Model
Bosch B18IF905SP
Rank #310 means 309 of the 622 freezer models we track cost less to run each year; the 22nd efficiency percentile means it uses less energy for its size than 22% of those models.
What does the Bosch B18IF905SP cost to run per year?
Among the 622 freezer models we track, the Bosch B18IF905SP's $75/yr running cost ranks it #310, close to dead center. It uses 20% less energy than the U.S. federal standard model in its class, which would cost about $92/yr to run, a saving of roughly $17 a year. Capacity-normalized, it ranks ahead of just 22% of freezer models we track, a soft spot worth weighing against the dollar figure. This class has no published efficiency-factor figure beyond annual kWh itself, so at 8.6 cu ft (the class spans 1.1 to 23), size is the clearest lever we can point to for this model's running cost.
Immediately around it on the leaderboard, the Sub-Zero ID-30FI at $74/yr runs a little cheaper and the Gaggenau RF411705 at $75/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A freezer typically stays in service for somewhere around 14 years; over that span, the Bosch B18IF905SP's $75/yr adds up to roughly $1050 in electricity alone, before purchase price or repairs.
Also sold as: Gaggenau RF411705, Miele F 2412 Vi, Thermador T18IF905SP.
By the numbers
The Bosch B18IF905SP 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 $75/yr, here is what the Bosch B18IF905SP 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 B18IF905SP costs about $750. That is roughly $170 less than a standard model in its class, which would run closer to $920 over the same ten years.
How the Bosch B18IF905SP compares
The freezer class we track runs from $25 to $120 a year. At $75/yr, it sits right on the class median of $75, and it is about $50 a year more than the cheapest freezer to run at $25. Against the US federal standard model for its class at about $92/yr, the Bosch B18IF905SP uses 20% less energy.
What drives its running cost
At 8.6 cu ft, the Bosch B18IF905SP is a small freezer for its class, which spans 1.1 to 23 cu ft with a median of 13.8 cu ft, and smaller freezer models generally cost less to run for the same job, all else being equal.
- Interior volume. As with refrigerators, more cubic feet of frozen storage generally means a bigger compressor and a higher annual energy figure.
- Insulation and defrost type. Better-insulated cabinets lose less cold to the surrounding room, and frost-free (automatic-defrost) freezers run a periodic heating element that a manual-defrost model does not.
- Chest vs upright design. Door orientation affects how much cold air escapes per opening: top-opening chest designs generally hold cold better than front-opening upright ones.
Common questions
Is the Bosch B18IF905SP cheap to run?
Roughly, yes. Its $75/yr figure is close to the class median, ranking #310 of 622, neither a bargain nor a splurge on running cost.
How much does the Bosch B18IF905SP cost per month?
About $6.25 a month, which is the $75 annual estimate spread across twelve months at the US average rate of $0.1856/kWh. Your own bill scales with your local electricity rate and how heavily you use it.
How is this running-cost figure calculated?
The formula is annual kWh times price per kWh: 404 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $75 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Bosch B18IF905SP for its size?
22nd percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 309 | Sub-Zero ID-30FI5.1 cu ft | $74 |
| 308 | Wood'S WUF140W14.1 cu ft | $74 |
| 307 | Wood'S WUF140SL14.1 cu ft | $74 |
| 306 | Fisher & Paykel RS24F*E*12.6 cu ft | $74 |
| 305 | Ge FUF14DL****14.1 cu ft | $74 |
Source
ES_0031649_B18IF905SP_08312020054816_80044911View certified freezer listingsENERGY STAR data as of July 2026Bosch and B18IF905SP 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.