Renting or buying: compare the whole picture

The short answer

Neither is always better. Buying tends to win the longer you stay; renting tends to win when you may move within a few years.

What each payment buys

Rent buys a place to live and flexibility. The landlord pays for the roof, the water heater and the property tax, and you can leave at the end of a lease.

A mortgage payment buys the same shelter plus a growing ownership stake. Only the principal portion builds that stake. Interest, property tax, insurance and upkeep are costs, in the same way rent is a cost. In the early years of a loan most of each payment is interest.

Why time decides it

Buying has large one-time costs at both ends: closing costs when you buy, and commissions, fees and transfer tax when you sell. Together they can run 7% to 9% of the home's price. Over two or three years there is little time for principal paydown and any price growth to cover that. Over ten years there usually is.

A Bay Area example

Renting at $3,400 a month, rising 3% a year, compared with buying a $900,000 home with 20% down at a sample 6.5% rate. The buyer's figure is every dollar spent, minus the equity they walk away with after selling.

Stay 3 years	rent $126,109, buy $203,737
Stay 7 years	rent $312,628, buy $360,496
Stay 12 years	rent $579,035, buy $530,429
Buying pulls ahead after	about 10 years

Change one assumption and the answer moves. If the home's value stays flat instead of rising 3% a year, buying costs $549,007 over seven years against $312,628 for renting. That is why it pays to test more than one future.

This comparison leaves out income taxes and what a down payment might earn if invested instead. Run your own numbers in the rent vs. buy calculator.

Two California rules that shape the comparison

Owners: Proposition 13. While you own a home, its assessed value for property tax can rise by no more than 2% a year. Combined with a fixed-rate loan, most of an owner's housing cost is predictable for decades.
Renters: the statewide rent cap. Under California's Tenant Protection Act (AB 1482), yearly increases on many rentals are limited to 5% plus local inflation, and never more than 10%. Newer buildings and many single-family homes owned by individuals are exempt, and some cities have stricter local rules. Check which rules cover your unit.

What the numbers leave out

Flexibility. A renter can follow a job to another city in weeks. An owner has to sell or become a landlord.
Control. An owner can renovate, keep pets and stay as long as they like. A renter depends on the lease and the landlord's plans.
Effort. Owning takes time and attention that renting does not.
Taxes. Federal law lets owners who itemize deduct mortgage interest on up to $750,000 of home loans, along with some state and local taxes. Many households take the standard deduction and see no benefit, so do not count on it without checking with a tax professional.

Mistakes to avoid

Believing rent is "throwing money away." Interest, taxes and upkeep are also money you do not get back.
Comparing rent with the loan payment alone instead of the full monthly cost.
Assuming prices only rise. Test a flat and a falling case.
Forgetting selling costs when you picture your future equity.

Questions to ask

How sure am I that I will stay in this area for at least five to seven years?
If I bought and had to move in two years, could I afford to sell at a loss or rent the home out?
What would the same monthly amount get me as a renter versus as an owner in the neighborhoods I like?

What to remember

The length of your stay matters more than any other input.
Compare full costs on both sides, including buying and selling costs.
Renting while you build savings is a sound plan, not a failure.

Compare complete costs over several possible timelines, including a move sooner than you expect.

Sources and further reading