Rent Vs Buy Calculator
Compare the true unrecoverable cost of renting against owning over a defined holding period, including the investment return on the deposit you would not have spent.
Rent Vs Buy Calculator
Results recalculate instantly on every keystroke. Nothing you type is transmitted.
What this result does not account for
- Results are a model, not a quotation — an institution's own figures govern.
- Every input is an assumption; change one and the answer changes with it.
- Rounding is applied only at the display layer, so totals may differ by a cent from a statement that rounds each line.
In short: Buying beats renting only when appreciation and principal reduction outweigh interest, tax, maintenance and transaction costs — plus the return the deposit would have earned invested. Over 7 years on a $420,000 home against $2,200 rent, buying costs $126,530.51 versus $253,174.65.
Formula
costrent = rent paid + return forgone on the deposit
Only unrecoverable cost is compared. Principal repayment is excluded from both sides because it converts cash into equity rather than consuming it.
Worked Example
- Interest over 7 years. $146,193.46 on the $336,000 loan.
- Add carrying costs. Tax $32,340.00, insurance $12,600.00, maintenance $29,400.00.
- Add exit costs, deduct gain. Selling $38,688.39, less $132,691.35 of appreciation.
- Total buying. $126,530.51 unrecoverable.
- Total renting. $202,289.00 of rent plus $50,885.64 of forgone return = $253,174.65.
Analyst note. The result is extremely sensitive to the appreciation assumption. At 4% nominal growth buying wins by $126,644; set appreciation to 0% and that margin collapses to about $3,241. Treat any single result as one scenario, not a forecast.
Strengths & Limits Of This Model
Where this engine is strong
- Runs entirely in your browser — no figure you type is transmitted or stored.
- Shows the full working, so every number can be traced and challenged.
- Free, unmetered and free of affiliate incentives.
Where it stops
- Generalised assumptions cannot capture every individual circumstance.
- Jurisdiction-specific rules and mid-year changes may not be reflected.
- A model output is not a substitute for a professional review of your position.
Practical Use Cases
Deciding whether a short stay justifies buying
Transaction costs of 6 to 10% round-trip need years of appreciation to absorb. Set the holding period to three years and the verdict frequently flips, which is the single most useful test this tool performs.
Pricing the opportunity cost properly
Informal comparisons ignore that the deposit would have been invested. At 7% over seven years, $84,000 forgoes $50,885.64 of return. Cross-check the affordability side with the Mortgage Affordability Calculator.
Stress-testing an optimistic market view
Run the comparison at 0% and at negative appreciation. A purchase that only works on aggressive growth assumptions is a leveraged bet on the market, not a housing decision. Check the payment with the Mortgage Payment Calculator.
Methodology & Editorial Standards
The comparison is built on unrecoverable cost, which is the only economically valid basis. Principal repayment is excluded from the buying side because it converts cash into equity rather than consuming it. Buying costs comprise mortgage interest accrued over the holding period, property tax at 1.1% of price annually, insurance, maintenance at the standard 1% of value annually, and selling costs at 7% of the exit value, less nominal appreciation captured. Renting costs comprise rent grown annually at the specified rate, plus the compounded investment return the deposit would have earned had it not been spent. Tax treatment of mortgage interest and capital gains is not modelled, as it varies by jurisdiction and by whether the filer itemises. The engine implements the standard published formula for this calculation. Inputs are validated for domain and sign before evaluation, and any undefined case returns an em-dash rather than a spurious value.
Computation runs in IEEE-754 double precision at full internal precision; rounding to two decimal places occurs strictly at the display layer, so no cumulative drift enters the result. All monetary outputs use accounting presentation — grouped thousands, two decimals, negatives in parentheses — so figures can be transcribed directly into a model or working paper. Division-by-zero and out-of-domain inputs return an em-dash rather than a misleading number.
This engine was reconciled against an independent reference implementation and hand-verified for the worked example above before release. Our full five-stage review process is published on the About Us page.
