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How to Pay for a Tankless Water Heater

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How to Pay for a Tankless Water Heater

Swap your dying water tank for an endless hot shower without taking a huge upfront hit to your savings.

VoAtlas editorial Updated · 3 min read
Typical cost $3,200 before anything else
Across the 0% window $213.33/mo 15 months, no interest

How we got that: $3,200 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.

No more running out of hot water halfway through a shower or waiting an hour for the tank to refill. Swapping to a tankless system takes about a day, and booking the install in late spring or summer keeps costs down before plumbers get slammed with winter emergency calls. Get at least three local quotes so you do not overpay for labor.

A standard setup runs around $3,200. If you put that on the Discover it® Cash Back card, you get a 0% intro APR for 15 months on purchases and balance transfers. That breaks down to $213.33 a month to pay it off before any interest kicks in.

Keep in mind that a 0% intro APR is a strict deadline, not free money. If you still have a balance when those 15 months end, the regular interest rate hits everything that is left. Stick to the monthly setup so you clear the balance completely before the window closes.

The steps

  1. 01

    Get multiple estimates

    Call at least three local plumbers for quotes on labor and equipment. Plumbers usually offer better rates in warmer months when heating emergencies slow down. Make sure each quote includes taking away your old tank.

  2. 02

    Verify your home power

    Tankless units need a lot of power all at once. Check if your electric panel needs an upgrade or if your gas line is wide enough for a gas model. Fixing that beforehand prevents surprise costs on installation day.

  3. 03

    Split up the payments

    Pay the contractor using the Discover it® Cash Back card to secure the 0% intro APR for 15 months on purchases and balance transfers. Set up an automatic payment of $213.33 each month. That clears your $3,200 balance right on time without paying extra in interest.

  4. 04

    Claim local utility rebates

    Energy-efficient upgrades usually come with cash back from local gas or electric companies. Check your utility provider's website for tankless water heater rebates before buying. You can often stack state or federal tax credits on top.

  5. 05

    Time the installation

    Book the work for late spring or early summer. Tradespeople have lighter schedules, making it easier to negotiate installation times and avoid rush fees.

  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 really worth $3,200?

Yes, if your old tank is over ten years old or your family constantly runs out of hot water. They last about 20 years, which is roughly double the life of a standard tank. You also save on monthly energy bills since it only heats water when you turn on the tap.

Can I install a tankless water heater myself?

It is not a DIY job for most people. You are dealing with high-voltage electricity or main gas lines, plus local building permits. Paying a licensed plumber ensures your home stays safe and keeps your manufacturer warranty valid.

How long does it take to switch from a tank to tankless?

A standard replacement usually takes anywhere from 4 to 8 hours. If the plumber needs to run new gas lines or upgrade your electrical panel, it might spill into a second day.

What size tankless water heater do I need?

Sizing depends on how many showers, sinks, or appliances you run at the same time and how cold your groundwater gets in winter. A professional plumber will calculate the required gallons per minute so your hot water never lags.