Money explained
Rent or Buy? How Long You Have to Stay Before Buying Wins
7 min read · Updated September 26, 2026 · by the SolveCalcPro editorial team
- Buying has big upfront and exit costs, so the length of your stay matters more than the monthly payment.
- The renter’s advantage comes from investing the down payment and the monthly difference.
- Rent level and home-price growth move the break-even year more than almost anything else.
- A model is a stress test, not a prediction: change one input at a time.
“Rent is throwing money away” and “buying is a trap” are both slogans. The honest answer is a number: the year at which the buyer’s net worth overtakes the renter’s. For the base case below that is year 11. Here is how that number is built and what changes it.
Comparing like with like
The usual mistake is to compare a mortgage payment with rent. They are different things. A buyer pays the mortgage (part interest, part principal), property tax, insurance and maintenance, plus closing costs up front and agent and closing fees when selling. The renter pays rent and nothing else — but also keeps the down payment and closing costs, which can be invested.
So the fair comparison is net worth at the end of a chosen horizon. The buyer’s net worth is the home’s value, less selling costs, less the remaining loan. The renter’s is an investment pot that started with the buyer’s down payment and grew by the return plus any monthly saving (when owning costs more than rent). This is exactly what the rent vs buy calculator does.
The base case
Take a $400,000 home with 20% down, a 6.5% 30-year mortgage, 1.1% property tax, $1,500 insurance, 1% a year for maintenance, 3% annual price growth, 3% closing costs and 6% selling costs. Comparable rent is $2,200 and rises 3% a year; the renter earns 6% on invested savings.
The calculator’s verdict at the ten-year mark: after 10 years, renting leaves you better off by $4,204.29. The break-even is year 11. The chart shows why: early on, closing costs, interest and selling costs weigh on the buyer; later, principal repayment and price growth catch up.
Why time horizon dominates
Selling costs of about 6% on a $400,000 home are $24,000, plus roughly $12,000 of closing costs at the start. Those $36,000 need years of equity growth to recover. That is why moving after two or three years usually favours renting even when the monthly numbers look similar, and why the break-even year in the chart is so far to the right.
If you might move for a job, a growing family or a change of heart within five years, treat buying as a bet that prices rise enough to cover the friction — a bet many people lose in flat markets.
What moves the break-even year
Hold everything else equal and vary the rent you would pay for a comparable home:
| Starting monthly rent | Break-even |
|---|---|
| $1,500 | Not within 30 years |
| $1,800 | Not within 30 years |
| $2,200 | Year 11 |
| $2,800 | Year 4 |
| $3,500 | Year 2 |
When rent is high relative to price, owning pulls ahead sooner; when rent is low, renting and investing the difference can win for decades. Now vary price growth with rent at $2,200:
| Annual home-price growth | Break-even |
|---|---|
| 0% | Year 28 |
| 2% | Year 20 |
| 3% | Year 11 |
| 5% | Year 4 |
Prices are the great unknown. A model that only works at 5% growth is fragile; one that works at 0–2% is robust.
What the model leaves out
- Tax: mortgage-interest and property-tax deductions depend on your situation and on itemising; they would favour buying. The IRS explains the rules for home mortgage interest.
- Behaviour: renters who do not actually invest the difference lose the model’s advantage; owners are forced to save through principal repayment.
- Life: stability, space and the freedom to renovate have value that no spreadsheet captures — and so do flexibility and not owning repairs.
A simple decision rule
Run three scenarios — cautious (0–2% price growth, higher rent growth), expected, optimistic — for the length of time you realistically expect to stay. If buying wins in the cautious case, it is likely a good decision. If it only wins in the optimistic case, you are speculating. Then check affordability with the home affordability calculator so the payment does not squeeze everything else.
Frequently asked questions
How long should I stay in a house for buying to make sense?
Often five to seven years or more, because buying and selling costs have to be spread over time. The calculator’s break-even year shows it for your inputs.
Is renting really “throwing money away”?
Rent buys housing, just as interest, tax and upkeep do for owners. What matters is what each path leaves you with after the horizon you care about.
Does the model include tax deductions?
No. Deductions vary with your tax position and would tilt results towards buying.
Which assumption matters most?
Time horizon, rent relative to price and home-price growth. Test each one at a time.
Sources and further reading
Try the tools
Rent vs Buy CalculatorCompare the long-term net worth of buying a home against renting and investing the difference, with a break-even year.Home Affordability CalculatorEstimate the home price you can afford from income, debts, down payment and rate using lender debt-to-income ratios.Mortgage CalculatorEstimate a monthly mortgage payment, total interest and total cost.Learn the method
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