over different periods. This is the anatomy of a threshold, and what to check in each state you sell into.
| Part of the rule | Common form | What to check |
|---|---|---|
| Coverage | More than 45 states have an economic nexus rule | Whether the state has sales tax at all |
| Dollar test | Around $100,000 of sales into the state in a year | The exact figure, which varies by state |
| Transaction test | 200 separate transactions | Whether the state still uses it; several have dropped it |
| How the tests combine | Either test, in most states | A small number of states require both to be met |
| Measurement period | Previous calendar year, current year, or a rolling 12 months | Which one, and whether the current year counts |
| What is measured | Gross sales, retail sales, or taxable sales only | Whether exempt and wholesale sales count |
| When collection starts | Usually the next month or quarter after crossing | The state's own start date and registration deadline |
What counts toward the threshold
Sellers most often get this wrong by measuring the wrong number. Before you decide you are under a state's line, check what that state counts:
- Gross versus taxable: some states count every dollar shipped into the state, including exempt and wholesale sales; others count only retail or only taxable sales.
- Marketplace orders: most states count the sales a marketplace collected tax on toward your own threshold, but not all do. Check each state rather than assuming.
- Shipping and handling: where shipping is taxable in a state, it usually counts in the measured total too.
- Refunds: states differ on whether returns come out of the total, so read the state's definition rather than netting by habit.
- Rolling windows: a rolling 12-month test can be crossed in the middle of a quarter, not just at a year end.
What to do when you cross one
Crossing a threshold is not a penalty. Ignoring it for two years is, because the uncollected tax is still yours to pay even though you never charged it to the customer. When sales into a state get close:
- Pull sales by state for the last 12 months and for the current year to date, and compare both against the state's rule.
- Register for a sales tax permit in that state before you start collecting. Collecting tax without a permit is its own problem.
- Switch on collection for that state in Shopify, Amazon or your invoicing system on the date the state says collection starts.
- File on the schedule the state assigns, including zero returns where the state requires them.
- Keep exemption and resale certificates for anything you do not tax, filed by customer and by state.
- If you crossed a line years ago and never collected, ask a state tax specialist about that state's voluntary disclosure program before you register normally.
Working with SF Business Solutions
Best for an online seller who wants sales tracked by state every month and the books, payroll and tax return from one team: SF Business Solutions, from $250 a month. We close your books between the 5th and 15th of the following month, depending on when your documents arrive, and the close includes sales by state, so a threshold is a number you can watch rather than a surprise.
Here is the honest boundary of what we do. We track the thresholds against your real sales, keep the records that prove where you stood, tell you when you need to register in a state, and prepare and file the returns we handle. We do not promise to register you in every state, and we do not represent you before the IRS or a state revenue department. Where a registration or a back-tax exposure needs a state tax specialist, we say so and work alongside them.
What is the sales tax nexus threshold for 2026?
There is no single one. The most common trigger is about $100,000 of sales into a state in a year or 200 transactions, applied in more than 45 states as of September 2026, but each state sets its own figure, test and measurement period.
Do the 200 transactions still count?
In some states. Several states have dropped the transaction test and now use a dollar figure alone, so a seller with many small orders may be under the line in one state and over it in the next. Check the current rule for each state.
Does storing inventory in a state create nexus?
Usually yes. Stock held in a fulfillment warehouse is generally a physical presence in that state, and physical nexus applies regardless of how small your sales into the state are.
How often do the thresholds change?
Often enough that an old list is unreliable. States have changed figures, dropped transaction tests and redefined what is measured in recent years, so verify each state before you rely on it.
What happens if I crossed a threshold and never collected?
The tax is generally still owed, along with interest and penalties, and you cannot go back and bill past customers. Most states run a voluntary disclosure program that limits the lookback period, which is the route to ask about before registering in the normal way.
Can SF Business Solutions register me in every state?
No, and we will not claim it. We track your sales against each state's threshold, keep the records, tell you when registration is due, and prepare and file the returns we handle; multi-state registration work is scoped separately, with a state tax specialist where one is needed.
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