How to Lower Your Water Heating Bill: 15 Proven Ways

Your water heater can be a significant part of your household energy bill, but lowering the cost does not always require buying a new appliance. Small changes—such as reducing hot water waste, insulating accessible pipes, fixing leaks, and choosing efficient settings—can help you spend less without sacrificing comfort.

This guide covers 15 practical ways to lower your water heating bill, from free habit changes to larger upgrades that may pay off over time. The examples focus on U.S. homes, where energy prices, plumbing codes, and available incentives vary by location.

In This Guide

The Quickest Ways to Lower Your Water Heating Bill

If you want to start today, focus on changes that cost little or nothing:

Check whether your water heater can safely be set to 120°F.
Take shorter showers and install a WaterSense-labeled showerhead when appropriate.
Fix dripping hot-water faucets and leaking hot-water pipes.
Wash clothes with cold water whenever the fabric and cleaning task allow it.
Insulate accessible hot-water pipes where appropriate.
Use your heat pump water heater’s efficient operating mode, if you have one.

These measures are generally less expensive than replacing equipment. Larger upgrades can deliver more substantial savings in some homes, but their value depends on installation costs, fuel prices, existing equipment, and how much hot water your household uses.

15 Ways to Lower Your Water Heating Bill

1. Set the Water Heater to 120°F When Appropriate

Many households can use a water heater setting of 120°F instead of a higher setting. Lowering the storage temperature can reduce standby heat loss and the energy required to maintain hotter water.

The U.S. Department of Energy commonly recommends 120°F for many homes. However, the right setting depends on your equipment, plumbing system, household needs, and any applicable health or building requirements. Some dishwashers or other appliances may have specific hot-water requirements.

Safety note: Do not lower the temperature without considering manufacturer guidance and the risk of Legionella bacteria, especially if someone in the home is medically vulnerable or the plumbing system has special requirements. Follow local public-health advice and consult a qualified professional if you are unsure. Use appropriate anti-scald protection where needed.

2. Take Shorter Showers

Every gallon of hot water you do not use is a gallon your water heater does not need to heat. Reducing shower time is one of the simplest ways to cut both water use and water-heating energy.

Try shortening each shower by a few minutes, especially in a household where several people shower every day. A shower timer can help you build the habit without requiring a major lifestyle change.

3. Install a WaterSense-Labeled Showerhead

A high-efficiency showerhead can reduce the amount of water flowing through the shower while maintaining a satisfying spray. Look for the U.S. EPA’s WaterSense label and check the product’s flow rate and compatibility with your shower.

Using less hot water means less energy is needed to heat it. Actual savings depend on the old showerhead’s flow rate, shower duration, water temperature, and local water and energy prices.

4. Repair Dripping Hot-Water Faucets and Leaks

A dripping hot-water faucet wastes heated water. A leak from a hot-water pipe can also waste energy continuously, depending on where the water escapes and how much heat is lost.

Repair dripping faucets, running fixtures, and accessible plumbing leaks promptly. If the water heater itself is leaking, identify the source before assuming a simple repair will solve it. A leaking tank can indicate a serious problem.

For troubleshooting, see our guide to water heaters leaking from the top.

5. Wash Clothes in Cold Water

When the fabric, detergent, and type of soil allow it, use cold water for laundry. Many washing-machine cycles can clean everyday clothing without using heated water.

This change can reduce the energy used to heat water for laundry. Follow garment labels and use warmer cycles when hygiene requirements, heavily soiled items, or appliance instructions call for them.

6. Run the Dishwasher Efficiently

Use the dishwasher’s energy-saving or eco cycle when it meets your needs, and run full loads rather than several small loads. Check the manufacturer’s instructions before changing the hot-water supply or disabling any built-in heating features.

Modern dishwashers may heat water internally, so the impact on your water heater varies by appliance. Avoid pre-rinsing dishes under running hot water when scraping food into the trash or compost is sufficient.

7. Insulate Accessible Hot-Water Pipes

Hot water can lose heat while traveling through exposed pipes, especially in unheated basements, garages, crawl spaces, and utility areas. Suitable pipe insulation can help keep water warmer and may reduce the wait for hot water at a fixture.

Use insulation rated for the pipe material and operating temperature. Keep insulation away from flues, burners, and other hot surfaces, and follow all manufacturer and local-code requirements. Do not cover valves, service points, or components that must remain accessible.

8. Insulate the Water Heater Tank Only When Appropriate

An insulation blanket may reduce standby heat loss from some older storage water heaters. However, many newer tanks are already well insulated and may not benefit enough to justify an additional blanket.

