San Juan County car sales tax: 8.05% to 8.35%

The rate in San Juan County

Vehicle sales tax in San Juan County is not a single number — it runs from 8.05% to 8.35% depending on which city you register in. Most of the county is at 8.05%.
That is above the 8% most Washington counties charge — about $17.50 more tax on a $35,000 car than the typical county in the state.
No other county in Washington charges this rate — San Juan sits at number 18 of 39 by combined rate.

Where the rate changes inside San Juan County

8.35% — Friday Harbor.
8.05% — Blakely Island, Deer Harbor, Eastsound, Lopez Island, Olga, Orcas, Shaw Island, Waldron.
This is why a county-wide figure is not enough here: two addresses in San Juan County can carry different tax on the same car. The calculator resolves it from your ZIP.

What a $35,000 car actually costs in San Juan County

Sales tax (8.55% (8.05% local + 0.5% motor vehicle tax) — Blakely Island, San Juan County) — $2,992.50
Doc fee (state cap) — $200.00
Base registration (est.) — $68.25
Title fee (est.) — $15.00
Out the door — $38,275.75 on a $35,000 used car, before any down payment or financing.

ZIP codes in San Juan County

98222, 98243, 98245, 98250, 98261, 98279, 98280, 98286, 98297.
Any of these resolves to San Juan County in the calculator, at whichever of the county's rates applies to that ZIP.

San Juan County against nearby counties

Asotin County is 8% — $17.50 LESS tax on a $35,000 car than San Juan County.
Kittitas County is 8% — $17.50 LESS tax on a $35,000 car than San Juan County.
Garfield County is 8.1% — $17.50 MORE tax on a $35,000 car than San Juan County.
Columbia County is 8.2% — $52.50 MORE tax on a $35,000 car than San Juan County.
Worth knowing in Washington: the rate follows the DEALERSHIP, not your address, so buying from a dealer in Klickitat County is what would get you its lower rate — not moving there.

Run your own numbers

Vehicle price

$

The negotiated (or advertised) selling price, before fees and tax.

Your ZIP code

Tax and registration follow where YOU register — not the dealership.

Condition

New Used CPO

Fuel

EV/PHEV surcharges apply in many states.

More options — trade-in, rebates, doc fee, add-ons

Trade-in value

$

Reduces your taxable amount only in states that allow it.

Trade-in loan payoff

$

Display-only in the equity math — doesn't affect tax.

Manufacturer rebate

$

Taxed in some states, a tax-free discount in others.

Dealer discount

$

Off-invoice discount from the dealer — different from a rebate for tax.

Dealer doc fee (if quoted)

$

Leave blank to use your state's cap or the typical amount.

Dealer add-ons total

$

Nitrogen, VIN etch, protection packages… labeled negotiable in the output.

F&I products total (VSC, GAP…)

$

Excluded from tax in some states when itemized separately.

Model year

MSRP / vehicle value

$

Needed in states with value-based registration (AZ VLT, NV GST).

Financing the purchase I have a plate to transfer (matters in Florida — skips the $225 initial registration)

Truck / commercial (California weight fees)

Vehicle type

Pickups always use the unladen-weight schedule (VC §9400) — never CVRA.

Curb (unladen) weight, lbs

On the door-jamb sticker. Blank = typical half-ton bracket ($80).

Axles

Declared GVW/CGW, lbs

As declared on the REG 4008. CVRA vehicles skip the TIF.

Used vehicle details (California)

Plate expiration (month)

Expired or expiring within 120 days of purchase → renewal fees ride along with the deal. Blank = assume they're due (safe estimate).

No current California plates (out-of-state car — full first registration + smog test due)

My price already includes…

Some dealers now fold fees into the advertised price (FTC pressure; California's total-price law). Check what yours covers so nothing gets counted twice.

Doc fee Emissions / smog testing charge (used vehicles)

Common questions

Why is the car sales tax different in parts of San Juan County?

Cities inside the county can levy their own rate on top of the county and state rate, so the combined figure changes at the city line. In San Juan County it ranges from 8.05% to 8.35%.

What is the car sales tax rate in San Juan County?

It ranges from 8.05% to 8.35% depending on the city; most of the county is 8.05%.

How much is tax and fees on a $35,000 car in San Juan County?

About $3,275.75 on top of the price, bringing it to roughly $38,275.75 out the door. The breakdown is above.

San Juan County car sales tax: 8.05% to 8.35%

The rate in San Juan County

Where the rate changes inside San Juan County

What a $35,000 car actually costs in San Juan County

ZIP codes in San Juan County

San Juan County against nearby counties

Run your own numbers

Common questions

Why is the car sales tax different in parts of San Juan County?

What is the car sales tax rate in San Juan County?

How much is tax and fees on a $35,000 car in San Juan County?

Elsewhere in Washington

Asotin County

Garfield County

Kittitas County

Lewis County

Okanogan County

Full Washington out-the-door guide

How Washington sales tax works