Is It Cheaper to Rent or Buy a House? The Real Math

Is it cheaper to rent or buy a house? It sounds like a simple math problem — but comparing a monthly rent payment to a mortgage payment misses most of what makes the decision complicated. The real answer depends on how long you stay, what the local market looks like, and costs most calculators don't even show you. This guide walks through the full picture so you can run the numbers on your own situation.

Why comparing rent to mortgage payment is the wrong starting point

The most common mistake people make is lining up a monthly rent against a monthly mortgage payment and calling it a day. That comparison leaves out most of the actual cost of owning. A more complete monthly picture for a homeowner includes:

• Principal and interest on the mortgage (the number everyone focuses on)
• Property taxes — typically 0.5% to 2% of home value per year, paid monthly into escrow
• Homeowner's insurance — roughly 0.5% to 1% of value annually
• Private mortgage insurance (PMI) — required if your down payment is under 20%, adding roughly 0.5% to 1% of the loan annually until you reach 20% equity
• Maintenance and repairs — the rule of thumb is 1% to 2% of home value per year for upkeep; older homes and harsh climates push this higher
• HOA fees — anywhere from $0 to $1,000+ per month in condo and planned communities

On a $400,000 home, those non-mortgage costs alone can easily run $1,000 to $1,500 per month. Miss them, and you're comparing apples to a basket of fruit.

The true cost calculation: a worked example

Let's say you're deciding between renting a house for $2,200 per month or buying a comparable home for $420,000 with a 10% down payment ($42,000) at 6.75% for 30 years.

Monthly cost of buying

• Mortgage payment (P&I): ~$2,446
• Property taxes (1.1% annual): ~$385
• Homeowner's insurance (0.5%): ~$175
• PMI (0.7% on $378,000 loan): ~$221
• Maintenance reserve (1.25%): ~$438
• Total monthly cost of owning: ~$3,665

Monthly cost of renting

• Rent: $2,200
• Renter's insurance: ~$20
• Total monthly cost of renting: ~$2,220

The gap is $1,445 per month — over $17,000 per year. That's real money, and for the first several years of homeownership it's not offset by equity gains alone. But this comparison still isn't complete, because it ignores what the renter does with that $1,445 difference and what happens to home values over time.

The opportunity cost of the down payment

The buyer in the example above put $42,000 down. A renter who keeps that $42,000 invested in a diversified index fund earning 7% annually would accumulate meaningful returns over a decade. Add the $1,445 monthly difference invested consistently, and the renter's financial picture can look surprisingly competitive — at least in the short run.

This is what economists call the opportunity cost of homeownership: the returns you give up on capital that's now tied up in a house. It's one reason why renting and investing the difference beats buying in some scenarios, especially at high mortgage rates and in expensive markets where the rent-to-price ratio is unfavorable.

When buying wins: equity, stability, and appreciation

The rent-and-invest scenario looks best in the early years. Homeownership's financial advantages accumulate over time through three mechanisms:

• Equity build-up. Each mortgage payment transfers a growing share of the home's value to you. In the early years this is mostly interest, but after a decade a meaningful portion of every payment is principal.
• Appreciation. U.S. home prices have historically risen around 3%–4% per year on average over long periods, though the variance between markets is enormous. In a rising market, the appreciation on a $420,000 home compounds to significant wealth over 15–20 years.
• Rent inflation hedge. Your mortgage principal and interest payment is fixed for 30 years. Rents tend to rise with inflation — sometimes faster. A homeowner locked in at today's rate is insulated from this; a renter isn't.

These factors reverse the math over the long term. A homeowner who stays in a home for 10–15 years typically comes out well ahead, especially after their mortgage is paid down significantly and the property has appreciated.

The break-even timeline: how long before buying pays off

The break-even point is the year at which total homeownership costs (including opportunity costs) equal total rental costs, after accounting for equity. In most analyses this falls somewhere between 4 and 8 years. Key variables that move it:

• Local rent-to-price ratio. In cities where home prices are 20–30× annual rent, break-even takes longer. In markets where prices are 12–15× annual rent, buying pencils out faster.
• Mortgage rate. Higher rates push more monthly payment to interest (not equity) and widen the gap versus renting, pushing break-even later.
• Home price appreciation rate. Faster appreciation shortens break-even; flat or falling prices can eliminate the financial case for buying entirely.
• Transaction costs. Buying typically costs 2%–4% of the price in closing costs; selling typically costs 5%–6% in agent commissions and fees. A home you buy and sell in two years will almost certainly lose money purely from transaction friction.

If there's one rule of thumb: if you're not planning to stay at least 5 years, the financial math almost never favors buying. The transaction costs alone need time to amortize.

How the rent vs buy calculator models the full comparison

Running this by hand is tedious — there are a dozen variables and you want to see how changing the appreciation rate or investment return changes the answer. The rent vs buy calculator compares the two paths over your chosen time horizon, accounting for mortgage amortization, home appreciation, rent growth, opportunity cost on the down payment, and transaction costs on both sides. It tells you the break-even year and the total wealth gap at any point in time.

To estimate your monthly mortgage payment before you even plug in your rent, use the mortgage calculator — it shows the full principal-and-interest payment at any price, rate, and term, and lets you add an estimated property tax rate to get a closer-to-real monthly number.

Non-financial factors that belong in the decision

The financial comparison is important, but it doesn't capture everything:

• Stability. Homeownership provides certainty that a landlord can't terminate your lease, raise rent dramatically at renewal, or sell the property out from under you. This has real value, especially for families with school-age children.
• Flexibility. Renting lets you relocate quickly for career opportunities, care for family, or lifestyle changes without the friction of selling. If your industry, relationship status, or city preferences are in flux, renting buys you time.
• Customization. Owners can renovate, repaint, get pets, and landscape. These freedoms matter significantly to how much you enjoy your home — a factor that doesn't appear in any spreadsheet.
• Credit and financial readiness. Lenders typically want a credit score above 620 (660+ for better rates), a debt-to-income ratio under 43%, and enough cash for a down payment plus closing costs plus reserves. If you're close but not there, renting while building your financial profile can mean materially better terms when you do buy.

The honest answer

Whether it's cheaper to rent or buy depends on your local market, how long you'll stay, what you do with money not tied up in a home, and how much you value stability versus flexibility. In most U.S. cities today, the monthly cost of owning a home exceeds the monthly cost of renting a comparable one. But over a 10- to 15-year horizon in a market with reasonable appreciation, ownership usually builds more net worth — provided you can stomach the illiquidity and the upkeep.

The best decision is the one made with complete numbers, not just the mortgage payment. Before you decide, read our guide on how much house you can actually afford — it covers the income rules lenders use and why the bank's number is often higher than the number that makes sense for your life.