Rent vs Buy: What Costs Should You Compare?

Key takeaways

• Renting's real cost is rent plus renters insurance; owning's real cost is interest, taxes, insurance and maintenance minus equity gained.
• Only the interest portion of a mortgage payment is a pure cost — principal builds equity.
• Selling costs (commonly 6-8% of sale price including commissions and closing costs) matter for short stays.
• The opportunity cost of the down payment is real and grows over time.
• The breakeven horizon shifts with rent growth, appreciation and mortgage rate — it is not a fixed number of years.

Costs of renting

• Monthly rent, escalating at renewal.
• Renters insurance and any parking or amenity fees.
• Security deposit — recoverable, so it mainly represents opportunity cost.

Costs of owning

• Mortgage principal and interest — only the interest portion is a pure cost; principal builds equity.
• Property tax and homeowners insurance.
• Maintenance and repairs — often estimated at roughly 1% of home value per year, though older homes cost more.
• HOA dues where applicable.
• Closing costs on purchase and selling costs on exit, which commonly include agent commission.

Worked example: 3-year stay

Renting: $2,200/month rent for 3 years, plus $180/year renters insurance.

Buying: $400,000 home, 10% down ($40,000), 6.5% 30-year loan, closing costs $10,000, property tax + insurance $650/month, maintenance 1%/year ($4,000/year), assumed 3% annual appreciation.

1. Total rent paid over 3 years: 2,200 x 36 = $79,200, plus insurance ≈ $540, total ≈ $79,740.
2. Total owning cash out over 3 years: mortgage P&I ≈ $2,402 x 36 = $86,472, plus taxes/insurance 650 x 36 = $23,400, plus maintenance 4,000 x 3 = $12,000, plus purchase closing costs $10,000. Subtotal ≈ $131,872, plus the $40,000 down payment tied up.
3. Equity built: roughly $18,500 in principal paid down over 3 years, plus appreciation on the home (400,000 grown at 3%/year ≈ $437,000, a gain of about $37,000).
4. Selling costs at exit (assume 7% of $437,000): ≈ $30,590.
5. Net owning position after 3 years: down payment + cash costs - equity gained - appreciation + selling costs, compared against total rent paid, shows why short stays often favor renting once selling costs are included — the gain from equity and appreciation has not yet offset the transaction costs.

Second example: the same numbers over 8 years

Holding period is often the single largest driver of the rent-versus-buy answer, more than small differences in rate or rent. Extending the exact same scenario out to 8 years changes the outcome because fixed transaction costs are spread over more time and more principal has been repaid.

1. Rent over 8 years, assuming 3% annual rent growth from $2,200: total rent paid ≈ $234,000, plus roughly $1,600 in cumulative renters insurance.
2. Owning cash costs over 8 years: mortgage P&I 2,402 x 96 ≈ $230,592, taxes/insurance growing modestly ≈ $67,000 cumulative, maintenance 8 years at roughly 1%/year on a rising value ≈ $36,000, plus the original $10,000 closing costs.
3. Equity built after 8 years: roughly $58,000 in principal repaid, on a loan that started at $360,000.
4. Appreciation after 8 years at 3%/year: 400,000 x (1.03^8) ≈ $506,900, a gain of about $106,900.
5. Selling costs at exit (7% of $506,900): ≈ $35,483.
6. Netting owning's cash costs against equity and appreciation gained, then comparing to 8 years of rent paid, is why longer holding periods commonly tip the comparison toward owning in a stable or appreciating market — the fixed costs of buying and selling matter much less when spread across 8 years instead of 3.

How the breakeven horizon shifts

Equity, appreciation and opportunity cost

Owning converts part of each payment into equity, and appreciation increases that equity further. Against this, the cash used for the down payment and closing costs is no longer invested elsewhere — that foregone return is the opportunity cost, and over long horizons it can be substantial.

Time horizon usually decides the answer. Transaction costs on both ends mean short stays generally favor renting; longer stays generally favor buying, all else equal, because fixed transaction costs are spread over more years and more of the payment goes to principal.

Common mistakes

• Comparing rent directly to a full mortgage payment without netting out equity built.
• Ignoring selling costs, which can erase several years of apparent savings from owning.
• Assuming appreciation is guaranteed rather than a variable assumption.
• Leaving out maintenance, which is a real recurring cost that renters generally do not pay directly.
• Using a single-year snapshot instead of a multi-year comparison, which hides how the answer changes with holding period.
• Ignoring the opportunity cost of the down payment, especially when comparing a large down payment against a smaller one plus mortgage insurance.

What no calculator can price

Mobility, job security, maintenance effort, tenure stability and personal preference are real factors and are not captured by any cost model. Use the numbers as one input, not the decision.

Frequently asked questions

Sources and references

• CFPB — Buying a house: tools and resources — Cost categories buyers take on that renters do not.
• IRS Publication 936 — Home mortgage interest deduction — Rules that determine whether owning delivers a tax benefit.
• BLS — Consumer Price Index, rent of primary residence — Historical rent growth data behind rent-inflation assumptions.