Bills

Time-of-Use Savings Calculator

By HowMuchWatts Editorial Team Reviewed June 30, 2026 Formula and source method

On a time-of-use tariff, running appliances at off-peak times costs far less. This calculator estimates your savings from shifting usage.

Change any number below — your result updates instantly, no button to click.

Your details

Results

Daily saving

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Monthly saving

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Yearly saving

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Written & maintained by the HowMuchWatts team · Last updated June 30, 2026 · How we verify our numbers

How it works

Daily saving = shiftable kWh × (peak rate − off-peak rate). Monthly = daily × 30.4; yearly = daily × 365. The bigger the gap between your peak and off-peak rates, the more shifting usage is worth.

Frequently asked questions

What can I shift to off-peak?

Anything flexible: dishwasher, washing machine, tumble dryer, EV charging, and battery or hot-water heating. Timers and smart plugs make it automatic.

Is a time-of-use tariff worth it?

If you can move a meaningful share of usage to off-peak, often yes. If most of your use is during peak hours, a flat tariff may be cheaper.

Does this include standing charges?

No — it only shows the saving from shifting usage. Compare full tariffs (including standing charges) with our electricity bill calculator.

These calculators provide general estimates for educational purposes only and are not financial advice. Real-world results depend on factors not captured here. Verify figures independently before making any purchase or financial decision.

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<iframe src="https://howmuchwatts.com/embed/time-of-use-savings-calculator/" title="Time-of-Use Savings Calculator" width="100%" height="640" style="border:1px solid #e3e8ef;border-radius:12px;max-width:760px;" loading="lazy"></iframe>
<p style="font:13px sans-serif;">Calculator by <a href="https://howmuchwatts.com/calculators/time-of-use-savings-calculator/">HowMuchWatts</a></p>

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