SaaS Sales Tax USA: 2026 Guide for Founders

SaaS Sales Tax in the USA: The 2026 Guide for Founders Who Don't Want to Lose Sleep

If you sell SaaS to US customers, the IRS isn't your problem. 46 state revenue departments are.

Each one decides on its own whether your subscription is taxable, what counts as "nexus", how often you file, and what happens if you don't. Miss the rules in one state and you can owe back-tax going back years, plus penalties that don't care that you're a 3-person team in Lisbon.

This guide is the version we wish someone handed us before our first US customer. What's taxable, where you owe, how to register, how to file, and the one decision that makes 90% of this disappear.

The short version

US sales tax on SaaS in 2026 looks like this:

• About 25 states tax SaaS as a "specified digital good" or "electronically delivered software". The list shifts every legislative session.
• You owe sales tax in a state once you cross its economic nexus threshold, typically $100k in sales or 200 transactions in a calendar year. Some states (California, Texas) only use the dollar threshold. A few are higher ($500k in New York and California). [Source: state revenue departments, current as of Q2 2026.]
• No federal sales tax exists. You register state by state, file state by state, remit state by state.
• Stripe does not handle this for you. Stripe Tax calculates. You're still the merchant of record, you still register, you still file, you still owe.
• A merchant of record (MoR) does handle it for you. That's the loophole. More on that in a minute.

What states actually tax SaaS

The taxability map is messy. Roughly:

SaaS taxable in most cases: New York, Texas, Pennsylvania, Washington, Massachusetts, Ohio, Connecticut, Arizona, Iowa, Tennessee, Utah, South Dakota, West Virginia, Hawaii, New Mexico, South Carolina, Rhode Island, Mississippi, Maryland, Vermont, Kentucky, Alabama, Louisiana, Indiana, Wisconsin.

SaaS generally not taxable: California, Florida, Illinois, Georgia, North Carolina, Virginia, Colorado, Missouri, Minnesota, New Jersey (with carve-outs).

No state sales tax at all: Alaska, Delaware, Montana, New Hampshire, Oregon. (Alaska has local sales tax in some boroughs, so don't relax fully.)

Treat any single-source list (this one included) as a starting point. Statutes change, departments of revenue publish letter rulings that flip a position, and bundling matters. New Jersey is taxable if your SaaS is for personal use, not taxable if it's for business use. Texas taxes SaaS at 80% of the sale price because they treat 20% as a non-taxable data-processing service. Connecticut taxes business SaaS at a reduced 1% rate. The detail is where founders get cooked.

Economic nexus, the thing that triggers everything

Before South Dakota v. Wayfair (2018), you only owed sales tax in a state where you had physical presence. Wayfair killed that. Now most states use economic nexus: cross a threshold in their state, you owe.

The standard threshold most states adopted:

• $100k in gross sales into the state in a calendar year, OR
• 200 separate transactions into the state in a calendar year.

Outliers to know:

• California, Texas, New York: $500k. (No transaction count.)
• Tennessee: $100k. (No transaction count.)
• Kansas: $0. Yes, zero. One sale to a Kansas customer creates nexus.

The "200 transactions" rule is a trap for SaaS. If you sell a $5/month subscription to 200 different customers in Illinois, you crossed the threshold at $12,000 of revenue. You now owe.

Once you cross the threshold, most states give you 30 to 60 days to register. After that, you accrue penalties from the day you should have started collecting.

How registering and filing actually works

Per state, you:

1. Apply for a sales tax permit on the state's department of revenue site. Free in most states, $20 to $100 in a few.
2. Get a permit number and a filing frequency (monthly, quarterly, or annual based on volume).
3. Set up your billing system to collect the right rate at checkout. Rates vary by ZIP code in destination-based states.
4. Remit collected tax on the schedule the state assigned you. Late filing is a flat penalty plus interest. Even a $0 return must be filed if you have a permit.
5. Renew the permit on the state's schedule.

Do this for every state where you have nexus. By the time you hit $5M ARR with US distribution, you're probably filing in 30+ states. A typical mid-size SaaS spends 40 to 80 hours a month on compliance, plus $1k to $5k a month on tools (Avalara, TaxJar, Anrok) and accountants.

The merchant of record shortcut

A merchant of record (MoR) is the legal seller of your product. The customer's receipt has the MoR's name on it. The MoR collects the payment, takes on the sales tax obligation, files in every state, and remits.

You sell your software. They sell the transaction.

What that gets you:

• One legal entity holds every state permit, not you. You don't register anywhere.
• The MoR's nexus, not yours. Their thresholds are crossed for you on day one because they're processing thousands of transactions a month.
• Every state's filing is their job. You don't see the forms.
• Audit risk transfers. If California audits the transactions, they audit the MoR.
• One global revenue line in your books, not 46 reconciliations.

