How Much Does It Cost to Charge a BMW i4 in Idaho?

Quick Answer

Charging a 2026 BMW i4 at home in Idaho costs approximately $31/month — that's $0.031/mile and saves $1,209/year compared to a 28 MPG gas car at Idaho's gas price of $3.70/gallon.

Sedans offer excellent aerodynamics and some of the highest efficiency ratings in the EV market, making them among the most cost-effective EVs to run daily. Cold weather reduces EV range by 20–40% as the battery heats itself and the cabin. Use scheduled departure to pre-heat on shore power before driving.

Cost per Mile

$0.031

home charging

Monthly Cost

$31

1,000 miles/month

Annual Savings

$1,209

vs. 28 MPG gas car

About the 2026 BMW i4

The BMW i4 is the electric version of the beloved 4 Series Gran Coupe — a four-door fastback sedan that doesn't compromise driving dynamics for electrification. Available in eDrive40 (RWD, 301 miles) or M50 (AWD, 270 miles), it's the EV for driving purists.

Advantages

✓BMW's signature rear-wheel-drive dynamics translated brilliantly to electric

✓Stunning fastback design — one of the best-looking EVs available

✓M50 trim produces 544 hp with world-class handling

✓iDrive 8.5 is among the most refined automotive UIs available

Considerations

✗200 kW DCFC, while good, is below 800V competitors like Ioniq 5 or EV6 GT

✗M50's AWD adds weight that limits range to 270 miles

✗Gran Coupe roofline reduces rear headroom

✗No front trunk — limits total storage

Ideal Buyer

Driving enthusiasts who refuse to buy an EV that doesn't feel like a driver's car. BMW 3 or 4 Series owners ready to go electric. Buyers for whom style and dynamics matter as much as range.

vs. Gas Equivalent

Direct EV equivalent of the BMW 4 Series Gran Coupe. Gas equivalent fuel economy would be approximately 27 MPG for a comparable gas 4 Series.

BMW i4 Charging Cost Breakdown in Idaho

Idaho's electricity rate of $0.11/kWh is below the national average of $0.17/kWh. At this rate, the BMW i4's 81 kWh battery costs $8.91 for a full charge — making it one of the more compelling EV economics in this state.

Charging Method

$/kWh

$/month

$/year

🏠 Home (Level 2)

$0.11

$31

$377

🔌 Public Level 2

$0.20

$57

$679

⚡ DC Fast Charger

$0.49

$140

$1,680

⛽ Gasoline (28 MPG)

$3.70/gal

$132

$1,586

Based on 1,000 miles/month. Public L2 estimated at 1.8× home rate. DC fast charging at national average of $0.49/kWh.

2026 BMW i4Specs & Charging Data

200 kW DC fast charging. Level 2 at home (11 kW AC onboard) charges the 81 kWh battery in approximately 6.5 hours. 0–80% DC fast charging takes approximately 31 minutes.

Battery

81 kWh

EPA Range

301 miles

Efficiency

3.5 mi/kWh

kWh/100 miles

28.6 kWh

DC Fast Charge

200 kW max

10–80% Time

~24 min

Body Type

Sedan

MSRP

$52,200

Full Charge Cost

$8.91

EV Ownership in Idaho

Idaho has a small but growing EV market, centered on Boise and the Treasure Valley. The state's exceptionally low electricity rates ($0.11/kWh) make it one of the cheapest places in the US to charge an EV.

Incentives & Programs

Idaho offers no state EV tax credit, but federal incentives apply. Idaho Power offers time-of-use plans with off-peak rates that can go even lower. The base $0.11/kWh rate is already competitive with TOU off-peak rates in most states.

Charging Infrastructure

I-84 through Boise is well-covered. North-south stretches (US-95 toward Coeur d'Alene) are improving. Southern Idaho's rural stretches require careful planning. Boise has the best urban charger density.

Grid & Energy Source

Idaho's grid is dominated by hydropower (~65%) from dams on the Snake River and Columbia River system. This makes Idaho EV charging among the cleanest in the US, with among the lowest carbon footprints nationally.

IdahoElectricity Rates & EV Savings

The average residential electricity rate in Idaho is $0.11/kWh, which is below the national average of $0.17/kWh. With a gas price of $3.70/gallon, Idaho ranks as a very favorable state for EV ownership.

Cold weather reduces EV range by 20–40% as the battery heats itself and the cabin. Use scheduled departure to pre-heat on shore power before driving. Your BMW i4's 81 kWh battery provides up to 301 miles of EPA-rated range. Real-world range may vary by 10–30% depending on temperature, speed, and terrain.

Annual EV Cost (home)

$377

BMW i4 @ $0.11/kWh

Annual Gas Cost (28 MPG)

$1,586

@ $3.70/gallon in Idaho

You save every year by driving electric in Idaho

$1,209/year

That's $101/month saved vs. a 28 MPG gas car

Home vs. DC Fast Charging in Idaho

Monthly cost comparison for 1,000 miles in a BMW i4:

🏠 Home L2

$31

$31/mo

🔌 Public L2

$57

$57/mo

⚡ DC Fast

$140

$140/mo

⛽ Gasoline

$132

$132/mo

Tips for Charging Your BMW i4 in Idaho

Idaho's cold climate and charging infrastructure have specific implications for BMW i4 owners. Here are practical tips to maximize range and minimize charging costs in this state:

At $0.11/kWh, Idaho has some of the cheapest home EV charging in America — even without a TOU plan, costs are low.

Idaho's hydro-heavy grid means you're essentially charging on clean, renewable power year-round.

Winter snowpack and mountain terrain near Sun Valley and Coeur d'Alene reduce range — charge fully before mountain routes.

Idaho Power's overnight TOU rates can drop charging costs further to as low as $0.08/kWh.

Frequently Asked Questions

How much does it cost to charge a BMW i4 at home in Idaho?

At Idaho's average residential rate of $0.11/kWh, charging a 2026 BMW i4 at home costs approximately $31/month based on 1,000 miles of driving. A full charge costs $8.91.

How much does it cost to fully charge a BMW i4?

A full charge of the BMW i4's 81 kWh battery costs $8.91 at Idaho's rate of $0.11/kWh. At a public DC fast charger ($0.49/kWh), that's about $39.69.

Is it cheaper to charge a BMW i4 or drive a gas car in Idaho?

Home charging the BMW i4 in Idaho costs $0.031/mile. A comparable 28 MPG gas car costs $0.13/mile at Idaho's gas price of $3.70/gallon. EVs save approximately $1,209/year.

How long does it take to charge a BMW i4 with DC fast charging?

The BMW i4 supports up to 200 kW DC fast charging. A 10–80% charge takes approximately 24 minutes at peak speed. Actual time varies by charger capacity, battery temperature, and current state of charge.

How much does a BMW i4 add to your electric bill in Idaho?

Driving 1,000 miles/month in a BMW i4 adds about $31 to your monthly electric bill in Idaho. That's 28.6 kWh per 100 miles × $0.11/kWh.

How does cold weather in Idaho affect BMW i4 range?

Cold winters in Idaho can reduce BMW i4 range by 20–40%. With a 81 kWh battery and 301-mile EPA range, plan for 211–241 miles in cold conditions. Use the scheduled departure feature to pre-heat the cabin while still plugged in to preserve driving range.