SaaS is subject to sales tax in a significant number of U.S. states, and whether a given subscription is taxable depends on the customer's location, how that state classifies remotely accessed software, and, in several states, who the customer is and what else is bundled with the subscription.
There is no federal sales tax and no single national rule. Each state (and, in a few states, individual cities) decides for itself. This guide explains what determines SaaS taxability, how nexus works, how to source a SaaS sale to the right jurisdiction, and what registration and filing involve. For the treatment in each state, use the SaaS sales tax by state reference.
Is SaaS taxable? It depends on the customer's state
Each state applies its own sourcing rules, and for remotely accessed software those rules generally look to where the customer uses the software rather than where your company is incorporated or where your servers sit (the sourcing section below shows how New York, Texas and Pennsylvania each define this).
States classify SaaS in different ways, and the classification drives the answer:
- Prewritten (canned) software, taxed regardless of delivery method. New York treats remotely accessed prewritten software as a taxable sale of tangible personal property (NY Tax Bulletin TB-ST-128). Pennsylvania reaches the same result for canned software accessed remotely by a Pennsylvania user (PA Department of Revenue). Massachusetts does too (830 CMR 64H.1.3).
- An enumerated taxable service. Washington taxes "digital automated services" and remote access software as retail sales (WA Department of Revenue). Texas taxes SaaS as a data processing service, with 20% of the charge exempt by statute (Texas Comptroller Publication 94-127). Kentucky added "prewritten computer software access services" to its taxable services list from January 1, 2023 (KY Department of Revenue).
- Taxable only under conditions. Ohio taxes electronic information and data processing services when used in business, not for personal use (Ohio Department of Taxation). Connecticut taxes business-use SaaS at 1% and personal-use SaaS at the full 6.35% rate (CT DRS SN 2019(8)). Maryland, since July 1, 2025, taxes SaaS at 3% for enterprise use and 6% for individual use (MD Comptroller TB-56).
- Not taxable when nothing tangible is transferred. California does not tax prewritten software transferred by remote telecommunications with no tangible personal property (CDTFA Regulation 1502). Florida takes the same view (Florida DOR TAA 10A-028).
Delaware, Montana, New Hampshire and Oregon have no general sales tax. Alaska has no statewide sales tax, but many Alaska municipalities tax remote sales through the Alaska Remote Seller Sales Tax Commission.
The label matters beyond the state rate. In home-rule states such as Colorado and Illinois, the state may exempt SaaS while individual cities tax it under their own codes. Bundling matters too: when a subscription is sold together with implementation, training or hardware, several states tax the whole charge unless the non-taxable parts are reasonable and separately stated on the invoice.
Not sure how your product is classified where your customers are? Talk to the Taxolio team for a state-by-state taxability review.
Digital goods, SaaS, custom software, and infrastructure are not the same thing
Four categories that states often treat differently:
- Downloaded software or digital goods (a file the customer keeps). Many states tax electronically delivered prewritten software even where they do not tax remote access; Indiana and North Carolina are examples (Indiana SIB #8; NC SUPLR 2021-0005).
- SaaS / remote access (the customer uses software hosted by you and keeps nothing). This is the category the rest of this article is about.
- Custom software built to one customer's specifications is exempt or taxed differently in many states, but the definition is narrow: configuring a prewritten product for a customer does not make it custom, and selling the same build to a second customer generally makes it prewritten (NY TB-ST-128).
- Infrastructure and platform services (compute, storage, hosting) are analysed on their own facts and are frequently treated differently from an application the customer logs into.
If a product provides an API, desktop agent or local client, some states treat that as a transfer of software even when the core service is hosted; Illinois and Michigan both draw this line (Illinois GIL ST 25-0045; Michigan RAB 2023-10).
