ND Miata Cost of Ownership: Fuel and Depreciation Dominate

The ND MX-5 is one of the cheapest sports cars to own, and the reason isn’t one line item. Insurance runs about half what a GR86 or BRZ costs for the same driver, it holds the best resale value of any Mazda, maintenance is subcompact-cheap, and the tires are small and ordinary. The car asks premium fuel and the soft top is a real long-term expense, but neither breaks the math. Here is where the money actually goes.

Five-year breakdown: fuel and depreciation dominate, not repairs

Edmunds models the True Cost to Own a 2023 MX-5 at roughly $34,000–$35,800 over five years at 15,000 miles a year, depending on trim. The split below shows that the costs people fear most, repairs and maintenance, are the smallest controllable lines. Fuel and depreciation carry the total.

Category	5-year cost	Per year	Verdict
Fuel (premium)	$11,117	~$2,223	Largest line; mileage-driven
Depreciation	$7,620	~$1,524	Low for the segment
Maintenance	$5,757	~$1,151	Routine; mostly oil and tires
Insurance	$3,674	~$735	Clean adult profile
Financing	$3,544	~$709	Loan-dependent
Repairs	$1,707	~$341	Rare; reliability is strong
Taxes & fees	$1,490	~$298	One-time, front-loaded

Source: Edmunds True Cost to Own, 2023 MX-5. These figures are captured from Edmunds’ published TCO snippet rather than read off the live page, so treat the exact dollars as ballpark and confirm them before quoting. They assume a clean-record adult driver and 15,000 miles a year; cut the miles and fuel, maintenance, and depreciation all drop with them.

Insurance runs about half a GR86’s, but your profile sets the number

The ND is genuinely cheap to insure for a sports car. Aggregators ranked it first of 23 vehicles in the 2024 sports-car class for insurance affordability, averaging roughly $145 a month against about $189 for a typical convertible, per the CarEdge insurance aggregate. The CarEdge averages here come from its aggregated snippet rather than a direct page read, so read them as a ballpark.

The actual number swings hard on driver profile and region. There is no single national figure: aggregators cite a band from about $130 a month on the low end up to roughly $185 a month, or about $2,220 a year, for an average driver. Edmunds models it lower still at about $735 a year for a clean-record adult. Treat any single quote as a starting point and shop it.

The most consistent owner data point is the comparison, not the absolute. Owners on r/Miata and r/GR86 repeatedly report the ND insuring at roughly half the cost of a GR86 or BRZ for the same driver: drivers quoted $300 or more a month for a GR86 routinely insure an ND for $120–$130 with the same record, even in high-cost areas (r/GR86, r/Miata insurance thread). Part of the gap traces to who buys these cars: convertibles skew toward older, established drivers (r/cars).

The reputation assumes an established adult. New and young drivers pay far more. Owners on the r/Miata teen-insurance thread report quotes around $2,500 a year for a new driver with no experience. The car is cheap to insure; an inexperienced driver is not.

It holds value better than any other Mazda, and beats the 86 twins

The ND retains about 69.2% of its value after five years, the best of the entire Mazda lineup, per iSeeCars resale data. The retractable-hardtop RF retains about 67.9%.

A concrete example: a 2020 Sport Convertible with a $27,525 MSRP held roughly 64% of its value five years later, around $18,000, for about $7,000 lost, per Jalopnik’s depreciation analysis. The trim you pick changes the math against the rivals. The base soft-top Sport, at about 35% depreciation, undercuts both the Toyota 86 (about 37%) and the Subaru BRZ (about 42%) over the same span. Higher trims give up more and the gap closes: Club lands around 39%, still under the BRZ, but Grand Touring at around 42.6% and the RF at around 44% actually depreciate slightly more than the BRZ. If you want the resale edge over the 86 twins, the Sport is the trim that delivers it cleanly.

One resale caveat owners flag. The RF can show worse depreciation than the soft top because non-Mazda dealers sometimes price a used RF the same as the cheaper convertible, compressing its premium. If resale is the priority, the soft-top Sport is the strongest retainer.

Maintenance is subcompact-cheap and the schedule is simple

RepairPal puts average annual repair and maintenance at $429, below the $456 subcompact-car average and well under the $652 all-vehicle average, per RepairPal’s MX-5 page. Reliability backs the low number: Mazda rates 4.0 of 5.0 as a brand, fifth of 32, with about 0.4 repair-shop visits a year and only a 10% chance that a given repair is severe.

The scheduled work is conventional, per the Bountiful Mazda summary of the factory schedule:

• Oil, filter, tire rotation. Every 5,000–7,500 miles. RepairPal puts an oil change at $142–$173, and Mazda wants at least one a year regardless of mileage, per RepairPal’s reliability page.
• Air and cabin filters. Every 15,000–30,000 miles.
• Belt, hose, exhaust inspection. Around 40,000 miles.
• Iridium spark plugs. Around 75,000 miles.
• Engine coolant change. A long first interval, then every 60,000 miles.

Confirm exact intervals against the official MazdaUSA maintenance schedule, which is the authoritative source for items the dealer summary omits, such as brake-fluid and gearbox-fluid intervals.

The most common complaint is a loud valve-lifter tick, and it traces to skipped oil changes rather than a design defect: infrequent oil service starves the hydraulic lifters and they rattle on startup. Keep the oil current and it doesn’t happen. Larger one-off repairs exist but are uncommon: a fuel pump runs $1,698–$1,834, a brake booster $471–$603, and a battery $228–$253. Note there is a known low-pressure fuel-pump recall that caused stalls on two model years, so check the VIN against open recalls on a used car.

Tires are small, cheap, and ordinary

The ND’s tires are one of the clearest savings versus other sports cars because the car is light and the wheels are modest. Per TireSize.com, the Sport trim runs 195/50R16 on 16x6.5 wheels, while Club, Grand Touring, the RF trims, and the 35th Anniversary run 205/45R17 on 17x7 wheels.

A set of four in the common 205/45R17 size ranges from roughly $267 for budget all-seasons to about $688 for mid summer tires to around $768 for performance all-seasons, plus mount and balance, per the 1010Tires pricing aggregation. Individual tires start near $36. Confirm current pricing before you buy; tire prices drift with the market.

Fuel is the biggest bill, and it wants premium

The ND returns about 26 mpg city, 34 highway, and 29 combined with the manual, per US News performance specs, and Mazda recommends 91-octane premium. Real-world owners often meet or beat the EPA figures. Premium fuel over 15,000 miles a year is why Edmunds models the largest single ownership line as fuel, $11,117 over five years. Drive fewer miles and this number falls faster than any other.

The soft top is the one real long-term surprise

Budget for the convertible top. A replacement soft top runs over $3,000, a running-cost line item owners flag on r/Miata. It is a once-a-decade expense, not annual, but it is large enough that RF buyers sometimes justify the hardtop on it. Garaging the car and treating the fabric extends its life well past the warranty.

Bottom line: cheap where it counts, with two known expenses

The ND is cheap to insure, holds its value, and costs little to maintain. The money goes to fuel and depreciation, both of which scale with miles, so a low-mileage weekend ND is one of the least expensive enthusiast cars to keep. Plan for two things the headline numbers hide: premium fuel every fill-up, and a $3,000-plus soft top somewhere down the road on a convertible.