The question
Nathan is a 34-year-old software engineer living in Capitol Hill. He works hybrid at a Redmond tech company — three days in office, two remote — and his 2017 Mazda CX-5 is starting to feel dated. The commute is 32 miles round trip on office days plus miscellaneous city driving on weekends, adding up to about 12,000 miles a year. Below the national average, but not tiny.
He walked into his neighborhood Hyundai dealer expecting to look at the Tucson (his instinct — Hyundai's mainstream compact SUV, similar footprint to his current CX-5). The salesperson said "you should see the Ioniq 5 too — it's the same size, it's electric, and you'll save on Washington sales tax." Nathan was skeptical of the salesperson's math but curious enough to run it himself.
His constraints: 12,000 miles a year, cash purchase, five-year ownership horizon, and a garage in his condo building that already has EV charging installed (no infrastructure cost). The comparison: 2025 Hyundai Tucson SEL AWD (gas) vs. 2025 Hyundai Ioniq 5 SE RWD Standard Range (EV).
The vehicles
2025 Hyundai Tucson SEL AWD
$31,000
- Combined MPG26
- CategoryCompact crossover · AWD
- Depreciation model10% / yr (Hyundai strong retention)
2025 Hyundai Ioniq 5 SE RWD Standard Range
$43,000
- Efficiency30 kWh / 100 mi
- CategoryCompact crossover · RWD
- Depreciation model13% / yr (Ioniq 5 solid retention)
The 5-year math
| Hyundai Tucson | Hyundai Ioniq 5 | |
|---|---|---|
| MSRP | $31,000 | $43,000 |
| Depreciation (5-yr loss) | $12,695 | $21,568 |
| Fuel or electricity (5-yr) | $9,923 gasoline | $2,070 electricity |
| Insurance (5-yr) | $7,000 | $8,000 |
| Maintenance (5-yr) | $2,750 | $2,000 |
| State incentive | — | −$1,640 (WA sales tax exemption) |
| 5-year true cost to own | $32,368 | $31,998 |
| Difference | Hyundai Ioniq 5 wins by $370 — essentially a tie | |
Assumptions: West Coast gasoline at $4.30/gal (Washington state average with high state gas tax). Seattle City Light residential rate at $0.115/kWh (municipal utility, flat non-TOU pricing). Insurance from Drive Economics's density-and-MSRP model for a Seattle ZIP. Maintenance from make and category (Hyundai mainstream gas; Hyundai EV multiplier applied). Depreciation is geometric. Ioniq 5 depreciation of 13%/yr reflects solid retention performance since launch — better than most competitors. Washington state EV sales tax exemption (RCW 82.08.809) applies to new EVs under $45,000 MSRP, exempting sales/use tax on the first $16,000 of value — approximately $1,640 savings at Seattle's 10.25% combined rate. Federal EV tax credit expired September 30, 2025 and is excluded. See methodology.
The verdict
The Ioniq 5 wins by $370 over 5 years — a margin so small it functions as a tie. On any given day, a $50 shift in gas prices, a $200 change in insurance premium, or a slight adjustment to depreciation assumptions could flip the outcome. Nathan could genuinely go either way and be financially defensible.
What's driving the coin flip is real forces canceling each other out. The Ioniq 5 saves $7,853 in fuel cost thanks to Seattle City Light's cheap electricity vs. Washington's expensive gasoline. It also saves $750 in maintenance and captures $1,640 in state sales tax exemption. Total advantages: $10,243.
But the Ioniq 5 also loses $8,873 more in depreciation (bigger sticker means bigger absolute loss even with similar retention percentages) and $1,000 more in insurance. Total disadvantages: $9,873.
Net: $10,243 in EV advantages minus $9,873 in EV disadvantages equals $370. That's what "the math is a coin flip" looks like arithmetically.
The deeper story here is that Seattle is a genuinely balanced market for EV economics. Cheap electricity favors EVs. Expensive gas favors EVs. Solid sales tax exemption favors EVs. But moderate mileage (12K vs 18K in most of our other cases) doesn't give the EV enough operating cost time to compound. Everything is close because the fundamentals push in opposite directions simultaneously.
For Nathan personally, this means the decision comes down to preferences — cargo space, tech features, garage-to-office range confidence, resale expectations. Not the money. The money is a wash.
What could change this
- Higher mileage tips the EV win. At 18,000 mi/yr the Ioniq 5's advantage grows to roughly $4,500 (extra fuel savings compound). At 22,000 mi/yr it approaches $7,000. This is a clear pattern across the library — EV economics improve with mileage.
- Lower mileage tips the gas win. At 8,000 mi/yr the Tucson wins by about $2,500 — fuel savings can't overcome the sticker premium at low usage. Nathan is right at the crossover threshold.
- Choosing the Ioniq 5 Long Range or AWD trims pushes MSRP above $45,000, disqualifying the vehicle from Washington's sales tax exemption. The loss of the $1,640 credit alone would flip the outcome to a gas win.
- PSE territory instead of Seattle City Light. If Nathan lived in Bellevue or Redmond (Puget Sound Energy), his electricity rate would be roughly $0.12-0.14/kWh with TOU options. Overall similar economics but slightly worse for the EV.
- Federal EV credit reinstated. The prior $7,500 credit expired September 30, 2025 and is excluded here. If reinstated, the Ioniq 5 would win by roughly $7,870 — a landslide.
- Comparing to a Toyota RAV4 Hybrid (39 MPG) instead of the gas Tucson would close the fuel gap significantly. Against the RAV4 Hybrid, Ioniq 5 loses by about $2,000. Hybrids remain the strongest gas-side competitor when mileage is moderate.
- Insurance shopping. Seattle has one of the more competitive insurance markets in the country. A 10-15% premium reduction on the Ioniq 5 through aggressive quote shopping could add $600-1,000 back to the EV column, widening the margin meaningfully.
Run these numbers with your details
Different Seattle ZIP, different mileage, or considering higher Ioniq 5 trims? The comparison changes fast. Try the calculator with Nathan's vehicles pre-loaded, then adjust for your situation.
Compare Ioniq 5 vs. Tucson in the calculator →