Mortgage vs. Rent: How to Run the Numbers for Your Situation

"Renting is throwing money away" is one of the most repeated pieces of personal-finance folk wisdom — and one of the most misleading. The honest answer to whether buying or renting is better is "it depends," and what it depends on isn't ideology but a handful of numbers specific to your situation. This guide walks through every input that matters, shows how to combine them into a real comparison, and explains what most people miss when they run this math themselves.

The real costs of owning a home

When most people compare rent to a mortgage payment, they compare the wrong numbers. A monthly mortgage payment is the smallest cost of homeownership, not the total. The full cost of owning includes:

Principal and interest — your monthly mortgage payment, the part most people quote.

Property taxes — typically 0.5% to 2.5% of the home’s value annually, varying enormously by state and locality. New Jersey averages around 2.2%, Hawaii around 0.3%. On a $400,000 home, this is $1,000-9,000 per year extra on top of the mortgage.

Homeowner’s insurance — typically 0.3% to 1.0% of home value annually, varying by region (storm-prone areas pay much more). Plan on $1,200-4,000 annually for an average home.

Mortgage insurance (PMI) — required if you put less than 20% down, typically 0.5% to 1.5% of the loan annually. Removable once you reach 20% equity, but a real cost in early years.

HOA or condo fees — common in newer subdivisions and most condos, ranging from $100 to $1,000+ per month.

Maintenance and repairs — the rule of thumb is 1% of home value per year. On a $400,000 home, that’s $4,000 annually averaged over time. Some years it’s nothing; others (new roof, HVAC replacement, plumbing rebuild) it’s $20,000+. Skipping maintenance just defers the bill.

Utilities you didn’t pay before — depending on your rental, you may now be on the hook for water, sewer, trash, gas, and lawn care. These can add $100-300 per month.

Closing costs to buy — typically 2-5% of purchase price, paid upfront. On a $400,000 home, that’s $8,000-20,000 you’re handing over before you move in.

Closing costs to sell — when you eventually sell, expect to pay 6-8% of sale price in agent commissions and fees. On a $400,000 sale, that’s $24,000-32,000.

The monthly cost of ownership for a $400,000 home with 20% down at 7% mortgage rate is roughly:

The mortgage is $2,129; the actual cost is closer to $3,200. A common error is comparing the $2,129 mortgage to a $2,400 rent and concluding owning is cheaper. The honest comparison is $3,200 to $2,400, which tells a different story.

What renting actually costs (it’s less than you might think)

Renting also has hidden costs, but fewer of them.

Rent — the headline number, paid monthly.

Renter’s insurance — typically $15-30 per month for $30,000-50,000 of personal property coverage. Cheap and worth it, but rarely required.

Application and security deposits — paid once at move-in, refundable in part. Counts as locked-up cash but not a permanent cost.

Annual rent increases — typical leases allow rent to increase 3-8% per year. This is the biggest hidden cost of long-term renting and the strongest argument against it.

That’s it. There’s no maintenance budget, no property tax line item, no $20,000 surprise when the water heater fails. The simplicity of renting is a real benefit and shows up in cash flow predictability.

The equity question

Here’s where the comparison gets subtle. With a mortgage, part of your payment builds equity (the portion you’d get back if you sold). With rent, none of it builds equity. This is the seed of the “rent is throwing money away” idea — and it’s not entirely wrong, but it’s incomplete.

In the first years of a 30-year mortgage, very little of your payment builds equity. With our $400,000 example at 7%, the first month’s $2,129 payment splits as:

• Interest: $1,867 (this goes to the bank, not equity)
• Principal: $262 (this builds equity)

In month one, you build $262 of equity for a $3,162 monthly cost — meaning $2,900 is genuinely “thrown away” in the same sense people accuse rent of being. Over the first 5 years of the loan, you’d build about $25,000 of equity from $190,000 paid in. The rest is interest, taxes, insurance, and maintenance.

Equity does accelerate over time. By year 15, principal payments exceed interest payments. By year 30, you own the house outright. But the early years of homeownership are genuinely expensive, and the equity build-up is much slower than naive intuition suggests.

The home appreciation question

The other major financial benefit of owning is that the home’s value typically grows over time. Historical U.S. residential real estate appreciation averages around 3-4% per year — slightly above inflation but well below stock market returns (10% historical average for the S&P 500).

Two important caveats:

Appreciation varies wildly by location. Coastal California and major-metro areas have seen 6-10% annual appreciation in some decades. Rust Belt and rural markets have seen flat or even declining values. Don’t assume national averages apply to your specific location.

Appreciation isn’t free. You can’t spend your home’s appreciation while you live in it. Realizing it requires either selling (with 6-8% friction costs) or borrowing against it (with interest costs). It’s wealth, but it’s illiquid wealth.

The opportunity cost of the down payment

This is the input most rent-vs-buy comparisons forget. When you put $80,000 down on a $400,000 house, that $80,000 stops earning investment returns. If the stock market returns 7% per year (after inflation, conservatively), that $80,000 would have grown to about $158,000 over 10 years invested elsewhere.

