How to Use the Buy vs Rent Comparison Tool
Deciding whether to buy a home or continue renting is one of the biggest financial decisions you will make. This tool compares the total cost of each option over the time you plan to stay in the home, factoring in upfront costs, monthly payments, and investment growth of savings.
Step-by-Step Instructions
- 1 Enter the home price and your planned down payment to set the purchase scenario. The tool subtracts the down payment to calculate your mortgage loan amount.
- 2 Input your expected mortgage rate and property tax rate. These determine your monthly payment as a homeowner.
- 3 Set the number of years you plan to stay in the home. This is critical because buying typically becomes cheaper than renting only after several years due to transaction costs.
- 4 Enter your expected home appreciation rate and the costs of buying and selling. Higher appreciation favors buying while higher transaction costs favor renting.
- 5 Set the monthly rent and expected annual rent increases to model the rental scenario. The tool assumes your rent goes up each year by the rate you specify.
- 6 Enter the expected return on invested savings. This represents what your upfront savings (the down payment and closing costs you avoided) could earn if invested instead of used for a home purchase.
Understanding the Inputs
Home Price
Home price is the total purchase price of the property you are considering buying. This is the single largest number in the calculation and directly drives your mortgage amount, property taxes, closing costs, and selling costs. A higher home price increases both the costs and the potential rewards of buying, since a larger asset appreciates by more in dollar terms even if the percentage appreciation rate stays the same. The home price also determines how much of a down payment you need, with 20 percent down being the typical threshold to avoid private mortgage insurance.
How to find it: Home prices are publicly available from real estate websites like Zillow, Redfin, and Realtor.com for specific properties. For a general comparison, use the median home price in your target area, which is reported by local real estate associations and the National Association of Realtors. If you are preapproved for a mortgage, your lender has already told you the maximum home price you qualify for, and you can use that figure.
Why it matters: The home price determines whether buying is financially feasible in the first place. A more expensive home requires a larger down payment and higher monthly payments, which extends the breakeven point where buying becomes cheaper than renting. In high cost areas where home prices are significantly above the national median, renting often remains cheaper even over long time horizons because the monthly mortgage payment is so much higher than rent.
Type: number · Default: 300000
Down Payment
Down payment is the amount of cash you pay upfront toward the home purchase. The remaining balance after the down payment becomes your mortgage loan amount. A larger down payment reduces your monthly payment, reduces the total interest you pay over the life of the loan, and may eliminate the need for private mortgage insurance if you put down at least 20 percent. However, a larger down payment also means more money tied up in the home that could have been invested elsewhere.
How to find it: Your available down payment comes from your savings, investments, gifts from family, or proceeds from selling a previous home. Conventional loans require as little as 3 percent down, while FHA loans require 3.5 percent and VA loans require zero down. Check with your lender to confirm the minimum down payment required for your loan type. Your actual down payment can be any amount above the minimum that you are comfortable committing.
Why it matters: The down payment is the largest upfront cost of buying and represents the opportunity cost of purchasing versus renting. When you rent, your down payment savings stay invested and earn returns over time. The Buy vs Rent comparison directly contrasts how that same down payment performs when it builds home equity versus when it grows in an investment portfolio. A smaller down payment makes renting more attractive because more of your money stays invested, while a larger down payment shifts the balance toward buying because more equity is at work.
Type: number · Default: 60000
Mortgage Rate (%)
Mortgage rate is the annual interest rate on your home loan. This rate determines how much of your monthly payment goes toward interest versus principal. A higher mortgage rate means more of your early payments go to interest, which slows your equity building and increases the total cost of the home. Mortgage rates fluctuate daily based on economic conditions, Federal Reserve policy, and the bond market, so the rate you can get depends on when you lock your loan.
How to find it: Current mortgage rates are published daily by lenders, mortgage brokers, and online rate comparison sites like Bankrate, NerdWallet, and Zillow. Your personal rate depends on your credit score, loan type, down payment size, and location. Check with at least three lenders to get personalized rate quotes. The rate you enter should be the best estimate of what you would actually qualify for, not the lowest advertised rate you see online.
