Renting vs buying in the United States
In the US, consumer lending is overseen by the Consumer Financial Protection Bureau (CFPB). Under the Qualified Mortgage rules, lenders generally look for a total debt-to-income (DTI) ratio at or below 43%, which caps how much you can borrow against your income. Conforming loan limits are set each year by the Federal Housing Finance Agency (FHFA), and anything above them becomes a jumbo loan with stricter terms.
The 30-year fixed-rate mortgage is the American default, and interest is typically compounded monthly. Because the rate is fixed for the full term, your payment is predictable, which is why the amortization schedule below matters so much: in the early years most of each payment is interest, not principal.
A worked example
On a $400,000 loan at 6.8% over 30 years, the monthly principal and interest is roughly $2,608, and you pay about $538,000 in interest across the full term. Adding just $200 a month to principal shortens the loan by around five years and saves tens of thousands in interest. Property taxes vary widely by state and county (broadly 0.3% to 2.2% of value per year), so your true monthly cost is higher than principal and interest alone.
- Regulator: CFPB, with rates anchored to the Federal Reserve.
- Key rule: Qualified Mortgage DTI guideline around 43%.
- Upfront costs: closing costs plus, in some states, a transfer tax.
US-specific questions
What DTI do US lenders want to see?
Under the Qualified Mortgage framework, most lenders target a total debt-to-income ratio of about 43% or less, though some programs allow more with compensating factors like a large down payment or strong credit.
Why is so much of my early payment interest?
US mortgages amortize, so interest is charged on the outstanding balance. Early on the balance is large, so most of the payment is interest. As the balance falls, more of each payment goes to principal.
Rent vs. Buy: The True Cost Comparison
Deciding whether to rent or buy is rarely as simple as "rent is throwing money away." Both options carry costs that never build equity, and the right choice depends on your time horizon, local prices, and what you would do with the money you don't tie up in a deposit. This guide lays out the full framework a good rent-vs-buy calculator uses.
The Costs That Don't Build Equity
Renting's obvious non-equity cost is rent itself. But buying has its own "phantom" costs that also build no equity: mortgage interest, property taxes, insurance, maintenance (often estimated at ~1% of the home value per year), and one-off transaction costs on the way in and out. A fair comparison pits rent against the sum of these ownership costs - not against the entire mortgage payment, part of which is forced savings.
The Break-Even Horizon
Because buying front-loads large transaction costs (stamp duty or transfer tax, legal fees, agent fees), it usually takes several years of ownership before buying pulls ahead of renting. This is the break-even point. If you expect to move before it, renting is often the financially stronger choice; stay well beyond it, and ownership typically wins as the mortgage amortizes and (historically) the property appreciates.
Opportunity Cost of the Deposit
A deposit is a large sum of capital. If you rent instead of buying, that capital could be invested. A rigorous comparison therefore models the "rent and invest the difference" scenario: the renter's net worth is their invested deposit plus any monthly savings, compounded at an assumed return, versus the buyer's home equity plus appreciation. The winner is simply whoever has the higher net worth at your planned sale date.
Frequently Asked Questions
Is renting really 'throwing money away'?
Not necessarily. Rent buys you flexibility and frees your capital to invest. Meanwhile a large share of an early mortgage payment goes to interest - money that also builds no equity. The honest comparison is total non-equity cost on each side, plus the opportunity cost of the deposit.
What is the break-even point?
It's the number of years you must own before buying becomes cheaper than renting, after accounting for transaction costs. Sell before it and you likely lose money versus renting; hold past it and ownership tends to win.
How much should I budget for maintenance?
A common rule of thumb is about 1% of the property's value per year, though older homes can cost more. Renters generally avoid these costs, which is a real and often overlooked advantage of renting.
Does home price appreciation guarantee buying wins?
No. Appreciation helps buyers, but it isn't guaranteed and varies widely by location and period. A robust decision holds up even under a modest-appreciation scenario rather than assuming prices always rise quickly.