The real estate
question.
Housing is usually the largest line item in any household budget. Buy or rent is the most common decision in personal finance. Here is the honest math, without the "renting is throwing money away" myth or the "buying always builds wealth" myth.
This page covers personal finance fundamentals that apply regardless of your view on Bitcoin or fiat currencyfiat currencyMoney declared legal tender by a government, not backed by a physical commodity. Its value rests on trust in the issuing government.Full definition.
Roughly 5 percent of a home's value evaporates every year to property tax, maintenance, mortgage interest, and the opportunity costopportunity costWhat you silently give up when you pick one option over another. Spending $100 today on dinner means giving up whatever that $100 could have grown into if you had invested it instead.Full definition of the down payment. If equivalent rent is below that 5 percent figure, renting and investing the difference wins on the math. If above, buying wins. The decision is not about pride or "throwing money away." It is about a 5 percent number and your time horizon. Plan to stay 7+ years and the transaction costs amortize. Plan to move in 3 years and they crush you.
On this page
The 5% rule (Ben Felix)
Ben Felix at PWL Capital popularized a clean framework for the rent-vs-buy decision. The unrecoverable annual cost of owning a home is roughly 5 percent of the home's value: about 1 percent for property tax, 1 percent for maintenance, and 3 percent for cost of capital (mortgage interest, plus what the down payment could earn if invested elsewhere beyond the home's expected price growth).
If 5 percent of the home's value exceeds annual rent for an equivalent home, renting and investing the difference is mathematically better, before any non-financial considerations. If annual rent exceeds 5 percent of equivalent home value, buying is better.
A $500,000 home costs roughly $25,000 a year unrecoverably. If you can rent a comparable home for $1,800/month ($21,600/year), renting wins on paper, before factoring in flexibility and the absence of maintenance hassle. If equivalent rent is $2,400/month ($28,800/year), buying wins on paper.
The real costs of owning
The mortgage payment is just the start. The full cost of homeownership has many lines that show up unevenly through the year and are easy to underestimate.
"Renting is throwing money away" - the myth
Rent buys a year of housing. So does the 5 percent of home value that an owner spends on tax, maintenance, and cost of capital. The owner also gets a small slice of "principal paydown" each month, which is real, but the early years of a 30-year mortgage are mostly interest, not principal.
In year one of a $400,000 mortgage at 7 percent, roughly $28,000 of the $32,000 in payments is interest. That interest is not building equity; it is being paid to the bank. Calling that "not throwing money away" while calling rent payments "throwing money away" is rhetoric, not math.
The honest framing: rent buys a year of flexibility, no maintenance burden, and zero exposure to housing market drawdowns. Owning buys a year of stability, potential equity growth, and exposure (positive or negative) to the housing market. Both purchases are real. Neither is throwing money away.
When to buy
Transaction costs (8 to 12 percent round-trip) need years to amortize. A 3-year stay almost always loses money on net even in a flat market.
A relocation in year 2 forces you to either sell at transaction-cost loss or become an accidental landlord. Buy when both your career and family situation are predictable for the next 5 to 7 years.
PMI on lower down payments is real money. FHA loans work but add monthly insurance for the life of the loan in many cases. The 20 percent floor exists for a reason.
Run the 5 percent rule for your specific market. Buying makes financial sense in many of the Midwest and South. Buying often does not make financial sense in much of coastal California, NYC, Seattle, and Boston unless rent is extreme.
When to rent
If your income trajectory depends on the option to relocate (tech, sales, consulting, federal jobs), the flexibility of renting is worth more than the equity of owning.
A mortgage is a fixed obligation. Rent can be downsized at lease renewal. Variable-income households (freelancers, founders, commission-heavy roles) often benefit from the flexibility of renting until cash flowcash flowMoney coming in minus money going out over a month or year. A positive number means you earn more than you spend; negative means the opposite.Full definition stabilizes.
If 5 percent of home value massively exceeds equivalent rent, the math says rent and invest the difference. Buying for "lifestyle" reasons in an overpriced market is a luxury purchase, not a financial one. That is a legitimate choice; just be honest about it.
Bitcoin and the down payment question
Bitcoin is too volatile to be a down payment fund. A 40 percent drawdown in the 18 months you are saving for a house can erase the down payment and the closing costs together. Down payment money lives in HYSA or short-term Treasuries.
The harder question: should you sell your existing Bitcoin position to fund a larger down payment? For Bitcoin maximalists, the answer is usually no. For more diversified investors, selling 20 to 30 percent of a Bitcoin position to push a down payment from 10 to 20 percent is a reasonable trade-off. The PMI savings are immediate and certain; the foregone Bitcoin upside is potential and uncertain.
A smaller subset of buyers in some jurisdictions now uses Bitcoin-collateralized loans to fund down payments without selling. The mechanics carry liquidation risk during sharp Bitcoin drawdowns and should be approached with the same caution as any margin product.
Where to go from here
Sources
Verify badges in the text link to these sources. Figures, rates and rules change: check each source’s date before acting on it.
- FEMA National Flood Insurance Program, FEMA FloodSmart (National Flood Insurance Program) ↩
- Ben Felix, "The 5% Rule of Real Estate Investing" (PWL Capital / Rational Reminder) - youtube.com/@BenFelixCSI
- Federal Housing Finance Agency House Price Index - fhfa.gov/data/hpi
- National Association of Realtors median home price data - nar.realtor
- NYT Rent vs Buy calculator - nytimes.com
- Tax Foundation property tax rates by state - taxfoundation.org
Last updated . Not financial advice. Do your own research. Disclosures · How pages are reviewed