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Rent vs Buy Calculator: Which Costs Less Over Your Stay?
Enter the home price, loan terms, ownership costs, expected rent and how long you will stay. The calculator compares the net cost of buying with the net cost of renting year by year.
The model behind the comparison
Rent versus buy is a question about cash flow over a specific stay, not a general verdict. The calculator adds up every dollar that leaves your pocket in each scenario and subtracts anything you still hold at the end.
- Buying: down payment, purchase costs, every mortgage payment, property tax, maintenance, insurance and fees. At the end, the sale price after selling costs, less the loan balance, comes back to you as equity.
- Renting: every rent payment, with the annual rent increase you enter. Because a renter keeps the down payment and purchase costs, those amounts are assumed to earn the investment return you choose, and the gain reduces the net cost of renting.
The lower net cost wins for that horizon. The table repeats the calculation for every shorter stay, which shows when buying overtakes renting, if it does.
Why the length of stay matters most
Buying carries large one-off costs: purchase fees at the start and selling costs at the end. Those costs are paid whether you stay two years or twenty, so they weigh heavily on short stays. Over longer stays, loan principal turns into equity and rent keeps rising, which tends to favour ownership if prices hold up. The break-even year in the results shows where the lines cross under your inputs.
Change the price growth to zero and then to a negative value. If your conclusion flips, the decision depends on the housing market more than on the monthly payments, and that is a risk to weigh against the flexibility of renting.
What the simplified model leaves out
Taxes differ so much between places that none are modelled; deductions or credits for homeowners, if they exist where you live, would favour buying. Property tax is held at the initial rate on the purchase price rather than reassessed each year. Maintenance is a flat share of the price although real repairs arrive in lumps. The model does not invest the monthly difference when one option has a lower outflow than the other, which can matter when owning is much cheaper or dearer per month. It also ignores personal factors: stability, freedom to move, and the effort of upkeep. Use the answer as one input, and see the mortgage calculator for the loan detail.
Choosing realistic inputs
Use rent for a home of similar size and location, not your current cheaper flat. Take the tax and insurance figures from listings or quotes. Keep the investment return modest and below your mortgage-rate-plus-risk expectations; a high assumed return makes renting look better, a low one favours buying. Running three scenarios (cautious, expected, optimistic) is more informative than a single run.
Worked example
A 400,000 home with 20% down at 6% over 30 years, compared with renting a similar home at 2,000 a month, over a ten-year stay.
Inputs
| Home price | 400000 |
|---|---|
| Down payment | 20 % of price |
| Mortgage interest rate | 6 % |
| Mortgage term | 30 years |
| Buying costs paid at purchase | 3 % of price |
| Property tax per year | 1 % of price |
| Maintenance per year | 1 % of price |
| Home insurance per year | 1200 |
| Association fees per month | 0 |
| Selling costs at the end | 6 % of sale price |
| Home price growth per year | 3 % |
| Monthly rent for a comparable home | 2000 |
| Rent increase per year | 3 % |
| Return if the upfront cash were invested | 5 % per year |
| How long you will stay | 10 years |
Result
Over 10 years under the assumptions entered.
| Net cost of buying | 176,709 |
|---|---|
| Net cost of renting | 217,275 |
| Monthly mortgage payment | 1,918.56 |
| Monthly tax, upkeep, insurance and fees | 766.67 |
| Cash needed at purchase | 92,000 |
| First year buying comes out ahead | Year 7 |
Cumulative net cost if you leave at the end of each year
| Stay length | Buying | Renting | Cheaper |
|---|---|---|---|
| Year 1 | 53,013 | 19,400 | Renting |
| Year 2 | 69,445 | 39,290 | Renting |
| Year 3 | 85,272 | 59,680 | Renting |
| Year 4 | 100,466 | 80,580 | Renting |
| Year 5 | 115,001 | 102,001 | Renting |
| Year 6 | 128,846 | 123,953 | Renting |
| Year 7 | 141,973 | 146,446 | Buying |
| Year 8 | 154,348 | 169,490 | Buying |
| Year 9 | 165,938 | 193,096 | Buying |
| Year 10 | 176,709 | 217,275 | Buying |
- Net cost of buying is every cash outflow minus what is left after selling and repaying the loan. Net cost of renting is rent paid minus the growth earned on the upfront cash if it were invested instead.
- Simplified model: it ignores tax effects, rent-versus-owner payment differences that could also be invested, and changes in home insurance or tax over time.
Financial disclaimer: Results are estimates for planning and education. They are not financial, tax or legal advice. Fees, taxes, rates and rules vary by lender, product and country, so confirm figures with your provider or a qualified adviser before making decisions.
Frequently asked questions
Is it cheaper to rent or buy?
It depends on the price, rent, interest rate, how long you stay and what happens to home prices. This calculator compares the net cost of both options for the stay you enter.
How long do I need to stay for buying to pay off?
The results show the first year in which buying has a lower net cost under your assumptions. It often takes several years because of purchase and selling costs.
Why does renting get an investment return?
A renter keeps the cash that a buyer would have put into the down payment and purchase costs. Counting a return on that cash makes the comparison fair.
Does the calculator include tax benefits?
No. Tax rules differ by country and change over time, so none are modelled. Check local rules if ownership gives you a deduction or credit.
Should I trust the break-even year exactly?
Treat it as a rough guide. Small changes in price growth, rent or interest rate can move it by several years.
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References and sources
- Consumer Financial Protection Bureau: educational guides on home buying and closing costs. Link
- Opportunity-cost comparison as taught in introductory personal finance texts.