Home price appreciation assumptions in a buy vs rent comparison

Why appreciation dominates the result

A home is a large asset bought partly with borrowed money. When a $600,000 home grows by 1% in a year, that is $6,000 of value, but the buyer put down only a fraction of the price. Appreciation therefore acts on the whole home while the buyer's own cash is a smaller slice of it. That is the leverage effect described in leverage in buy vs rent.

Renting has no matching exposure. The renter's wealth depends on what they invest, not on what happens to the house they do not own. So the home price path is the main thing that separates the two households' outcomes once the monthly budgets are matched.

Every number on this page comes from the site's calculator using one fixed illustrative base case: a $600,000 home, 20% down, a 4.5% mortgage rate, a 25-year amortization, $2,300 monthly rent growing 3% a year, a 5.5% nominal return on invested savings, 2% inflation and a 10-year stay in Alberta. These are planning inputs, not market data, and not a forecast.

What different appreciation rates do

The table holds everything else constant and changes only the yearly home price growth. Net worth difference means the buyer's net worth minus the renter's net worth at year 10, after the buyer pays selling costs. Positive means buying finishes ahead.

The real column restates the same gap in today's dollars using the 2% inflation assumption (see real vs nominal dollars).

The break-even appreciation rate

Instead of guessing one number, ask a different question: how much appreciation does the home need before buying and renting finish level? The calculator can solve for it directly, and it depends on how long you stay.

With the base case, the break-even rate is about 3.50% a year for a 5-year stay, about 2.91% for a 10-year stay and about 2.70% for a 15-year stay. The required rate falls as time passes because each year the loan balance shrinks and the early transaction costs are spread over more years.

This is the more honest way to read an appreciation assumption. Rather than asking whether prices will rise 3.5%, ask whether a rate near 2.9% over a decade is a reasonable thing to plan around for the place and type of home you are considering. The break-even calculator lets you solve this for your own numbers.

Choosing a defensible range

Past growth varies widely by city, neighbourhood, property type and period, and it does not promise anything about the future. Rather than relying on one remembered headline figure, build a range with a cautious end, a middle and a hopeful end, and check that your decision survives the cautious end.

A practical way to set the range:

• Start from a long-run anchor such as the Bank of Canada's 2% inflation target, then decide whether the home is likely to track it, lag it or beat it.
• Use a low case at or below inflation, because homes can stagnate for years in real terms.
• Use a middle case that you would be comfortable defending to a sceptical friend.
• Treat anything much above your middle case as upside, not as the plan.
• Run the full range, then look at how much of it lands on each side of break-even.

Appreciation is not constant in real life

A single yearly percentage is a convenient simplification. Real markets move in stretches: flat or falling for a few years, then rising. The calculator accepts a different value for each year, which matters when you want to test a bumpy path, as in buy vs rent in a falling market.

Timing also matters because of selling costs. If you must sell right after a weak patch, the final value is lower and transaction costs still apply. That is why time horizon and appreciation should always be read together.

How appreciation interacts with the other inputs

Appreciation never works alone. It trades off against the mortgage rate, rent growth and the return on the renter's investments. With the base case and a 10-year stay, the break-even appreciation is about 1.67% at a 3% mortgage rate, 2.91% at 4.5%, 4.06% at 6%, 5.14% at 7.5% and 6.14% at 9%. Higher borrowing costs raise the bar that home values have to clear.

In the same way, a higher assumed investment return raises the break-even appreciation. At a 4% return it is about 2.24%, at 5.5% about 2.91% and at 7% about 3.61%. If you are optimistic about investing the difference, you need to be correspondingly optimistic about the home to prefer buying. See investment return assumptions and interest rates and buy vs rent.

What to check before relying on the number

Appreciation is applied to the home's value, but your actual experience also depends on property type, condition, location and how much maintenance you keep up. A condo, a detached house and a new build can behave very differently.

Before leaning on any result, look at the break-even rate for your stay length, test one cautious and one hopeful case, and confirm the other assumptions are consistent with each other. The home appreciation tool runs these tests on your own price and horizon.