How Much Does a Tankless Water Heater Save Per Year? Save $108!

Is Your Old Water Heater Draining Your Wallet? Here’s What Tankless Can Save You

How much does a tankless water heater save per year depends on your fuel type, household size, and daily hot water use — but here are the numbers most homeowners need to know:

Scenario	Estimated Annual Savings
Gas tankless vs. gas tank (DOE average)	~$108/year
ENERGY STAR gas tankless vs. standard gas tank	~$95/year (family of four)
Electric tankless vs. electric tank	~$44/year
High-efficiency condensing tankless vs. standard tank	Up to $124/year

Water heating is the second largest energy expense in most U.S. homes. A traditional storage tank keeps 40 to 50 gallons of water hot around the clock — whether you need it or not. That constant reheating, known as standby heat loss, quietly chips away at your energy budget every single day.

Tankless water heaters work differently. They heat water only when you turn on the tap, eliminating standby loss entirely. According to the U.S. Department of Energy, homes using 41 gallons or less of hot water daily can be 24% to 34% more energy efficient with a tankless system. Even high-usage homes see meaningful gains.

For homeowners in Riverside and San Bernardino counties, where energy costs continue to rise in 2026, those savings add up fast over a 20-year lifespan.

How Much Does a Tankless Water Heater Save Per Year?

When we look at the raw data from the U.S. Department of Energy (DOE) and ENERGY STAR, the financial picture becomes clear. For the average American household, the answer to how much does a tankless water heater save per year typically falls between $44 and $108 in direct energy costs. However, these figures are just the baseline.

The real magic happens through efficiency gains. For homes that use a modest amount of hot water (around 41 gallons or less per day), tankless units are 24% to 34% more energy-efficient than traditional tanks. Even in busy households using upwards of 86 gallons a day, you are still looking at an 8% to 14% improvement in efficiency.

Understanding the advantages of upgrading to a tankless water heater goes beyond just the monthly bill. You are also removing the risk of a 50-gallon flood in your garage or closet, which is a “saving” that’s hard to quantify until it happens to you.

Water Heater Type	Typical Energy Factor (UEF)	Estimated Annual Energy Consumption
Standard Gas Tank	0.58 – 0.62	250 – 300 Therms
Gas Tankless	0.81 – 0.96	170 – 210 Therms
Standard Electric Tank	0.90 – 0.95	3,200 – 3,500 kWh
Electric Tankless	0.98+	2,800 – 3,100 kWh

How Much Does a Tankless Water Heater Save Per Year for Riverside Families?

In our local area, including Colton and Grand Terrace, gas prices and weather patterns play a huge role. For a typical family of four in Riverside, switching to an ENERGY STAR certified gas tankless model can save roughly $95 per year on gas bills compared to a standard storage tank.

Because our groundwater in Southern California doesn’t get as bone-chillingly cold as it does in the Midwest, our units don’t have to work quite as hard to reach your desired temperature. This regional advantage often means your unit operates at peak efficiency more often. If you’re curious about how these systems perform specifically in our climate, check out our Tankless Water Heater San Bernardino County Guide for localized insights.

How Much Does a Tankless Water Heater Save Per Year with ENERGY STAR Models?

Not all tankless heaters are created equal. If you opt for an ENERGY STAR certified model, the DOE estimates an average annual saving of $108. The “secret sauce” here is often condensing technology.

Condensing tankless heaters use a second heat exchanger to capture extra heat from the exhaust gases that would otherwise be wasted. This pushes the Uniform Energy Factor (UEF) to 0.90 or higher. For example, some top-tier condensing units can save a family of four an additional $20 annually compared to a non-condensing tankless model. When selecting a unit, it’s helpful to consult a Tankless Water Heater Brands Guide to see which manufacturers are leading the way in condensing technology.

Key Factors Influencing Your Annual Energy Savings

While the averages are helpful, your actual savings will fluctuate based on a few “real-world” variables. We often tell our neighbors in Grand Terrace that their mileage may vary based on:

• Groundwater Temperature: The colder the water coming into your home, the more energy is required to heat it.
• Daily Demand: As mentioned, low-usage homes see the highest percentage of efficiency gains, but high-usage homes see the highest “total dollar” savings because they are using more energy overall.
• Fuel Type: Gas generally offers higher raw dollar savings per year than electric, simply because of the way utility rates are structured in California.
• Unit Sizing: If your unit is too small, it will struggle to keep up, potentially negating some efficiency. Refer to our Tankless Water Heater Sizing Guide to ensure you get the right fit for your floor plan.

Gas vs. Electric Savings Breakdown

The choice between gas and electric is often dictated by what is already in your home.

• Gas Tankless: These are the heavy hitters. They save about $108 per year on average. They offer higher flow rates, making them ideal for whole-house applications in Riverside.
• Electric Tankless: These save about $44 per year compared to electric tanks. While the savings are more modest, the units themselves are often easier to place in tight spaces. For a deep dive into these models, our Electric Tankless Water Heater Guide covers everything from amperage requirements to performance expectations.

Maximizing ROI Through Longevity and Maintenance

If you only look at the annual energy bill, you’re missing half the story. The true ROI of a tankless system comes from its lifespan. A traditional tank is usually on borrowed time after 10 or 12 years. In contrast, a well-maintained tankless water heater can easily last 20 years or more.

By avoiding a full replacement cycle (buying one tankless unit instead of two tank units over 20 years), you are saving thousands of dollars in equipment and labor. However, this longevity depends entirely on how you treat the unit. Hard water is the primary “tankless killer” in San Bernardino County. Mineral scale can coat the heat exchanger, forcing the unit to run longer and hotter to produce the same amount of hot water, which kills your efficiency.

We recommend maintaining your tankless water heater tips for longevity and efficiency such as annual descaling. This simple service ensures that your annual savings don’t vanish due to scale buildup.

Frequently Asked Questions about Tankless Savings

Do tankless water heaters save money on water bills?

While they are primarily “energy savers,” they can indirectly save on water. Because tankless units are often smaller, they can sometimes be installed closer to the point of use (like a master bathroom), meaning you don’t have to run the tap for two minutes waiting for the cold water to clear the pipes. Furthermore, many modern units use advanced flow rate sensors to ensure no water is heated unnecessarily.

What are the 2026 tax credits for tankless upgrades?

As of April 2026, federal tax credits remain a powerful incentive. Under the current energy efficiency programs, homeowners can often claim a credit for 30% of the project cost, capped at specific amounts (often around $600 for high-efficiency gas tankless units). When combined with local utility rebates in Riverside, these incentives can significantly lower the net investment.

Is a tankless heater worth it for a small household?

Absolutely. In fact, small households (1-2 people) often see the highest efficiency spike — up to 34%. Because a small household uses hot water sporadically, a traditional tank spends most of its life heating water that no one is using. A tankless unit eliminates this waste entirely, making it a very smart long-term play for smaller homes.

Conclusion

At Top Tier Plumbing and Air, we’ve seen how a smart upgrade can transform a home’s utility budget. While the question of how much does a tankless water heater save per year has a clear answer in terms of energy bills, the added benefits of endless hot water, space savings, and a 20-year lifespan make it a winning investment for most Riverside and San Bernardino residents.

Whether you are in Colton, Grand Terrace, or the surrounding areas, our team is available 24/7 to help you navigate your options. We pride ourselves on upfront pricing and quality work done right the first time.

Ready to stop heating water you aren’t using? Start your energy-saving upgrade today with the local experts at Top Tier Plumbing and Air.