Is it cheaper to run the dishwasher at night?

Is It Cheaper to Run the Dishwasher at Night?

Many of us run the dishwasher without thinking twice—but the timing might matter more than you think. Yes, it’s often cheaper to run your dishwasher at night, especially during off-peak hours when electricity demand drops and rates go down.

Most utility companies operate on a tiered pricing system, where energy costs less when overall usage is low. That typically means late evening to early morning—think 10 p.m. to 7 a.m., though exact times vary. Running your dishwasher during these hours can lead to noticeable savings over time, especially if you're on a time-of-use billing plan.

But here's the catch: not all areas follow the same energy schedule. Off-peak hours depend on your location and provider. In some places, “nighttime” discounts might start as early as 8 p.m., while others don’t kick in until midnight. The best move? Check your utility provider’s website or bill for specific off-peak windows. Some companies even offer real-time rate trackers through their apps.

Modern dishwashers are already energy-efficient, but pairing smart timing with efficient appliances maximizes savings. And while the difference per cycle might seem small—a few cents here and there—it adds up over months and years.

Of course, if you live alone and run small loads, the financial impact is minor. But for larger households or those aiming to reduce their energy footprint, scheduling that evening wash isn’t just convenient—it’s practical.

So, while dishwashing after dinner might feel natural, waiting until later—or using a delay start feature—could be a simple way to save. With just a little planning, you’re not just cleaning dishes; you’re optimizing your energy use.