Model
Samsung QN115QN90FF
Rank #172 means 171 of the 172 television models we track cost less to run each year; the 0th efficiency percentile means it uses less energy for its size than 0% of those models.
What does the Samsung QN115QN90FF cost to run per year?
The Samsung QN115QN90FF costs about $117 a year to run, near the very top of the cost table for its class at rank #172 of 172. Size-adjusted, this model ranks at the very bottom of its class on efficiency, ahead of just 0% of television models we track. Its on-mode draw of 343.5 W is the number ENERGY STAR measures directly and the one this running-cost figure is built from.
On the leaderboard, the Samsung QN85QN95DAF at $77/yr runs a little cheaper, the closest neighbor to its exact spot in the ranking. A television typically stays in service for somewhere around 7 years; over that span, the Samsung QN115QN90FF's $117/yr adds up to roughly $819 in electricity alone, before purchase price or repairs. At rank #172 of 172, it sits at the very top of the cost range for its class, among the single priciest models we track to run.
By the numbers
The Samsung QN115QN90FF 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 $117/yr, here is what the Samsung QN115QN90FF adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Samsung QN115QN90FF costs about $1170. That is roughly $820 more than the class median, which would run closer to $350 over the same ten years.
How the Samsung QN115QN90FF compares
The television class we track runs from $3 to $117 a year. At $117/yr, it runs about $82 a year above the class median of $35, and it is about $114 a year more than the cheapest television to run at $3.
What drives its running cost
At 114.4 in, the Samsung QN115QN90FF is a large television for its class, which spans 13.23 to 114.4 in with a median of 55 in, size is usually the single biggest lever behind a running-cost figure, and at this end of the range there is more capacity to service, which tends to push the number up. 343.5 W is the on-mode draw behind this figure (the class spans 9.3 to 343.5 W); two otherwise similar TVs can differ here mostly on picture-mode defaults rather than panel technology.
- On-mode brightness. On-mode watts, the figure ENERGY STAR measures at the factory picture setting, can differ a lot from what a TV actually draws once you change the picture mode.
- Screen size. Screen size is the single strongest predictor of a TV's on-mode wattage, ahead of panel technology or brand.
- Hours of use. Running cost compounds with hours of use, so this figure is really a per-hour rate multiplied by a standard viewing assumption, not a fixed annual bill.
Common questions
Is the Samsung QN115QN90FF cheap to run?
Its $117/yr running cost, rank #172 of 172, is above what most television models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Samsung QN115QN90FF cost per month?
About $9.76 a month, which is the $117 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: 631 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $117 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Samsung QN115QN90FF for its size?
0th 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 |
|---|---|---|
| 171 | Samsung QN85QN95DAF84.6 in | $77 |
| 170 | Samsung QN83S95FAE83.5 in | $74 |
| 169 | Samsung QN85QN90DAF84.6 in | $72 |
| 168 | Lg OLED83C5P**82.5 in | $70 |
| 167 | Lg OLED83G5***82.5 in | $70 |
Source
ES_1023593_QN115QN90FF_06092025040689_5180749View certified television listingsENERGY STAR data as of July 2026Samsung and QN115QN90FF 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.