A generous threshold, with real complexity behind it
Selling into Texas? You might think the rules are identical to everywhere else. Texas triggers economic nexus at $500,000 — five times higher than most states. But that generous threshold comes with specific hurdles: SaaS faces an unusual 80/20 taxability split, local rates can push your total burden to 8.25%, and registering for sales tax automatically opens a Franchise Tax account.
The quick version: $500,000 in revenue over any rolling 12-month window triggers nexus. SaaS is 80% taxable. And yes — your sales tax registration opens a second tax account automatically.
This guide covers exactly how Texas calculates economic nexus, what makes its SaaS taxation unique, and how to navigate local tax rates in major cities — plus what the April 2025 expansion of data processing rules means for your business software.
Texas sales tax rate table
| Field | Value |
|---|---|
| State base rate | 6.25% |
| Average combined rate (state + local) | 8.19% |
| Local add-on range | 0% to 2% |
| Maximum possible combined rate | 8.25% |
| Rates vary by county / city | Yes |
| Destination-based or origin-based | Destination-based |
Major cities like Houston, Dallas, and San Antonio reach the 8.25% maximum through combined city, county, transit, and special district taxes. Because Texas uses destination-based sourcing, you must track and apply the correct local rate for each buyer's delivery address — the rate is based on where the package lands, not where it shipped from.
$500,000 — the highest threshold in the country
Once you hit $500,000 in Texas sales over any rolling 12-month period, you need to register and start collecting. There's no transaction count threshold — it's purely revenue-based. This rule took effect October 1, 2019.
- The $500,000 counts all your Texas revenue, not just taxable sales. The lookback is a rolling 12-month window, not a calendar year.
- Sales through marketplace facilitators like Amazon or Etsy count toward your threshold. If the marketplace already collected tax, you won't need to collect it again.
- Once you cross $500,000, you must register by the first day of the fourth month after the month you exceeded it — a few months of runway, but don't wait.
The 80/20 rule — unique to Texas
Texas treats most SaaS and digital products as taxable "data processing services." But there's a twist: 80% of your SaaS charge is taxable, and 20% is automatically exempt by law — for both B2B and B2C sales. Most states tax SaaS at 100% or 0%. Texas splits the difference.
| Product / service | Tax treatment |
|---|---|
| SaaS (B2B and B2C) | 80% taxable |
| Downloaded software (permanent license) | Fully taxable at 6.25% + local |
| Streaming / subscription software access | 80% taxable |
| E-books | Exempt (treated as books) |
| Music & video downloads / streaming | 80% taxable |
| Digital images & fonts | 80% taxable |
| Data processing / information services | 80% taxable |
| Cloud storage / hosting | 80% taxable |
April 2025 expansion: the Comptroller significantly broadened what counts as data processing — now covering payroll software, CRM tools, marketing subscriptions, and most business software involving computerized entry, retrieval, or storage of data. Products you treated as exempt may now fall under the 80/20 rule.
Product taxability in Texas
| Product category | Tax treatment |
|---|---|
| Groceries & unprepared food | Exempt |
| Prepared food & restaurant meals | Taxable at 6.25% + local |
| Candy & soft drinks | Taxable at 6.25% + local |
| Clothing & apparel | Taxable at 6.25% + local — no exemption |
| Footwear | Taxable at 6.25% + local |
| Prescription drugs | Exempt |
| Over-the-counter medications | Exempt |
| Medical devices & durable equipment | Exempt (with prescription) |
| Agricultural inputs | Exempt |
| Manufacturing machinery & equipment | Exempt |
| Raw materials used in manufacturing | Exempt |
| Electricity & gas used in production | Exempt (manufacturing); taxable (general business) |
| Computers & business equipment | Taxable at 6.25% + local |
Notable difference: clothing is fully taxable in Texas with no exemptions or holidays for everyday purchases — unlike New York or Pennsylvania, which exempt clothing under a price cap. If you sell apparel, factor in the full tax; businesses regularly underestimate this and lose margin.
Three annual sales tax holidays
Texas offers three annual sales tax holidays. Retailers cannot opt out of any of them. Layaway sales qualify if final payment is made during the holiday. Bundled items are evaluated individually unless separately stated on the invoice.
Back-to-School Holiday
Third weekend in August (Friday–Sunday). Exempts most clothing, footwear, school supplies, and backpacks priced under $100 per item. Online and mail-order purchases qualify if paid during the weekend.
Emergency Preparation Supplies Holiday
Last full weekend in April. Tiered price caps: portable generators under $3,000; emergency ladders and hurricane shutters under $300; batteries, flashlights, and first aid kits under $75.
Energy Star Holiday
Memorial Day weekend (Saturday–Monday). Exempts Energy Star air conditioners under $6,000 and refrigerators under $2,000, plus WaterSense-labeled products.
Filing and registration
Registration
Sales tax in Texas is administered by the Texas Comptroller of Public Accounts. Register online at comptroller.texas.gov. Registration is free and typically processes within 2 to 3 weeks. When you register for sales tax, Texas automatically opens a Franchise Tax account — a privilege tax calculated on your business margin. You'll need to address both simultaneously.
