The Two Methods at a Glance
The IRS gives you two ways to deduct a business vehicle. For EVs the choice is unusually interesting — electric "fuel" is so cheap that the answer surprises people in both directions.
| Standard mileage | Actual expenses | |
|---|---|---|
| 2026 rate | 72.5¢ per business mile | Real costs × business-use % |
| Covers | Fuel, depreciation, insurance, repairs — all bundled | Electricity, depreciation, insurance, repairs, tires, registration — itemized |
| Records needed | Mileage log (business miles, dates, purpose) | Mileage log plus receipts and a charging log |
| Best when | High business miles, affordable efficient car | Expensive vehicle, high depreciation, lower miles |
Why EVs Change the Math
A gas car spends 12–18¢ per mile on fuel. A home-charged EV spends roughly 3–5¢ per mile (about 0.25–0.30 kWh/mile at typical residential rates). That cuts both ways:
- Standard mileage can be a windfall. You deduct 72.5¢/mile while your actual running cost might be a fraction of that. High-mileage drivers of affordable, efficient EVs often come out ahead here.
- Actual expenses can still win for newer, more expensive EVs: depreciation is the single biggest real cost of an EV, and the actual method captures your real depreciation, insurance, and repairs — which the flat rate may undercompensate.
A Worked Example
Self-employed driver, 20,000 business miles/year (80% business use), EV bought for $48,000:
| Item | Standard mileage | Actual expenses |
|---|---|---|
| Mileage deduction | 20,000 × $0.725 = $14,500 | — |
| Charging (6,000 kWh × $0.16 × 80%) | included | $768 |
| Depreciation (year 1, 80%) | included | ~$7,600 |
| Insurance, repairs, tires (80%) | included | ~$2,400 |
| Total deduction | $14,500 | ~$10,768 |
Here standard mileage wins — but flip the inputs (8,000 business miles, luxury EV, big first-year depreciation) and actual expenses can come out thousands ahead. There is no universal answer; there is only your data.
The Rules That Trap People
- The first-year choice matters. To ever use standard mileage on a vehicle, you must use it the first year the car is in business service. You can switch to actual expenses later — but not the reverse (with straight-line depreciation caveats).
- If you start with actual expenses, you're generally locked in for that vehicle.
- You can't mix: charging costs cannot be added on top of the standard mileage rate.
Practical strategy: track both from day one — miles and actual charging costs. Then you (or your CPA) can run both calculations each year and pick the winner where the rules allow it. The tracking is the cheap part; the deduction is the expensive part to get wrong.
How ChargeDoc Helps You Decide
- Automatic charging cost capture from your Wallbox, go-e, or Tesla Wall Connector — your real cost per kWh and per month, not an estimate.
- Average price/kWh and yearly totals on the dashboard — the exact inputs for the actual expense calculation.
- Business-use percentage per vehicle.
- IRS Business Use Report — if actual expenses win, the documentation is already done.
Disclaimer: ChargeDoc reports are informational only and not tax advice. Depreciation rules are complex — consult a CPA or tax advisor before choosing a method.