How much is the Kansas gas tax?

Kansas charges a state motor fuel excise tax of 24 cents per gallon on gasoline and 26 cents per gallon on diesel. These rates have been stable for years and are added to the federal excise of 18.4 cents (gasoline) and 24.4 cents (diesel) per gallon.

Does the price at the pump include these taxes?

Yes. The Kansas state excise and the federal excise are both baked into the posted pump price. This calculator separates out how many of those dollars are tax so you can see the real cost of driving.

What is the tax per mile?

Tax per mile equals the combined per-gallon tax divided by your vehicle's MPG. A car getting 30 MPG pays the same per gallon as a truck getting 15 MPG, but the truck pays roughly twice as much fuel tax per mile because it burns twice the fuel.

Is sales tax also charged on Kansas gasoline?

No. Motor fuel sold for highway use in Kansas is exempt from the general state sales tax; instead it carries the dedicated motor fuel excise tax this calculator uses. That is why the per-gallon tax is a flat amount rather than a percentage.

Why is diesel taxed at a higher rate than gasoline?

Kansas, like the federal government, sets the diesel excise a couple of cents higher than gasoline. Diesel vehicles tend to be heavier commercial trucks that cause more road wear, so the higher rate helps fund highway maintenance.

Kansas Gas Tax Calculator

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Kansas fuel tax at the pump

Every gallon of gasoline you buy in Kansas carries a flat 24 cents of state motor fuel excise tax, and every gallon of diesel carries 26 cents. On top of that sits the federal excise of 18.4 cents per gallon on gasoline and 24.4 cents on diesel. This calculator adds the two together and projects the total across your fill-ups or your annual driving so you can see exactly how much of your fuel spending is tax.

How it works

The math is simple flat-rate excise, not a percentage of price:

gallons      = (tank size x fills per year)      [tank basis]
             = (annual miles / MPG)              [annual basis]
state tax    = gallons x state rate
federal tax  = gallons x federal rate
total tax    = state tax + federal tax
tax per gal  = state rate + federal rate
tax per mile = tax per gallon / MPG

Because the tax is a fixed amount per gallon, a higher pump price does not increase the tax — only burning more gallons does. That is why a fuel-efficient car pays less total fuel tax per mile even though the per-gallon rate is identical.

Example and notes

Suppose you drive 12,000 miles a year in a car that gets 28 MPG. You burn about 428 gallons. At a combined gasoline rate of 24 + 18.4 = 42.4 cents per gallon, that is roughly $181 in fuel tax a year, or about 1.5 cents per mile. Switch to a 15-MPG pickup over the same miles and the gallons nearly double, pushing fuel tax over $340 a year.

Rates here reflect the long-standing Kansas schedule; the state legislature can adjust them, so confirm the current rate with the Kansas Department of Revenue before relying on this for budgeting.