Model
Bosch WGA12400**
Rank #21 means 20 of the 388 washing machine models we track cost less to run each year; the 33rd efficiency percentile means it uses less energy for its size than 33% of those models.
What does the Bosch WGA12400** cost to run per year?
Do the math and the Bosch WGA12400**'s $13/yr puts it at rank #21 of 388, one of the more affordable washing machine models we track to keep running. Normalized for capacity, it beats only 33% of washing machine models we track, a below-average efficiency result. The IMEF figure of 2.4 on this model captures integrated modified energy factor, the main efficiency lever ENERGY STAR tracks for this class.
Immediately around it on the leaderboard, the Midea MLH27N4AWWC at $12/yr runs a little cheaper and the Truarctic TAFW2422W at $13/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A washing machine typically stays in service for somewhere around 10 years; over that span, the Bosch WGA12400**'s $13/yr adds up to roughly $130 in electricity alone, before purchase price or repairs.
By the numbers
The Bosch WGA12400** normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $13/yr, here is what the Bosch WGA12400** adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Bosch WGA12400** costs about $130. That is roughly $70 less than the class median, which would run closer to $200 over the same ten years.
How the Bosch WGA12400** compares
The washing machine class we track runs from $7 to $58 a year. At $13/yr, it runs about $7 a year cheaper than the class median of $20, and it is about $6 a year more than the cheapest washing machine to run at $7.
What drives its running cost
At 2.1 cu ft, the Bosch WGA12400** is a small washing machine for its class, which spans 1.9 to 6 cu ft with a median of 4.5 cu ft, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is. Beyond size, its IMEF of 2.4, below the class median of 2.76, is the class's own efficiency yardstick, integrated modified energy factor, and it is what separates two similarly sized models with different running costs.
- Spin and wash efficiency (IMEF). A higher Integrated Modified Energy Factor means the machine wrings more useful washing (and a drier spin) out of every kilowatt-hour and gallon it uses.
- Drum volume. Drum volume sets the ceiling on how much a single cycle can wash, and it is usually the first driver of a washer's per-cycle energy use.
- Water heating. Cycle temperature, more than drum size, is usually what separates a cheap wash cycle from an expensive one on models with an internal water heater.
Common questions
Is the Bosch WGA12400** cheap to run?
Yes, relatively. At $13 a year it ranks #21 of 388 washing machine models we track, in the cheaper part of its class to run.
How much does the Bosch WGA12400** cost per month?
Roughly $1.08/mo, spreading the $13/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 70 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $13 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Bosch WGA12400** for its size?
33rd percentile once size is factored in. That means its size-adjusted efficiency is not the main reason for the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 20 | Midea MLH27N4AWWC2.5 cu ft | $12 |
| 19 | Midea MLH25N7BWW2.5 cu ft | $12 |
| 18 | Speed Queen LWN6ZR**119T***3.2 cu ft | $11 |
| 17 | Speed Queen LWN6ZR**116T***3.2 cu ft | $11 |
| 16 | Frigidaire FWFX22D4EW4.4 cu ft | $9 |
Source
ES_31649_WGA12400**_092820252033423_7976769View certified washing machine listingsENERGY STAR data as of July 2026Bosch and WGA12400** are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.