St. Mary Parish car sales tax: 9.45% to 10.45%

The rate in St. Mary Parish

Vehicle sales tax in St. Mary Parish is not a single number — it runs from 9.45% to 10.45% depending on which city you register in. Most of the county is at 9.45%.
That is above the 9% most Louisiana counties charge — about $157.50 more tax on a $35,000 car than the typical county in the state.
No other county in Louisiana charges this rate — St. Mary sits at number 34 of 64 by combined rate.

Where the rate changes inside St. Mary Parish

10.45% — Baldwin, Franklin.
10.25% — Morgan City.
9.45% — Morgan City (outside city limits), Amelia, Baldwin (outside city limits), Berwick, Centerville, Charenton, Franklin (outside city limits), Garden City and 1 more.
This is why a county-wide figure is not enough here: two addresses in St. Mary Parish can carry different tax on the same car, and in 4 of its ZIP codes the boundary runs through the middle so the ZIP alone cannot settle it. The calculator asks you which side you are on.

What a $35,000 car actually costs in St. Mary Parish

Sales tax (10.25% — Morgan City, St. Mary Parish) — $3,632.19
Doc fee (state cap) — $436.00
Title fee — $68.50
OMV handling fee — $8.00
License plate fee (2 years) — $70.00
Tag agent convenience fee (up to) (est.) — $27.00
Out the door — $39,241.69 on a $35,000 used car, before any down payment or financing.

ZIP codes in St. Mary Parish

70340, 70342, 70380, 70381, 70392, 70514, 70522, 70523, 70538, 70540.
Any of these resolves to St. Mary Parish in the calculator, at whichever of the county's rates applies to that ZIP.

St. Mary Parish against nearby counties

Acadia Parish is 9.25% — $70.00 LESS tax on a $35,000 car than St. Mary Parish.
Bossier Parish is 9.25% — $70.00 LESS tax on a $35,000 car than St. Mary Parish.
Ascension Parish is 9.5% — $17.50 MORE tax on a $35,000 car than St. Mary Parish.
Red River Parish is 9.5% — $17.50 MORE tax on a $35,000 car than St. Mary Parish.
This follows where you REGISTER, not where the dealer is, so a lower rate nearby only helps if you actually live there. It is not something you can choose at the dealership.

Run your own numbers

Vehicle price

$

The negotiated or advertised price, before tax and registration.

Your ZIP code

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

Dealer's ZIP code (optional)

A few states tax at the dealer's location instead of yours. If you know the dealer's ZIP, enter it for an exact tax.

Condition

New Used CPO

Fuel

EV/PHEV surcharges apply in many states.

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

Common questions

Why is the car sales tax different in parts of St. Mary Parish?

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 St. Mary Parish it ranges from 9.45% to 10.45%.