Disclaimer. This calculator is provided for informational and modelling purposes only and does not constitute financial, tax, legal, medical, or engineering advice. Verify all figures with a qualified professional before acting on them.
Rent Vs Buy Calculator — 20 Expert FAQs
20 analyst-written answers to the questions practitioners actually ask — optimised for voice and answer-engine retrieval.
Is it cheaper to rent or buy?
It depends almost entirely on how long you stay. Over 7 years on a $420,000 home against $2,200 rent, buying costs $126,530.51 against $253,174.65 for renting. Over 3 years the gap narrows sharply or reverses.
How long do I need to stay for buying to pay off?
Commonly five to seven years, because round-trip transaction costs of 6 to 10% need time to amortise against appreciation. Below five years renting usually wins; beyond seven, buying usually does.
Why does the calculator count the deposit as a cost of buying?
It counts the return the deposit would have earned if invested instead — $50,885.64 over seven years at 7%. That opportunity cost is real and is the term informal comparisons almost always omit.
Is rent really throwing money away?
No more than mortgage interest is. In year one of a 6.5% mortgage, $21,729 of $25,485 paid is interest, which is as unrecoverable as rent. The difference is that part of your payment builds equity, not that all of it does.
Why is principal repayment not counted as a cost?
Because it converts cash into equity rather than consuming it. Counting it would overstate the cost of buying, just as counting savings deposits as an expense would overstate a household budget.
What maintenance figure should I use?
One percent of property value annually is the standard planning assumption and is what this model uses. Older properties run higher; new builds run lower initially but catch up as systems age.
How sensitive is the result to appreciation?
Extremely. At 4% nominal growth buying wins by $126,644 here; at 0% that margin collapses to about $3,241. Always run the comparison at several rates rather than relying on an optimistic single figure.
Does the calculator account for tax deductions?
No. Mortgage interest deductibility varies by jurisdiction, by whether you itemise and by caps that change with legislation. Including it would embed assumptions that do not hold for most filers.
What are typical selling costs?
Six to ten percent of the sale price, covering agent commissions, transfer taxes and legal fees. This model uses 7%, which on a $552,691.35 exit value is $38,688.39 — often more than a year of mortgage payments.
Should I include closing costs on the purchase?
They are a genuine cost of buying and worth adding to your own assessment. This model focuses on ongoing and exit costs; add the settlement figure from the closing cost calculator for a complete picture.
Does buying make sense if prices might fall?
It becomes a leveraged bet. With 20% down, a 10% price fall wipes out half your equity. If a purchase only works under optimistic appreciation, that is a signal to reconsider rather than to proceed.
What if rents rise faster than assumed?
Rent growth strongly favours buying, because a fixed mortgage payment is nominally frozen while rent compounds. Raising rent growth from 3% to 5% materially widens the gap in favour of ownership.
Is this rent vs buy calculator free to use?
Yes. It is free, requires no account, and has no usage limits. ApexConverter is funded by contextual advertising, never by selling user data.
Is my data sent to a server?
No. The engine runs as Vanilla JavaScript inside your browser under our Zero-Server Client-Side Execution model. Your figures are computed locally and are never transmitted, logged, or stored.
How accurate is this calculator?
It applies the standard closed-form formula in IEEE-754 double precision, rounding only at the display layer. The engine is reconciled against an independent reference implementation before release.
Does it work on mobile?
Yes. The interface is mobile-first with numeric keypad hints and is tested down to a 320-pixel viewport with no horizontal scrolling.
Can I use it offline?
Largely, yes. Because computation is client-side, the page continues to calculate without a network connection once it has loaded.
Which currency does it use?
Amounts display in US$ accounting format, but the underlying mathematics is currency-agnostic. The result is identical in any currency, so simply read the figures in your own.
Why does a result show an em-dash?
An em-dash indicates the calculation is not defined for the inputs given — typically a division by zero or a value outside the valid domain. We show a dash rather than a misleading number.
How do I report an error?
Email apexconverter.praxiscalc@gmail.com with the tool URL, your exact inputs, the output received and the output you expected. Verified mathematical errors are patched within 72 hours.