That $78,000 of foregone investment growth is a real cost of homeownership that doesn’t appear on any closing statement. The honest rent-vs-buy comparison treats it as a line item.

For renters who actually do invest the difference (rather than spending it), the opportunity cost flips: the renter ends up with a substantial investment portfolio after the same number of years. For renters who don’t invest, the opportunity cost is moot — they’d never have built that wealth anyway.

This is why the most accurate rent-vs-buy framing isn’t “renter spent $X, owner spent $Y.” It’s “after 10 years, the renter who invested aggressively has $A in wealth; the owner has $B in equity plus appreciation.” Sometimes A > B and sometimes B > A, depending heavily on your inputs.

The break-even calculation

The classic question — “how long do I need to stay before buying beats renting?” — has a real answer based on the numbers. The break-even period is typically 5-7 years for most U.S. markets, but it can range from 3 years (high-appreciation markets, low rent) to 15+ years (low-appreciation markets, fast-rising rent isn’t fast enough).

The intuition: the closing costs to buy and sell (~10% of price combined) are large. To recoup them via equity buildup and appreciation, you need enough years for those gains to exceed the friction. A 2-year ownership in most markets loses money even with appreciation, because the closing costs alone exceed any gains.

Three rules of thumb:

• Under 3 years: Rent, almost regardless of market. The friction costs of buying and selling consume any benefit.
• 3-7 years: It depends. Run the numbers carefully. Appreciation rate, rent growth, and tax situation matter a lot.
• 7+ years: Buying tends to win if rents are rising at typical rates and you can afford the maintenance.

Tax considerations

Two tax effects shape the comparison:

Mortgage interest deduction. Federal tax law lets homeowners deduct mortgage interest on up to $750,000 of mortgage debt (current as of 2026). For most middle-class buyers, this is worth $0-5,000 per year in tax savings, depending on whether they itemize.

The standard deduction is now high enough ($14,600 single, $29,200 married for 2026) that many homeowners don’t actually itemize, meaning the mortgage interest deduction provides no benefit at all for them. Don’t assume you’ll get this benefit; verify against your actual tax return.

Property tax deduction. Property taxes are also deductible (capped at $10,000 combined with state income taxes under SALT cap). Same caveat about itemizing applies.

Capital gains exclusion on sale. Up to $250,000 ($500,000 married) of profit on selling a primary home is tax-free, provided you’ve lived there 2 of the last 5 years. This is one of the largest tax breaks in the U.S. tax code and meaningfully favors long-term ownership.

The non-financial factors

The math isn’t everything. Several factors don’t appear in any spreadsheet:

Stability. Renters can be displaced when leases end, owners’ rentals are sold, or rents rise beyond reach. Owners control their own timeline (subject to making payments).

Customization. Renters can’t usually paint, renovate, or significantly modify. Owners can.

Flexibility. Renters can leave with 30-60 days’ notice for a job change. Owners take 60-90 days plus closing costs to extricate.

Community. This cuts both ways. Owners are typically more invested in neighborhoods (literally and figuratively). Renters can adjust faster to lifestyle changes.

Stress. Maintenance is a real ongoing burden — both financial and mental. Some people find it grounding; others find it exhausting.

When buying makes more sense

Buying tends to win when:

• You’re confident you’ll stay 7+ years
• The rent-to-price ratio in your area is high (rent is expensive relative to home prices)
• Rents are rising fast in your area
• You have strong cash reserves beyond the down payment
• You value the customization and stability of ownership
• Mortgage rates are low or moderate (under ~6%)

When renting makes more sense

Renting tends to win when:

• You’re not certain about staying 5+ years
• The rent-to-price ratio is low (homes are expensive relative to rent)
• Your job or life is in flux
• You have minimal savings beyond what would be the down payment
• You’d actually invest the difference between rent and ownership cost
• Mortgage rates are high (current rates near 7% raise the buy threshold significantly)
• You’d be house-poor (spending >35% of income on housing total)

How to use the Rent vs. Buy Calculator

The calculator above takes the key inputs and produces an honest side-by-side comparison: monthly cost, total cost over your time horizon, equity at end, and break-even point. A few tips for getting an accurate read:

• Don’t lowball the maintenance estimate. 1% of home value per year is a reasonable long-run average. If you enter zero, the calculator will tell you owning is cheaper than it really is.
• Use realistic appreciation, not historical bubble years. 3-4% annual is conservative and probably realistic. Anything above 6% is optimistic outside a few specific markets.
• Use realistic rent growth. 3-5% annual is typical. Don’t assume your rent will be flat — it almost certainly won’t be.
• Account for the opportunity cost of your down payment. If you wouldn’t actually invest the equivalent amount as a renter, set this to zero. If you would, the standard estimate is what your investment portfolio would return (5-7% real).
• Check break-even year. This is the most important output. If the calculator says break-even is year 8 and you’re planning a 4-year stay, the math is telling you to rent.

The wrong question is “is owning better than renting in general?” The right question is “given my income, location, life plans, and risk tolerance, which costs me less over the time horizon I actually plan to be there?” The calculator is designed to answer the second question. The first one, frankly, doesn’t have an answer.