Time-of-Use Electricity Rates: How to Save With Them

Time-of-use (TOU) rates flip the usual pricing model on its head. Instead of one flat price per kilowatt-hour all day, you pay more when the grid is stressed and less when it is quiet. For households willing to shift a few habits, TOU plans can cut costs meaningfully. For those who cannot, they can backfire.

How time-of-use pricing works

A TOU plan divides the day into pricing windows, typically three:

• Peak — the most expensive hours, when demand across the grid is highest. This is usually a block in the late afternoon and evening, often around 4 p.m. to 9 p.m.
• Off-peak — the cheapest hours, overnight and often in the early morning.
• Mid-peak / partial-peak — a shoulder rate between the two, on some plans.

The gap between peak and off-peak can be substantial. On many plans peak power costs two to three times the off-peak price, and on some it is even wider. Rates also shift by season, with summer peaks usually the steepest because of air-conditioning demand.

Is a TOU plan right for you?

The math is simple in principle: if you can move enough usage out of the expensive window, you win. Ask yourself when your biggest loads run. The heaviest household users are typically:

• Air conditioning and electric heat
• Electric water heaters
• Clothes dryers and dishwashers
• EV charging
• Pool pumps

If most of that runs in the evening and cannot move, a TOU plan may cost you more than a flat rate. But if you can shift even a few of these loads, the savings can be real.

Practical ways to shift usage

You do not have to reorganize your life. A handful of changes capture most of the benefit:

1. Pre-cool or pre-heat. Run the AC or heat hard just before the peak window begins, then ease off during peak. A programmable or smart thermostat automates this.
2. Delay big appliances. Use the delay-start timer on dishwashers and washers so they run after peak ends. Dry clothes late evening or early morning.
3. Charge the EV overnight. This is the single biggest win for most EV households. Set the car or charger to start after off-peak begins.
4. Shift the water heater. A timer on an electric water heater can heat a tank off-peak that carries you through the evening.
5. Move flexible loads to midday. If you have solar, midday is often both a low-rate window and when your panels produce most, a powerful combination.

Watch the details before enrolling

Not all TOU plans are equal, and the fine print matters:

• Peak window timing. A 4–9 p.m. peak is harder to avoid than a 2–7 p.m. one because it overlaps dinner and evening life. Know the exact hours.
• Weekends and holidays. Many plans treat weekends as all off-peak, which is a bonus for chores and EV charging.
• Seasonal changes. Confirm how summer and winter rates and windows differ.
• Baseline or minimum charges. Some plans pair TOU pricing with a fixed monthly fee.
• Exit rules. Check whether you can switch back to a flat rate and how soon.

Track your first few months

Treat the first two or three billing cycles as an experiment. Most utilities show your usage by hour in an online portal. Look at how much of your consumption still lands in the peak window and target the largest remaining loads. Small adjustments compound, and many households only unlock the full savings after they see where their peak usage is actually coming from.

If after a few cycles your bill is higher than it was on a flat rate and you have already shifted what you can, switching back is a legitimate choice. TOU rates reward flexibility, and there is no penalty in admitting your household does not have much to give.

Bottom line

Time-of-use rates pay off when you can move heavy loads out of the late-afternoon and evening peak. EV charging, laundry, dishwashing, and pre-cooling are the easiest wins. Learn your plan's exact peak hours, run an experiment for a few cycles using your utility's hourly data, and keep the flat-rate option in your back pocket if the numbers do not work.