EV vs Gas in Seattle: What the Switch Really Costs

Page published October 31, 2026

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The short answer: in Seattle, the EV saves about $8,120 on fuel over 5 years, and about $6,995 after Washington’s EV fees.

Gas at $5.39 a gallon and 30 miles per gallon burns $10,780 over 60,000 miles. Charging at 14.63 cents a kilowatt-hour and 3.3 miles per kilowatt-hour costs about $2,660 over the same miles. Washington’s $225-a-year EV fees take back $1,125 of that gap over 5 years, leaving about $6,995. The 11.05% vehicle sales tax hits both cars on their own prices, so it does not move the fuel gap, and there is no EV incentive to count right now.

Formula

Both cars drive the same miles: 12,000 miles a year for 5 years, 60,000 miles total. The gas car runs 30 miles per gallon, so it burns 2,000 gallons over 60,000 miles, and at $5.39 a gallon (AAA Seattle-Bellevue-Everett metro average, October 31, 2026) that is $10,780 in fuel. The EV runs 3.3 miles per kilowatt-hour, and at 14.63 cents a kilowatt-hour (EIA Washington residential average, August 2026) that is about $2,660 in charging over the same miles. The fuel gap is $10,780 minus $2,660, which is about $8,120.

Washington EV fees take back part of that gap. An EV pays $225 a year above standard registration: a $150 EV renewal fee plus a $75 transportation electrification fee, or $1,125 over 5 years. Gas cars do not pay these two fees. The gap after fees is $8,120 minus $1,125, which is about $6,995 over 5 years.

The 11.05% vehicle sales tax does not move the fuel gap, because it hits both cars on their own prices: 6.5% state plus 0.5% motor-vehicle sales and use tax plus 4.05% local, per Department of Revenue city figures for the third quarter of 2026. The 10.55% figure is the general combined rate; vehicles add the 0.5% motor-vehicle tax on top. A pricier EV pays more tax dollars than a cheaper gas car, which eats into the fuel savings when the EV costs more up front. The yearly RTA transit tax of 1.1% of the car depreciated sticker price applies to gas and electric cars alike, so it does not change this comparison, and Washington caps dealer document fees at $200. No incentive is counted: Washington EV sales and use tax exemption expired July 31, 2025, and the federal $7,500 credit ended September 30, 2025.

Fuel and fees over 5 years, side by side

Line	Gas car	EV
Fuel or charging, 60,000 miles	$10,780	$2,660
Washington EV fees, 5 years	$0	$1,125
Fuel plus fees	$10,780	$3,785

Basis, same for both: 12,000 miles a year for 5 years, 60,000 miles total. Gas car at 30 miles per gallon and $5.39 a gallon (AAA Seattle-Bellevue-Everett metro average, October 31, 2026). EV at 3.3 miles per kilowatt-hour and 14.63 cents a kilowatt-hour (EIA Washington residential average, August 2026). EV fees at $225 a year. This table is fuel and fees only, not full 5-year totals: it leaves out depreciation, insurance, and maintenance, which move with the car you pick, not the fuel you burn. Run your own cars through the calculator for full totals.

The tax both pay: 11.05% on the price

Buying any car in Seattle means paying the vehicle sales tax of 11.05% for the third quarter of 2026, per Department of Revenue city figures: 6.5% state plus 0.5% motor-vehicle sales/use tax plus 4.05% local. The 10.55% figure is the general combined rate; the Department of Revenue calls the motor-vehicle tax an additional tax, so vehicles add the 0.5% on top. Because the tax is a percentage of price, a pricier EV pays more tax dollars than a cheaper gas car, which eats into the fuel savings when the EV costs more up front. Rates vary by exact address, so check the Department of Revenue lookup before you buy.

Seattle drivers also pay the yearly RTA transit tax of 1.1% of the car’s depreciated sticker price, which applies to gas and electric cars alike, so it does not change this comparison. Washington caps dealer document fees at $200.

No incentive to count right now

Do not subtract an EV incentive from a 2026 Seattle purchase. Washington’s EV sales/use tax exemption expired July 31, 2025, and the federal $7,500 credit ended September 30, 2025. The fuel gap above stands on fuel and fees alone, with no incentive in it.

Why Seattle leans electric

Washington ranks second in the U.S. in household EV share at 8.9% (Census 2025 figures), with Seattle city at 11.8% and King County at 13.4%. New-vehicle EV registrations in Washington were 17.5% in the second quarter of 2026, second after California at 21.2%. Cheap, plentiful electricity and expensive gas are the math behind those shares: Washington homes pay about 14.63 cents a kilowatt-hour against a national average near 18 cents, while Seattle gas runs about $1.20 above the national price.

When gas still wins

Three cases flip this comparison. First, price: a much pricier EV pays more in 11.05% tax and loses more value in dollars, which can outweigh years of fuel savings. Second, charging access: a driver without home charging who relies on public fast charging pays more per kilowatt-hour than the home rate used here, and gives back much of the gap. Third, use: heavy towing and frequent long road trips still favor gas for many drivers. The fuel gap is real, but it is not the whole cost, and the purchase price and charging pattern decide whether it survives.

Keep looking

If this page answered one question and raised the next, these follow naturally from it:

How much does a car really cost in Seattle?: the full Seattle example, line by line, with tax, tabs, and the transit tax.
EV vs gas: the national version of this comparison, with the full 5-year example.
EV vs gas calculator: run your own EV and gas cars on your own numbers.
Should you lease or buy an EV: when leasing changes the EV math.
Check your quote: run a real dealer quote against its own numbers before you sign.

