Running cost for the Smeg DW8220
The Smeg DW8220 is certified by ENERGY STAR at 235 kWh a year, about average for its category to run among dishwashers currently certified.
That $44 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
How the Smeg DW8220 compares to other dishwashers
The category average is 232 kWh/yr; this model runs 1.3% above it, ranking 292 of 737 dishwashers tracked here for running cost. 737 certified dishwashers, one average, about $1/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Smeg DW8220 on that list: Zline DW7714-18 ($44/yr, 234 kWh/yr) runs slightly less, while Smeg DW8620 ($44/yr, 235 kWh/yr) runs slightly more.
Same brand, different models
Ranked 7 of Smeg's 9 certified dishwashers, this sits between the DW8630 ($41/yr, the brand's cheapest) and the STU8623 ($45/yr, its priciest).
Cost over its typical lifespan
NAHB's Study of Life Expectancy of Home Components puts a typical dishwasher's service life at 9 years; run the Smeg DW8220 that long and it costs about $398 in electricity, on top of whatever it cost to buy.
Is it worth replacing?
Efficient as certified dishwashers go, $44/year is a reasonable baseline if you're comparing what else is on the market.
See what else is certified in this category before you decide.
If you're keeping it
A dishwasher like the Smeg DW8220 is a real household expense whether or not it needs replacing yet; a protection plan is one way to budget for a repair rather than a full replacement.
How this was checked
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. The full Dishwasher category page shows all 737 dishwashers ranked by cost; the state-rate guide covers the half of this number that isn't the appliance.