The State Tax Competitiveness Index is an annual Tax Foundation ranking that scores all 50 states on how well their tax codes are structured, from 1 (best) to 50 (worst). Published since 2003 and renamed in 2025 from the State Business Tax Climate Index, it measures structural design rather than how much revenue a state collects or whether its budget balances.1Tax Foundation. 2026 State Tax Competitiveness Index (PDF) States score well when their codes are simple, neutral toward business decisions, and pair broad tax bases with low rates.
The Five Components Scored
Every state is evaluated across five categories, each split into two equally weighted sub-indices that measure tax rates and tax bases separately.2Tax Foundation. 2026 State Tax Competitiveness Index A low rate on a badly designed base won’t rescue a state’s score, and neither will the reverse.
Individual Income Tax
The largest component. It captures the burden on wage earners as well as sole proprietors, partnerships, and S corporations whose business income flows through personal returns. Flat-rate systems score better than multi-bracket ones, high top marginal rates are penalized, and states lose ground if their brackets aren’t indexed for inflation.
Corporate Tax
Top marginal rates, base design, and credit availability all factor in. States with generous carryforward periods for net operating losses score better because businesses with uneven earnings aren’t penalized for a bad year. Gross receipts taxes are flagged because they tax total revenue at every stage of production, which causes tax pyramiding: the same product gets taxed repeatedly through the supply chain, pushing the effective rate well above the statutory one and hitting low-margin businesses hardest.3Tax Foundation. Tax Pyramiding: The Economic Consequences of Gross Receipts Taxes Nevada, Ohio, Texas, and Washington impose gross receipts taxes instead of a corporate income tax; Delaware, Oregon, and Tennessee levy them on top of one.4Tax Foundation. State Corporate Income Tax Rates and Brackets
Sales and Excise Taxes
A well-designed sales tax hits final consumer purchases, not transactions between businesses. When states tax business inputs like raw materials or equipment, those costs get built into retail prices and create the same pyramiding problem. Bases matter too: states that exempt digital downloads, streaming subscriptions, and software while taxing physical goods draw arbitrary lines that narrow the base and push rates higher on everything left.
Property and Wealth Taxes
This goes beyond real estate. It covers taxes on business equipment, inventories, capital stock, estates, and inheritances. States that tax tangible personal property such as machinery and inventory lose points because those levies directly raise the cost of expansion. Estate and inheritance taxes with high rates or low exemption thresholds also hurt.
Unemployment Insurance Taxes
Every state levies these on employers, but rate structures and taxable wage bases vary widely. The taxable wage base runs from $7,000 in several states to over $60,000 in others, meaning the same employee costs much more to insure in some places than others. The index looks at minimum and maximum rates and at how each state’s experience rating system assigns rates based on an employer’s layoff history.
How the Scores and Rankings Are Built
Each state gets a score between 0 and 10 on every component, where 0 is worst among the 50 states and 10 is best. These are relative scores. A state’s score can shift even if its own laws don’t change, simply because another state reformed and moved the curve.2Tax Foundation. 2026 State Tax Competitiveness Index
The five component scores feed into a weighted average that produces the overall ranking. The weights reflect how much variation exists between states in each category, so the components where states diverge most carry the most influence:
- Individual income taxes: 31.8%
- Sales and excise taxes: 21.2%
- Corporate taxes: 21.1%
- Property and wealth taxes: 14.5%
- Unemployment insurance taxes: 11.4%
Individual income taxes dominate because state approaches range from no income tax at all to double-digit top rates with a dozen brackets. Unemployment insurance carries the least weight because the spread between states is narrower.2Tax Foundation. 2026 State Tax Competitiveness Index
What Pushes a State Up the Rankings
Three structural traits drive high scores: neutrality, simplicity, and broad bases paired with low rates. Neutrality means the code doesn’t steer business decisions. Targeted credits meant to lure specific industries get penalized because they shift the burden onto everyone else and distort where capital flows.
