Deciding between buying a house with cash versus a mortgage comes down to what the money would otherwise do. Cash gets you a faster close, a stronger offer, and no interest bill. A mortgage keeps your capital free to earn returns, spares you from selling investments and triggering capital gains, and generally builds more wealth over 30 years when borrowing costs sit below long-run market returns. Neither answer is universal. With 30-year fixed rates averaging 6.11% as of March 2026,1Freddie Mac. Mortgage Rates the tradeoff is close enough that your own numbers decide it.
What Cash Actually Saves You
Cash buyers skip a full layer of lender-related fees. Origination fees typically run 0.5% to 1% of the loan amount, so a $400,000 mortgage costs $2,000 to $4,000 before you’ve locked a rate. Lenders also require a professional appraisal, usually $350 to $550 for a single-family home. If your down payment is under 20%, you’ll pay private mortgage insurance until you reach that equity threshold. Freddie Mac estimates PMI runs roughly $30 to $70 per month for every $100,000 borrowed.2Freddie Mac. Breaking Down Private Mortgage Insurance (PMI)
A cash transaction strips all of that away. No origination fee, no lender-required appraisal, no PMI, no credit report charges, no prepaid interest at closing. What’s left is short: the purchase price, title insurance, recording fees (typically $30 to $60 for a deed, varying by county), and any transfer taxes your jurisdiction charges. Title insurance still makes sense because it protects against ownership disputes unrelated to financing, but you avoid the separate lender’s title policy that financed buyers must carry.
Speed and the Cash Discount
A financed purchase takes roughly 41 days to close on average because the lender needs time for underwriting, appraisal review, and compliance checks. A cash deal can wrap in one to two weeks. In a competitive market, that timeline difference alone can beat a higher offer contingent on financing.
Sellers also value the certainty. A financed offer carries the risk that the loan falls through late in the process because of an appraisal gap, an underwriting problem, or a change in the buyer’s employment. Cash removes that risk. Data from Cotality (formerly CoreLogic) found that in 2025, cash purchases closed at an average of 9% below what financed buyers paid for comparable properties. At a median home price around $410,000, that’s roughly $37,000. Some of that gap reflects the kinds of properties cash buyers target, but the leverage is real: sellers accept less money for a clean close.
The Opportunity Cost Working Against Cash
Every dollar locked inside the house is a dollar that can’t earn returns elsewhere. The S&P 500 has delivered roughly 10% to 11% annualized returns over long historical periods. With 30-year fixed rates around 6.11%, the spread between potential investment returns and borrowing costs is where leverage builds wealth.
A simplified example: a buyer with $400,000 in cash could purchase outright, or put 20% down ($80,000) and invest the remaining $320,000. Even after the monthly mortgage payment, that invested capital has historically grown faster than the debt costs. Over 30 years, the gap compounds. The house appreciates the same way regardless of how you paid for it.
The honest counterargument is that market returns aren’t guaranteed. The S&P 500 can drop 30% in a single year. Your mortgage payment doesn’t move. If watching invested cash swing around while you’re carrying a mortgage would cost you sleep, that’s a real cost even when the math favors leverage. The opportunity cost argument works best for buyers with substantial assets beyond the home purchase who can leave the invested funds untouched for a decade or more.
The Tax Hit From Selling Investments
If your cash sits in a brokerage account rather than a savings account, funding an all-cash purchase means selling positions and triggering capital gains taxes. This cost rarely appears in the “pay cash and save on interest” calculation, and it can be substantial.
Long-term capital gains (on investments held longer than one year) are taxed at 0%, 15%, or 20% depending on taxable income. For 2026, single filers hit the 15% rate at $49,450 in taxable income and married joint filers at $98,900.3Tax Foundation. 2026 Tax Brackets and Federal Income Tax Rates Short-term gains on assets held a year or less are taxed at ordinary income rates, which can reach 37%. Higher earners also face the 3.8% net investment income tax when modified adjusted gross income exceeds $250,000 (married filing jointly) or $200,000 (single).4Internal Revenue Service. Topic No. 559, Net Investment Income Tax
The practical impact: a married couple selling $400,000 of stock with $150,000 in long-term gains could owe $22,500 in federal capital gains tax at the 15% rate, plus another $5,700 or so if the NIIT applies. That’s $28,200 in taxes that wouldn’t exist if they’d financed instead. Some of it can be managed through tax-loss harvesting, but the core point stands. Liquidating to pay cash isn’t free, and that tax cost belongs in the comparison against mortgage interest.
