How Maine taxes a car deal
- State tax rate
- 5.5%
- Local add-ons
- None typical
- Trade-in credit
- Yes — taxed on the difference
- Doc fee
- Uncapped
Maine taxes vehicles at a flat 5.5% statewide — no municipal add-ons — with the trade-in credit applied in full on dealer purchases. A $32,000 purchase with an $8,000 trade is taxed on $24,000: $1,320, and the math rarely gets more complicated than that at purchase time.
Doc fees are uncapped, typically $400–600 in the current market — the one line on a Maine buyer's order with real spread between dealers, and therefore the one worth comparing when quotes are otherwise close.
The Maine-specific cost lives after the purchase: the annual municipal excise tax, charged by your town at registration on a mil-rate schedule that starts around $24 per $1,000 of the manufacturer's list price in year one and steps down for six years. On a $35,000 MSRP vehicle that's roughly $840 the first year — often more than the doc fee everyone haggles over — and it follows the original list price, not what you paid. It's the single most underestimated number in Maine car ownership; put it in the budget before the dealership visit, not after the town bill arrives.
Every figure above was last verified against official Maine sources in July 2026. Tax rules do change — the final word is always your paperwork and the DMV.