Key takeaways
Typical rental cost
Roughly $25 to $45 per month in Ontario, or $300 to $540 a year.
Typical purchase cost
$1,800 to $3,200 installed for a 40 to 50 gallon gas tank in Ottawa; $3,500 to $6,500 for tankless.
Break-even
In the middle of those ranges, buying pays for itself in about six years.
Tank lifespan
8 to 12 years, so most owners keep a purchased tank well past break-even.
Renting still makes sense
If you are moving soon, cannot pay up front, or want repairs and replacement handled for a fixed monthly fee.
Read the contract
Rate increases, buyout schedules and removal fees change the maths more than the starting monthly price.
All prices are typical Ottawa ranges in CAD before rebates, not quotes. Your final price depends on the home, the equipment, and the venting and gas piping. Oria gives free estimates on new installations.
Why so many Ontario homes rent their water heater
Renting a hot water tank has been common in Ontario for decades. Many homes came with a rental tank already installed, and the fee shows up quietly on a monthly bill, so plenty of homeowners have never compared it with buying.
A rental is not a bad product. You pay a predictable monthly fee, and the rental provider is usually responsible for repairs and replacing the tank when it fails. The question is simply whether that convenience is worth the extra cost for your situation.
Oria offers both water heater rentals and purchased installations, so this guide lays out the numbers both ways.
The maths: total rental cost over time
Here is what a rental costs over common time frames. The flat columns assume the monthly rate never changes. The right-hand column shows the same rental with a 3% increase each year, a simple example of what an annual rate increase can do.
| Monthly rental | 6 years (flat) | 10 years (flat) | 12 years (flat) | 15 years (flat) | 12 years (+3%/yr) |
|---|---|---|---|---|---|
| $25/month | $1,800 | $3,000 | $3,600 | $4,500 | about $4,260 |
| $35/month | $2,520 | $4,200 | $5,040 | $6,300 | about $5,960 |
| $45/month | $3,240 | $5,400 | $6,480 | $8,100 | about $7,660 |
Compare that with buying a gas tank outright for $1,800 to $3,200 installed. Over a typical 12 year tank life, a mid-range $35/month rental totals about $5,040 with no increases, roughly double the cost of a mid-range $2,500 purchase.
Break-even: how long until buying pays off?
The break-even point is the purchase price divided by the monthly rental fee. After that month, every month you own the tank is money you would otherwise have paid in rent.
| Purchase price (installed) | vs $25/month rental | vs $35/month rental | vs $45/month rental |
|---|---|---|---|
| $1,800 | 6.0 years | 4.3 years | 3.3 years |
| $2,500 | 8.3 years | 6.0 years | 4.6 years |
| $3,200 | 10.7 years | 7.6 years | 5.9 years |
In most combinations, buying pays off well before the end of an 8 to 12 year tank life. The one weak case is an expensive installation compared with a very cheap rental, where break-even can stretch past 10 years.
Annual rental increases shorten every break-even time in this table. Financing a purchase lengthens it, because interest adds to the real cost of buying.
The costs of owning that renters do not see
An honest comparison has to count what owners pay beyond the purchase price.
Repairs
Thermocouples, igniters, gas valves and relief valves can fail during a tank’s life. As an owner, those are your cost.
Maintenance
Flushing sediment once a year and checking the anode rod every few years extends tank life. You can do the flush yourself or include it in a service visit.
Replacement
When the tank reaches the end of its life, you buy the next one. A renter’s provider typically replaces it under the contract.
Water damage risk
A leaking tank is your problem either way, but owners decide when to replace an aging tank before it fails. A drain pan or leak sensor is cheap insurance in a finished basement.
Even with these costs, ownership usually comes out ahead for anyone staying in the home past the break-even point, because the rental fee builds in the provider’s repair costs plus a profit margin.
Rent vs buy water heater: the long-run view
Looking 24 years ahead, roughly two tank lifetimes, makes the difference clear. An owner buys about two tanks. At today’s mid-range price that is about $5,000 in total, plus occasional repairs.
A renter paying a flat $35 a month for the same 24 years pays about $10,080, and more if the rate rises. The gap is the price of convenience and predictable payments.
For tankless water heaters the gap tends to be wider. A tankless unit costs $3,500 to $6,500 to buy, but it often lasts 15 to 20 years, and tankless rentals usually sit at the higher end of rental pricing. See our tank vs tankless comparison for the full picture.