Don’t Overweight the Mortgage Interest Deduction
The mortgage interest deduction is the tax benefit most people cite when arguing for financing. You can deduct interest on up to $750,000 of mortgage debt used to buy, build, or substantially improve your home, as long as you itemize.5Office of the Law Revision Counsel. 26 US Code 163 – Interest Cash buyers get nothing comparable.
The catch: the deduction only helps if your total itemized deductions exceed the standard deduction. For 2026, the standard deduction is $32,200 for married couples filing jointly and $16,100 for single filers.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A married couple with a $300,000 mortgage at 6% pays roughly $18,000 in interest during the first year. Add the $10,000 SALT cap and total itemized deductions come to about $28,000, still below $32,200. They’d take the standard deduction anyway, and the interest write-off is worth nothing.
The deduction starts mattering when the mortgage is large enough to push itemized deductions above the threshold. A married couple generally needs a mortgage north of $400,000 before the interest alone, combined with SALT, clears $32,200. If your mortgage is modest, treat the deduction as roughly zero when comparing paths.
Risks That Only Cash Buyers Face
The most fundamental risk is that your wealth becomes concentrated in a single illiquid asset. If you need $50,000 for a medical emergency three months after closing, you can’t peel it off the house. Your options are a home equity line of credit (which takes weeks to set up and charges interest) or selling the property (months, plus 5% to 6% in transaction fees). Buyers who would deplete most of their savings to pay cash are taking on liquidity risk that can turn a minor disruption into a serious one.
Some cash buyers waive inspections and appraisals to make offers more competitive. Experienced investors do this with eyes open. First-time cash buyers often don’t. Without an inspection, you won’t know that the HVAC needs replacement or the foundation has problems, and you lose the ability to renegotiate based on what an inspector finds.
Mortgage lenders require hazard insurance as a loan condition, so financed buyers always have coverage. Cash buyers face no such requirement and sometimes skip homeowners insurance to save money. A fire, storm, or liability claim without insurance can wipe out both the home and the equity in it.
Cash purchases also involve wiring large sums, which makes buyers targets for wire fraud. Criminals hack email accounts of real estate agents, title companies, or attorneys and send fraudulent wire instructions that redirect funds. The FBI has tracked sharp increases in real estate wire fraud, with losses exceeding $213 million in 2020 alone. Always verify wire instructions by phone using a number you’ve independently confirmed, not one pulled from an email.
Risks That Only Mortgage Buyers Face
The obvious risk is foreclosure. Miss enough payments and the lender takes the house. Adequate emergency reserves and stable income keep this manageable, but it exists. Cash buyers never face it.
PMI adds cost for buyers who put down less than 20%. Those premiums don’t build equity or benefit you in any way; they protect the lender if you default. You can request PMI removal at 20% equity, and your servicer must automatically cancel it at 22%, but until then it’s a drag on the monthly budget.2Freddie Mac. Breaking Down Private Mortgage Insurance (PMI)
Qualifying can itself be a hurdle. Fannie Mae caps the debt-to-income ratio at 50% for loans processed through automated underwriting, and at 36% to 45% for manually underwritten loans depending on credit score and reserves.7Fannie Mae. Debt-to-Income Ratios Buyers with high existing debt may not qualify for the loan amount they need, a problem cash buyers never encounter.
The 90-Day Refinance Middle Path
There’s a hybrid that captures parts of both approaches. Buy with cash to get the speed, certainty, and negotiating leverage. Then, within 90 days, take out a mortgage against the property and invest the proceeds. The IRS treats a mortgage taken out within 90 days of a cash purchase as acquisition indebtedness, meaning you can deduct the interest as if you’d financed from the start.8Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction
The deductible amount is capped at the purchase price. Pay $400,000 in cash, take out a $350,000 mortgage within 90 days, and the full $350,000 qualifies. Take out $500,000, and only $400,000 qualifies. This works for buyers who have the liquidity to purchase outright but don’t want to permanently tie up the capital. You’ll still pay origination fees, appraisal costs, and closing costs on the mortgage, so the lender fees aren’t avoided, just delayed.
How to Choose
Pay cash if the purchase would consume less than half your liquid net worth, if you’re at or near retirement and want to minimize fixed obligations, or if you’re competing in a market where speed and certainty decide who gets the house. Finance if you’d need to liquidate significant investments and trigger capital gains, if you have higher-return uses for the capital, or if paying cash would leave you without a meaningful emergency fund. Consider the 90-day refinance if you have the cash and want the competitive advantage now but plan to restore liquidity afterward. Whatever you choose, don’t let the mortgage interest deduction drive the decision unless your loan is large enough for itemizing to beat the standard deduction.