Nexus: when a state can require you to collect
Nexus is the connection between your business and a state that lets the state require you to register, collect and remit. Taxability and nexus are separate questions: you can have nexus in a state that does not tax SaaS (no tax to collect, but registration or zero returns may still be required), and you can sell taxable SaaS into a state where you have no nexus (no collection obligation yet).
Physical nexus
Offices, inventory, and employees or contractors working in a state generally create nexus there. For a SaaS company the most common trigger is a remote employee. A single engineer working from New York or California can create a registration obligation in that state before any revenue threshold is reached (NY nexus guidance; CDTFA Publication 109).
Economic nexus
Until 2018, states could only require collection from sellers with a physical presence. In South Dakota v. Wayfair, Inc. (June 21, 2018) the U.S. Supreme Court overruled that rule and upheld South Dakota's law requiring remote sellers above $100,000 in sales or 200 transactions to collect. States with a general sales tax have since enacted their own economic nexus laws (each one is listed with its source in the state-by-state reference). The thresholds are set by each state, not by the Court:
- $100,000 in sales into the state during the current or previous calendar year is the most common test.
- Higher dollar thresholds apply in some states: $500,000 in California, New York and Texas; $250,000 in Alabama and Mississippi.
- Transaction-count tests are disappearing. A number of states have repealed their 200-transaction alternative in recent years, including Wisconsin (2021), Maine (2022), South Dakota and Louisiana (2023), Indiana and North Carolina (2024), Utah (2025), Illinois (January 1, 2026) and Kentucky (August 1, 2026). Others, including New Jersey, Ohio, Virginia, Maryland and Georgia, still use one.
- What counts toward the threshold varies. New York's test requires both more than $500,000 of gross receipts and more than 100 sales of tangible personal property over the preceding four sales tax quarters (TSB-M-19(4)S). California counts only sales of tangible personal property, so SaaS revenue does not count toward its $500,000 test (CDTFA Wayfair FAQ). Texas counts total gross revenue, including non-taxable and exempt sales (Texas Comptroller).
State-specific thresholds, lookback periods and effective dates are in the state-by-state reference. For a quick first pass on where you may already have nexus, use the free Nexus Checker.
Sourcing: which jurisdiction's rules apply
For SaaS, the customer's location determines the rules. In practice, states look to where the software is used, which is usually the customer's business address or the addresses of its users:
- New York sources prewritten software to the location from which the purchaser uses it and allows apportionment when users are inside and outside the state (TB-ST-128).
- Texas taxes only the portion of a data processing service used in Texas when the purchaser provides an exemption certificate with a reasonable allocation (Rule 3.330).
- Pennsylvania presumes all users are in Pennsylvania when the billing address is, unless the purchaser documents otherwise (PA DOR).
This is why address-level customer data, not ZIP code alone, is needed: local rates and, in home-rule states, local taxability turn on the exact jurisdiction.
The compliance workflow
Compliance is a sequence, and the order matters.
1) Determine taxability per state
Confirm how each state where you have customers classifies your product, and whether the answer changes with customer type (business vs. individual), bundling, or local rules. Registering before you know the answer leads to collecting tax where none is due, which creates its own refund and customer-relations problems.
2) Identify nexus and register
Once you have nexus, determine whether the state requires registration for your sales profile, and register before collecting any tax (see the U.S. sales tax registration guide, including the steps for non-U.S. companies). Each state sets its own registration deadline tied to when the threshold was crossed (for example, Texas requires a permit by the first day of the fourth month after the month in which the $500,000 threshold was exceeded: Comptroller remote seller guidance). The permit is your authority to charge the tax, and failing to collect when required leaves the tax, interest and penalties with you.
3) Collect at the correct rate and remit on time
Charge the combined state and local rate for the customer's location, apply any partial exemption (such as Texas's 20% exclusion), and file on the frequency the state assigns (monthly, quarterly or annual). Many states require a return for each period once you are registered, even when there are no taxable sales; check each state's filing rules.
