When Does Buying Actually Beat Renting?
The "buy vs rent" debate is usually argued on vibes. The math is not actually that hard, and it almost always points in a specific direction for your situation.
The Five Variables That Decide It
1. Years you will stay. The single biggest variable. Break-even is typically 5–7 years. Under 3 years and buying almost always loses (closing costs + realtor fees on exit wipe out any equity gained).
2. Rent vs total monthly cost of ownership. Total cost is not just mortgage — it is mortgage + property tax + insurance + maintenance (1%–2% of price/year) + HOA + opportunity cost on the down payment. In most US markets in 2026, renting is 20%–40% cheaper per month than owning a comparable property.
3. Expected home appreciation. Historically 3–4% per year national average. Some markets are flat or declining. A stagnant market turns buying into a losing proposition quickly.
4. Expected investment return on alternative. If you did not buy, the down payment would be invested. Assume 7% nominal, 5% real. This is the "opportunity cost" renters are often told they are "throwing away" on rent, but renters invest that saved difference.
5. Tax treatment. Mortgage interest deduction only matters if you itemize above the standard deduction ($15,000 single / $30,000 married in 2026). Most middle-income buyers take the standard deduction and get no mortgage tax benefit.
The Honest Scenarios
Buy wins: - You will stay 10+ years. - Local rent is comparable to or higher than monthly ownership cost. - Market appreciation is 3%+ annually. - You will occupy the property the entire time (no renting out).
Rent wins: - You might move in 3–5 years. - Local rent is 30%+ cheaper than ownership. - Market is flat or declining. - You would have to drain retirement accounts to cover down payment. - You could not keep a 6-month emergency fund post-closing.
Why This Calculator Helps Either Way
Use the affordability calculator to see the monthly cost of buying at your target price. Compare that to current rent in comparable homes. If the ownership cost is more than 20% above rent, run a rent-vs-buy spreadsheet before proceeding. If it is less than 20% above rent (or at parity), buying is usually right if you plan to stay 5+ years.