Mortgage vs renting in 2026: the deep-dive break-even math

The conventional rent-vs-buy comparison goes like this. Mortgage payment $2,200/month, rent $2,500/month, "buying saves $300/month, plus you build equity." This comparison is wrong in three places at once.

First, it ignores the down payment opportunity cost. A 20% down on a $400,000 home is $80,000 sitting in the house instead of in an index fund. At a 7% expected real return, that capital would have grown to $610,000 over thirty years. The mortgage payment alone does not capture this, it shows up as the difference between two compounding lines, and after about year ten the gap is structural.

Second, it forgets the unrecoverable costs of ownership. Property tax, HOA, maintenance, insurance, and PMI all leave your wallet and never come back. They are economically equivalent to rent — they are the rent you pay to the local government, the homeowners' association, the roof, and the insurance company. The 5% rule says these total roughly 5% of home price per year. On a $400,000 home, that is $20,000 a year, or $1,667 a month, of pure cost.

Third, the comparison usually skips the time horizon. If you sell within five years, transaction costs (5-7% on the sell side) typically eat any equity you built. The break-even point on a normal 30-year fixed mortgage in 2026 conditions is somewhere between 5 and 9 years for most buyers. Below that horizon, renting wins on math more often than not.

Ben Felix popularized the 5% rule for a reason: it captures the unrecoverable cost of ownership in one number. The components: roughly 1% of home value per year in property tax (varies by state, 0.3% in Hawaii, 2.4% in New Jersey), 1% per year in maintenance, 1% per year in cost of capital on the down payment, and another 2% in insurance, HOA, opportunity cost adjustments, and PMI for sub-20% down. Total: about 5% per year.

The rule says: if 5% of the home price exceeds 12 months of rent on an equivalent property, buying loses on math at a typical horizon. A $400,000 home should rent for at least $1,667/month for buying to win on math alone, which is rare in expensive metros. Many San Francisco condos rent for less than 5% of their list price, which is the math case for renting and investing the difference.

The rule is not exact and depends on your specific tax situation, mortgage rate, and expected appreciation. But it is honest in a way the simple payment comparison is not. Plug your numbers into the rent-vs-buy calculator and see where the break-even falls.

The clean way to think about break-even is: at what year does the cumulative cost of buying (mortgage P&I + property tax + insurance + maintenance + HOA - any tax deduction benefit + opportunity cost of down payment + transaction costs) equal the cumulative cost of renting (rent + opportunity-cost gain on the saved down payment)?

For a $400,000 home, 20% down, 6.5% rate, 30-year fixed, 1.2% property tax, $300/month HOA, $150/month insurance, 1% maintenance, against renting an equivalent unit at $2,400/month with 3% annual rent increases and a 7% expected return on the would-be down payment:

• Year 5: buying ahead by about $4,000 (close to break-even)
• Year 10: buying ahead by about $35,000
• Year 20: buying ahead by about $180,000
• Year 30 (mortgage paid off): buying ahead by about $510,000 (you own the house outright vs renting at $5,400/month at year 30)

But change two assumptions, say, you put 10% down instead of 20% (PMI kicks in), and the home appreciates at 2% instead of 4%, and the break-even shifts to year 11-12. Most break-even analysis is sensitive to assumptions, so run it three times with conservative, base, and aggressive numbers before deciding.

Buying side closing costs typically run 2-5% of home price. On a $400,000 home that is $8,000-$20,000. Components: lender origination fee (0.5-1%), discount points (optional, prepay for a lower rate), appraisal ($500-700), home inspection ($400-600), title insurance ($1,500-3,000), escrow fees ($1,000-2,000), recording fees ($100-300), prepaid property tax (3-6 months held in escrow), prepaid homeowners insurance (1 year), HOA transfer fee (varies). On the seller side, the agent commission is 5-6% of sale price, traditionally split between seller's and buyer's agents.

These are unrecoverable. If you sell in year 3, you paid 2-5% to buy and 5-6% to sell — call it 8% of the home value gone in transaction friction. The home would need to appreciate 8% just to break even on the trade, plus enough more to cover the unrecoverable costs of ownership during those three years. In a flat market, selling within 5 years is almost always a financial loss.

PMI (private mortgage insurance) is a separate line for buyers putting less than 20% down. PMI runs 0.3-1.5% of loan balance per year, drops off automatically when the loan-to-value ratio reaches 78%, but in the meantime it is a monthly fee on top of P&I, property tax, and insurance. On a $360,000 loan (10% down on $400k), PMI at 0.7% is $210/month, a real chunk of payment that does not build equity.