4) Keep records that survive an audit
Retain exemption and resale certificates, evidence of customer location, and transaction-level data for at least the state's assessment period. New York's is generally three years from filing, and open-ended where no return was filed (NY Publication 130-D); Texas's is four years (Texas Comptroller). A missing certificate turns an exempt sale into a taxable one under audit.
Exemption certificates and invoicing
Resellers, and in some states government bodies or qualifying non-profits, may buy SaaS without tax if they give you a valid certificate. Verify the certificate before relying on it and store it with the transaction. On invoices, state the SaaS charge separately from implementation, training or support, and show tax as a separate line: several states tax an unitemised bundle in full, and separately stated tax is what customers need to claim refunds or credits.
Registrations, filings and certificate handling across many states is ongoing work. Taxolio's SaaS sales tax service handles nexus review, state registrations and every filing, with a human reviewing each return.
Common SaaS sales tax mistakes
- Applying one classification nationally (for example, "SaaS is a service, services aren't taxed").
- Using headquarters location or ZIP code instead of the customer's full address.
- Missing the month a threshold was crossed, so registration is late and back tax accrues.
- Not filing zero returns after registering, in states that require them.
- Collecting tax on the full invoice where a state exempts part of it (Texas) or taxes only the software line (New York, when services are separately stated).
- Registering in a state that does not tax SaaS and collecting tax that was never due.
International VAT and GST
Selling outside the U.S. adds VAT or GST obligations that follow different rules. The EU taxes B2C digital services where the customer is and lets non-EU suppliers report through the One Stop Shop. Canada requires non-resident digital suppliers to register once relevant supplies exceed CAD 30,000 over 12 months. Australia applies an A$75,000 GST turnover threshold to non-resident suppliers of digital products. The UK has its own VAT framework and should be assessed separately. Taxolio's international service page covers how these fit alongside U.S. compliance.
Frequently asked questions
Is SaaS taxable in the United States?
In some states, yes; in others, no; and in several, only under conditions. Taxability is determined by the customer's state and by how that state classifies remotely accessed software. See the state-by-state reference and the guides for New York, Texas and California.
How did South Dakota v. Wayfair change things for SaaS companies?
Before June 2018 a state could require sales tax collection only from sellers with a physical presence there. Wayfair allowed states to require collection based on economic activity alone, and states with a general sales tax have since adopted economic nexus thresholds of their own (listed by state, with sources, in the state-by-state reference). A SaaS company with no offices outside its home state can now have collection obligations in many states.
What is the difference between selling software and selling SaaS for tax purposes?
Downloaded software is a transfer of a product; SaaS is access to software you continue to host. Some states tax both identically (New York, Pennsylvania), some tax downloads but not remote access (Indiana, North Carolina), and some tax neither (California, Florida). The distinction only helps you if the state you are selling into draws it.
Do local taxes apply to SaaS?
Where a state taxes SaaS, its local taxes usually apply as well, at the rate for the customer's address. In home-rule states, cities may tax SaaS even where the state does not (Colorado and Illinois are the usual examples), so the customer's city matters, not just the state.
How does Taxolio differ from sales tax software?
Sales tax products vary widely. Some focus mainly on calculation at checkout, while others also offer registration, return filing, certificate management and related compliance services. The important distinction is the operating model: software-led workflows still require someone to configure taxability, review exceptions and own the compliance decisions. Taxolio is a managed service with human review rather than a calculation engine, and it can sit alongside whichever engine you use at checkout.
Handling SaaS sales tax without an in-house tax team
Three options exist: build an internal tax function; buy software and run the workflow yourself; or use a managed service (a comparison of the three). With a software-led approach, however much of the workflow the product covers, your team still owns the classification decisions, the exceptions and the response to state notices.
Taxolio provides done-for-you U.S. sales tax compliance for SaaS companies: a nexus and taxability review, state registrations, and ongoing return preparation and filing, each reviewed by a person before submission. Start with the free Nexus Checker or book a call to review where you stand.