San Francisco Buy vs Rent: When Buying Wins

At 6.53%—the Freddie Mac PMMS rate as of May 28, 2026—a $1.5 million San Francisco condo produces a monthly ownership cost of roughly $11,200 before any tax offsets. The equivalent two-bedroom rental runs $5,000 a month. That $6,200 monthly gap is the price of the ownership option, and it has to be paid back through appreciation, rent inflation, and equity accumulation before buying makes financial sense.

This is a math problem, not a lifestyle question. The answer depends entirely on how long you stay, what happens to rents, and what your $300,000 down payment earns if you invest it instead.

Key Numbers at a Glance

Sources: Redfin (January 2026 mid-tier median); Freddie Mac PMMS (May 28, 2026); Zumper SF rental data (2025); Zillow SF metro 2BR average ($5,100/mo). Ownership cost includes P&I ($7,636), property tax ($1,478/mo), HOA ($650/mo), homeowners insurance ($200/mo), and maintenance at 1% annually ($1,250/mo).

The Ownership Cost Stack

Breaking down the $11,214 monthly figure matters because each component behaves differently over time. Principal and interest is fixed for the life of the loan—but property taxes, HOA fees, and maintenance are not.

Sources: Freddie Mac PMMS (May 28, 2026); SF Treasurer & Tax Collector (FY 2025–26 secured rate); Realtor.com HOA Report (January 2026); Redfin standard maintenance benchmark.

One factor rarely discussed in SF condo coverage: HOA fees across the San Francisco metro hit a median of $502 per month in 2025, up sharply from $360 in 2019, according to Realtor.com data cited by Axios. Insurance cost increases are driving much of that jump. For a mid-tier building—not luxury, but not aging stock either—$650/month is a realistic budget figure. Older buildings or those undergoing reserve fund catch-ups can run $800 to $1,200.

The Tax Benefit: Bigger Than It Was, Smaller Than You Think

The One Big Beautiful Bill Act, enacted in 2025, raised the state and local tax deduction cap—commonly called the SALT cap—from $10,000 to $40,000 for tax year 2025, rising to $40,400 in 2026. For a $150k household filing jointly, this matters: SF property taxes alone run $17,740 annually, and California imposes a top marginal income tax rate of 9.3% on income above roughly $66,000 for joint filers. Combined SALT liability at $150k income easily exceeds the old $10k cap. Under the new rules, the full property tax bill is deductible (subject to the SALT cap), which restores meaningful value to itemizing for SF homeowners at this income level.

The phase-down kicks in only above $505,000 MAGI in 2026. At $150k income, the full $40,400 cap is available. The deduction reverts to $10,000 in 2030 unless Congress acts again—a planning variable that complicates any long-horizon buy vs. rent model.

Sources: Internal Revenue Code §163(h); One Big Beautiful Bill Act (2025); TCJA federal bracket structure (preserved under OBBBA). Marginal rate of 22% applies to joint filers earning $150k in 2026. Mortgage interest deduction applies to loans on a primary residence up to $750,000 of loan principal; loans above this threshold are partially non-deductible. A $1.2M loan exceeds the $750k cap—deductible interest is limited to 750/1,200 = 62.5% of total interest, reducing the deductible amount to approximately $48,000 and the tax saving to approximately $10,560. See methodology note.

That mortgage interest cap is important and often missed in simplified analyses. The Tax Cuts and Jobs Act limits mortgage interest deductions to loans up to $750,000. On a $1.2M loan, only 62.5% of the interest is deductible. That cuts the first-year mortgage interest tax savings from $16,896 to roughly $10,560—still meaningful, but $6,300 less than a simplified calculation suggests. The real dollar value of the homeownership tax benefit at SF price points is substantially lower than buyers expect going in.

The Opportunity Cost Side of the Ledger

Renters in this comparison don’t just avoid $6,214 in excess monthly costs—they also keep their $300,000 down payment invested. Assuming 7% annual return, consistent with the S&P 500 long-term historical average, that $300,000 grows as follows:

Calculation assumes 7% annual return, consistent with S&P 500 long-term historical average (Federal Reserve long-term return data). Returns are pre-tax; after-tax returns on capital gains would be lower. This represents the opportunity cost of the down payment that the renter retains and the buyer forgoes.

By year 15, the invested down payment generates over half a million dollars in investment growth that the buyer never sees. That’s before accounting for the monthly cash flow advantage the renter compounds by investing the $6,214 monthly difference. The full cumulative picture—ownership costs minus equity built minus appreciation versus renting costs plus portfolio growth—is what the break-even horizon calculation captures.

Finluxy Buy-Rent Break-Even Horizon

The Finluxy Buy-Rent Break-Even Horizon measures the number of years until cumulative ownership costs (including transaction costs at purchase and projected sale) equal cumulative renting costs (including the opportunity cost of the invested down payment). Three scenarios are modeled below using the stated assumptions. The NYT Rent vs. Buy calculator methodology informed the structure of this analysis.

Finluxy calculation. Buying cost stream includes: PITI ($9,964/mo), HOA ($650/mo), maintenance ($1,250/mo), buyer closing costs (2.5% = $37,560 at purchase), seller transaction costs at exit (6.5% = commission + closing costs, applied to projected future price). Tax offset: mortgage interest deduction capped at 62.5% of interest (loan exceeds $750k threshold); property tax deduction up to $40,400 SALT cap (2026); 22% federal marginal rate assumed. Renting cost stream includes: $5,000/mo rent growing at stated rate, renter’s insurance ($200/yr), and opportunity cost of $300,000 down payment at stated investment return. Appreciation applies to $1,502,382 base price.

