Outdoor & Garage · Northeast
Cost to run a sump pump in District of Columbia
At District of Columbia’s average residential rate of 25.40¢ per kWh, a sump pump drawing 800W for 1 hour a day costs about $1.86 a month. Change the numbers below to match how you actually use yours.
Quick answer
Based on 800W at a 30% duty cycle (this equipment cycles on and off rather than drawing full power continuously) and 25.40¢/kWh, the District of Columbia average for May 2026.
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— per year
Why the cost differs in District of Columbia
District of Columbia has the 42nd cheapest residential electricity of the 51 US states and territories we track, at 25.40¢ per kWh against a national average of 18.44¢. That is +37.7% compared with the national figure. The District is an entirely urban service territory with no generation of its own, so every kilowatt-hour arrives over transmission and the cost profile is dominated by distribution and delivery charges rather than fuel. Retail choice is available. Dense building stock means a high share of apartments, where cooling load per household is lower than the national norm but heating is often electric.
For this appliance specifically, the difference works out to an extra $6.10 a year over what the same sump pump would cost at the national average rate. Run the identical appliance in Hawaii and it would cost $45.55 a year; in Idaho it would cost $10.82. That spread of $34.73 is entirely down to location.
That works out to roughly 0.8% of a typical District of Columbia household's annual electricity bill - modest individually, though appliances in this range add up.
District of Columbia sits above the national average, so the running cost of this sump pump is modestly higher than a typical US household would pay. Usage habits still matter more than location at this rate level.
Because District of Columbia has retail supplier choice, the state average blends many different contracted rates. If you have shopped for a plan, your own price per kWh is the number to put in the calculator.
| Location | Rate | Per month | Per year |
|---|---|---|---|
| District of Columbia this page | 25.40¢ | $1.86 | $22.25 |
| US average | 18.44¢ | $1.35 | $16.15 |
| Idaho cheapest state | 12.35¢ | $0.90 | $10.82 |
| Hawaii most expensive | 52.00¢ | $3.80 | $45.55 |
District of Columbia electricity rate trend
Rates in District of Columbia have moved from 22.70¢ to 25.40¢ per kWh over the last twelve months of published data. Nationally, residential rates rose about 6.2% year over year.
2025-06 to 2026-05 · cents per kWh
About running a sump pump
Runs intermittently and only in wet conditions, so annual cost is modest and highly variable by climate and season. A pump cycling in dry weather usually indicates a stuck float or groundwater issue worth investigating.
What actually changes the cost
- Nameplate wattage is not running cost. This sump pump draws about 800W when active, but cycles roughly 30% of the time it is switched on, so effective consumption is near 240W.
- Models vary widely, from about 400W to 1200W. Check the nameplate on your own unit rather than assuming an average, because the spread is more than 2x.
- If your utility offers time-of-use pricing, shifting this load off-peak can cut its cost substantially without using any less energy.
How we worked this out
The arithmetic is simple and we would rather show it than hide it. Divide watts by 1,000 to get kilowatts, multiply by hours of use and by the duty cycle to get kilowatt-hours, then multiply by your rate:
800W ÷ 1000 × 1h × 30% = 0.240 kWh/day × 25.40¢ = $0.061 per day
One honest caveat: District of Columbia’s figure is a state average published by the EIA. Your own utility’s tariff, any time-of-use pricing, fixed monthly service charges and local taxes all shift the real number. Put your actual per-kWh rate into the calculator above for a figure that reflects your bill.
Questions about sump pump running costs
How many watts does a sump pump use?
A typical sump pump draws about 800 watts while running, with most models falling between 400W and 1200W. Check the nameplate label or manual for your specific unit - the range is wide enough that averages can mislead.
How much electricity does a sump pump use per day?
At around 1 hour of use a day and a 30% duty cycle, that works out to roughly 0.24 kWh per day, or about 7 kWh a month. Your actual figure depends on your usage and model.
Why does the cost differ so much between states?
Residential electricity rates across the US range from about 12.35 cents per kWh in North Dakota to 46.62 cents in Hawaii - nearly a fourfold difference. The same sump pump, used identically, therefore costs almost four times as much to run in the most expensive state as in the cheapest.
Is it cheaper to run a sump pump at night?
Only if you are on a time-of-use or variable tariff. On a flat rate, the time of day makes no difference to cost. If you are on time-of-use pricing, off-peak hours are typically materially cheaper, and shifting this load can reduce its cost without reducing usage.