Mortgage vs Renting Calculator: Which Is Cheaper Long Term?

Comparing "my rent" to "a mortgage payment" is the wrong comparison; it leaves out property taxes, maintenance, insurance, closing costs, and the opportunity cost of the down payment sitting in a house instead of invested elsewhere. Run the full numbers and the answer flips more often than people expect, especially over shorter time horizons.

What a Mortgage Payment Actually Hides

On a $400,000 home with a 20% down payment ($80,000) and a $320,000 loan at 6.5% over 30 years, the principal and interest payment alone is about $2,022 a month. Add property taxes (often 1-1.5% of home value annually, so roughly $333-500 a month), homeowners insurance (commonly $100-150 a month), and PMI if you put down less than 20%, and the real monthly outlay is closer to $2,500-2,700, not the $2,022 number most people quote when comparing to rent.

The Maintenance Cost Nobody Budgets For

A commonly cited rule of thumb is that home maintenance costs run 1-2% of the home's value per year. On a $400,000 home, that is $4,000-8,000 annually, or roughly $333-667 a month, covering things like roof repairs, HVAC servicing, appliance replacement, and general upkeep that a renter simply never pays for directly since it falls on the landlord. Skipping this line item is the single most common way people underestimate the true cost of owning.

The Opportunity Cost of a Down Payment

That $80,000 down payment, plus typical closing costs of 2-5% of the loan amount (say $10,000), is money that is no longer available to invest elsewhere. If invested in a diversified portfolio averaging 7% annual returns instead, $90,000 would grow to roughly $354,000 over 20 years just sitting untouched. This does not mean buying is a bad idea, since home equity also builds and property can appreciate, but it means a fair comparison has to account for what that capital could have earned in an alternative investment, not just compare it to zero.

Building Equity vs Paying Rent

Every mortgage payment splits into principal (which builds your equity) and interest (which does not). Early in a 30-year loan, this split is heavily weighted toward interest: on that $320,000 loan at 6.5%, the very first payment includes about $1,733 of interest and only $289 of actual equity-building principal. It typically takes 10-15 years on a standard 30-year mortgage before the principal portion of the payment exceeds the interest portion, meaning the "you're building equity instead of paying a landlord" argument is much weaker in the early years than people assume.

A Simplified Side-by-Side Example

In this example, renting costs less per month and requires far less upfront cash, but builds no equity, while buying costs more monthly and requires substantial upfront capital in exchange for equity growth and eventual ownership. Which one wins financially depends heavily on how long you stay in the home, since upfront closing costs and realtor fees on a future sale (often 6-10% combined) need years of appreciation and equity buildup to offset.

The Break-Even Timeline Matters Most

A common finding when running these numbers is that buying only becomes cheaper than renting after somewhere between 5 and 8 years in the same home, once you account for closing costs, selling costs, and the slow shift from interest-heavy to principal-heavy payments. Moving every 2-3 years for a job, for example, often makes renting the financially better choice even if buying looks attractive on a simple monthly payment comparison, purely because transaction costs eat up any equity gained in such a short window.

Run Your Own Comparison

Our free mortgage calculator lets you model the full monthly cost of a home purchase, including taxes and insurance, so you can compare it honestly against rent for your specific numbers rather than relying on a rule of thumb that may not fit your market.