Short time horizon. If you might move in 3-5 years (job, family situation, just wanting flexibility), the transaction costs and front-loaded interest of a mortgage almost certainly lose to renting and investing the difference. The math does not become favourable until year 5 in good markets and year 8-9 in expensive ones.

Expensive coastal metros. SF, NYC, LA, Boston, Seattle, DC all have rent-to-price ratios so out of whack that the 5% rule fails badly. Rents in these markets are sometimes half of what the unrecoverable cost of owning the same unit would be. People rent in expensive metros and buy elsewhere if they want a financial play.

High-volatility income. A mortgage commits you to a fixed monthly nut for 30 years. If your income comes from commission, equity comp that vests on schedule, or self-employment with seasonal swings, the inflexibility of mortgage debt is a real cost. Renting with a fat emergency fund and an index fund portfolio is the more liquid version of the same wealth-building plan.

Anti-correlation between job and home value. If you work in tech and the cyclical software downturn that takes your job also takes the local home values (which often happens, same macro shock), buying concentrates risk. Renting hedges by keeping you mobile.

Long time horizon. Plan to stay 10+ years and the break-even math flips. Equity builds, the mortgage payment becomes a smaller share of growing income, and the unrecoverable costs become a smaller share of accumulated equity.

Stable income, stable location. Federal employees, tenured academics, established professionals with strong employer commitment, dual-earner households with one spouse rooted locally, all situations where the next 10-15 years are predictable enough that buying captures the long-horizon advantage.

Inflation hedge thinking. A fixed-rate mortgage gets cheaper in real terms every year inflation runs. The same $2,200/month payment in year 1 is $1,650 in real terms by year 15 at 2% inflation, or $1,360 at 3% inflation. Renting has no equivalent, rent increases roughly with inflation.

Want to make changes. Painting, renovating, knocking out a wall, getting a dog of any size, planting a tree — these are easy as an owner and either impossible or expensive as a renter. The dollar value is debatable, but the quality-of-life value is real for some people and effectively zero for others.

Retirement planning. A paid-off house in retirement is functionally a 30-year prepaid lease on housing. The math compares well against renting in retirement when income is fixed and asset draw is the constraint.

After the 2022-2024 hike cycle peaked the 30-year fixed at over 8% in late 2023, rates settled into a range of 6.5-7% through most of 2024 and 2025. Early 2026 saw the first sustained dip below 6%, with conforming 30-year averages around 5.9-6.2% by April 2026 according to Freddie Mac's Primary Mortgage Market Survey. The Fed's pivot to gradual cuts pulled rates down but inflation expectations are keeping them sticky in the high 5s.

What this means in practice. On a $400,000 loan, the difference between 6.5% and 5.5% is about $260/month, or $93,000 over 30 years in interest. A $260/month difference is real but not transformative. The bigger story is the affordability ratio, at 6%+ rates, the same monthly payment buys 25-30% less house than it did at 3% rates in 2020-2021. Buyers are competing for smaller houses, not bigger ones.

Refinancing dynamics matter for buyers in 2026. Buying now at 6% with the option to refinance at 4.5% if rates drop later is not a bad bet, closing costs to refinance are typically $4,000-8,000, which break even quickly on a 1.5% rate drop. We have a separate post on the refinance decision in the related links.

Mortgage interest is tax-deductible up to $750,000 of home loan principal for joint filers (limit set by the 2017 TCJA, currently extended). State and local tax (SALT) deduction is capped at $10,000, which limits the property tax benefit in high-tax states. For most middle-income buyers in 2026, the standard deduction ($29,200 joint) is higher than what mortgage interest plus SALT can reach in early years, so the deduction is less valuable in practice than people assume.

On the sell side, the primary residence capital gains exclusion is $250,000 for single filers and $500,000 for joint, applicable if you owned and lived in the home for at least 2 of the last 5 years. This is a real benefit for long-term owners in appreciating markets, it shelters most or all of the gain from federal tax. State treatment varies.

These tax features tilt the math toward buying in high-bracket scenarios with long horizons, but they do not rescue a short-horizon buy in an expensive metro from losing on the underlying math.

All the math above is real, but it is not the only consideration. Stability and control matter. The certainty that you will not be told in 11 months that the landlord is selling the house has value to families with school-age children. The freedom to renovate matters to people who like their physical space to reflect their preferences. The discipline of forced savings via mortgage principal payment matters to people who would otherwise spend the difference rather than invest it.

Conversely, optionality has value. A renter can leave for a better job in 60 days. An owner cannot — at least not without absorbing transaction costs. Mobility, in industries and life stages where it matters, is a real asset.

Run the financial math with eyes open. Then add the qualitative factors with honest weights. The right answer is rarely the same for everybody.