Housing Decision
Rent vs Buy
Estimator
The math behind rent vs buy
Most people assume buying is always better than renting because "you're throwing money away on rent." But that's not always true — and the math depends heavily on how long you stay.
When you buy: You build equity, benefit from appreciation, and eventually own the home free and clear. But you also pay property taxes, maintenance, insurance, interest, and transaction costs (6% when you sell).
When you rent: You pay rent that typically rises over time. But your down payment and any monthly savings can be invested in the stock market, which historically returns about 7% per year after inflation.
The breakeven point is usually 3-5 years. Stay longer than that, and buying typically wins. Sell sooner, and the transaction costs eat up any appreciation.
The 5-year rule (and why it exists)
Buying a home costs about 2-3% of the purchase price in closing costs. Selling costs about 6% in realtor commissions. That's 8-9% of your home's value just in transaction fees.
If you buy a $400,000 home, you'll pay roughly $30,000 in combined transaction costs. If you sell after two years and the home has appreciated 3% per year ($24,000), you've actually lost money — the transaction costs exceeded your appreciation.
Hold for 10 years, and that same 3% annual appreciation grows the home to $537,000. Now the transaction costs ($32,000) are a fraction of your gains ($137,000).
The breakeven point: In most markets, buying beats renting if you stay at least 4-6 years. Under 3 years, renting almost always wins.
When each choice makes sense
01
Buy if you're staying 7+ years
Transaction costs get diluted, equity builds, and appreciation compounds. You'll almost certainly come out ahead of renting.
02
Rent if you're staying under 3 years
Closing costs and realtor fees will eat any gains. Rent and invest the difference instead.
03
Buy in slow-appreciation markets
If home values rise slowly (1-2%/year), you need even more time to break even. Run the numbers with local data.
04
Rent in expensive coastal cities
In San Francisco or NYC, price-to-rent ratios are so high that renting + investing often wins indefinitely.
Real example
Scenario: Rent an apartment for $2,000/month or buy a comparable home for $500,000 with 10% down ($50,000) and a 6.5% mortgage.
After 5 years, buying wins by ~$25,000. After 3 years, roughly a tie. After 7 years, buying wins by ~$70,000.
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