What is the arizona gas tax 2025 — 18¢/gallon?
In short
Arizona's state gas tax is 18¢ per gallon. A driver covering 15,000 miles a year at 28 MPG burns about 536 gallons and pays roughly $96/year in Arizona state gas tax — plus the 18.4¢/gal federal tax. Arizona's 18¢/gal rate is one of the lowest state gas taxes in the country — roughly the 4th-lowest and about 20¢ below the national average — and it's a fixed rate that hasn't kept pace with inflation, so its real value has fallen for years.
This page shows Arizona's current state gas tax (18¢/gal) and works out how much state fuel tax you pay from your annual mileage and MPG. 18¢ motor-vehicle-fuel excise plus a 1¢/gal Underground Storage Tank tax; gasoline is not subject to Arizona's general sales tax. It excludes the 18.4¢/gal federal excise.
How to use this calculator
- 1Arizona's 18¢/gal state rate is pre-filled.
- 2Add the miles you drive per year.
- 3Enter your vehicle's fuel economy (MPG).
- 4Read your annual gallons used and the Arizona state gas tax you pay.
The formula
- cents/gallon
- — Arizona state rate: 18¢ (all-in state-level ≈ 19¢)
- annual gallons
- — Annual miles ÷ MPG
- state tax paid
- — Gallons × state cents ÷ 100
- federal tax
- — 18.4¢/gal — the same in every state
Worked example
The scenario
15,000 miles/year at 28 MPG in Arizona (18¢/gal).
The result
15,000 ÷ 28 = 536 gallons. State gas tax = 536 × $0.1800 = $96/year. With the federal 18.4¢ that's about $195 of fuel tax for the year.
Common use cases
- Seeing how much of your fuel spending goes to Arizona gas tax
- Comparing fuel-tax cost between states before relocating
- heavy 'use class' vehicles such as large trucks pay a higher 26¢/gal rate rather than the 18¢ light-vehicle rate
- gasoline is exempt from Arizona's general sales tax, so the per-gallon excise is essentially the whole state burden
Limitations & assumptions
- The 18.4¢/gal federal gas tax is not included — combined with Arizona's state rate it's 36.4¢/gal.
- Arizona has no local per-gallon gas tax, but 18¢ motor-vehicle-fuel excise plus a 1¢/gal Underground Storage Tank tax; gasoline is not subject to Arizona's general sales tax.
- Rates change: No rate change has been enacted; in 2026 the governor floated a temporary suspension, but the 18¢ rate remains.
- Treat this as a planning estimate — actual pump prices move with crude markets.
Frequently asked questions
What is the gas tax in Arizona?
How much gas tax do I pay per year in Arizona?
Is Arizona's gas tax fixed or does it change?
Are there local gas taxes in Arizona?
Where does Arizona's gas-tax money go?
Disclaimer: KalkWise calculators are provided for general informational and educational purposes only and do not constitute financial, investment, tax, or legal advice. Results are estimates based on the figures you enter and the assumptions described above. Actual outcomes will vary. Consult a qualified professional before making financial decisions.