Rent vs. Buy Calculator — Should You Rent or Buy a Home?

Guide

What Is the Rent vs. Buy Calculator?

Last updated: July 2026 · Reviewed by the NeftCal editorial team

The Rent vs. Buy Calculator answers one of the biggest financial questions most people face — whether it's cheaper, over a specific time horizon, to buy a home or to keep renting and invest the money you would have spent on a down payment. Unlike a simple "mortgage payment vs. rent" comparison, this calculator runs both scenarios simultaneously from a single set of inputs, simulating them month by month for up to 30 years, so the comparison reflects real ownership costs on one side and real opportunity cost on the other.

On the buying side, the calculator tracks your down payment, closing costs, full mortgage amortization, property tax, home insurance, HOA fees, and maintenance — then nets out what you'd actually walk away with if you sold the home at your chosen comparison year, after selling costs and your remaining loan balance. On the renting side, it tracks your cumulative rent paid, but also grows an investment portfolio seeded by the down payment and closing costs you didn't spend, plus every month renting turns out to be the cheaper option. The result is two comparable "net cost" figures — Net Cost of Buying and Net Cost of Renting — plus a break-even year showing exactly when buying starts to win.

Who Should Use This Calculator

First-time buyers deciding whether to buy now or keep saving while renting, current renters weighing a lease renewal against a purchase, people relocating for a job who aren't sure how long they'll stay, and homeowners revisiting the decision after a rate change all benefit from seeing the full, apples-to-apples cost comparison instead of relying on a rule of thumb.

Why It Matters for Financial Planning

Housing is usually the largest line item in a household budget, and the rent-vs-buy decision is rarely as simple as "renting is throwing money away." A down payment and closing costs are real capital that could be invested elsewhere, mortgage interest and ownership costs compound differently than rent, and selling a home isn't free. Modeling the true net cost of each path — including the opportunity cost of capital — leads to a much better-informed decision than comparing a single monthly payment number.

Common Scenarios

Comparing a specific home listing's numbers against your current rent before making an offer
Testing how sensitive the decision is to your assumed home appreciation or investment return rate
Checking your break-even year against how long you actually plan to stay in an area
Deciding between a 15-year and 30-year mortgage term using the Mortgage Calculator, then feeding that term into this comparison
Sizing a realistic down payment with the Down Payment Calculator before running the full rent-vs-buy comparison

Tips for Accurate Results

Use your actual expected local property tax rate and insurance quote, not national averages — both vary significantly by location
Set "Years to Compare" to how long you realistically expect to stay, not an arbitrary round number
Keep your Investment Return %/yr honest and conservative — it drives the entire renting-side portfolio and can make renting look better than it would in practice if set too high
Don't ignore Selling Costs % — a 6-8% hit on an appreciated home is a real cost that's easy to forget when comparing to renting
Re-run the comparison whenever mortgage rates, rents, or your expected time horizon change materially

Formula

How the Rent vs. Buy Comparison Is Calculated

Both scenarios are simulated month by month from the same set of inputs, then compared at your chosen year

Net Cost of Buying at Year t

Cumulative Buy Cash Outlay(t) = Down Payment + Closing Costs + Σ (Monthly P&I + Property Tax + Insurance + HOA + Maintenance), months 1 to 12t
Net Sale Proceeds(t) = Home Value(t) × (1 − Selling Costs %) − Remaining Loan Balance(t)
Net Cost of Buying(t) = Cumulative Buy Cash Outlay(t) − Net Sale Proceeds(t)

Net Cost of Renting at Year t

Cumulative Rent Paid(t) = Σ Monthly Rent, months 1 to 12t
Investment Portfolio(t) = [(Down Payment + Closing Costs) compounded monthly at the Investment Return %] + [Σ monthly (Buying Cost − Rent), whenever positive, compounded forward to year t]
Net Cost of Renting(t) = Cumulative Rent Paid(t) − Investment Portfolio(t)

Break-Even Year

The first year t (1–30) where Net Cost of Buying(t) < Net Cost of Renting(t). If this never happens within 30 years, the calculator reports it as beyond the 30-year horizon.

⚙️ Why This Formula Works

Both scenarios draw on the same monthly budget so the comparison is apples-to-apples: the buyer's cash goes into a home that builds equity and can be sold, while the renter's unspent capital — the down payment, closing costs, and any month renting is cheaper — is assumed to be invested instead. Subtracting what each side would recover (sale proceeds for buying, portfolio value for renting) from what each side spent (cash outlay for buying, rent paid for renting) produces two genuinely comparable net cost figures.

