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Last updated: May 2026 · Oklahoma IFTA rates current for Q1–Q4 2026
Oklahoma · 19.0¢/gal · 2nd Lowest in US

Oklahoma IFTA Calculator 2026 — Diesel Tax Rate & Filing

Oklahoma diesel tax rate is 19.0¢ per gallon for 2026. Calculate your IFTA fuel tax for Oklahoma routes and compare neighboring state rates.

Calculate Your Oklahoma IFTA Tax

Oklahoma IFTA Rates & Trucking Overview 2026

Oklahoma ties Missouri at 29.5¢/gal as the second-lowest diesel rate in the US — only Mississippi (18.4¢) is cheaper. Oklahoma City is at the crossroads of I-40 and I-35, two of the nation's highest-volume freight interstates, making OKC a natural fueling hub. The Will Rogers Turnpike connecting Tulsa to Joplin, MO is toll-based but essential for east-west commerce.

Major Oklahoma Trucking Routes

I-40 (Amarillo TX–Oklahoma City–Fort Smith AR), I-35 (Dallas TX–Oklahoma City–Wichita KS), I-44 (Tulsa–Oklahoma City–Lawton–Texas), I-244 (Tulsa inner loop), Will Rogers Turnpike (I-44, Tulsa–Joplin MO)

Any driver on I-40 or I-35 should top off fuel in Oklahoma. Arkansas to the east (28.5¢) is 9.5¢ more expensive; Kansas to the north (26.0¢) is 7¢ higher; Texas to the south (20.0¢) is nearly identical. Oklahoma's energy sector generates enormous freight: oil field services, pipeline equipment, and refined products move constantly on I-35 and US-81 corridors.

Oklahoma IFTA — Frequently Asked Questions

What is Oklahoma's IFTA diesel tax rate in 2026?
Oklahoma's diesel rate is 29.5¢/gal — tied with Missouri as the second-lowest in the US behind only Mississippi (18.4¢). Fuel in Oklahoma whenever possible, especially before entering Arkansas (28.5¢) or Kansas (26.0¢).
Who administers IFTA for Oklahoma-based carriers?
Oklahoma IFTA is administered by the Oklahoma Tax Commission. File quarterly at oktax.state.ok.us. Oklahoma's low rate makes it an attractive IFTA base state — Oklahoma-based carriers frequently receive IFTA credits from higher-rate states.
What makes Oklahoma City a strategic freight hub?
OKC sits at the exact center of the US at the I-35/I-40 intersection. I-35 is the primary NAFTA corridor north-south; I-40 is the primary east-west Route 66 successor. Fuel, food, and rest facilities cluster around OKC exits. Distribution center growth has been rapid in the past decade.
Does Oklahoma have turnpike tolls affecting trucking costs?
Yes. Oklahoma has an extensive turnpike system including the Will Rogers (I-44 Tulsa–Joplin), Turner (I-44 OKC–Tulsa), and several others. PlatePay and PIKEPASS are the primary payment methods. Toll costs are separate from IFTA and add to operating costs on Oklahoma toll corridors.
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Oklahoma Quick Reference

Oklahoma diesel tax 2026→19.0¢/gal
Fuel strategy→✅ Fuel here
Texas 20.0 ≈→¢
Kansas→26.0¢ ↑
Arkansas→28.5¢ ↑
Missouri→29.5¢ ≈

Fueling tip: Oklahoma at 19.0¢ is the second-cheapest state in the US. Fuel here every chance you get. Arkansas (28.5¢) and Kansas (26.0¢) are both significantly more expensive.

Need full IFTA across all 48 states? Use the IFTA Fuel Tax Calculator.

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