Interactive real estate analysis

Rent vs. Buy Calculator

Compare ownership equity with renting and investing the difference.

What renting versus buying measures

A fair comparison tracks two possible financial paths over the same period. Buying builds equity while incurring ownership costs; renting may leave cash available to invest. The result depends heavily on the chosen assumptions.

How to Use This Calculator

Use comparable housing and the same time horizon.
Include transaction costs, maintenance, taxes, insurance and expected rent increases.
Enter an investment return assumption and test alternative appreciation rates.

Run Your Numbers

Enter your assumptions below. The calculator provides educational estimates; confirm inputs for your property and financing.

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Understand the numbers

Formulas and Assumptions

This guide explains the core calculation methods. The widget’s detailed assumptions and schedules govern its displayed results.

Home value after t years = starting value × (1 + annual appreciation)^t
Net owner equity at sale = home value − mortgage balance − selling costs
Renter investment balance evolves from starting investments + investment returns + invested monthly savings
Net-worth difference = owner net worth − renter net worth

How to Interpret the Results

Compare the same time horizon and cash budget. Include down payment opportunity cost, closing costs, taxes, insurance, maintenance, rent increases and investment returns. Break-even is the first modeled year when buying overtakes renting under the selected assumptions; it may never occur.

Use consistent time periods and enter percentages in the format requested by each field. Test conservative assumptions as well as your expected case. Estimates are not a lending commitment or individualized financial, legal or tax advice.

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Detailed calculator guide

Detailed Methodology and Model Assumptions

How the Two Wealth Paths Are Built

The owner’s net worth includes sale value after selling costs, less the mortgage balance, plus any invested savings. The renter starts with the cash that would have gone toward down payment and closing, then adds invested cost differences.

Each year the model applies investment returns and contributions. Home-linked taxes and maintenance follow assumed home value; other expenses follow their specified growth assumptions. Principal repayment belongs in equity, so avoid subtracting it again as if it were a permanently lost expense.

Durable Break-Even and Model Limits

The tool identifies a break-even year that remains favorable in later modeled years, rather than treating a single temporary crossover as decisive. Changing investment returns, transaction costs or appreciation can change that date.

The comparison simplifies tax effects and some small recurring or moving expenses. If one housing option has materially different insurance, utilities, travel costs or quality, add those to your own comparison. Financial net worth also does not measure the value of flexibility or housing stability.

Worked Example

Hypothetical illustration: these figures are separate from the live calculator inputs.

If a renter retains $50,000 that would otherwise go toward buying and earns a hypothetical 5% annually, that investment becomes about $63,814 after five years before tax and fees, even without further contributions. Compare that with the owner’s sale proceeds after the mortgage payoff and selling costs, while also tracking differences in monthly spending.

When does buying break even?

Break-even is specific to the modeled holding period, transaction costs and investment assumptions. It can move substantially or disappear when appreciation or maintenance changes.

Rules of Thumb, and Their Limits

Do not compare the mortgage payment alone with rent. Buying and selling have costs, and a down payment has an opportunity cost. Investment and property returns are uncertain.

Frequently Asked Questions

Does renting mean throwing money away?

Rent pays for housing and flexibility. The financial comparison depends on the complete costs and what happens to cash not used for ownership.

Is there always a break-even year?

No. Some assumptions favor one option throughout the modeled period.

Massachusetts and Property-Specific Considerations

Use the municipality’s actual assessed taxes and the property’s current insurance and association costs. Local rent evidence, building condition and the transaction’s legal use matter more than a statewide average. Review current lender or tax requirements where applicable.

Explore Massachusetts investment guides · Use the due diligence checklists · Compare other calculators

Opportunity Cost of Upfront Cash

Hypothetical comparison
Assumed annual investment return	Value of $50,000 after five years
0%	$50,000
3%	$57,964
5%	$63,814
7%	$70,128

No contributions, withdrawals, taxes or fees are included. These are hypothetical returns, not forecasts. Compare this retained cash with the buyer’s equity after sale costs and loan payoff; also track the difference in ongoing housing expenses.

Use the Comparison in Your Decision

Change one assumption at a time in the calculator, record the result and compare it with your base case. Then combine adverse assumptions to see whether the plan still fits your cash reserves and objectives. A useful scenario explains what must remain true for the transaction to work.