Check the water heater manual and manufacturer recommendations before adding insulation. Never cover controls, warning labels, access panels, air intakes, draft hoods, or exhaust vents. Do not add a blanket to a gas water heater unless the manufacturer specifically permits it and the installation can be done safely.

9. Fix Problems That Make You Wait Too Long for Hot Water

If you routinely run the faucet for a long time before hot water arrives, some water and energy may be wasted. The cause could be a long pipe run, poor pipe insulation, an undersized or poorly configured system, or a plumbing issue.

Start by insulating accessible hot-water pipes and checking for plumbing problems. A demand-controlled hot-water recirculation system may help in some homes, but it costs money to install and can increase energy use if it runs continuously or is poorly configured.

Compare installation costs and operating requirements before buying a recirculation pump. A solution that saves water does not automatically save energy in every home.

10. Use the Right Operating Mode on a Heat Pump Water Heater

If you own a hybrid heat pump water heater, review the operating modes in the manual. An efficiency or heat-pump mode generally prioritizes the heat pump, while a resistance-only or high-demand mode can use substantially more electricity.

For everyday use, try the manufacturer’s recommended efficient or hybrid setting if it provides enough hot water for your household. Reserve high-demand modes for situations when they are actually needed, and use vacation mode when appropriate and supported by the model.

Learn more in our guides to heat pump water heater pros and cons and heat pump water heater vs. tankless systems.

11. Check for Utility Time-of-Use Savings

Some electric utilities offer time-of-use rates, demand-response programs, or incentives for connected water heaters. If your utility charges less for electricity at certain hours, shifting some water heating to lower-cost periods may reduce your bill.

Whether this works depends on your rate plan, equipment controls, hot-water demand, and the amount of heat the tank loses while waiting. Do not install a timer or disable safety controls without checking the manufacturer’s instructions and local requirements.

12. Choose a Water Heater That Is Properly Sized

A water heater should supply enough hot water for your household without being unnecessarily large for the way you use it. Sizing is not just about the number of people in the home: peak demand, incoming water temperature, fixture flow rates, and recovery performance all matter.

Do not replace a working water heater solely because you suspect it is oversized. Instead, consider proper sizing when the unit is nearing the end of its life or your household’s hot-water needs change.

Use our guides to choosing the right water heater size and sizing a tankless water heater.

13. Replace an Inefficient Electric Tank with a Heat Pump Water Heater

If your current electric resistance water heater is old or due for replacement, consider an ENERGY STAR-certified heat pump water heater. Rather than generating all its heat directly with resistance elements, it moves heat from surrounding air into the water.

ENERGY STAR estimates that a certified heat pump water heater can save a household of four approximately $550 per year compared with a standard electric model, based on its published assumptions. Your actual savings may be higher or lower depending on electricity prices, hot-water use, climate, installation conditions, and operating mode.

Heat pump water heaters generally have a higher upfront cost and need suitable space, airflow, and condensate drainage. Compare the installed price and available incentives before deciding.

Read our review of the Rheem ProTerra hybrid heat pump water heater and our overview of the best heat pump water heaters.

14. Compare Energy Costs Before Switching Fuel Types

Electricity is not always cheaper than natural gas, and natural gas is not always cheaper than electricity. The lowest-cost option depends on local rates, equipment efficiency, household hot-water use, and installation expenses.

Before switching from gas to electric—or the other way around—compare estimated annual operating costs as well as installation and maintenance costs. A fuel conversion can require electrical upgrades, gas-line work, venting changes, or other modifications.

Use our comparison of gas vs. electric water heaters and our guide to monthly water heater operating costs.

15. Claim Eligible Rebates and Plan Replacements Ahead of Time

A rebate does not reduce the energy your current water heater uses, but it can lower the cost of upgrading to a more efficient model. Check your utility, state energy office, and the ENERGY STAR Rebate Finder for current offers and eligibility rules.

Programs, funding, deadlines, and qualifying products vary by location. Confirm the terms before buying, and do not assume that a federal tax credit or state program is available for every 2026 installation.

Planning before your old unit fails gives you time to compare equipment, obtain installation quotes, and check incentives. Start with our guide to water heater rebates in 2026 and our article on heat pump water heater tax credits in 2026.

Which Changes Should You Try First?

The best starting point is usually the least expensive action that addresses a real source of waste in your home. Use this table as a practical guide rather than a guarantee of specific savings.