Filing frequencies
| Frequency | Assigned when… |
|---|---|
| Monthly | Average monthly liability exceeds $1,500 |
| Quarterly | Average monthly liability is $500–$1,500 |
| Annual | Average monthly liability is less than $500 |
Returns and payments are due on the 20th of the month following the reporting period, moving to the next business day if it falls on a weekend or holiday.
Large-filer rules
If your monthly tax liability exceeds $10,000, you must submit a prepayment by the last day of the reporting month, then file the full return by the 20th of the following month.
Penalties and interest
- Late filing: 10% of tax due
- Late payment: 10% of unpaid tax
- Interest: 6.25% annually
Vendor discount: Texas offers a 0.5% timely-filing discount on collected sales tax, capped at $1,500 per period — one of the only states left offering this.
Not sure which of these apply to you?
We map your Texas exposure — the $500k threshold, the 80/20 SaaS split, Franchise Tax — and tell you exactly what to do next.
Not home-rule — but not an SST member either
Texas is not a home-rule state for sales tax — every city, county, and special district operates under state-administered rules. You register once with the Comptroller and file a single return covering state and all local taxes, even though local rates vary widely.
Texas is not a member of the Streamlined Sales Tax agreement and has shown no indication of joining. Remote sellers can't use SST's centralized registration for Texas — you'll register directly with the Comptroller and navigate Texas-specific rules, including the 80/20 SaaS treatment, the $500,000 threshold, and the automatic Franchise Tax account.
Voluntary Disclosure Agreement (VDA)
Texas offers a VDA program administered by the Comptroller, plus a path through the Multistate Tax Commission (MTC).
Lookback & relief
Texas typically limits lookback to 4 years, matching the standard statute of limitations. Without a VDA, lookback can extend indefinitely for unregistered businesses. Penalties are waived entirely; interest is owed in full. The 0.5% timely-filing discount on future returns partially offsets ongoing interest costs.
Eligibility & process
You're ineligible if Texas has already contacted you. Anonymous pre-application is standard — your representative submits financials without revealing your company name. Since sales tax registration auto-opens a Franchise Tax account, your VDA will likely need to address both. Timeline: 90 to 180 days.
Worth pursuing: if you have significant unpaid liability, a VDA saves 10% in waived penalties and caps lookback at four years instead of unlimited exposure.
Audit risk in Texas
The Comptroller's office runs a well-staffed, high-volume audit program with rigorous sampling.
Common audit triggers
- High volume of exempt sales, especially resale certificates
- SaaS or software sales — Texas aggressively enforces the 80/20 rule
- Construction and contractor activity (new construction vs. remodeling)
- Inconsistent filing patterns or sudden revenue drops
- Industry-specific sweeps — retail, manufacturing, and tech are frequent targets
Statute of limitations
Four years for filed returns. If you never registered, the statute stays open indefinitely. As of April 2025, auditors are actively targeting businesses that treated newly-taxable data processing (payroll, CRM, business software) as exempt. Clean "short test" samples are your best defense against full expansion.
Recent changes & quirky rules
Texas is the only state that taxes exactly 80% of SaaS charges, with a built-in 20% exemption. Most states tax 100% or 0%.
Five times higher than most states' $100,000 — one of the most seller-friendly thresholds in the country.
Registering for sales tax automatically opens a Franchise Tax (Margin Tax) account. Most businesses don't realize this until they get a notice.
As of January 1, 2026, Texas eliminated its sales tax exemption for research and development equipment.
Clothing is fully taxable — no price threshold, no back-to-school exemption beyond the tax holiday weekend.
Back-to-school, emergency prep, and Energy Star holidays — retailers cannot opt out of any of them.
Exemptions & resale certificates
Resale certificates
Texas uses Form 01-339, Texas Sales and Use Tax Resale Certificate. The state does not accept the SST Uniform Exemption Certificate — Texas isn't an SST member. Certificates are blanket and don't expire, though sellers should periodically verify buyer information. Keep certificates on file for four years.
Seller liability
If you accept a certificate in good faith and it's later deemed invalid, you're generally protected. Texas auditors scrutinize certificates closely — incomplete forms or purchases unrelated to the buyer's business raise red flags.
Common exemptions
- Resale / wholesale — exempt with valid certificate
- Manufacturing — exempt for items directly used in production
- Agriculture — feed, seed, fertilizer, and farm equipment exempt
- Nonprofits — limited (mostly property-tax focused)
- Government — exempt
- Medical — prescription drugs exempt; medical devices often taxable
Texas also offers direct pay permits for qualified large businesses.
Your next move in Texas
Texas rewards preparation by giving you a high threshold before you have to worry about tax collection. But that runway disappears fast once you're over the line.
- Approaching $500,000? Start tracking now — you have until the first of the fourth month after crossing to register, but early setup prevents scrambling. Remember, registration triggers Franchise Tax obligations too.
- Already collecting? Audit your SaaS and software taxability. The April 2025 expansion means CRM tools, payroll software, and business subscriptions may now fall under the 80/20 rule.
- Have past exposure? The four-year statute only applies if you were registered — unregistered businesses face unlimited lookback. A VDA caps that exposure and waives penalties entirely.
- Selling digital products? Document your 80/20 calculations meticulously with clean invoices separating exempt software from taxable data processing.
The Comptroller's office is thorough and increasingly focused on SaaS enforcement. Getting compliance right protects your business from penalties, interest, and the operational disruption of an audit.