Simplicity matters because compliance costs real money, especially for small businesses without in-house tax staff. States with many local jurisdictions setting their own rates, or with separate taxes on niche items, pile up compliance burdens that fall unevenly.
The broad-base, low-rate combination is the index’s gold standard. When large chunks of activity are exempted, the state has to charge more on whatever remains. Higher rates then invite more lobbying for more exemptions, narrowing the base further. Wider bases sustain lower rates and reduce the incentive to game the system.
2026 Top and Bottom States
The 2026 top 10 are Wyoming, South Dakota, New Hampshire, Alaska, Florida, Montana, Texas, Tennessee, Idaho, and Indiana.2Tax Foundation. 2026 State Tax Competitiveness Index
The common thread at the top is the absence of at least one major tax. South Dakota and Wyoming have no corporate or individual income tax. Alaska has no individual income tax and no state-level sales tax. Florida and Tennessee have no individual income tax. New Hampshire and Montana have no sales tax. Eliminating an entire tax category removes a large source of complexity and distortion, which keeps these states near the top year after year.
The bottom 10 runs Vermont (42), Massachusetts, Minnesota, Washington, Maryland, Connecticut, California, New Jersey, and New York at 50. New York has held last place for years. These states share high marginal rates, complex bracket structures, significant property taxes, and in many cases estate or inheritance taxes on top. New Jersey and California both impose some of the highest individual income tax rates in the country alongside substantial corporate taxes.5Tax Foundation. 2026 State Tax Competitiveness Index Interactive Tool
Recent Reforms Moving the Rankings
A wave of states have adopted flat individual income taxes since 2021: Arizona, Iowa, Mississippi, Georgia, and Idaho in 2021 or 2022, Louisiana in 2024, and Kansas and Ohio in 2025.6Tax Foundation. The State Flat Tax Revolution: Where Things Stand Today Mississippi went further, passing legislation to phase its income tax rate down to 3% by 2030 and eventually eliminate the tax entirely.
Several of those reforms produced visible ranking changes in the 2026 edition. Louisiana jumped six spots after adopting a 3% flat individual income tax, a 5.5% corporate rate, and permanent full expensing. Georgia climbed from 23rd to 18th as its individual and corporate rates phased down to 5.19%. Idaho moved from 11th to 9th after cutting its flat rate to 5.3%, and Iowa rose from 19th to 17th with its new flat 3.8% individual rate.2Tax Foundation. 2026 State Tax Competitiveness Index
Movement runs both directions. Washington imposed a new 9.9% capital gains tax rate and raised its top estate tax rate from 20% to 35%, dropping it on the individual income tax component. Maryland’s broader tax increases dropped it to 46th. Delaware slid four spots to 24th without raising taxes, simply because other states reformed while it stayed still.2Tax Foundation. 2026 State Tax Competitiveness Index In a relative ranking, standing still means falling behind.
What the Index Doesn’t Measure
The index is a structural measure, not a full picture. It says nothing about what a state’s taxes pay for. Businesses consistently rank workforce quality, transportation access, and education among their top location factors, and all of those depend on state revenue. A state with strong public schools, modern highways, and reliable infrastructure may attract employers despite higher rates, because those investments cut private costs.
The research on whether lower state taxes actually drive economic growth is mixed. Some studies find small positive effects on job creation. Others find no significant relationship. One line of research has found that tax increases only slow growth when the revenue funds transfer payments, and that revenue directed to education, highways, or public safety can produce better outcomes than low taxes paired with underinvestment.
The index also doesn’t track overall tax burden in dollar terms. A state can score well with a clean structure even when its remaining taxes are relatively high, and it can score poorly despite a low overall burden if its code is complex. And because individual income taxes account for nearly a third of the total score, states without one carry a large built-in advantage. Whether that reflects genuine competitiveness or the structural benefit of resource wealth and low population density is worth weighing when you use the ranking to compare states.