Measure	Typical upfront cost	Potential benefit	Best for
Shorter showers	Free	Lower hot-water use	Households with frequent or long showers
Appropriate 120°F setting	Usually free	May reduce standby losses	Homes where this setting is safe and suitable
Repair hot-water leaks	Varies	Stops wasted heated water	Homes with dripping fixtures or leaking pipes
Cold-water laundry	Free if the washer supports it	Less energy for laundry water heating	Everyday laundry loads
WaterSense showerhead	Low to moderate	Less water and heating energy	Homes with older, high-flow showerheads
Hot-water pipe insulation	Low to moderate	Less heat loss from accessible pipes	Exposed pipes in cooler spaces
Heat pump water heater	Higher upfront investment	Potentially substantial electricity savings	Homes replacing a standard electric tank
Utility rebates or special rates	Depends on program	Lower upgrade cost or operating cost	Customers with eligible local programs

There is no universal percentage that every household can save. A home with long showers, high-flow fixtures, and exposed hot-water pipes may have different opportunities from a household that already uses little hot water and has an efficient system.

How to Measure Your Water Heating Savings

Water heating costs can be hard to isolate when the same utility bill also includes heating, cooling, cooking, and other appliances. Use a consistent method to see whether your changes are helping.

Record a baseline. Save two or three utility bills and note the billing period, total energy use, and current energy rates.
Change a few things first. Start with habits, leak repairs, or one low-cost improvement so you can understand what changed.
Compare similar periods. Account for differences in household size, visitors, weather, and hot-water use.
Check your rate plan. A change in price per kilowatt-hour or therm can alter the bill even when energy consumption stays the same.
Estimate upgrade payback. Divide the additional upfront cost by estimated annual bill savings. Include installation costs and subtract confirmed rebates, but avoid treating estimates as guaranteed results.

For a rough estimate of your current running costs, read How Much Does It Cost to Run a Water Heater Per Month?

Common Mistakes That Can Reduce Your Savings

Turning the temperature down too far: Follow equipment guidance and account for water-safety requirements.
Buying a tank blanket without checking the manual: Some modern tanks are already insulated, and improper insulation can create hazards.
Assuming a timer always saves money: Savings depend on the rate plan, system, schedule, and heat losses.
Replacing equipment before comparing total costs: A more efficient unit may cost more upfront, so estimate its lifetime operating cost and available incentives.
Ignoring a leaking tank: A persistent leak can indicate a failing water heater and may cause property damage.

Frequently Asked Questions

What is the cheapest way to lower a water heating bill?

Start by using less hot water: take shorter showers, wash suitable laundry loads in cold water, avoid unnecessary hot-water pre-rinsing, and repair dripping hot-water fixtures. These changes generally cost little or nothing.

Does setting a water heater to 120°F save money?

It can. A 120°F setting may reduce standby heat loss and heating costs in many homes. However, equipment instructions, household needs, plumbing design, and public-health guidance matter. Do not lower the setting without considering water-safety requirements.

Do low-flow showerheads really lower energy bills?

They can reduce the volume of hot water used during showers, which can lower water-heating energy use. Savings depend on the old showerhead’s flow rate, shower length, and local utility prices.

Does insulating a water heater save money?

It may help older storage tanks that have significant standby heat loss, but many newer units are already well insulated. Check the manufacturer’s guidance before adding a blanket, and never cover controls, vents, or other components that must remain exposed.

Will a heat pump water heater lower my bill?

It can significantly reduce electricity use compared with a standard electric resistance tank. Actual bill savings depend on local electricity rates, hot-water demand, installation conditions, and the unit’s operating mode. It may not be the lowest-cost choice in every home or compared with every fuel type.

Should I turn my water heater off when I leave home?

For longer absences, use the manufacturer’s vacation setting if available and appropriate. Turning a system completely off may not be suitable for every installation, and the best approach depends on the type of water heater, duration of absence, and water-safety requirements.

How much can I save each month?

There is no single reliable amount for every household. Your savings depend on the current heater, fuel type, local rates, household size, hot-water habits, and which improvements you make. Track energy use and compare similar billing periods to estimate your actual results.

Official Resources for More Water Heating Savings

Final Takeaway

The most effective way to lower your water heating bill is to match the solution to the source of waste. Start with shorter showers, cold-water laundry, leak repairs, sensible temperature settings, and pipe insulation where appropriate. If your water heater is old or inefficient, compare replacement options and calculate the full cost—including installation and any confirmed incentives—before investing.

Disclaimer: This article is for general educational purposes and is not a substitute for manufacturer instructions, local plumbing and electrical codes, or advice from a qualified professional. Water temperature changes and water-heater modifications can affect scalding, equipment operation, and microbial safety. Verify current utility rates and incentive terms before making a purchase.

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