Why it matters: The mortgage rate is the single biggest factor in determining your monthly payment and total interest over the loan term. When mortgage rates are high (7 percent or above), monthly payments are significantly larger, making renting relatively more attractive. When rates are low (4 percent or below), the cost of borrowing is cheap and buying becomes more favorable. The mortgage rate interacts with the expected investment return: if you can get a low mortgage rate and earn a higher return on investments, leveraging the mortgage to invest the difference can make buying even more advantageous.
Type: number · Default: 7
Property Tax Rate (%)
Property tax rate is the annual percentage of your home value that you pay in property taxes. Property taxes are levied by local governments including counties, school districts, and municipalities. They are typically paid as part of your monthly mortgage payment through an escrow account, so they directly increase your monthly housing cost. Property tax rates vary dramatically by location, from under 0.5 percent in some areas to over 2.5 percent in others.
How to find it: Property tax rates are set by your local county assessor and are publicly available on county government websites. Real estate listings often include the annual property tax amount for the specific property. Zillow and Redfin show estimated property taxes for each listing. Your mortgage lender will also provide an estimate of property taxes during the loan application process as part of your Loan Estimate document.
Why it matters: Property taxes are a recurring cost of homeownership that renters do not directly pay (landlords include them in rent, but the cost is shared across tenants). A high property tax rate adds hundreds of dollars to your monthly housing cost, which can significantly tilt the Buy vs Rent comparison toward renting. Over a seven year period, a 1 percent difference in property tax rate on a $300,000 home amounts to $21,000 in extra taxes paid.
Type: number · Default: 1.2
Years in Home
Years in home is the number of years you plan to live in the property before selling. This time horizon is critical because the upfront costs of buying (down payment, closing costs) are spread across the years you own the home. A longer time horizon makes buying more attractive because those upfront costs are amortized over more years and because you have more time for the home to appreciate. A shorter time horizon favors renting because transaction costs eat into any equity gain.
How to find it: Your planned years in the home depends on your personal circumstances: job stability, family plans, and how much you like the area. Real estate agents often recommend planning to stay at least five to seven years to recoup transaction costs. If you are unsure, use seven years as a reasonable middle ground for first time homebuyers. If you know you will relocate for work within a few years, use that specific timeframe.
Why it matters: The time horizon is the deciding factor in the Buy vs Rent decision. Transaction costs (closing costs at purchase typically 2 to 5 percent and selling costs typically 5 to 6 percent) mean that buying is almost always more expensive than renting in the short term. The breakeven point where buying becomes cheaper than renting is typically between three and five years depending on the specific numbers. If you plan to move before the breakeven point, renting is almost certainly the better financial choice.
Type: number · Default: 7
Annual Home Appreciation (%)
Annual home appreciation is the expected yearly increase in your home value. Over time, real estate has historically appreciated at a rate roughly in line with inflation, around 3 to 4 percent annually. However, local markets can deviate significantly from national averages. Home appreciation is the primary source of wealth building through homeownership because it increases your equity without requiring any additional payments.
How to find it: Historical home appreciation rates are published by the Federal Housing Finance Agency House Price Index, Case Shiller Index, and local real estate associations. For a conservative estimate, use 3 percent which approximates long term national averages. For an aggressive estimate in a growing market, you might use 5 percent. Zillow and Redfin provide forecast estimates for specific markets. Be conservative with this number because home appreciation is not guaranteed and past performance does not predict future results.
Why it matters: Home appreciation directly offsets the costs of homeownership by building equity that you realize when you sell. Higher appreciation makes buying more attractive because the home value growth supplements or exceeds the returns you could earn by investing your down payment instead. If home appreciation is expected to be low (below 2 percent annually), the investment return on your down payment savings while renting may outperform the equity gains from owning.
