Will a Tankless Water Heater Save Money?

Find out if a tankless water heater is a smart financial choice for your home and family.

Our calculator uses ZIP-specific data—including local water temperatures, energy rates, and usage patterns—to give you personalized savings results tailored to your home.

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    Tankless Water Heater Savings Calculator | Free ROI Calculator 2025

    Tankless Water Heater Savings Calculator

    Calculate your exact savings and payback period in 60 seconds

    100% free Personalized results No email required

    Question 1 of 5

    Where's your home?

    We'll use this to estimate your water temperature and typical energy rates.

    ✓ No email required  •  ✓ Instant results  •  ✓ 100% free

    Question 2 of 5

    How many people live in your home?

    This helps us estimate your hot water needs.

    Question 3 of 5

    How much hot water do you use?

    Think about showers, laundry, and dishes. Pick what sounds most like your household.

    Question 4 of 5

    What heats your water now?

    Check your utility bill or look at your current water heater.

    Question 5 of 7

    What do you pay for gas?

    Check your latest utility bill. We've filled in the Texas average, but you can adjust it.

    $ /therm

    Not sure? The average is fine—you can always adjust later.

    Bonus Question 1 of 2
    Boost Your Savings

    Are you eligible for any rebates?

    Many Texas utility companies and cities offer rebates for energy-efficient upgrades. This can significantly improve your payback!

    Search for rebates in your area

    Bonus Question 2 of 2
    Long-Term Value

    Planning to sell your home someday?

    Tankless water heaters are a desirable upgrade that can increase your home's resale value. Should we include this in your calculation?

    Did you know? Real estate studies show modern, energy-efficient upgrades like tankless water heaters can add $1,500-$3,000 to home value. We'll use a conservative $2,000 estimate.

    Calculating Your Savings...

    Calculating...

    Ready to Start Saving?

    Get a free, no-obligation estimate from Reliant Plumbing

    Or call us: 512-900-3549

    Your Savings Over Time

    The Numbers

    Tank Water Heater
    $XXX/year
    Tankless
    $XXX/year
    Endless Hot Water
    Never run out during back-to-back showers. Perfect for families!
    Space Saver
    Wall-mounted. Reclaim your closet or garage space!
    Lasts 2x Longer
    20+ years vs 10-12 for tanks. Better long-term value!
    Eco-Friendly
    Lower energy use = smaller carbon footprint
    Boosts Home Value
    Modern upgrade buyers love to see
    No Tank Leaks
    Eliminate the risk of 40+ gallon floods

    Ways to Make It Even Better

    Ready to Start Saving?

    Get a free, no-obligation estimate from Reliant Plumbing

    Or call us: 512-900-3549

    Service Areas

    Reliant Plumbing serves Austin, San Antonio, Dallas-Fort Worth, and Waco with expert tankless water heater installation.

    Show detailed calculations

    How Tankless Water Heaters Cut Down Utility Bills

    When energy costs cause a squeeze on the budget, or homeowners are looking for more sustainable purchases, a tankless water heater can be a great investment to help manage the household expenses. According to experts at Consumer Reports, water heaters are typically the second leading source of energy usage, just behind heating or cooling a home.

    Tankless water heaters work by heating water directly as it flows through the system. This mechanism is powered by gas or electricity. Instead of storing water in a tank like a traditional tank-style water heater, this enables the unit to deliver hot water on demand.

    This on-demand approach boosts efficiency and dramatically reduces total energy consumption.

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    Frequently Asked Questions About Tankless Water Heaters

    Most Texas homeowners see payback in 5–10 years, depending on household size, energy rates, and usage patterns. Our calculator provides your exact payback period based on your specific situation. Factors like available rebates and home value increases can significantly reduce this timeframe.

    Yes! Texas has relatively low natural gas rates and warm groundwater temperatures, making tankless water heaters highly efficient. They're especially valuable for larger families, homes with high hot water demand, and anyone looking to reduce energy bills. Plus, many Texas utility companies offer rebates of $300–$600 for tankless installations.

    Annual savings typically range from $100–$400 depending on your household size, current water heater type, and energy rates. Our calculator shows your exact savings based on your inputs. Larger families with higher hot water usage see the greatest savings.

    Gas tankless water heaters are typically more cost-effective to operate in Texas due to lower natural gas rates. They also provide higher flow rates, making them better for larger homes. Electric tankless units are easier to install and work well for smaller homes or point-of-use applications. Our calculator compares both options based on your local energy rates.

    Our calculator uses real Texas energy rates, local groundwater temperatures, and industry-standard efficiency ratings (64% for tank, 94% for tankless). Results are based on proven thermodynamic calculations and typical usage patterns. While individual results may vary, our estimates are within 10–15% of actual savings for most households.

    Many Texas utility companies offer rebates ranging from $300–$600 for energy-efficient tankless water heater installations. Austin Energy, CPS Energy (San Antonio), and various electric providers in the DFW area have active rebate programs. Check with your local utility company or visit DSIRE to find available incentives in your area.

    Yes! Real estate studies show that energy-efficient upgrades like tankless water heaters can add $1,500–$3,000 to your home’s resale value. Modern homebuyers actively look for these features, and they’re considered a premium upgrade that can help your home sell faster.

    Tankless water heaters typically last 20+ years with proper maintenance, compared to 10–12 years for traditional tank water heaters. This longer lifespan means you’ll replace a tank water heater twice in the time one tankless unit lasts, providing significant long-term value.

    Local Plumbing Experts

    Our Water Heater Services

    Routine
    Maintenance

    We perform routine maintenance for all types of water heaters. Have an expert evaluate and maintain your water heater.

    Water Heaters

    Expert maintenance, swift repair, and professional installation—Reliant Plumbing ensures your water heater performs optimally for comfort and efficiency.

    Water Heater
    Installations

    Time to replace a leaking or non-performing water heater? We perform same day installations with top-quality products.