Running cost for the Ikea 005.876.23
ENERGY STAR certifies the Ikea 005.876.23 at 240 kWh/yr, about average for its category to run for its category.
That $45 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.
Efficient, or not, for a dishwasher
The category average is 232 kWh/yr; this model runs 3.4% above it, ranking 589 of 737 dishwashers tracked here for running cost. That average is drawn from all 737 dishwashers ENERGY STAR currently certifies, not an outside number, a $2/year gap from this model at the national rate. Full sourcing is in the sourcing notes.
Right next to it on the list
A rank or two either side of the Ikea 005.876.23: Honeywell HDS24SS-H ($45/yr, 240 kWh/yr), then Ikea 705.910.18 ($45/yr, 240 kWh/yr).
Same brand, different models
Of the 5 ENERGY STAR certified dishwashers Ikea makes, the 005.876.23 is the cheapest to run, about the same, within a dollar a year, less than Ikea's priciest, the RANSBERG 105.911.58.
Ikea 005.876.23 over 9 years
Over the 9-year service life NAHB reports for this category, running the Ikea 005.876.23 costs roughly $406 in electricity, separate from the purchase price.
Weighing a replacement
Efficient as certified dishwashers go, $45/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified dishwashers before buying.
If you're keeping it
A dishwasher like the Ikea 005.876.23 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.
Where this number comes from
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. Ranked 589 of 737, the Ikea 005.876.23 sits in the middle of the dishwasher category, see the guide to why your state changes this number for the other half of the math.