Rental contract terms to check before you sign or switch
The monthly rate is only part of a rental agreement. These terms matter just as much.
Rate increases
Does the contract allow the monthly fee to rise each year, and by how much?
Minimum term
Is there a set term, and what does it cost to end the contract early?
Buyout schedule
How much does it cost to buy the tank outright, and does that price drop as the tank ages? Ask for the schedule in writing.
Removal and return
If you replace a rental tank, who removes it, how is it returned, and are there removal or return fees?
What is covered
Are parts, labour, emergency calls and replacement all included, or only some of them?
Selling your home
How does the contract transfer to a buyer, and what must you disclose?
Ontario consumer protections worth knowing
Ontario restricts door-to-door selling and leasing of water heaters, furnaces and air conditioners. A business generally cannot sign you to a contract for these products at your door unless you contacted it first and invited it to discuss one. Contracts signed in your home come with a 10-day cooling-off period that starts when you receive a written copy.
Since June 6, 2024, Ontario’s Homeowner Protection Act has banned registering notices of security interest (NOSIs) on title for consumer goods such as water heaters, and existing consumer NOSIs are deemed expired. That does not cancel an existing rental contract, so you still need to follow its terms when you switch.
Who should rent and who should buy
Renting makes sense if you:
- Expect to sell within about five years.
- Cannot cover $1,800 to $3,200 up front and do not want to finance it.
- Want one fixed monthly cost with repairs and replacement handled for you.
Buying makes sense if you:
- Plan to stay six years or longer.
- Want to choose the brand, size and efficiency yourself.
- Are comfortable with a yearly flush and the occasional repair call.
- Are upgrading to tankless, where long lifespan rewards ownership.
If cash flow is the main barrier, Oria offers financing on approved credit, with plans from $49/month, so compare that payment and its total cost against a rental before you decide.
Get both numbers before you decide
The fairest way to decide is to put a real purchase quote next to your real rental terms. Oria Heating and Cooling has served Ottawa since 2005, is TSSA approved, and offers 24/7 service for water heaters.
See our hot water tank installation page for purchase options, or call (613) 866-1869 for a free estimate on a new installation.
Frequently Asked Questions
Is it cheaper to rent or buy a water heater in Ontario?
Buying is usually cheaper if you stay in the home more than about six years. A gas tank costs $1,800 to $3,200 installed in Ottawa, while rentals run roughly $25 to $45 a month. Over a typical 12 year tank life, a $35 monthly rental totals about $5,040 before any rate increases, roughly double a mid-range purchase.
How much does it cost to rent a hot water tank in Ontario?
Water heater rentals in Ontario typically cost roughly $25 to $45 per month, depending on tank size, fuel and venting type, and the provider. That works out to about $300 to $540 a year. Tankless rentals usually sit at the higher end of that range. Many contracts allow the rate to increase over time, so check the terms.
How long does it take for buying a water heater to pay off?
Divide the installed purchase price by your monthly rental fee. A $2,500 tank versus a $35 monthly rental breaks even in about six years. Cheaper tanks or pricier rentals pay off in three to five years, while a $3,200 install versus a $25 rental takes nearly 11 years. Annual rental increases make buying pay off sooner.
Can I buy out my rental water heater?
Most rental contracts include a buyout option, and the buyout price often decreases as the tank ages. Ask your provider for the buyout amount in writing. If the tank is already 8 to 10 years old, it is often better to replace it with a new purchased unit than to pay to buy out a tank near the end of its life.
What happens to my rental water heater if I sell my house?
Rental water heaters usually stay with the house, and the rental contract is typically assumed by the buyer. You should disclose the rental during the sale so it is reflected in the agreement. Since June 2024, Ontario no longer allows notices of security interest to be registered on title for consumer goods like water heaters.
Who fixes a rental water heater when it breaks?
Under most rental agreements, the rental provider is responsible for repairing or replacing the water heater, which is the main benefit of renting. Coverage varies, so check whether parts, labour, emergency visits and full replacement are all included. If you own the tank, you arrange and pay for repairs yourself, but you are free to choose any licensed technician.
Can a salesperson sign me up for a water heater rental at my door?
In Ontario, businesses generally cannot sell or lease water heaters, furnaces or air conditioners at your door unless you contacted them first and invited them to discuss one. Contracts signed in your home have a 10-day cooling-off period starting when you receive a written copy. Contracts resulting from prohibited door-to-door marketing are considered void.
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