Is SaaS Taxable in Texas? The 80% Data Processing Rule, Nexus, and Rates

Yes. Texas taxes SaaS, but only 80% of the charge.

Texas treats software accessed remotely as a taxable data processing service. Texas Tax Code §151.351 exempts 20% of the charge for data processing services, so sales tax applies to the remaining 80% at the 6.25% state rate plus local tax of up to 2%, for a maximum combined rate of 8.25% on the taxable portion (an effective rate of up to 6.6% on the full charge).

Two further points matter for SaaS sellers. First, the Comptroller amended Rule 3.330 effective April 2, 2025, changing how bundles of data processing and other services are analysed. Second, when a customer uses your software in several states, the Texas tax can be limited to the Texas share of use if the customer gives you an exemption certificate with a reasonable allocation.

This guide covers the classification, the 80% rule, the 2025 amendments, multistate allocation, nexus, registration and filing. For the position in other states, see the SaaS sales tax by state reference; for the general framework, see the SaaS sales tax guide.

Why SaaS is a data processing service in Texas

Texas has no SaaS-specific statute. Data processing is one of the enumerated taxable services in Texas Tax Code §151.0101, and Rule 3.330 defines it as "the computerized entry, retrieval, search, compilation, manipulation, or storage of data or information", including the use of a computer or computer time for those purposes. Hosted software that lets customers enter, store, query, modify or export their data fits that definition. The Comptroller's Publication 94-127 explains how the tax is applied to data processing services, including the 20% exemption and the treatment of bundled charges.

Following the 2025 amendments, the analysis looks at what the service provider actually does, not at how the transaction is labelled or what the buyer believes it is buying (Texas Register, March 28, 2025, adopted rules). A subscription described as "platform access", "workflow management" or "analytics" is still data processing if the provider is running computerised storage, retrieval and manipulation of the customer's data.

How the 80% rule works

Texas Tax Code §151.351 exempts 20% of the charge for data processing services. The exemption is statutory and automatic; neither you nor your customer has to claim it. On a $10,000 subscription:

Two billing details that are often wrong:

1. Local tax is also applied to 80%. Both the state and local portions are calculated on the taxable amount, not the full charge.
2. Charging tax on 100% is over-collection. Customers who have been charged tax on the full amount can claim a refund from the Comptroller for up to four years.

Remote sellers with no physical presence in Texas may elect to collect a single local use tax rate of 1.75% instead of tracking the local rate for each customer address.

What changed in Rule 3.330 in April 2025

The Comptroller adopted amendments to Rule 3.330 effective April 2, 2025 (Texas Register, March 28, 2025). The changes that matter for SaaS:

Ancillary services, not "essence of the transaction". The amended rule provides that whether a service is data processing is evaluated on the basis of what the provider does. Where data processing is merely ancillary to a non-taxable service that requires professional judgment or discretion (the rule gives examples such as accounting and legal services), the charge can remain non-taxable. Where the provider is primarily performing computerised data operations, the charge is taxable data processing even if it is sold with support, onboarding or training.

Bundles and the 5% rule. If a single charge covers data processing and unrelated non-taxable services and the taxable portion is 5% or less of the total, the whole charge can be treated as non-taxable. If the taxable portion is more than 5% and the components are not separately stated, the whole charge is taxable (Publication 94-127). Separately stating each component on the invoice lets the 80% rule apply to the data processing line and leaves genuinely non-taxable professional services untaxed.

Marketplace provider services. The amended rule also addresses services provided by marketplace providers, effective October 1, 2025.

The practical instruction is the same as in New York: separately state every line item.

Multistate use: taxing only the Texas share

Rule 3.330 allows a purchaser that uses a data processing service in more than one state to limit Texas tax to the portion of the service used in Texas. The purchaser issues an exemption certificate to the provider stating the percentage of use in Texas, based on a reasonable allocation method supported by its business records. The provider then collects Texas tax on the Texas share only, and the purchaser is responsible for tax on the remainder in the other states where it is due.

Illustration:

A SaaS provider bills a $1,000,000 annual subscription to a retailer with 50 stores in Texas and 50 stores elsewhere, all of which use the software.

Without a certificate: tax applies to the full charge. Taxable amount $1,000,000 × 80% = $800,000; at 8.25% the Texas tax is $66,000.

With a certificate allocating 50% to Texas: Texas share $500,000; taxable amount $500,000 × 80% = $400,000; at 8.25% the Texas tax is $33,000.

The allocation must be reasonable and documented; store count is one method, user count or usage data are others. If your platform serves a customer in more than one state and you have no certificate on file, tell the customer. Enterprise buyers usually complete the paperwork once they see the difference.

