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How to Pay for a Tankless Water Heater Upgrade

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How to Pay for a Tankless Water Heater Upgrade

Swap your old water heater before winter hits without draining your savings all at once.

VoAtlas editorial Updated · 3 min read
Typical cost $2,600 before anything else
Across the 0% window $173.33/mo 15 months, no interest

How we got that: $2,600 spread evenly across the 15-month introductory window on the Discover it® Cash Back. Checked · at the bank Carry a balance past the window and the standard APR applies to what is left.

Cold showers are miserable, but waiting until your old tank bursts in December is worse. Upgrading to a tankless system means endless hot water on demand and a much smaller footprint in your utility room. The installation usually takes one day, and booking a plumber in the late summer or early autumn is your best bet for better rates before the winter rush hits. Always get at least three quotes from local plumbers to keep them honest on labor costs.

A solid install runs about $2600. Instead of wiping out your emergency fund, we can split that bill into manageable monthly chunks. Using a card with a solid introductory rate lets you pay the project off over time without throwing money away on interest.

Remember, this intro window is a strict deadline, not free money. If you still have a balance left when the 15 months end, the regular interest rate kicks in on whatever is left. Keep your monthly payments on track to hit zero before the clock runs out.

The steps

  1. 01

    Gather your quotes

    Do not hire the first plumber who shows up. Call three licensed pros and ask for detailed, itemized estimates for a $2600 upgrade. Make sure they include the cost of removing your old tank and upgrading any gas or electrical lines.

  2. 02

    Pick the right season

    Plumbers get slammed when winter freezes hit and old tanks fail. Book your job during their slower shoulder seasons in late summer or early fall. You will have more leverage to negotiate on labor and get on their schedule quickly.

  3. 03

    Use the Discover it® Cash Back

    This card offers a 0% intro APR for 15 months on purchases and balance transfers. That means you can put the $2600 plumbing bill on the card and pay it off slowly without any interest piling up during those first 15 months. Just make sure you pay on time every month to keep the promotional rate active.

  4. 04

    Set up your monthly math

    Divide the $2600 total by your 15-month window. That comes out to exactly $173.33 per month. Set up automatic payments for this amount from your checking account so you do not even have to think about it.

  5. 05

    Clear the workspace

    Plumbers charge by the hour, so do not make them waste time moving your clutter. Clear a wide path to your old water heater before they arrive. The faster they can get in, swap the units, and get out, the lower your final bill will be.

  6. 06

    Check the card terms before you commit

    Every figure we publish for the Discover it® Cash Back carries the date a person verified it against Discover and a link to where they checked. Intro windows and APRs change without notice, so confirm the current terms before applying.

    See Discover it® Cash Back terms →

Common questions

Is a tankless water heater actually worth the extra cost?

Yes, if you plan to stay in your home for a few years. They use less energy because they only heat water when you turn on the tap, which lowers your monthly utility bills. Plus, you will never run out of hot water mid-shower.

How long do tankless water heaters last?

They usually last about 20 years, which is roughly double the lifespan of a traditional tank. Regular maintenance, like flushing the system once a year to remove mineral buildup, will keep it running smoothly.

Can I install a tankless water heater myself to save money?

We do not recommend it. Installing one requires working with gas lines, venting systems, and high-voltage electricity, which can be dangerous. Hiring a licensed plumber ensures the job is up to code and keeps your warranty valid.

Do I need to upgrade my gas line for a tankless heater?

Sometimes. Tankless heaters require a large burst of energy when they kick on, which might require a larger gas line than your old tank. A professional plumber will check your existing lines during the quoting process to let you know for sure.