🎯 When to Use It

Before committing to a home purchase or a multi-year lease renewal
When your expected time horizon in a home or area is uncertain
When mortgage rates or your investment return outlook change materially
When comparing a specific listing's numbers against your current rent

📋 Assumptions

Fixed-rate mortgage for the full loan term, no refinancing modeled
Home appreciation, rent growth, and investment return compound monthly at the rates you enter
Property tax and maintenance scale with the home's current appreciated value; insurance and HOA stay flat
The home is assumed sold at your comparison year to calculate net sale proceeds

⚠️ Limitations of the Formula

Does not model mortgage interest or property tax deductions, or capital gains exclusions on a home sale
Does not model rent control, adjustable-rate mortgages, or refinancing mid-term
Assumes the renter actually invests the monthly savings difference with discipline every month
Real markets are far less smooth than a fixed compounding rate — treat results as a planning estimate

Walkthrough

Step-by-Step: How to Use the Rent vs. Buy Calculator

From your buying and renting details to a full comparison in under a minute

Enter your buying details

Input the home price, down payment %, interest rate, loan term, property tax rate, home insurance, HOA fee, maintenance %, home appreciation %, closing costs %, and selling costs %.

Enter your renting details

Input your monthly rent, expected annual rent growth %, and the investment return %/yr you'd expect on money you don't spend on a down payment.

Set Years to Compare

Choose how many years into the future — 1 to 30 — you want to compare, based on how long you realistically expect to stay in the home or area.

Click Calculate

The calculator instantly runs a year-by-year simulation of both the buying and renting scenarios simultaneously, using the same monthly budget assumptions.

Review your results

Compare Net Cost of Buying vs. Net Cost of Renting at your chosen year, read the verdict banner and break-even year, and review the 30-year line chart and year-by-year table.

Example

Worked Example

A realistic calculation using this calculator's own default input values, compared at year 7

Scenario

A $400,000 home with 20% down ($80,000), a 6.8% 30-year mortgage, 1.1%/yr property tax, $1,400/yr insurance, no HOA, 1%/yr maintenance, 3.5%/yr appreciation, 2% closing costs, and 7% selling costs — compared against renting an equivalent home for $2,200/month with 3%/yr rent growth, investing the difference at 6%/yr, over 7 years.

Home Price$400,000

Down Payment (20%)$80,000

Loan Amount$320,000

Interest Rate6.8% / 30 yr

Closing Costs (2%)$8,000

Monthly Rent$2,200

Step 1 — Initial capital: Down payment $80,000 + closing costs $8,000 = $88,000. This is the lump sum the calculator assumes a renter invests immediately at 6%/yr, since a buyer would spend it instead.

Step 2 — Month 1 mortgage payment: On a $320,000 loan at 6.8% over 360 months, the standard amortization formula gives a principal & interest payment of $2,086.16/month.

Step 3 — Month 1 total buying cost: P&I $2,086.16 + property tax (1.1% of appreciated value) $367.74 + insurance $116.67 + maintenance (1% of appreciated value) $334.31 + HOA $0 = $2,904.87/month, versus rent of $2,200 — the buyer's monthly cost is $704.87 higher from month one.

Step 4 — Year 7 snapshot: Home value has grown to ≈$510,866 and the loan balance has fallen to ≈$290,753, so home equity built ≈ $220,113. Selling at year 7 (after 7% selling costs) nets ≈$184,353 in sale proceeds. Cumulative buy cash outlay (down payment + closing costs + 84 months of P&I, tax, insurance, maintenance) is ≈$339,751, so Net Cost of Buying ≈ $339,751 − $184,353 = $155,399.

Step 5 — Renting side at year 7: Cumulative rent paid over 84 months is ≈$205,352. The invested $88,000 plus every month's savings from renting being cheaper has grown to an investment portfolio of ≈$192,431, so Net Cost of Renting ≈ $205,352 − $192,431 = $12,921.

Net Cost of Buying (Yr 7)

$155,399

Net Cost of Renting (Yr 7)

$12,921

Break-Even Year

Year 22

Explanation: At year 7, renting and investing the difference is cheaper by roughly $142,478 in this example — mainly because the $88,000 that would have gone to a down payment and closing costs has had 7 years to compound at 6%/yr, and the buyer's all-in monthly cost (P&I + tax + insurance + maintenance) starts out well above rent. As the mortgage balance shrinks and the home keeps appreciating, buying's net cost keeps closing the gap — in this scenario it doesn't overtake renting until year 22. Change the interest rate, appreciation rate, or investment return even slightly and this break-even point can move by years in either direction, which is exactly why running your own numbers matters more than a rule of thumb.

Interpretation

Understanding Your Results

How your break-even year relates to how long you actually plan to stay

The single most useful number from this calculator, beyond the two net-cost figures, is the break-even year — compare it against how long you realistically expect to stay in the home or area, not against the "Years to Compare" figure you happened to type in.

Your Expected Stay vs. Break-Even Year	General Read	Typical Context
Well beyond the break-even year	Buying likely cheaper	Long-term stay gives equity and appreciation time to outweigh transaction costs
Close to the break-even year (±2 yrs)	Toss-up	Result is sensitive to your rate, appreciation, and return assumptions — test a conservative case too
Well short of the break-even year	Renting likely cheaper	Short stay; closing and selling costs and upfront capital aren't recovered in time

For buyers: if your comparison year's Net Cost of Buying is close to or below Net Cost of Renting, and your planned stay comfortably exceeds the break-even year, the numbers favor buying — assuming your appreciation and rate assumptions are reasonable.

