Rent vs. Buy: How to Decide Whether Buying a Home Is Worth It

Q: What is the 5% rule for renting vs. buying?

The 5% rule says the unrecoverable costs of owning a home run about 5% of its value per year: roughly 1% property tax, 1% maintenance, and 3% cost of capital (mortgage interest plus the opportunity cost of your down payment). If a home's annual rent is less than 5% of its purchase price, renting is usually cheaper; if it's more, buying usually wins. It's a quick filter, not a final answer.

Q: What is a good price-to-rent ratio?

Divide the home price by the annual rent. A ratio below 15 generally favors buying, above 20 generally favors renting, and 15 to 20 is a gray zone where you should run the full numbers. For example, a $450,000 home rented at $2,200 a month has a ratio of about 17 — squarely in the gray zone.

Q: How long do I need to stay for buying to beat renting?

It depends on your market and assumptions, but transaction costs alone (about 2% to buy and 6% to sell) punish short stays. In a typical worked example — $450,000 home, $2,200 rent rising 3% a year — buying doesn't pull ahead until around year 13. As a rule of thumb, if you might move within 5 years, renting is usually the better financial choice.

Q: Is a bigger down payment always better?

Not necessarily. A bigger down payment shrinks your loan and avoids PMI, but that cash could otherwise be invested — $99,000 earning 7% for 7 years grows by about $60,000. That's the opportunity cost of your down payment, and it's one of the largest hidden costs of buying. Run both scenarios in a rent vs. buy calculator before deciding.

Should you keep renting or buy a home? It's the biggest financial question most households face — and the honest answer is "it depends on the numbers." Here are the two rules of thumb, the three costs buyers always forget, and a full worked example you can check yourself.

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The short answer: two quick rules

If you want a 60-second gut check, run these two:

The 5% rule: if a home's annual rent is less than 5% of its purchase price, renting is probably cheaper. If it's more, buying probably wins.
The price-to-rent ratio: home price ÷ annual rent. Below 15 favors buying, above 20 favors renting, 15–20 is a gray zone.

Take a $450,000 home renting for $2,200 a month: 5% of the price is $22,500 a year ($1,875/month) — rent is above that, which leans toward buying. But the price-to-rent ratio is 450,000 ÷ 26,400 ≈ 17 — gray zone. When the quick rules disagree, run the full math in the rent vs. buy calculator.

The 5% rule, explained

Rent is 100% unrecoverable — you never see it again. Owning has unrecoverable costs too, and they run about 5% of the home's value per year:

~1% property tax
~1% maintenance and repairs
~3% cost of capital — the mortgage interest plus the return your down payment could have earned invested elsewhere

So compare annual rent against 5% of the price. On a $450,000 home that's $22,500 a year, or $1,875 a month. Paying $2,200 in rent? Owning starts to look attractive — before transaction costs, appreciation, and how long you'll stay, which the rule ignores. It's a filter, not a verdict.

Price-to-rent ratio, explained

Simpler still: price ÷ (monthly rent × 12). A low ratio means homes are cheap relative to rents (buy), a high ratio means rents are cheap relative to homes (rent). The usual bands are under 15 → buy, over 20 → rent. Our example lands at 17.0 — close enough to either side that the details decide. That's exactly what the rent vs. buy calculator is for: plug in your market's actual numbers instead of national rules of thumb.

The three costs buyers forget

1. The opportunity cost of the down payment. A $90,000 down payment plus ~$9,000 in closing costs is $99,000 that isn't invested. At a 7% return, that's about $59,972 of foregone growth over 7 years — often the single biggest hidden cost of buying, and one renters never pay.

2. Transaction costs. Expect ~2% of the price to buy (closing costs) and ~6% to sell (agent commissions and fees). On our example that's roughly $9,000 in and over $33,000 out. These are pure friction: they punish short stays and are why buying rarely wins if you move in under 5 years.

3. Maintenance. Budget 1% of the home's value per year — $375 a month on a $450,000 home. Roofs, HVAC, plumbing: it's real spending, not equity. Renters outsource all of it to the landlord.

Worked example: $450,000 home vs. $2,200 rent

Assumptions, all stated up front: 20% down ($90,000), so a $360,000 loan at 6.75% fixed for 30 years. Property tax 1.1% of value per year; homeowners insurance $1,800 per year; maintenance 1% per year. Rent starts at $2,200/month and rises 3% a year; the home appreciates 3% a year; invested cash earns 7%; selling costs 6%. Horizon: 7 years, then sell.

Monthly cost of owning:

Principal & interest: $2,334.95 / month
Property tax: $412.50 / month
Homeowners insurance: $150.00 / month
Maintenance: $375.00 / month
All-in: $3,272.45 / month

Seven years of renting: $202,289 in total rent paid (it rises 3% a year). But the $99,000 never spent on a down payment and closing costs grows by about $59,972 at 7% — so the net cost of renting is about $142,317.

Seven years of buying, then selling: $373,886 cash out the door ($99,000 upfront + 84 monthly payments of $3,272.45). The home is worth about $553,443; after 6% selling costs and repaying the $326,835 remaining balance, you walk away with about $193,402 in equity. Net cost of buying: about $180,484.

Verdict: renting wins by roughly $38,000 over 7 years under these assumptions. The killers: $162,971 of the mortgage payments was pure interest (only $33,165 went to principal), and buying + selling friction ate over $42,000. Change the assumptions — faster appreciation, slower rent growth, a longer stay — and the answer flips. Run your own numbers before you decide.

How long you stay changes everything

In the example above, buying doesn't pull ahead until about year 13. Two forces drive that: early mortgage payments are mostly interest (in month one, $2,025 of the $2,334.95 payment is interest — money you'll never see again), while rents keep compounding upward and your P&I payment stays frozen. Time converts the mortgage from an expense into forced savings.

The practical rule: if you might move within 5 years, renting is usually the better financial call — transaction costs alone will eat any equity you build. Planning to stay 10+ years? Buying usually wins, especially if rents in your area rise faster than home prices. When in doubt, model your actual timeline in the rent vs. buy calculator rather than trusting a national average.

FAQ

What is the 5% rule for renting vs. buying?

It compares annual rent to 5% of the home's price — roughly 1% property tax + 1% maintenance + 3% cost of capital. Rent below that line favors renting; above it favors buying. It's a quick filter: always confirm with a full calculation in our rent vs. buy calculator.

What is a good price-to-rent ratio?

Below 15 generally favors buying, above 20 favors renting, and 15–20 is a gray zone. A $450,000 home at $2,200/month rent gives a ratio of about 17 — gray zone, so the details (how long you'll stay, local taxes, your down payment) decide.

How long do I need to stay for buying to beat renting?

It depends, but transaction costs of ~2% to buy and ~6% to sell punish short stays. In our worked example buying pulls ahead around year 13. If you might move within 5 years, renting is usually the better financial choice.

Is a bigger down payment always better?

Not necessarily. It shrinks your loan and avoids PMI, but the cash could otherwise be invested — $99,000 at 7% grows by about $60,000 over 7 years. Weigh that opportunity cost with the rent vs. buy calculator before locking up the cash.