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The monthly mortgage payment comes from the standard amortization formula. Rent is projected year by year with your annual rent-growth rate. Buying cost is the down payment plus 2% closing costs plus every mortgage payment made, minus your equity - the appreciated home value less the remaining loan balance. The break-even year is the first year the cumulative buying cost drops below the cumulative renting cost, searched up to the loan term. Results are estimates for planning, not professional financial advice.
The calculator compares two cumulative totals over the years you plan to stay.
Renting side: each year's rent grows by your rent-growth rate, so total_renting = sum of monthly_rent × 12 × (1 + g)⁽year-1) for every year.
Buying side: the monthly payment comes from the standard amortization formula, M = P*r*(1+r)ⁿ/((1+r)ⁿ - 1), where P is the loan amount (price minus down payment), r the monthly rate and n the number of payments. Total buying cost = down payment + closing costs (2% of the price) + all monthly payments made - equity, where equity = appreciated home value - remaining loan balance.
The net difference is total_renting - total_buying: positive means buying was cheaper overall, negative means renting was. The break-even year is the first year the cumulative buying cost drops below the cumulative renting cost, searched year by year up to the loan term.
Worked example - $600,000 home, 20% down ($120,000), 8% 30-year mortgage, $1,500/month rent growing 3% a year, 2% appreciation, 10-year stay: the loan is $480,000, so M = 480,000 × 0.006667 × (1.006667)³⁶⁰ / ((1.006667)³⁶⁰ - 1) = $3,522.07/month. Total renting over 10 years = $206,349.83; total buying = $244,330.32. Renting wins by $37,980.49, and buying does not break even until year 15.
Start with the currency selector so every money figure shows in your own currency. Enter the home price and your down payment as a percentage, then the mortgage rate and loan term. For the renting side, enter the monthly rent of a comparable home and how fast you expect rent to rise each year. Add your expected home appreciation rate and how many years you plan to stay.
The results show your monthly mortgage payment, the total cost of each path over your stay, the net difference, and your break-even year. The donut chart splits the loan into principal (the home price) versus total interest, so you can see how much of your payments goes to the bank over the full loan term.
The most common mistake is comparing the rent check to the mortgage payment and calling it a decision. It ignores two large forces. First, part of every mortgage payment is principal - money that becomes your equity, not the bank's. Comparing rent to the full payment treats your own savings as a cost. Second, the renter's down payment money is not sitting idle: invested, it grows, and that growth offsets rent.
The honest comparison is net cost on both sides: for buying, the unrecoverable costs (interest, closing costs) minus equity gained; for renting, total rent paid. That is what this calculator computes, year by year.
The break-even year is the first year the cumulative cost of buying drops below the cumulative cost of renting - the point where owning starts to pay off. Early on, buying is weighed down by closing costs and by mortgage payments that are mostly interest. Over time, principal paydown and appreciation build equity while rent keeps rising, and the lines cross.
The search runs year by year up to your loan term. If buying never becomes cheaper within the loan term, the calculator reports no break-even instead of inventing one. The longer you stay, the more the math favors buying; short stays almost always favor renting because the upfront costs never get repaid. In short, it tells you when buying a house pays off for your numbers.
Before running the full comparison, one ratio gives you the shape of the answer: home price divided by annual rent. Under 15, buying usually wins for anyone staying a few years. Between 15 and 20 is the judgment zone, where your assumptions about rates and appreciation decide. Above 20, renting usually wins unless you stay a long time or appreciation runs hot.
The worked example above sits at 600,000 / (1,500 × 12) = 33.3 - deep in renting territory, which is exactly why its break-even lands in year 15. Use the ratio for a quick read, then let the calculator do the real work with your actual numbers.
A widely used rule of thumb: if you plan to stay fewer than 5 years, renting usually wins. The reason is transaction friction: roughly 2% to get into a home in closing costs, plus selling costs on exit, which need years of appreciation and principal paydown to overcome. Two years of mortgage payments barely dent the loan balance, while the round-trip costs are already sunk.
If your job might move you within a few years, run the calculator at the shorter horizon. When plans are uncertain, the renter's flexibility has real value that no formula captures.
To stay transparent, here is exactly what the model does and does not include. Included: the standard amortizing mortgage payment, yearly rent growth, home appreciation, 2% buying closing costs, and the equity credit (appreciated value minus remaining balance). Left out: property taxes, homeowner's insurance, maintenance and repairs, HOA fees, PMI, mortgage-interest tax deductions, the investment return your down payment could have earned, and inflation.
Growth rates are assumed smooth and constant, though real markets bounce around. Because of these simplifications, treat the output as estimates for planning, not professional financial advice. Test optimistic and pessimistic assumptions before making a housing decision.
It compares the total cost of both paths over the same number of years. The renting side adds up rent, grown yearly by your rent-growth rate. The buying side adds the down payment, closing costs and all mortgage payments, then subtracts the equity you keep (the appreciated home value minus the remaining loan balance). The difference tells you which path cost less, and the break-even year tells you when buying starts to pay off.
It depends on the market, the mortgage rate and how long you stay, but buyers commonly break even after 3 to 7 years. High rates, low appreciation and short stays push it later; cheap borrowing and long stays pull it earlier. The calculator finds your exact break-even year from your own numbers instead of a rule of thumb.
No. Rent buys you housing plus freedom from maintenance bills, property taxes and market risk, and the money you do not sink into a down payment can be invested and grow. Renting is only 'throwing money away' if buying would have built more wealth in the same period, which is exactly what this calculator tests.
The home's purchase price divided by one year of rent for a comparable home. A ratio under 15 generally favors buying, 15 to 20 is the judgment zone where assumptions decide, and over 20 favors renting. For example, a $600,000 home against $1,500/month rent gives 600,000 / 18,000 = 33.3, which strongly favors renting.
The rule of thumb that you should plan to stay at least 5 years for buying to make financial sense. Closing costs to buy (around 2% here) plus selling costs on exit need years of appreciation and principal paydown to overcome. Move sooner, and the transaction costs usually wipe out any gain.
This model includes mortgage interest (inside every payment) and 2% buying closing costs, offset by the equity you build. It deliberately leaves out property taxes, insurance, maintenance, HOA fees, PMI and tax deductions to keep the formula simple and transparent. If those are large in your market, buying is somewhat more expensive than the result shows.
Run the calculator at the shorter horizon - under 3 to 5 years, renting usually wins because closing costs and early interest-heavy payments never get repaid. If your plans are uncertain, remember the renter's flexibility has genuine value: moving for a better job with 30 days' notice is worth something no formula prices in.
No. It is an educational estimating tool: the outputs are only as good as your assumptions about future rates, rents and home values, and the model leaves out taxes, maintenance and investment returns. Use it for planning and for comparing scenarios, then talk to a qualified professional before making a housing decision.
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