Common buy vs rent mistakes

Mistake 1: Comparing the mortgage payment to rent

The mortgage payment is the most visible cost of owning, so it is tempting to set it beside rent and call it a day. But a mortgage payment excludes property tax, home insurance, maintenance and the utilities an owner often pays that a tenant does not.

Take a $600,000 home with 20% down at 4.5% over a 25-year amortization. The calculator puts the mortgage payment at $2,657 a month, which looks close to a $2,300 rent. Add property tax of $325, insurance of $125, maintenance of $500 and extra utilities of $150, and the owner's first-month cost is $3,757. The renter's is $2,325 including tenant insurance. The real monthly gap is $1,432, not $357. These are illustrative inputs, not market data.

Mistake 2: Treating the down payment as free money

A down payment feels like saving, so it is easy to leave out of the comparison. But the cash could have been invested. In the example, the buyer spends $126,380 up front on the down payment, closing costs and moving. Invested at 5.5% for ten years, that sum would grow to about $215,875.

A fair comparison gives the renter that money to invest. Leaving it out flatters ownership. The reverse mistake also happens: assuming the renter will invest the difference without ever dipping into it, which is generous to renting. See rent and invest the difference for the discipline question.

Mistake 3: Ignoring the cost of getting out

Buying costs money on entry, and selling costs money on exit. In the ten-year example, selling costs total about $38,047, of which roughly $35,547 is realtor commission and GST on it at the assumed 4% rate. With no commission at all, the ten-year result would be about +$77,233 rather than +$41,686.

These costs are why short stays tilt toward renting. At three years in the same example, renting is ahead by $19,514. Read the guide on selling costs before assuming you will break even quickly.

Mistake 4: Betting on a single price forecast

Almost every buy vs rent result hinges on the assumed rate of home-price growth, and nobody knows it in advance. In the ten-year example, buying leads by $157,292 at 5% a year, by $41,686 at 3.5% and trails by $59,300 at 2%. The break-even sits at about 2.91%.

Instead of choosing one forecast, test a range and find your break-even. The home appreciation tool makes that straightforward. If your decision only works at the high end of the range, treat it as fragile.

Mistake 5: Underestimating upkeep and surprise costs

Maintenance is easy to wave away at 1% of value a year, and tempting to forget entirely. But homes and condo buildings generate big, lumpy bills, and special assessments can arrive with little warning. In the example, raising maintenance from 1% to 1.5% of value turns +$41,686 into −$4,060, and 2% gives −$49,807.

A special-assessment allowance has a similar effect: $3,000 a year takes the result to −$1,288, and $6,000 a year to −$44,262. Budget for upkeep honestly, and check a condo corporation's reserve fund and history. The guides on maintenance and repairs and condo fees and special assessments go deeper.

Mistake 6: Assuming rent and mortgage rates stand still

Rent usually rises over time, while a fixed-rate mortgage payment stays flat for the term. If you assume rent never changes, you understate the cost of renting: at 0% rent growth the ten-year result in the example is −$6,229, while at 3% it is +$41,686 and at 5% it is +$77,919.

The mortgage side has its own trap. A five-year fixed rate is not a ten-year guarantee. If the same loan renews at 6.5% rather than 4.5%, the ten-year result falls to −$2,113, and at 7.5% to −$24,334. Look at the guide on mortgage renewal risk and keep room in your budget.

Mistake 7: Importing rules that do not apply in Canada

Many articles and calculators assume US rules. In Canada, mortgage interest and property tax on your principal residence are not tax-deductible, so you should not subtract a tax saving from the owner's costs. On the other side, the gain on the sale of a home that qualifies as your principal residence is generally tax-free, though the sale must be reported on your return and the designation rules should be confirmed.

Renters are not shut out of tax-advantaged saving either. TFSA, RRSP and FHSA room is available whether you own or rent. See principal residence exemption and taxes for what to check.

How to avoid all seven

Write down every cost on both sides, give the renter the same cash to invest, include selling costs, vary the assumptions that matter, and check the results against your own horizon. The checklist puts those steps in order, and the main calculator does the arithmetic.