Type: number · Default: 3
Closing Costs (%)
Closing costs are the one time fees paid when you purchase a home. They include loan origination fees, appraisal fees, title insurance, attorney fees, recording fees, and prepaid property taxes and insurance. Closing costs are typically expressed as a percentage of the home price, usually ranging from 2 to 5 percent. These costs are paid out of pocket at closing and represent a significant upfront expense of buying that you do not recover unless the home appreciates enough.
How to find it: Your lender is required to provide a Loan Estimate within three business days of your mortgage application that itemizes all closing costs. For estimation purposes, use 3 percent of the home price as a typical figure for most conventional loans. FHA loans may have slightly lower closing costs while jumbo loans may have higher costs. Ask your lender for a Good Faith Estimate to get a precise number for your specific loan situation.
Why it matters: Closing costs are pure transaction friction that must be overcome by home appreciation and equity building before buying becomes financially beneficial. Higher closing costs increase the breakeven time horizon, making renting more attractive in the short term. When combined with selling costs, the total transaction cost of buying and selling a home (up to 10 percent of the home price) is one of the largest expenses in the comparison and the primary reason buying is not recommended for short term stays.
Type: number · Default: 3
Selling Costs (%)
Selling costs are the fees paid when you sell a home. By far the largest component is the real estate agent commission, which is typically 5 to 6 percent of the sale price, split between the buyer agent and seller agent. Other selling costs include transfer taxes, attorney fees, staging costs, and any repairs or concessions needed to close the sale. These costs are deducted from the sale proceeds and directly reduce your net gain from selling.
How to find it: Real estate agent commission rates are negotiable but traditionally range from 5 to 6 percent of the sale price. Discount brokerages may charge lower rates, while full service agents charge the standard rate. Transfer taxes vary by state and locality, ranging from 0.1 percent to over 2 percent in some states. Your real estate agent can provide an estimated net proceeds statement before you list your home that shows all expected selling costs.
Why it matters: Selling costs are the largest source of transaction friction in the Buy vs Rent calculation. Combined with closing costs, they can consume 8 to 10 percent of the home price, meaning your home must appreciate significantly just to break even on the round trip of buying and selling. This is why the Buy vs Rent comparison heavily favors renting for short time horizons and only shifts toward buying as the time horizon extends past the breakeven point.
Type: number · Default: 6
Monthly Rent
Monthly rent is the amount you pay each month to live in a rental property. This is the primary ongoing cost in the rental scenario and is compared directly against the monthly mortgage payment plus property taxes in the buying scenario. Rent payments build no equity, but they also come with no maintenance responsibility, no property tax liability, and no risk of property value decline.
How to find it: Current rental prices for comparable properties are available on rental websites like Zillow Rentals, Apartments.com, and Realtor.com. For a fair comparison, the rent should be for a property similar in size, location, and quality to the home you are considering buying. If you are currently renting, your actual rent is the best number to use. If you are comparing hypothetical scenarios, check rental listings in your target area for realistic figures.
Why it matters: Monthly rent is the baseline cost that buying must beat to make financial sense. If rent is low relative to the mortgage payment on a comparable home, renting is likely the better financial choice. The Buy vs Rent comparison accounts for rent increases over time, so even if rent starts lower, annual increases can make buying more attractive in later years. The ratio of monthly rent to home price (the price to rent ratio) is a common rule of thumb: a ratio below 15 typically favors buying while a ratio above 20 typically favors renting.
Type: number · Default: 2000
Security Deposit
Security deposit is the upfront payment made to the landlord when you start a rental lease. It is typically equal to one or two months rent and is held by the landlord as insurance against damage to the property or unpaid rent. The security deposit is usually refundable at the end of the lease minus any deductions for damages beyond normal wear and tear. Unlike a down payment on a home, the security deposit does not build equity and is returned to you when you move out.
