How Florida car sales tax works on a dealer sale — and the $5,000 surtax cap everyone calculates wrong
How Florida car sales tax works on a dealer sale: the 6% state rate, the county surtax that only applies to the first $5,000, and the trade-in credit that cuts the taxable amount.
Florida car sales tax looks simple — 6% plus your county's surtax — until you actually calculate a deal and discover the surtax doesn't work the way most people assume. Here's the math on a dealer sale, including the trade-in credit and the $5,000 cap that even some dealer software gets wrong.
The Florida car sales tax rate: 6% state, plus county surtax
Florida charges 6% state sales tax on vehicle sales. On top of that, most counties add a discretionary sales surtax — commonly 0.5% to 1.5%, set county by county.
But here's the part everyone misses: the county surtax only applies to the first $5,000 of the taxable amount. The 6% state tax applies to the whole thing; the surtax is capped.
The trade-in credit
On a dealer sale, tax is calculated on the sales price minus the trade-in allowance. Trade in a $4,000 car against a $17,000 SUV, and the taxable amount is $13,000 — the customer never pays tax on money the trade covered.
That credit only exists at a dealership. A buyer who sells their old car privately and then buys from a private party gets no such break — another honest advantage you have at the desk.
The math, done right
Take that $17,000 SUV with a $4,000 trade in a county with a 1% surtax:
- Taxable amount: $17,000 − $4,000 = $13,000
- State tax: 6% × $13,000 = $780
- County surtax: 1% × $5,000 (capped) = $50
- Total tax: $830
The wrong way — the one you'll see on plenty of buyer's orders — is 7% × $13,000 = $910. That overcharges the customer $80, and if it's on the paperwork you filed, it's your problem to fix. The surtax cap is per the first $5,000 of the taxable price, so on any deal over $5,000 the flat "state plus county" percentage is always wrong.
How you remit it
Florida dealers collect the tax at closing and remit it to the Department of Revenue on their sales-tax return. The deal paperwork — buyer's order, HSMV 82040 title application, and your books — all need to carry the same, correctly-capped number.
The short version
- 6% state tax on the full taxable amount
- County surtax only on the first $5,000 — capped, not flat
- Tax base = sales price minus trade-in allowance
- You collect at closing and remit to the Florida DOR
DealerVLO calculates Florida sales tax with the trade-in credit and the $5,000 surtax cap automatically on every deal — so the buyer's order and the title paperwork agree, and nobody gets overcharged $80.