The tradeoff: the MoR takes a transaction fee, typically 4 to 9% all-in (processing + tax + payout). Stripe alone is 2.9% + 30¢. So an MoR runs roughly 2 to 6 percentage points more than raw Stripe.

For an indie SaaS doing $500k ARR with US customers, that's $10k to $30k a year extra in fees. Compared to $40k to $80k a year in tax tools + accountant time + the constant low-grade panic of "did I miss a state?", it's usually the right trade. For a US-based founder selling B2B at high ACVs, doing it yourself with Anrok or TaxJar can pencil. Depends on your team's appetite for paperwork.

CREEM is a merchant of record built for AI builders, indie hackers, and SaaS teams shipping in public. We handle US sales tax, EU VAT, UK VAT, and a stack of other jurisdictions so you don't have to. See pricing.

What Stripe actually does (and doesn't)

Stripe gets named in every sales tax conversation, so worth being precise:

• Stripe Tax calculates the right rate at checkout, given your nexus settings.
• Stripe Tax can register you in states via their partnership network.
• Stripe does not file your returns. You or your accountant do.
• Stripe does not remit on your behalf. You wire the state directly.
• You are the merchant of record. Your name is on the receipt. Your EIN is on the permit.

Stripe Tax is a useful calculator and a decent registration assistant. It is not a compliance product. The IRS, state auditors, and your bookkeeper all still talk to you.

For a deeper comparison: is Stripe a merchant of record?

The specific things that bite indie SaaS founders

A short list of pitfalls we see weekly in support tickets:

1. Trailing 12 months vs calendar year. Most states measure nexus on a calendar year. A few (Alabama, Arkansas) use trailing 12 months. Set a quarterly reminder to check both.
2. Free trials count. $0 transactions count toward the 200-transaction threshold in some states. Texas explicitly excludes them. New York includes them.
3. Marketplace facilitator laws. If you sell through the Apple App Store or Google Play, those marketplaces handle tax on the consumer transaction. Your own direct sales still need separate compliance.
4. B2B exemption certificates. A business customer with a resale certificate is exempt. You need to collect, validate, and store the certificate. If you don't, the state assumes the sale was taxable and bills you.
5. Bundling. If your SaaS subscription includes a hardware peripheral or a professional service, the bundle rules in each state determine what's taxable. Get this wrong and the auditor unwinds the whole subscription as taxable.
6. Backfile risk. When you finally register in a state you've been selling into for two years, the registration form asks how long you've had nexus. Lie and it's fraud. Tell the truth and they bill back-tax + interest + penalties.

FAQ

Do I need to collect sales tax on my SaaS if I'm based outside the US?

Yes, if you cross economic nexus in a US state. Your home country doesn't shield you. South Dakota v. Wayfair specifically enables states to enforce against foreign sellers. The UK, EU, Canada, and Australia all have reciprocal arrangements that make enforcement plausible.

At what revenue should I worry about US sales tax?

The moment you have one customer in Kansas or are approaching $100k in any other state. For most SaaS founders, that's between $30k and $80k MRR depending on customer mix. Don't wait until you cross thresholds to think about it. Pick a path (DIY with TaxJar/Anrok, or MoR) before you cross any state line.

What's the penalty for not collecting sales tax I owed?

State by state, but typically: the uncollected tax (you pay out of pocket, since the customer is long gone), plus 5% to 25% in penalties, plus interest at 6% to 12% a year, plus possible personal liability for officers. Some states will lien your business bank account.

Can I just not sell to US customers?

You can geo-block, yes. About 12% of indie SaaS teams we onboard explicitly chose to skip US distribution for sales-tax reasons. It's a legitimate strategy and you'd be giving up roughly 60 to 70% of the SaaS market. For most, the math doesn't work; for a few it absolutely does.

Is a merchant of record the same as a payment processor?

No. A payment processor (Stripe, Adyen, Braintree) moves money. A merchant of record (CREEM, Paddle, LemonSqueezy, FastSpring) is the legal seller. The MoR uses a payment processor under the hood. The difference is whose name is on the receipt and whose problem the tax is.

Where can I read the official state-level rules?

Start at the Streamlined Sales Tax Governing Board for the 24 states in that compact, then go state by state from each department of revenue site. The SST taxability matrix is the closest thing to a canonical reference for SaaS treatment.

Stop reading. Pick a path.

Two valid paths:

1. Do it yourself. Pick TaxJar, Anrok, or Avalara. Register in every state as you cross thresholds. File monthly or quarterly. Budget 4 to 10 hours a month of founder or finance time. Realistic if you're US-based, B2B-heavy, and your team likes spreadsheets.
2. Offload to a merchant of record. Sign up for CREEM, replace Stripe checkout with our hosted checkout in one afternoon, and never think about US sales tax again. Realistic if you're a small team, indie / international / AI-native, and would rather ship product than file forms.

If you're shipping AI tools, monetizing in public, or building a small SaaS without a finance hire, path 2 was built for you. Read the docs.