Why does the same car cost so much more to register on Oahu than on the Big Island?

County weight tax. Honolulu charges 7.0 cents per pound on passenger vehicles and Hawaii County charges 1.25 cents, both set by county ordinance rather than by the state. On a 4,000-pound vehicle that is $280 versus $50 in county weight tax alone. Every other line, including the $46 state registration fee and the state weight tax bracket, is identical across all four counties.

What is the 4.712% my Hawaii dealer charged me?

General Excise Tax passed on to you. GET is levied on the dealer's gross income at 4% state plus a 0.5% county surcharge, and because the amount collected from you counts as gross income too, the published grossed-up rate that fully recovers a 4.5% liability is 4.712%. It functions like a sales tax on the invoice but is legally the dealer's obligation, which is why it allows no trade-in credit.

Do I owe tax buying a car from a private seller in Hawaii?

Generally nothing. GET applies only to business activity, and an individual selling their own vehicle is not conducting business, so no GET and no use tax is due whatever the price. File Form G-27, the Motor Vehicle Use Tax Certification, at the county registration window to document the casual-sale exemption. Without it the clerk can default to assessing tax on the vehicle's fair market value.

What do I owe on a car shipped over from the mainland?

Use tax at 4.5% of the landed value, which is the purchase price plus shipping, insurance and handling to get the vehicle to a Hawaii port. Sales or use tax already paid to another state credits against it dollar for dollar. This applies to new residents bringing a car and to anyone buying on the mainland to import, and it is separate from registration and weight tax.

Do electric vehicles pay less to register in Hawaii?

They pay more. An EV owes a $50 annual state road-use surcharge on top of the same registration fees and weight tax as every other vehicle, or $0.008 per mile under the optional mileage program phased in from July 1, 2025. In Maui County an EV also pays a $100 county EV fee, and Maui charges hybrids a separate $50. Weight tax is unaffected by fuel type.

Can I renew my Hawaii registration without a safety inspection?

No. All four counties check for a current inspection before the renewal will process, whether it is done online, at a kiosk or at the counter. The inspection is annual and costs $25.75 for cars and trucks and $17.75 for motorcycles and trailers, at rates effective July 1, 2025. It is obtained at a licensed inspection station, not at the registration office.

Hawaii vehicle taxes & fees

There is no state DMV here. Four county councils each set their own per-pound weight tax, so the same car costs $230 more a year to register on Oahu than on the Big Island.

verified July 2026your county motor vehicle registration office (Honolulu, Maui, Hawaiʻi, or Kauaʻi)

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Every Hawaii vehicle cost

Each one runs Hawaii's own rates and rules - not a national average.

Buying
Tax, Title & License
The full out-the-door cost of buying a car: sales tax, title fee, registration, and every state add-on in one total.
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Boats
Boat Registration
Boat and vessel registration costs by length and type, plus titling fees and where to register (it's often not the DMV).
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Changing owner
Title Transfer
Title transfer fees, deadlines, and the late penalties that stack up if you miss them - with a penalty calculator.
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Changing owner
Gift a Car
What it costs to gift a vehicle to a family member - who qualifies, which taxes are waived, and the forms you need.
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Buying
Car Sales Tax
Exactly how much sales tax you'll pay on a new or used vehicle - including trade-in credits and private-party rules.
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Buying
Registration Fees
First-time registration costs by vehicle type - cars, trucks, trailers - with county fees and EV surcharges included.
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Every year
Renewal Cost
What your annual registration renewal actually costs, what's included, and what happens if you renew late.
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Motorcycles
Motorcycle Fees
Motorcycle registration, title, and tax costs - usually cheaper than a car, but with their own quirks by state.
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Against the other 50

#16 of 51 counting up from the cheapest

Oregon $242.00Washington $3,487.25

Tax, title and first registration on the same $30,000 car in every state. Hawaii comes to $1,847.60, $190.52 below the $2,038.13 median.

How Hawaii charges

What you actually pay, and to whom

In short

Hawaii runs vehicle registration through four county offices rather than a state agency: the City and County of Honolulu, Hawaii County, Maui County and Kauai County. The state sets a uniform base of $46 in registration under HRS section 249-31, a $7 highway beautification fee and a $0.50 emblem fee, plus a weight tax on a shared bracket schedule in HRS section 249-33. Each county then adds its own registration fee, its own emblem fee and, decisively, its own weight tax rate set by ordinance. The county collects the whole bill.

The county weight tax is where the money is, and it is not a rounding difference. Honolulu charges 7.0 cents per pound on a passenger vehicle. Hawaii County charges 1.25 cents. The other surprise is the purchase tax, which is not a sales tax at all: Hawaii levies the General Excise Tax on a business's gross income, so a dealer sale carries a 4.712% pass-on but a genuine private sale between two individuals owes nothing, at any price, as long as Form G-27 is filed at the counter.

Four counties, four weight tax rates, one $12 floor

Honolulu Revised Ordinances section 41-17.1 sets the Oahu passenger rate at 7.0 cents per pound, and 7.5 cents commercial. Maui County Code section 3.24.030 sets 3.5 cents passenger and 5.36 cents commercial. Kauai County Code section 5-2.3 sets 2.0 cents and 3.0 cents. Hawaii County Code sections 24-17 and 24-18 set 1.25 cents and 2.5 cents, the lowest in the state. On a 4,000-pound crossover that is $280 of county weight tax on Oahu, $140 on Maui, $80 on Kauai and $50 in Hawaii County. All four ordinances set a $12 minimum, which is where most motorcycles land rather than at a calculated per-pound figure.