How to find it: The security deposit amount is specified in your lease agreement. State laws often limit security deposits to one or two months rent. If you are currently renting, use the actual security deposit amount from your lease. If you are estimating for a future rental, use one months rent as a conservative estimate since many landlords require exactly one month. Some landlords may require a separate pet deposit in addition to the security deposit.
Why it matters: The security deposit is the upfront cost of renting, comparable to the down payment and closing costs of buying. However, the security deposit is much smaller and is returned to you, so its impact on the comparison is minimal compared to the tens of thousands of dollars tied up in a down payment. The key difference is that your security deposit does not grow in value: it stays flat while a home down payment potentially grows through appreciation.
Type: number · Default: 2000
Annual Rent Increase (%)
Annual rent increase is the percentage your rent goes up each year. Most leases include a provision for rent increases at renewal, typically ranging from 2 to 5 percent annually depending on the local rental market. Over a long time horizon, rent increases compound and can significantly raise your total housing cost. Rent control laws in some cities limit annual increases to a specific percentage, often tied to inflation.
How to find it: Your lease agreement specifies the terms for rent increases at renewal. In rent controlled cities like New York, San Francisco, and Los Angeles, annual increases are capped by local ordinance, typically between 2 and 5 percent. In markets without rent control, increases can be higher in competitive markets. Check your lease terms and local rental market trends. If you are estimating for a future rental, 3 percent is a reasonable national average for annual rent increases.
Why it matters: Rent increases are what make renting more expensive over time and create the long term advantage for buying. When you buy a home with a fixed rate mortgage, your principal and interest payment stays the same for 30 years while your rent goes up every year. Over a 10 year period, a 3 percent annual rent increase means your rent is 34 percent higher than when you started, while a fixed mortgage payment remains unchanged. This is the primary reason buying becomes cheaper than renting over longer time horizons.
Type: number · Default: 3
Return on Invested Savings (%)
Return on invested savings is the annual percentage return you expect to earn by investing the money you would have spent on a down payment and closing costs if you choose to rent instead. When you rent, you avoid the large upfront costs of buying and can invest that money in the stock market or other investments. This investment growth is the financial benefit of renting and is the direct competitor to home equity building through ownership. A higher investment return makes renting more attractive because your savings grow faster.
How to find it: Historical stock market returns averaged about 10 percent annually before inflation (7 percent after inflation) over the long term. A conservative estimate for a diversified portfolio is 6 to 7 percent. For a more aggressive stock heavy portfolio, use 8 to 9 percent. For a conservative estimate using bonds and CDs, use 3 to 5 percent. Your actual return depends on your investment allocation, fees, and timing. When comparing against home appreciation, remember that home appreciation is usually lower but less volatile than stock market returns.
Why it matters: The return on invested savings is the opportunity cost of buying a home. When you buy a home, your down payment stops earning investment returns and instead earns returns through home appreciation and reduced housing costs. The rent scenario frees up capital to invest, and the growth of that capital is the main financial benefit of renting. If investment returns are high relative to home appreciation and mortgage rates, renting and investing the difference can build more wealth than buying. This comparison is at the heart of the Buy vs Rent decision.
Type: number · Default: 7
Tips & Best Practices
- ✓ The breakeven point is typically 3-5 years. Buying is usually more expensive than renting for the first few years in a home.
- ✓ If you plan to move within 3 years, renting is almost always the better financial choice due to transaction costs.
- ✓ A larger down payment reduces monthly payments but increases the opportunity cost of not investing that money.
- ✓ Consider maintenance costs (1-2% of home value annually) which are not explicitly modeled but should be factored into your decision.
- ✓ Property taxes and mortgage interest may be tax deductible on Schedule A if you itemize, adding a potential tax benefit to buying.
- ✓ Home appreciation is not guaranteed. Treat it as a range and run multiple scenarios with different appreciation rates.
- ✓ The rule of thumb: if annual rent is more than 5% of the home price, buying typically wins. If less than 4%, renting typically wins.
by CalculatorPro Tools · Updated 2026-07-29