The average out-the-door price for a 2026 Mazda MX-5 Miata in Idaho is approximately $31,300 including Idaho's 6% state sales tax ($1,739 on the base $28,985 MSRP), title and registration fees of about $140, and the state's average dealer documentation fee of $399. Local county taxes, optional dealer add-ons, and chosen trim level can all push the final figure higher — use the calculator below to dial in the exact number for your situation.
| Cost component | Estimated amount |
|---|---|
| Base MSRP (Mazda MX-5 Miata) | $28,985 |
| Idaho state sales tax (6%) | $1,739 |
| Average dealer doc fee | $399 |
| Title & registration (estimate) | $140 |
| Estimated out-the-door total | $31,300 |
On a base Mazda MX-5 Miata (MSRP $28,985), Idaho buyers should plan for roughly $31,300 out-the-door. That figure stacks $1,739 in Idaho state sales tax (6% on the vehicle), about $399 in dealer documentation fees, and roughly $140 for title and registration paid to the Idaho DMV.
Higher trims, packages, and county-level taxes can push the final number several thousand dollars above this baseline. The numbers above assume the lowest available trim and the state's average doc fee — your actual quote will vary by dealer and county.
The MX-5 Miata is a coupe in the Mazda lineup, with a base MSRP of $28,985. Idaho's combination of a 6% state sales tax and an average dealer doc fee of $399 puts it in the mid-range bucket among U.S. states for total out-the-door cost on this vehicle.
If you're cross-shopping nearby states or other Mazda models, the calculator on this page lets you swap inputs and see the OTD impact in real time.
Starting from a base MSRP of $28,985, the typical out-the-door price for a 2026 Mazda MX-5 Miata in Idaho runs about $31,300 — roughly $1,739 in state sales tax (6%), $399 in average dealer doc fees, and around $140 for title and registration. Higher trims, optional packages, and county taxes can add several thousand more.
Idaho charges a 6% state sales tax on vehicle purchases. On a Mazda MX-5 Miata at $28,985 MSRP, that works out to about $1,739. Some Idaho counties add local surtaxes (typically 0%–3% on top of the state rate), so confirm the rate for the county where you'll register the vehicle.
Idaho dealers charge an average documentation fee of around $399. Idaho sets no statutory cap on documentation fees, so they vary by dealer — negotiate this line. On top of that you'll see destination/freight (set by Mazda, typically $1,095–$1,795 depending on model) and state title and registration costs in the $65–$240 range. Always ask for an itemized out-the-door quote so you can spot any add-ons before signing.
Mazda runs national rebates and finance offers that change month-to-month — check Mazda USA's current offers page. Idaho-specific incentives may include EV rebates (especially relevant if you're shopping the coupe as an EV trim), first-responder or military discounts, and credit union financing perks. Stack manufacturer + state + lender programs whenever possible.
Sales tax is owed in the state where the vehicle is titled and registered, not where you buy it. So if you live in Idaho, crossing state lines to dodge Idaho's 6% sales tax usually doesn't work — you'll still owe Idaho tax when you register at home. The exception is when neighboring inventory and dealer pricing are meaningfully better; in that case, compare full out-the-door totals (including Idaho tax) before deciding.