The state share, the brackets, and the EV surcharge

State weight tax under HRS section 249-33 runs 1.75 cents per pound up to 4,000 pounds, 2.00 cents from 4,001 to 7,000, 2.25 cents from 7,001 to 10,000, and a flat $300 above 10,000 pounds. Add the flat $53.50 in state fees and $20.50 in county fees, and a 4,000-pound car costs $424 a year on Oahu against $194 in Hawaii County. Electric and alternative-fuel vehicles owe a $50 state road-use surcharge, or an optional $0.008 per mile under the program phased in from July 1, 2025. Maui County alone stacks a further $100 EV fee and a $50 hybrid fee on top.

The 4.712% on a dealer invoice is not sales tax

The General Excise Tax is levied on the dealer's gross income at 4% state plus a 0.5% county surcharge. Dealers may pass it on, and because the money they collect from you is itself part of their taxable gross income, the Department of Taxation publishes 4.712% as the maximum grossed-up rate that fully recovers a 4.5% liability. On a $30,000 car that is $1,413.60. Because the base is gross income rather than a sale price, there is no trade-in credit anywhere in the calculation. A vehicle bought on the mainland and shipped in owes use tax at 4.5% of landed value, meaning price plus freight, insurance and handling to the port.

A casual sale between two individuals is not taxed at all

GET only reaches business activity, and an individual selling their own car is not in business for that transaction. A private-party purchase therefore owes no GET and no use tax regardless of price, which is the single largest cost difference between buying from a dealer and buying from a neighbor here. The documentation matters: Form G-27, the Motor Vehicle Use Tax Certification, is filed at the county window to record why nothing is owed. Without it the clerk can assess tax on the vehicle's fair market value instead. A genuine gift uses Form G-27A and carries no relationship test at all.

Thirty days to transfer, and the inspection gates everything

A buyer has 30 calendar days from the sale to bring the endorsed title to the county, extended to 60 days when the recorded lienholder has no Hawaii office. Past the window the county assesses a flat $50 late-transfer penalty and bills the registration and weight tax that went unpaid while the vehicle sat in the seller's name, which on Oahu is the larger of the two numbers. The ownership transfer fee itself is small and county-set: $5 in Hawaii County, about $10 in Honolulu and Kauai, $20 in Maui. Separately, no registration or renewal processes without a current annual safety inspection, $25.75 for cars and trucks and $17.75 for motorcycles and trailers since July 1, 2025.

What moves the number

Four things that change a Hawaii bill

Private sales carry no tax
A person-to-person sale owes $0 in GET and $0 in use tax at any price, because the General Excise Tax reaches only business activity. Filing Form G-27 at registration is what secures it. On a $30,000 car that is $1,413.60 the dealer buyer pays and the private buyer does not.
No trade-in credit exists
GET is computed on the dealer's gross income from the deal, not on a net sale price, so a trade-in allowance does not reduce the 4.712% base. A buyer trading in a $15,000 car against a $40,000 purchase still sees the pass-on calculated on the full $40,000.
Maui charges electric vehicles twice
An EV registered in Maui County pays the $50 state road-use surcharge and a further $100 county EV fee, for $150 a year before weight tax. Maui is also the only county with a hybrid-specific fee, at $50. The other three counties add nothing beyond the state $50.
Weight tax follows the island you live on
Registration happens in the recipient's county at that county's rate. A car handed from a Hawaii County parent to an Oahu child moves from 1.25 cents per pound to 7.0 cents, turning $50 of annual county weight tax on a 4,000-pound vehicle into $280.

Questions

Hawaii fees, answered

Why does the same car cost so much more to register on Oahu than on the Big Island?: County weight tax. Honolulu charges 7.0 cents per pound on passenger vehicles and Hawaii County charges 1.25 cents, both set by county ordinance rather than by the state. On a 4,000-pound vehicle that is $280 versus $50 in county weight tax alone. Every other line, including the $46 state registration fee and the state weight tax bracket, is identical across all four counties.
What is the 4.712% my Hawaii dealer charged me?: General Excise Tax passed on to you. GET is levied on the dealer's gross income at 4% state plus a 0.5% county surcharge, and because the amount collected from you counts as gross income too, the published grossed-up rate that fully recovers a 4.5% liability is 4.712%. It functions like a sales tax on the invoice but is legally the dealer's obligation, which is why it allows no trade-in credit.
Do I owe tax buying a car from a private seller in Hawaii?: Generally nothing. GET applies only to business activity, and an individual selling their own vehicle is not conducting business, so no GET and no use tax is due whatever the price. File Form G-27, the Motor Vehicle Use Tax Certification, at the county registration window to document the casual-sale exemption. Without it the clerk can default to assessing tax on the vehicle's fair market value.
What do I owe on a car shipped over from the mainland?: Use tax at 4.5% of the landed value, which is the purchase price plus shipping, insurance and handling to get the vehicle to a Hawaii port. Sales or use tax already paid to another state credits against it dollar for dollar. This applies to new residents bringing a car and to anyone buying on the mainland to import, and it is separate from registration and weight tax.
Do electric vehicles pay less to register in Hawaii?: They pay more. An EV owes a $50 annual state road-use surcharge on top of the same registration fees and weight tax as every other vehicle, or $0.008 per mile under the optional mileage program phased in from July 1, 2025. In Maui County an EV also pays a $100 county EV fee, and Maui charges hybrids a separate $50. Weight tax is unaffected by fuel type.
Can I renew my Hawaii registration without a safety inspection?: No. All four counties check for a current inspection before the renewal will process, whether it is done online, at a kiosk or at the counter. The inspection is annual and costs $25.75 for cars and trucks and $17.75 for motorcycles and trailers, at rates effective July 1, 2025. It is obtained at a licensed inspection station, not at the registration office.

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