Texas Franchise Tax: What Multi-State CPAs Get Wrong
The Texas franchise tax, codified in Texas Tax Code Chapter 171, is a margin tax on total revenue minus a cost deduction. It is not an income tax. It does not start with federal taxable income, does not apply IRC deductions, and does not conform to the Internal Revenue Code in any of the ways that income tax states do. Multi-state CPAs who apply their income tax conformity framework to Texas will get the wrong answer, because the franchise tax uses a different starting point, different deduction methods, different apportionment rules, and different thresholds than anything in the IRC.
What the Franchise Tax Actually Taxes
The franchise tax is imposed on "taxable entities" doing business in Texas. That includes corporations, LLCs, partnerships, and most other legal entities. Sole proprietorships and most general partnerships owned entirely by natural persons are exempt.
The tax base is called "margin," defined under Texas Tax Code Section 171.101 as total revenue minus the greater of four deduction options:
- Cost of goods sold (as defined by the Texas Comptroller, not the IRC definition)
- Compensation (wages, benefits, and payroll taxes, capped at $400,000 per employee for the 2025 report year)
- 30% standard deduction (30% of total revenue, no documentation required)
- $0 (the entity can choose to deduct nothing, which only makes sense in specific loss-year scenarios)
The entity picks whichever method produces the largest deduction. The tax rate is 0.375% for qualifying retailers and wholesalers, and 0.75% for all other entities, applied to the computed margin after apportionment.
Two thresholds matter. The no-tax-due threshold for the 2025 report year is $2,470,000 in annualized total revenue. Entities below this threshold owe nothing. The EZ computation threshold is $20 million in total revenue: entities below $20 million can elect to pay 0.331% on total revenue instead of computing margin, which simplifies the return at the cost of a potentially higher tax.
Why IRC Conformity Analysis Does Not Apply
When practitioners work on returns for states like California or New York, the central question is whether the state conforms to the IRC and, if so, as of what date. That question has no meaning for the Texas franchise tax.
The franchise tax does not begin with federal taxable income. It begins with "total revenue," which is defined under Texas Tax Code Section 171.1011 and Comptroller Rule 3.587 as the amount reportable as revenue on the entity's federal return (using the applicable IRS form), minus certain statutory exclusions. The exclusions include items like dividends and interest from federal obligations, insurance proceeds, and certain flowthrough funds.
Federal deductions do not apply. Bonus depreciation under IRC 168(k) is irrelevant because the franchise tax never uses federal depreciation in its base calculation. The Section 199A QBI deduction does not reduce Texas margin because the franchise tax does not start from a number that Section 199A affects. OBBBA's changes to these provisions, which create real compliance work in static and selective conformity states, have no effect on a Texas franchise tax return.
This is a fundamentally different tax. Treating it like an income tax with Texas modifications will produce errors.
The Mistakes Multi-State Practitioners Make Most Often
Mistake 1: Using the Federal COGS Definition
The most expensive error is computing cost of goods sold using the IRC definition instead of the Texas definition. Texas Tax Code Section 171.1012 and Comptroller Rule 3.588 define COGS for franchise tax purposes, and the definition diverges from IRC Section 263A in several places.
Texas COGS includes direct costs of acquiring or producing goods, including materials, direct labor, and certain overhead. But the Texas definition also includes some costs that IRC Section 263A excludes, and excludes some costs that IRC Section 263A capitalizes. A practitioner who copies the COGS figure from the federal return to the franchise tax return will overstate or understate the deduction depending on which direction the differences cut.
The Comptroller's office audits COGS deductions frequently. If the entity chose the COGS method, every line item should trace to the Texas definition, not the federal one.
Mistake 2: Wrong Apportionment Factor
Texas uses single-factor gross receipts apportionment under Texas Tax Code Section 171.106 and Comptroller Rule 3.591. The apportionment fraction is Texas gross receipts divided by total gross receipts everywhere. That is a single-factor sales test.
Multi-state practitioners accustomed to three-factor apportionment (property, payroll, sales) in other states sometimes apply that formula to Texas. Others apply an income-tax-style market-based sourcing analysis without confirming that it matches the Comptroller's sourcing rules for the franchise tax. Texas uses market-based sourcing for services, which aligns with the trend in income tax states, but the sourcing rules for gross receipts of tangible personal property, real property, and other categories are specific to the franchise tax code.
The error typically shows up as an understatement of the Texas apportionment factor when the practitioner applies a three-factor formula that dilutes the Texas numerator with property and payroll in other states.
Mistake 3: Ignoring Threshold Differences
An entity with $2 million in annualized total revenue owes no Texas franchise tax. An entity at $2.5 million owes tax on its full computed margin, not on the excess over $2,470,000. The no-tax-due threshold is a cliff, not a phase-in.
Practitioners sometimes confuse the no-tax-due threshold ($2,470,000) with the EZ computation threshold ($20 million), or apply the wrong rate. The EZ computation rate (0.331%) looks attractive, but it applies to total revenue, not margin. An entity with $15 million in total revenue and $3 million in compensation would pay $49,650 under EZ computation (0.331% of $15M) versus $90,000 under the standard computation (0.75% of ($15M minus $4.5M) times an assumed 100% Texas apportionment). In that example, EZ wins. But an entity with high COGS or compensation relative to revenue might find that standard computation produces a lower tax.
Mistake 4: Confusing Franchise Tax with Texas Sales Tax Obligations
Texas has no individual income tax, but it has both a franchise tax and a sales tax. Clients with sales tax nexus in states like Florida sometimes assume that Texas's sales tax rules mirror those in other states. They do not. The franchise tax and the sales tax are entirely separate obligations with separate filing requirements, separate thresholds, and separate reporting systems. A client can owe franchise tax without having sales tax obligations, and vice versa.
How This Affects Multi-State Engagements
For solo practitioners handling multi-state clients, Texas adds a unique compliance burden. The franchise tax return cannot be prepared as a derivative of the federal return the way an income tax state return can. It requires a ground-up computation using Texas-specific revenue definitions, Texas-specific deduction methods, and Texas-specific apportionment rules.
A client operating in New York, California, and Texas needs three entirely different analytical frameworks: New York's rolling IRC conformity with its PTET election, California's static conformity with separate depreciation schedules, and Texas's margin-based franchise tax that ignores the IRC framework entirely. Each state requires its own research path.
The cost of researching per return escalates with each jurisdiction that uses a non-standard framework. Tax Orator indexes the Texas Tax Code, Comptroller rules, and tax law guidance alongside all 50 states' publications. The Discovery plan includes 10 queries to test with your own franchise tax questions, or the Solo Practitioner plan at $79 per month covers 200 queries for steady multi-state work.