How Much Does It Cost to Charge a Hyundai Ioniq 9 at Home? $20.97

Charging a 2027 Hyundai Ioniq 9 costs about $20.97 for a full charge and $6.51 per 100 miles at 17¢/kWh — about $781 a year at 12,000 miles.

Updated September 2026 · Source: EIA Electric Power Monthly Table 5.6.A (July 2026 data) · EPA fueleconomy.gov · next EIA update ~Oct 23

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Why this number

Charging a 2027 Hyundai Ioniq 9 costs about $20.97 for a full charge (~123 kWh) at the US average rate of 17¢/kWh — roughly $6.51 per 100 miles, or $781 a year at 12,000 miles. The Ioniq 9 uses 38.3 kWh/100 mi on the EPA combined cycle. The Ioniq 9’s real cost scales with your own rate, from about 12¢ to over 50¢ across the US.

The Hyundai Ioniq 9 (EPA data for the 2027 model year, the newest the EPA lists; dollar figures use 2026 electricity rates) uses 38.3 kWh per 100 miles on the EPA combined cycle — the wall-outlet figure, so charging losses are already counted (look up your exact trim at fueleconomy.gov ). At the US average residential rate of 17¢/kWh that puts the Ioniq 9 at about $6.51 per 100 miles — 6.51¢ a mile. That lands mid-pack: 49th of the 67 current models tracked here. Nothing about the running cost of the Ioniq 9 will surprise you in either direction, which for a SUV at 38.3 kWh/100 mi is a reasonable outcome.

What an Ioniq 9 costs to charge at every rate

The same Ioniq 9 costs $4.73 per 100 miles at Idaho’s 12.35¢ and $20.19 at Hawaii’s 52.72¢ — a 4.3× spread that is entirely the rate:

Wall-side for the Ioniq 9: EPA’s 38.3 kWh/100 mi is measured at the outlet, charger losses included; quick-fill your state above for your own figure.

That per-mile figure is the one to hold against gasoline: at 17¢/kWh the Ioniq 9’s 6.51¢ a mile compares with about 13.6¢ for a 30-mpg gas car at $4.07 a gallon (EIA weekly, Aug 31, 2026). The EV vs gas cost guide works the Ioniq 9’s math in full — both formulas, and the electricity rate at which the advantage disappears.

Range: what a “full charge” of the Ioniq 9 really means

EPA combined range is about 322 miles. Multiplying that by the car’s efficiency gives roughly 123 kWh to refill a full range from empty, which is the honest way to think about a ‘full charge’ — battery capacity figures include a buffer you never actually use.

The Ioniq 9 on a public fast charger

On a public fast charger at about 48¢/kWh the Ioniq 9 costs $18.38 per 100 miles against $6.51 at home — 2.8× — or roughly $2,206 a year instead of $781 if it never sees a home outlet. Why a session costs more than the posted price for a Ioniq 9 (10–80% charging curve, idle fees, per-minute billing) is explained once on the cost-to-charge hub ; the EV time-of-use calculator nets an overnight rate against the Ioniq 9’s $781 flat-rate figure.

The Ioniq 9 in cold weather

A hard winter lifts the Ioniq 9 from 38.3 to roughly 49.8 kWh/100 mi (the middle of the 20–40% rise real-world data shows), so $8.46 per 100 miles instead of $6.51 and an effective range nearer 248 miles than 322. The mechanics behind the Ioniq 9’s winter penalty — cabin heat, battery chemistry, preconditioning from the wall — are on the hub ; the Ioniq 9’s $781 annual figure above already averages the seasons.

Where the Ioniq 9 sits against other EVs

Its nearest neighbors on efficiency are the Polestar 3 (38.2 kWh/100 mi) and the Acura ZDX (38.4 kWh/100 mi). The Ioniq 9 at 38.3 kWh/100 mi sits against a set that runs from the Tesla Model Y at 26.9 kWh/100 mi, and the least efficient is the GMC Hummer EV at 67.8 — a spread that changes annual charging cost by $834 a year at 17¢/kWh and 12,000 miles. And if a SUV like the Ioniq 9 is the fixed requirement, the cheapest SUV to run tracked here is the Tesla Model Y at $549 a year — $233 less than the Ioniq 9.

Trims: does the Ioniq 9 version you pick change the bill?

The EPA rates 3 configurations of the 2027 Ioniq 9, and they are not close: 37.0 kWh/100 mi for the most efficient, 40.0 for the least, a 8% spread. At 12,000 miles that is about $61 a year between the cheapest and most expensive version of the same Ioniq 9. Bigger wheels, all-wheel drive and performance tunes are usually what separates them — worth knowing before you tick the options box.

How it compares inside the Hyundai range

The Ioniq 9 at 38.3 kWh/100 mi sits among 4 Hyundai EVs tracked here, running from 29.5 (Kona) to 38.3 (Ioniq 9). Also on this site: Hyundai Kona , Hyundai Ioniq 5 , Hyundai Ioniq 6 .

The tax question for the Ioniq 9, answered plainly

Nothing about the Ioniq 9 changes that: the rules are the same for every EV, and the full 2026 position — §30D, §25E, the ended §30C charger credit, state programs — is in the energy tax credit guide and on the cost-to-charge hub .

Related

Closest comparisons to the Ioniq 9 on running cost and body style: Polestar 3 (38.2 kWh/100 mi), Acura ZDX (38.4 kWh/100 mi).

Put the Ioniq 9’s $781 a year against a gas car in the EV vs gas calculator , check your state’s rate , or price a road-trip stop for a Ioniq 9 in the Supercharger vs home calculator . All 67 EVs . The Ioniq 9 is only one line on the household bill — the 40-appliance running-cost ranking shows where $781 a year of charging lands next to everyday loads like a washing machine or a electric oven .

Frequently asked questions

How we calculated this

Worked for the Ioniq 9: 38.3 kWh/100 mi ÷ 100 × 17¢ = $6.51 per 100 miles; 322 mi × 38.3 ÷ 100 = 123 kWh, × $0.17 = $20.97 per full charge; $6.51 × 12,000 ÷ 100 = $781 a year. The Ioniq 9’s gasoline comparison is 12,000 ÷ 30 mpg × $4.07 = $1,628. EPA combined ratings, measured at the wall.

Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.

Where to go next

• Cost to charge a Polestar 3 — 38.2 kWh/100 mi against the Ioniq 9’s 38.3 — $6.49 vs $6.51 per 100 miles at 17¢.
• Cost to charge a Acura ZDX — 38.4 kWh/100 mi against the Ioniq 9’s 38.3 — $6.53 vs $6.51 per 100 miles at 17¢.
• Cost to charge a Hyundai Ioniq 6 — 37.9 kWh/100 mi against the Ioniq 9’s 38.3 — $6.44 vs $6.51 per 100 miles at 17¢.
• Cost to charge an EV: all 67 models ranked — Where the Ioniq 9’s $781 a year sits among 67 EVs, plus the fast-charging, cold-weather and tax explainers.
• EV vs gas cost calculator — The Ioniq 9’s 38.3 kWh/100 mi against your gas car’s mpg and your local pump price.