Renting vs. Buying a Home: What the Numbers Say (and What They Don't)
Introduction
Few phrases are repeated at family dinners as often as this one: "Renting is throwing money away." The intuition feels obvious. Rent is paid and gone forever; a mortgage payment, by contrast, builds ownership. After twenty or thirty years, the homeowner has a house and the renter has nothing.
That reasoning contains a kernel of truth and a massive omission. Buying a home also involves costs that are paid and gone forever, just like rent—they are simply less visible. Once you add them all up, the decision stops being a foregone conclusion and starts depending on local prices, interest rates, time horizons, and how you actually live. Renting is not always throwing money away, and buying is not automatically a great investment.
The right question is not whether paying rent is throwing money away, but how much of what a homeowner pays is also money that never comes back.
The Unrecoverable Costs of Homeownership
When you buy a home with a mortgage, not every dollar of your monthly payment builds equity. A large share—especially during the first decade—goes straight to interest. On top of that come several other costs you never get back:
- Mortgage interest.
- Property taxes.
- Maintenance and depreciation: Roof repairs, plumbing, painting, appliances, HOA fees—everything a landlord covers when you rent.
- Homeowners and mortgage insurance.
- Buying and selling transaction costs: Closing costs, transfer taxes, legal fees, inspections, and real estate agent commissions.
- Opportunity cost of the down payment: The cash tied up in the home could otherwise be invested and compounding in a diversified portfolio.
That last item is the most frequently ignored—and often the largest of all.
The 5% Rule
Canadian financial advisor Ben Felix popularized a clean rule of thumb for comparing the two options. He estimates the annual unrecoverable costs of owning a home as a percentage of the property's value:
- Roughly 1% for property taxes.
- Roughly 1% for maintenance and long-term upkeep.
- Roughly 3% for the cost of capital: the combination of mortgage interest and the foregone investment return on your down payment equity.
That totals approximately 5% of the home's value per year. Divided by twelve, it gives you a monthly breakeven figure you can compare directly against the monthly rent of an equivalent home.
For example, on a $150,000 home: 5% is $7,500 a year, or $625 a month. If an equivalent apartment rents for less than $625 a month, renting is likely the better deal in purely financial terms. If renting costs more than $625, buying starts to pull ahead.
The exact percentages should be adjusted for your local market—property taxes, mortgage rates, and expected investment returns vary by country. What matters is that the framework forces an apples-to-apples comparison: unrecoverable costs of renting versus unrecoverable costs of owning.
The Catch Almost Nobody Follows Through On
The math above rests on one critical assumption: that the renter actually invests the difference. That means investing the cash that wasn't spent on a down payment, plus any monthly savings between rent and the full cost of ownership, consistently over decades.
In practice, many renters don't do that; they spend the difference. And that is where buying has a genuine behavioral edge: a mortgage acts as forced savings. Someone who knows they wouldn't invest diligently on their own may end up wealthier by buying simply because the bank forces them to build equity every month.
Is Your Primary Residence an Asset?
Robert Kiyosaki popularized the argument that the house you live in is not an asset because it takes money out of your pocket every month instead of putting money in. Strictly speaking, that definition is debatable—a paid-off home holds real value and saves you from paying rent, an implicit return economists call imputed rent. Still, Kiyosaki's point highlights something useful: the home you live in does not generate cash flow and is as much a lifestyle consumption choice as an investment. It gives you a roof over your head, not money to buy groceries.
Flexibility Has Financial Value Too
Renting lets you move quickly and cheaply: relocating to a new city for a better job, downsizing or upsizing as life changes, or leaving a neighborhood that no longer fits. For someone early in their career whose life is still in motion, that agility can be worth far more than modest home price appreciation. Selling a house after just two or three years involves transaction costs that can easily wipe out any equity gained.
When Buying Usually Makes Sense
- When you plan to stay in the same city—and ideally the same home—for at least seven to ten years.
- When the mortgage payment plus taxes, insurance, and HOA fees stays below roughly 30% of your net household income.
- When you still have a fully funded emergency fund intact after paying the down payment and closing costs.
- When the 5% rule—adjusted for your local rates—comes out in favor of buying or close to even.
- When you deeply value stability and the freedom to customize your living space.
Common Mistakes
Comparing rent solely against the monthly mortgage payment. The real comparison is rent versus all unrecoverable ownership costs combined.
Stretching your budget to the absolute maximum the bank approves. The bank's approval measures how much debt you can service without defaulting, not how comfortably your family will sleep at night.
Draining every last dollar of savings for the down payment. Moving into a house with zero cash reserves turns the first broken water heater into high-interest debt.
Assuming home prices always beat inflation by a wide margin. Over long historical stretches, real (inflation-adjusted) home prices in many markets have grown modestly; much of housing's return comes from the rent you avoid paying.
Buying out of social pressure. A twenty-five-year financial commitment is too big to make just to satisfy relatives at dinner.
Conclusion
Renting is not throwing money away, and buying is not automatically building wealth. Both choices involve costs that never return; which one wins depends on local price-to-rent ratios, how long you stay put, and whether you have the discipline to invest the difference. If you are weighing this decision right now, run the math with your own numbers: multiply the price of the home you are looking at by 5% (or the percentage adjusted for your country), divide by twelve, and compare that figure with the monthly rent of a comparable place in the same neighborhood.
References
- Felix, B. (2018). Renting vs. Buying a Home: The 5% Rule [video]. Common Sense Investing, YouTube.
- Jordà, Ò., Knoll, K., Kuvshinov, D., Schularick, M., & Taylor, A. M. (2019). The rate of return on everything, 1870-2015. The Quarterly Journal of Economics, 134(3), 1225-1298.
- Shiller, R. J. (2015). Irrational Exuberance (3rd ed.). Princeton University Press.
- Kiyosaki, R. T. (1997). Rich Dad Poor Dad. Warner Books.