Figures: AAA Seattle-Bellevue-Everett metro gas average $5.39 a gallon, October 31, 2026; EIA Washington residential electricity 14.63 cents a kilowatt-hour, August 2026; Washington EV fees $150 plus $75 a year (RCW 46.17.323 and 46.17.324); Seattle vehicle sales tax 11.05%, Department of Revenue city figures, third quarter of 2026; RTA transit tax 1.1%; dealer document fee cap $200; Census 2025 household EV shares; Alliance for Automotive Innovation new-vehicle EV registrations, second quarter of 2026. Gas prices and tax rates move, so treat the dated figures as snapshots and check current rates before you buy.

Educational estimates only, not financial, tax, legal or insurance advice. Every figure on this page is a typical example worked from the inputs stated on the page, not a quote for a specific car, loan, or driver. Your rate, insurance, fuel use, and resale value will move your total. See Terms.

Calculation transparency

Scope. Fuel and fees only, over 5 years in Seattle, on one common basis: 12,000 miles a year, a gas car at 30 miles per gallon and an EV at 3.3 miles per kilowatt-hour. Not full 5-year totals: depreciation, insurance, and maintenance are left out, because they move with the car you pick, not the fuel you burn.

Rules and time period. Gas $5.39 a gallon, AAA Seattle-Bellevue-Everett metro average, October 31, 2026; electricity 14.63 cents a kilowatt-hour, EIA Washington residential average, August 2026; EV fees $225 a year, $150 plus $75; vehicle sales tax 11.05%, Department of Revenue city figures, third quarter of 2026; RTA transit tax 1.1%; dealer document fee cap $200; rates vary by exact address.

Scope and limitations. Educational estimate only. Gas prices and tax rates move, so treat the dated figures as snapshots and check current rates before you buy. A driver without home charging who relies on public fast charging pays more per kilowatt-hour than the home rate used here and gives back much of the gap. Purchase price, charging pattern, towing, and long road trips can flip the comparison. Prices vary by car, shop, and city. Get a written quote for your own car before you decide.

Source links checked November 6, 2026. Figures: AAA Seattle-Bellevue-Everett metro gas average $5.39 a gallon, October 31, 2026; EIA Washington residential electricity 14.63 cents a kilowatt-hour, August 2026; Washington EV fees $150 plus $75 a year (RCW 46.17.323 and 46.17.324); Seattle vehicle sales tax 11.05%, Department of Revenue city figures, third quarter of 2026; RTA transit tax 1.1%; dealer document fee cap $200. The Census 2025 household EV shares and the Alliance for Automotive Innovation second quarter 2026 registration figures are named only, not linked.

Primary sources: AAA fuel prices, Washington; EIA, Electric Power Monthly, Table 5.6.A; Washington Department of Revenue, local sales and use tax rate table; Alternative Fuels Data Center, Washington EV fee; True cost of a car in Seattle; EV vs gas. How the numbers are calculated is written down on the methodology page, and every source is listed on the sources page.

Definitions

Fuel gap. The difference between what the gas car burns and what the EV charges over the same miles. On this page, about $8,120 over 5 years before EV fees, and about $6,995 after them.

Washington EV fees. The $225 a year an EV pays above standard registration: a $150 EV renewal fee plus a $75 transportation electrification fee, or $1,125 over 5 years. Gas cars do not pay these two fees.

Vehicle sales tax. The tax on the purchase price. In Seattle it is 11.05% for the third quarter of 2026: 6.5% state plus 0.5% motor-vehicle sales and use tax plus 4.05% local.

RTA transit tax. The yearly Regional Transit Authority tax of 1.1% of the car depreciated sticker price. It applies to gas and electric cars alike, so it does not change this comparison.

Dealer document fee. The paperwork fee a dealer charges. Washington caps it at $200.

Miles per kilowatt-hour. How far an EV goes on one kilowatt-hour of electricity. On this page, 3.3 miles per kilowatt-hour.

Household EV share. The share of households that already have an EV. On the published figures, Washington is 8.9%, Seattle city is 11.8%, and King County is 13.4%.

Questions people actually ask

How much do fuel and charging cost over 5 years in Seattle?

On the basis on this page, 12,000 miles a year for 5 years, a gas car at 30 miles per gallon and $5.39 a gallon burns $10,780 in fuel, while an EV at 3.3 miles per kilowatt-hour and 14.63 cents a kilowatt-hour charges for about $2,660. The fuel gap is about $8,120.

What EV fees does Washington charge?

Washington charges $225 a year above standard registration for an EV: a $150 EV renewal fee plus a $75 transportation electrification fee, or $1,125 over 5 years. Gas cars do not pay these two fees.

What sales tax does a Seattle car buyer pay?

The Seattle vehicle sales tax rate is 11.05% for the third quarter of 2026, per Department of Revenue city figures: 6.5% state plus 0.5% motor-vehicle sales/use tax plus 4.05% local. The 10.55% figure is the general combined rate; vehicles add the 0.5% motor-vehicle tax on top. Rates vary by exact address, so check the Department of Revenue lookup before you buy.

Is there a Washington EV rebate right now?

No. Washington’s EV sales/use tax exemption expired July 31, 2025, and the federal $7,500 credit ended September 30, 2025. Do not subtract either from a 2026 purchase.

Is Seattle really big on electric cars?

Yes, on the published figures: Washington ranks second in the U.S. in household EV share at 8.9% (Census 2025), Seattle city is 11.8% and King County 13.4%, and new-vehicle EV registrations in Washington were 17.5% in the second quarter of 2026, second after California at 21.2%.