Almost every parent has said some version of it: "Stop paying someone else's mortgage. Buy something. It's an investment." The sentiment is understandable, and the math behind it is often wrong.
Buying a home can be one of the best financial moves of your life. It can also be one of the worst. Which one depends on numbers most people never actually run.
The myth: rent = wasted money
The assumption is that a $1,200 rent cheque disappears while a $1,200 mortgage payment "builds equity." That's only partly true. In the first years of a typical 25-30 year mortgage, the majority of your payment is interest, not principal, and interest is exactly as gone as rent is.
On a $300,000 mortgage at 4% over 30 years, the total interest paid across the life of the loan is roughly $215,000. That's money you don't get back either. In the first five years, more than half of every monthly payment goes to the bank, not to you.
The real cost of owning
The monthly mortgage payment is not the cost of ownership. It's a fraction of it. Add:
- Property tax, varies by country and municipality; assume 0.5-1.5% of home value per year.
- Maintenance, the widely-cited rule is 1-2% of home value annually. On a $300k home that's $3,000: $6,000/year, or $250. $500/month averaged. Boilers, roofs, plumbing don't ask permission.
- Home insurance, usually $300: $700/year.
- Transaction costs, buying and selling a home costs 6-10% of the price in taxes, notary fees, agent fees. Move within 5 years and you often lose money on the round-trip.
- Opportunity cost of the down payment. $60,000 sitting in home equity could have been earning market returns instead.
A concrete comparison
Take a $300,000 apartment vs renting the equivalent for $1,200/month.
Buy scenario: $60,000 down (20%), $240,000 mortgage at 4% over 30 years. Monthly payment ≈ $1,145. Property tax ≈ $200/month. Maintenance ≈ $300/month. Insurance ≈ $50/month. All-in monthly cost ≈ $1,695, before any repair surprises.
Rent scenario: $1,200 rent. $60,000 down payment invested at 6% a year return. The $495/month difference between owning and renting also invested. After 10 years, that portfolio is worth roughly $190,000.
Buy scenario after 10 years: home equity of roughly $111,000 ($60k down + about $51,000 of principal paid down). If the home also appreciated 2%/year, add another $66,000. Total: ≈ $177,000.
The comparison is closer than most people expect. Small changes to the assumptions, higher rent inflation, faster appreciation, worse maintenance surprises, flip the winner either way.
The break-even question
There is a real crossover point where buying beats renting. It is almost never inside 3 years. It is usually somewhere between 5 and 10 years, depending on your local market. If you're not confident you'll stay put for that long, the transaction costs alone can wipe out any equity gain.
The New York Times has run a rent-vs-buy calculator for over a decade; the honest answer it produces is almost always: "it depends on how long you stay."
What buying actually gives you
The financial case for buying is real but narrower than folklore suggests:
- Forced savings. Most people don't invest the difference between rent and mortgage. Owning enforces it.
- Inflation hedge. Your mortgage payment is fixed in nominal terms; rent rises with inflation.
- Leveraged appreciation. You put 20% down but capture 100% of the price change (good and bad).
- Optionality on housing. No landlord can end your lease.
What renting actually gives you
- Liquidity. A rented life can move for a job in 30 days. An owned life can't.
- Predictable costs. The boiler is not your problem.
- Investable capital. $60,000 not locked in a down payment can compound elsewhere.
- No transaction-cost trap. No 8% haircut every time your life circumstances change.
The honest recommendation
Buy when three things line up: you plan to stay ≥ 7 years, you can afford the full 4-5% annual carrying cost (not just the mortgage), and you have a separate emergency fund that survives your down payment. If any one is missing, renting is not a failure; it is the correct decision.
The wealth-building question is not "do I own a home?" It is "am I saving and investing a meaningful percentage of my income?" You can do that in either housing setup. You can fail at it in either housing setup.