How long do I need to stay in a home for buying to make sense?

The typical breakeven period is 5-7 years. With 6% transaction costs (3% closing + 3% selling) and 1% annual maintenance, you need enough appreciation and principal paydown to overcome these costs. In high-cost markets like San Francisco or NYC, the breakeven can be 10+ years. In affordable markets with lower prices, it can be as short as 3 years. Always run the numbers for your specific situation.

What are the hidden costs of homeownership?

Beyond the mortgage payment, budget for: property taxes (0.3-2.5% of value), homeowners insurance ($800-2,000/year), maintenance (1-2% of value annually), HOA fees ($100-500+/month), utilities (often higher than rentals), trash/water/sewer, pest control, lawn care, and major repairs (roof, HVAC, plumbing). The 1% rule is a good starting point but older homes may require 2% or more annually.

How does the opportunity cost of my down payment factor in?

Your down payment is money that could otherwise be invested in the stock market. At 7% average annual return, $80K invested grows to $160K in 10 years. This opportunity cost is a real cost of buying - you're choosing home equity over market returns. The calculator accounts for this through the alternative investment return input. If you expect strong market returns, renting becomes relatively more attractive.

Is buying always a good investment?

No. A primary residence is first a place to live and secondarily an investment. Homes appreciate 3-5% on average but can decline (2008, 2022 corrections). After transaction costs, maintenance, taxes, and insurance, net returns often underperform stocks. The real financial benefit of buying comes from: forced savings (mortgage principal paydown), inflation hedging (fixed-rate mortgage), and tax benefits (mortgage interest deduction for itemizers).

How do interest rates affect the rent vs buy decision?

Higher rates increase monthly mortgage payments, making renting relatively more attractive. A 1% rate increase adds approximately $250/month to the payment on a $400K loan, shifting the breakeven horizon by 2-3 years. At 7%+ rates, renting often wins in the short-to-medium term. At 4-5% rates, buying wins sooner. This is why rate-sensitive buyers should consider rate buydowns or adjustable-rate mortgages.

What about tax benefits of homeownership?

Homeowners can deduct mortgage interest on the first $750K of acquisition debt and property taxes up to $10K (SALT cap). However, since the 2018 tax reform doubled the standard deduction, only about 10% of taxpayers itemize - most don't benefit from these deductions. The mortgage interest deduction is more valuable in high-cost areas and for higher-income households with larger mortgages.

Does renting ever make more financial sense long-term?

Yes. If you invest the difference between renting and buying costs in the stock market, renting can outperform buying even over 10-15 years in high-cost markets. The rent-vs-buy decision isn't just about housing costs - it's about the opportunity cost of your down payment and ongoing savings. In markets where price-to-rent ratios exceed 20, renting and investing often wins. Use [NerdWallet](https://nerdwallet.com) to explore market-specific data.

What if I can't afford a 20% down payment?

Many conventional loans require as little as 3-5% down. FHA loans require 3.5%. However, less than 20% down means paying PMI (0.5-2% of loan amount annually) until you reach 20% equity. PMI adds to your monthly cost and should be factored into the comparison. A smaller down payment also means a larger loan and higher monthly payment, potentially making buying less attractive relative to renting.

賃貸vs購入比較計算機

住宅ローン、税金、保険、維持費、投資収益を考慮して賃貸と購入の総コストを比較します。