For about a decade, the standard advice was simple: rent for five years or less, buy if you'll stay longer. That math worked when 30-year mortgage rates were in the 3s and home prices in San Diego had been climbing like clockwork. Neither of those conditions holds in 2026.
The question buyers actually need to answer right now is narrower: at today's rates and today's San Diego prices, how long do I need to own before buying beats renting on a pure cash-flow basis? The answer, run honestly across three price points, is longer than most calculators will tell you.
The setup
Three scenarios, three different budgets — chosen to bracket what most San Diego buyers are actually shopping in 2026. All use the current Freddie Mac average 30-year rate of 6.23%1 and a 1.18% effective property tax rate, which sits within the 1.02%–1.19% band typical for San Diego County tax rate areas.2 Rent figures use the most recent HUD Fair Market Rent4 and Zumper data for San Diego, which run between $2,750 and $3,001 per month for a typical 2-bedroom in 2026.3
The break-even calculation answers one question: how many years of owning does it take before the cumulative cost of owning falls below the cumulative cost of renting the equivalent unit? It accounts for mortgage interest, property tax, insurance, HOA, maintenance, opportunity cost on the down payment, and modest home appreciation. It does not count emotional value, lifestyle preferences, or the real possibility that you'll move sooner than planned.
The three scenarios
| Line item | $750K condo | $1.0M townhome | $1.5M house |
|---|---|---|---|
| Comparable rent | $3,000 | $4,200 | $5,800 |
| Down payment (20%) | $150,000 | $200,000 | $300,000 |
| Loan amount | $600,000 | $800,000 | $1,200,000 |
| P&I (6.23%, 30yr) | $3,687 | $4,915 | $7,374 |
| Property tax (1.18%) | $738 | $983 | $1,475 |
| Insurance + HOA | $420 | $320 | $280 |
| Maintenance (1% of value/yr) | $625 | $833 | $1,250 |
| Total monthly own | $5,470 | $7,051 | $10,379 |
| Own minus rent (monthly) | +$2,470 | +$2,851 | +$4,579 |
| Break-even on cash flow | ~7 years | ~7 years | ~8 years |
The break-even row assumes 3% annual home appreciation, the down payment invested at 6% annually as the opportunity cost benchmark, and rent rising at 3% per year. Faster appreciation makes owning win sooner; lower appreciation pushes break-even out further. The 5-year rule of thumb that worked at sub-4% rates does not apply at 6%+ rates.
At a 3.0% rate on the same $1M townhome, P&I would be $3,373 instead of $4,915 — about $1,500 less per month. Owning beat renting at break-even in 4–5 years. The current rate environment more than doubles the time it takes for owning to pay off on a pure cash-flow basis.
What pushes break-even shorter
The base case above is conservative. Three things meaningfully change the answer in the buyer's favor:
- Faster appreciation. San Diego averaged roughly 6% annual price growth over the last decade, well above the 3% used in the base case. If that pace returns, break-even moves to 5–6 years.
- The mortgage interest deduction. For households that itemize and stay under the $750,000 acquisition debt cap, the federal tax break can shave $400–$700 per month off the after-tax cost of owning the $1M townhome scenario.
- Rent inflation. If rent rises faster than the 3% baseline — and California's statewide cap is currently 5% plus inflation for buildings older than 15 years3 — the renting line gets steeper and break-even shortens.
What pushes break-even longer
And three things that quietly extend it:
- Mello-Roos. If the parcel carries a Community Facilities District assessment — common in newer master-planned communities — that's another $300–$650 per month on the owning side that doesn't exist on the renting side. The Mello-Roos breakdown covers which San Diego neighborhoods carry the heaviest CFDs.
- Selling costs. The 6% commission plus title and transfer fees typically eat 7–8% of sale price. On a $1M home, that's $70K–$80K — a real chunk of any equity gain in the first 5 years.
- The supplemental tax bill. First-time buyers often miss this one entirely. The county reassesses at purchase price, generates a one-time supplemental bill, and it isn't escrowed. More on the supplemental bill here.
Run the math on your specific San Diego scenario.
Open the calculator →The honest answer
If you're confident you'll stay 8+ years in the same San Diego home, owning still wins on cash flow alone — and likely wins more once appreciation, tax effects, and forced savings are factored in. If you're not sure you'll be in the same home in 5 years, the math at current rates is genuinely close to a wash, and the case for renting is stronger than it has been in a decade.
The decision isn't just financial. Stability, school enrollment, the ability to renovate, the freedom to leave with 60 days' notice — none of that fits in a spreadsheet. But a buyer who plugs today's rate into yesterday's break-even rule is going to misjudge the cash-flow side by years.
Break-even calculations are sensitive to assumptions about appreciation, rent inflation, opportunity cost, and tax treatment. Your actual outcome will depend on the specific parcel, your tax situation, and how long you stay. Educational content only — not legal, tax, or financial advice.
References
- Freddie Mac. (2026, April 23). Primary Mortgage Market Survey: U.S. weekly mortgage rate averages. https://www.freddiemac.com/pmms
- San Diego County Treasurer-Tax Collector. (n.d.). Secured property taxes. Retrieved April 28, 2026, from https://www.sdttc.com/content/ttc/en/tax-collection/secured-property-taxes.html
- Zumper. (2026, April). Average rent in San Diego, CA and rent price trends. Retrieved April 28, 2026, from https://www.zumper.com/rent-research/san-diego-ca
- U.S. Department of Housing and Urban Development. (2026). Fair Market Rents (FMRs) for San Diego-Carlsbad, CA HUD Metro FMR Area. Retrieved April 28, 2026, from https://www.huduser.gov/portal/datasets/fmr.html