The 5% rule was formalized by financial planner Ben Felix and provides a rapid sanity check:

The math: multiply the home price by 5%, then divide by 12. This represents the unrecoverable annual cost of ownership as a monthly figure — the cost of owning that you'd lose even if the home appreciated perfectly.

The 5% is composed of: ~1% property tax (on average nationally), ~0.5% maintenance cost, ~3.5% cost of capital (what you could earn on the down payment and equity if invested, net of the mortgage rate tax deduction for some buyers).

Example: $350,000 home × 5% = $17,500 / 12 = $1,458/month in unrecoverable ownership costs. If you can rent a comparable home for under $1,458/month, renting is likely cheaper. If you're paying $2,000+ in rent for a comparable property, buying is likely the better financial choice.

The limitation: the 5% rule ignores appreciation (which benefits buyers) and rent inflation (which penalizes renters who stay long-term). It is a starting point, not a complete model.

At current market rents vs home prices in most Florida metros: the 5% test typically favors buying in inland and suburban markets; in ultra-premium coastal markets it is closer to neutral.

Buying a home has significant transaction costs at both ends: closing costs of 2-4% of the purchase price to buy, and 5-7% of the sale price in agent commissions and fees to sell. This creates a break-even period — the minimum time you must own before total ownership costs fall below the equivalent rental cost.

Typical break-even: 3-5 years in most U.S. markets at current rates and prices. Below 3 years of planned ownership: renting is almost always the financially superior choice. Above 5 years: buying almost always wins, compounding across equity accumulation, rent inflation absorbed, and eventual mortgage payoff.

What shortens the break-even: home price appreciation (increases equity faster); rent inflation (raises the alternative cost faster); large down payment (reduces mortgage interest cost); and markets with low closing costs.

What lengthens it: high purchase price relative to rent; high interest rates; short stay; and high transaction cost markets (attorney-state closings, high transfer taxes in some counties).

The break-even calculation your agent or lender should run before you decide: what is the total cost of buying, owning for your expected period, and selling vs the cost of renting for the same period? These numbers, run specifically for your market and price point, are the definitive answer.

Renting is the financially superior choice when:

• Your stay horizon is under 3 years: the transaction costs of buying and selling within 3 years almost never recover through appreciation. Military PCS, corporate relocations, and known life changes (graduate school, job transition) all favor renting for the short-term.

• Your rent is significantly below the 5% rule equivalent: rent-controlled apartments in some markets, legacy tenant situations, or markets with extreme price-to-rent ratios (some Manhattan zip codes, some San Francisco neighborhoods) can make long-term renting financially competitive even over a 10-year horizon.

• Your income or employment is in transition: lenders require 2 years of stable employment history. A recent job change, recent self-employment, or anticipated career interruption can make qualifying difficult and the stress of homeownership poorly timed.

• You have specific financial milestones pending: paying off high-interest debt, reaching a target down payment that eliminates PMI, or resolving a credit event that's currently limiting your rate — these are legitimate reasons to rent for 6-18 months while the underlying financial picture improves.

Renting because you think home prices will fall is almost never the right reason. Price corrections severe enough to benefit a disciplined waiter are both rare and unpredictable, and the cost of the wait (rent paid) erodes most of the potential benefit.