Over-collected tax in prior years can be recovered through a refund claim with the Comptroller, by the provider (with customer consent) or by the customer.

Texas nexus: when you have to collect

Economic nexus. A remote seller must obtain a Texas permit once its total Texas revenue in the preceding 12 calendar months exceeds $500,000 (Comptroller remote seller guidance). Total Texas revenue means gross revenue from sales into Texas, including taxable, non-taxable, resale and exempt sales, so all your Texas revenue counts, not just the 80% that is taxable. Texas has no transaction-count test. Once the threshold is exceeded, the permit is due by the first day of the fourth month after the month in which it was exceeded.

Physical nexus. A business with a physical presence in Texas is "engaged in business" there regardless of revenue. For a SaaS company the usual triggers are an office, an employee or representative working in Texas, or property located in Texas. One engineer in Austin creates a Texas registration obligation even if Texas revenue is well under $500,000; the economic threshold only matters for sellers with no physical connection to the state.

Penalties. Tax paid 1–30 days late carries a 5% penalty; more than 30 days late, 10%; a further 10% applies after a determination becomes final. A $50 penalty applies to each late report, and interest accrues from the 61st day after the due date (Comptroller penalties page).

Registration and filing

Register through the Texas Comptroller's online permit application. You will need your federal EIN, business address (or your remote-seller address), NAICS code, an estimate of Texas sales, and bank details for electronic payment. There is no fee for the permit. The Comptroller assigns a filing frequency (monthly, quarterly or annual) based on expected volume; returns are due on the 20th of the month following the period. Keep sales records and exemption certificates for at least four years, which is the Comptroller's assessment period.

If you already have Texas customers

Under $500,000 of total Texas revenue in the last 12 months, no Texas employees, no Texas property. No current obligation. Recheck each quarter.

Over $500,000, registered, charging tax on 100% of invoices. You are over-collecting. Move to the 80% base going forward, document the change, and expect refund requests for prior periods.

Over $500,000, not registered, charging no tax. Your exposure is roughly 80% of Texas revenue × the applicable rate for each period since the threshold was crossed, plus penalties and interest, before any multistate allocation reductions and before excluding customers who could have given exemption certificates. Depending on eligibility and the facts, the Comptroller's voluntary disclosure programme may be worth discussing with a tax adviser.

A Texas employee but few Texas customers. Register. Physical presence creates the obligation from the first taxable sale.

Frequently asked questions

Is SaaS taxable in Texas in 2026?

Yes. SaaS is a taxable data processing service. Tax applies to 80% of the charge at the combined state and local rate for the customer's location, which is capped at 8.25% (Publication 94-127).

What is the Texas sales tax rate on SaaS?

6.25% state plus up to 2% local, applied to 80% of the charge. On the full charge that is an effective rate of up to 6.6%. Remote sellers may elect the 1.75% single local use tax rate instead of address-level local rates.

Do I have to collect Texas tax if I have no office in Texas?

Yes, once your total Texas revenue in the preceding 12 months exceeds $500,000. If you have any physical presence in Texas, including a remote employee, you must register regardless of revenue.

What is a multistate use exemption certificate?

A certificate the purchaser gives the provider stating the percentage of a data processing service used in Texas, based on a reasonable allocation method. The provider collects Texas tax on that percentage only (Rule 3.330).

What changed in April 2025?

The Comptroller amended Rule 3.330 to evaluate data processing on the basis of what the provider does, to set out when data processing is ancillary to a non-taxable professional service, and to address marketplace provider services. The 80% rule for standalone SaaS did not change.

How far back can Texas assess uncollected tax?

Generally four years from the date the tax was due. Where no return was filed, the limitation period does not begin to run.

Texas primary sources used in this guide

• Texas Tax Code §151.0101 – taxable services, including data processing
• Texas Tax Code §151.351 – 20% exemption for data processing services
• 34 Tex. Admin. Code §3.330 – data processing services rule, as amended effective April 2, 2025
• Texas Register, March 28, 2025 – adopted amendments to Rule 3.330
• Comptroller Publication 94-127, Data Processing Services
• Comptroller: Remote Sellers – $500,000 threshold, permit timing, single local use tax rate
• Comptroller: Penalties for Past Due Taxes
• Comptroller: Refunds
• Comptroller: Sales Tax Permit Application

Need your Texas exposure sized?

Taxolio's SaaS sales tax service starts with a nexus and taxability review of your top states, with citations to each state's guidance, followed by registrations and ongoing filings reviewed by a person before submission. Book a call to start with Texas.