The 13.4-year base-case horizon lands squarely in the cluster’s “market-dependent” range of 8–12 years—technically just above it. That’s a telling result: even under moderately favorable assumptions, San Francisco’s math requires more than a decade of ownership before buying crosses into net positive territory relative to renting. The only scenario that produces a sub-10-year break-even is the bull case, which requires 5% home appreciation, 5% rent growth, and a below-historical stock market return of 5% simultaneously. That’s a specific combination of outcomes, not a baseline expectation.

Compare this with the NYC break-even math, where similar price-to-rent dynamics produce comparable horizons—or the Austin post-surge break-even, where lower price points and higher rent growth tighten the math considerably. SF’s compressed price-to-rent ratio is the dominant driver here.

The Price-to-Rent Ratio Problem

SF’s mid-tier condo at $1,502,382 against a $5,000/month rent implies a price-to-rent ratio of roughly 25—calculated as the purchase price divided by annual rent ($1,502,382 ÷ $60,000 = 25.0). Historically, ratios above 20 signal that renting is relatively more efficient on a pure cost basis; ratios below 15 favor buying. San Francisco has been above 20 for most of the past decade.

What makes 2026 different from 2023 or 2024 is the direction of change. Condo prices in SF surged 24.4% year-over-year in March 2026—the largest annual gain since 2013—according to Redfin data, driven by the AI industry hiring boom and a return-to-office push from major employers. Rents are rising too, but more slowly: Zumper’s 2025 data shows 2BR apartments in SF at roughly $4,700–$5,000, up from softer pandemic-era lows. When prices rise faster than rents, the price-to-rent ratio widens, and the break-even horizon extends.

For anyone considering purchasing with a 3–5 year horizon, the short-term rent vs. buy math closes unfavorably in this market. Transaction costs alone—2.5% buying plus 6.5% selling—total 9% round-trip, or roughly $135,000 on a $1.5M purchase. That $135,000 has to be recovered through appreciation and equity build before a short-stay buyer breaks even on transaction costs alone.

The Overlooked Factor: What the AI Boom Changes About SF’s Model

Most buy vs. rent analyses for San Francisco model future appreciation using the city’s long-term historical average—roughly 3% annually over rolling 20-year periods, per NAR data. That’s the right baseline for a conservative model. But the current market context complicates it.

Redfin’s April 2026 report documented the largest single-year jump in SF metro home prices since March 2018, with the SF metro median hitting a record $1.7 million. The stated driver: AI company hiring at scale, with signing bonuses reportedly reaching $500,000 for some roles at leading firms, compressing inventory and accelerating demand from a concentrated, high-income buyer pool. What this means for the break-even model is that the bull case—5% annual appreciation—may be more plausible over the next several years than it was in 2022 or 2023. But it also means the renter’s invested portfolio benefits from the same bull environment driving tech stocks, which itself tends to push investment returns above the 7% base assumption. Both sides of the ledger accelerate together, which is why the break-even horizon doesn’t compress as much as the appreciation headline implies.

The more durable insight from the data: SF’s luxury rental market has historically provided high-quality housing at a significant cost discount to ownership in this city—a dynamic that persists even as rents rebound from pandemic lows. The renter isn’t sacrificing quality; they’re preserving optionality.

What This Looks Like for a $150k+ Household

A $150k annual household income puts a buyer in a specific bind in San Francisco. The $1.5M mid-tier condo at 20% down requires a $300,000 down payment—two full years of gross income. Monthly ownership costs of $11,214 represent roughly 89% of gross monthly income ($12,500). After taxes, that ratio pushes well past 100%. Conventional lending guidelines consider a debt-to-income ratio above 43% a threshold for loan approval risk. A $7,636/month P&I payment alone represents a 61% front-end ratio at $150k income.

In practice, this means a $150k household purchasing at $1.5M would require dual income near that level, co-borrowers, existing equity from a prior property, or substantial assets outside the down payment to qualify comfortably. The buy vs. rent analysis framework for $150k+ households treats income more as a household characteristic than a strict qualifier—many earners at this level have stock compensation, RSUs, or bonus income that substantially supplements base salary, particularly in SF’s tech employment base.

For a household with $150k in base income but $250k–$400k in total compensation including equity, the affordability picture shifts. But the break-even horizon doesn’t: 13.4 years in the base case is a function of price levels and rate, not income. A higher earner still has to hold the property for over a decade before buying beats the renter’s invested alternative—they just qualify more easily for the mortgage.

For households weighing whether to buy now or wait, the interest rate’s effect on the buy vs. rent decision is substantial. Every 50 basis points of rate reduction cuts the monthly P&I by roughly $350 on a $1.2M loan and compresses the break-even horizon by approximately 1.5–2 years in the base case. At 5.5%, the base-case break-even falls to roughly 10–11 years—within the market-dependent range. At 7.5%, it extends past 16 years. The rate matters more at SF price points than anywhere else in the country because the loan amounts magnify each basis point.

The full cost breakdown at the $1M price point shows how dramatically more favorable the math becomes at lower price levels. At $1M with a 20% down payment and the same rate, monthly ownership costs fall to approximately $7,500—still a premium over renting, but a far more manageable one with a correspondingly shorter break-even horizon.