💰 RETIREMENT & FIRE
Buy vs Rent a House: When the Math Actually Says Rent
Owning a home is the default 'smart' move in most cultures. The math says it's a good move only if you stay 7+ years and your alternative isn't an index fund.
Take on a mortgage and ownership — equity builds, but so do maintenance bills and reduced flexibility
Pay for housing without ownership — flexibility, predictable costs, capital free to invest
Buying beats renting after 5–7 years if rents rise faster than your mortgage holds. Renting beats buying if you'd otherwise invest the down payment, you might move within 5 years, or maintenance shocks would derail your finances. The 'throwing money away' framing is wrong — rent buys flexibility and zero maintenance. Run the numbers, not the cliché.
Side by Side
Green = the side that wins on that dimension. A tradeoff means most rows are split.
What Each Path Actually Feels Like
🏡 Buy
- Mortgage payment fixed (vs rent that rises with inflation)
- Equity builds with each payment + appreciation potential
- Tax benefits (interest deduction in some countries)
- Stability — landlord can't kick you out
- Can renovate to your taste
- 5–7 years to break even on transaction costs
- Down payment locks up huge capital that could compound
- Maintenance averages 1–3% of home value per year
- Property taxes + insurance ongoing forever
- Reduced mobility — selling is expensive and slow
🔑 Rent
- Down payment free to invest in index funds (~7% real return)
- Maintenance is the landlord's problem, not yours
- Move freely when life shifts (job, relationship, kids)
- No property tax, no broken furnaces, no roof replacements
- Predictable monthly cost (one number, no surprises)
- Rent rises with inflation over decades
- No equity — payments don't accumulate value for you
- Landlord can decide not to renew
- Limited renovation/customization
- 'Throwing money away' social narrative is hard to escape
Realistic Scenarios
How the tradeoff plays out for different life situations:
Stable Family, 15-Year Plan
Married couple, 35, two kids, $130k joint income, plans to stay in same city through kids' school. Buying wins clearly — break-even hits at year 6, equity by year 15 is significant. Stability matters more than flexibility.
Career-Mobile Couple, 30s
Both work in tech, change jobs every 2–3 years, no kids yet. Renting wins — they'd lose 5–10% of home value every move. Down payment in index funds compounds while they keep optionality.
Single Professional, 28, High-Cost City
$110k salary in SF/NYC. Median home: $1.2M+. Renting at $3,000 vs $7,000+ ownership cost. Renting + investing the difference compounds to $400k+ over 10 years. Math nukes the buy case.
Frequently Asked Questions
What's the real break-even for buying vs renting?
Roughly 5–7 years for most markets, accounting for transaction costs (~10% of home price total: 2–3% buying + 5–7% selling). If you might move sooner, math says rent.
Doesn't renting just throw money away?
No more than buying does — your mortgage interest, property tax, maintenance, and HOA are also 'thrown away'. The actual question: how much of your housing payment becomes equity? Early in a mortgage, ~25% of the payment builds equity, the rest is interest + costs.
What about 'forced savings' through mortgage?
Real argument — most people don't have the discipline to invest the rent-vs-mortgage difference. If you wouldn't actually invest the savings, buying becomes more attractive even when math is even.
Should I buy if interest rates drop?
Not automatically. Lower rates mean lower payment but they also push prices up (more buyers can afford more). The relative buy-vs-rent math doesn't shift as much as people think — flexibility and stay-length still dominate.
What if rents are rising 5%+ a year?
Then buying gets significantly better. In hot rental markets where landlords push rent 5–10% annually, locking in a fixed mortgage payment is a real hedge. Run the math with realistic rent inflation, not headline numbers.
Map This Decision to Your Actual Life
Open Lifeplanr, set your real numbers, and see the tradeoff on your life calendar. Free to try, 14-day Pro trial.
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