What is the hawaii gas tax 2025 — 16¢/gallon?
In short
Hawaii charges 16¢ per gallon in state gas tax. Drive 15,000 miles a year at 28 MPG and you'll pay around $86/year in state tax alone. Hawaii's 16¢ state rate looks low, but county fuel taxes and the general excise tax push the real per-gallon burden much higher, and it varies by island.
This page shows Hawaii's current state gas tax (16¢/gal) and works out how much state fuel tax you pay from your annual mileage and MPG. A 16¢/gal state fuel tax, plus Hawaii's ~4–4.5% General Excise Tax (GET) on fuel sales, plus substantial county fuel taxes added on top. It excludes the 18.4¢/gal federal excise.
How to use this calculator
- 1Hawaii's 16¢/gal state rate is pre-filled.
- 2Put in your annual mileage.
- 3Enter your vehicle's fuel economy (MPG).
- 4Read your annual gallons used and the Hawaii state gas tax you pay.
The formula
- cents/gallon
- — Hawaii state rate: 16¢ (all-in state-level ≈ 18.5¢)
- 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 Hawaii (16¢/gal).
The result
15,000 ÷ 28 = 536 gallons. State gas tax = 536 × $0.1600 = $86/year. With the federal 18.4¢ that's about $185 of fuel tax for the year.
Common use cases
- Seeing how much of your fuel spending goes to Hawaii gas tax
- Comparing fuel-tax cost between states before relocating
- hawaii is one of the few states that applies its General Excise Tax — a broad gross-receipts tax — on top of the per-gallon fuel tax
- maui County carries among the highest county add-ons in the state
Limitations & assumptions
- The 18.4¢/gal federal gas tax is not included — combined with Hawaii's state rate it's 34.4¢/gal.
- Local add-ons matter here: yes — significant county fuel taxes set by ordinance, roughly 8.8¢ to ~23¢/gal depending on island (Maui among the highest).
- The 16¢ state rate is fixed; county rates are set by ordinance and the GET component effectively scales with the fuel price.
- Use it for budgeting — the tax portion is fixed, the rest of the pump price varies.
Frequently asked questions
What is the gas tax in Hawaii?
How much gas tax do I pay per year in Hawaii?
Is Hawaii's gas tax fixed or does it change?
Are there local gas taxes in Hawaii?
Where does Hawaii'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.