For renters: a break-even year far beyond your planned stay is a strong signal that renting and investing the difference is the financially stronger path for your specific timeline, even if it feels counter to conventional wisdom.

Sensitivity matters: this comparison is genuinely sensitive to the Investment Return %/yr and Home Appreciation %/yr inputs. Re-run the calculator with a conservative case (lower return, lower appreciation) and an optimistic case before treating either verdict as settled.

ℹ️

This tool provides general financial estimates for educational purposes only and does not constitute personalized financial, tax, or real estate advice. Actual home values, rents, investment returns, and transaction costs vary and are not guaranteed to follow the fixed rates entered here — confirm major decisions with a licensed financial advisor or real estate professional.

Use Cases

Practical Use Cases for the Rent vs. Buy Calculator

Where this calculator earns its keep

🏡

First-time buyer timing

Decide whether to buy now or keep renting and saving toward a larger down payment.

🧳

Relocation decisions

Compare renting temporarily vs. buying immediately when moving somewhere new and uncertain how long you'll stay.

💼

Career uncertainty

Weigh the flexibility of renting against building equity when your job situation might require another move.

📈

Rate environment check

See how a higher or lower mortgage rate shifts the break-even year relative to typical investment returns.

🏘️

HOA-heavy condo markets

Test whether steep HOA fees tip the balance toward renting in condo-dominated markets.

🧓

Retirement downsizing

Compare buying a smaller home against renting in retirement when investment income matters more.

🤝

Financial advisor conversations

Give clients a transparent, adjustable model instead of a one-size-fits-all rule of thumb.

🔁

Lease renewal decisions

Decide whether to renew a lease or make the jump to buying before signing another year.

🏗️

New listing evaluation

Plug in a specific home's asking price and taxes to see exactly how it compares to your current rent.

📊

Scenario stress-testing

Run conservative and optimistic appreciation/return scenarios side by side before committing.

Pros & Cons

Advantages and Limitations

What this rent vs. buy calculator does well, and where it can't replace personalized advice

✅ Advantages

Simulates buying and renting simultaneously from one set of inputs, month by month, for up to 30 years
Models the opportunity cost of the down payment and closing costs if invested instead of spent
Automatically calculates the break-even year — when buying starts to cost less than renting
Accounts for full mortgage amortization plus property tax, insurance, HOA, and maintenance
Nets out selling costs and remaining loan balance for a realistic sale-proceeds figure
Shows home equity built and investment portfolio value side by side at any comparison year
Visualizes 30 years of net cost trends in a single line chart
Provides a full year-by-year comparison table, not just a single snapshot
Free, instant, and requires no signup
Runs entirely in your browser — your financial details are never sent to a server

⚠️ Limitations

Does not model mortgage interest deductions, property tax deductions, or capital gains exclusions
Does not model rent control, adjustable-rate mortgages, or mid-term refinancing
Assumes appreciation, rent growth, and investment returns compound smoothly — real markets don't
Assumes the renter actually invests the monthly savings difference with discipline every month
Property tax and insurance figures are only as accurate as what you enter
Does not account for moving costs, storage, or other relocation expenses beyond closing/selling %
Doesn't factor in credit score, loan approval odds, or lender-specific terms
Results are estimates — not a substitute for a licensed financial advisor or real estate professional

Reference

Net Cost Comparison by Year

Using the worked example's default inputs — a $400,000 home, 20% down, 6.8%/30yr, vs. $2,200/mo rent

Year	Net Cost of Buying	Net Cost of Renting	Cheaper Option
3	$89,926	-$47,907	Renting
5	$123,667	-$18,614	Renting
7	$155,399	$12,921	Renting
10	$198,705	$64,818	Renting
15	$257,033	$164,930	Renting
20	$293,121	$271,195	Renting
30	$265,681	$461,348	Buying

A negative Net Cost of Renting means the investment portfolio has grown larger than the cumulative rent paid — the renter is net ahead in this scenario. In this specific example, buying doesn't become the cheaper option until year 22.

Common Mistakes and Expert Tips

❌ Common Mistakes

Assuming renting is always "throwing money away" without accounting for the investable difference
Ignoring selling costs (typically 6-8%) when estimating what buying "really" costs
Assuming home appreciation always matches or beats typical long-term investment returns
Forgetting maintenance and HOA costs when budgeting to buy
Comparing the raw mortgage payment to rent instead of the full P&I + tax + insurance + maintenance total
Ignoring how long you'll actually stay compared to the calculated break-even year

💡 Expert Tips & Best Practices

Run both a conservative and an optimistic appreciation/return scenario, not just one set of numbers
Match "Years to Compare" to your realistic time horizon in the home, not a round number
Use real, local numbers for property tax and insurance rather than national averages
Re-run the comparison whenever mortgage rates or your expected stay length change materially
Pay attention to the break-even year, not just the single-year net cost snapshot
Keep the investment return input honest and conservative — it drives the entire renting-side result

FAQ

Frequently Asked Questions

Common questions about the rent vs. buy comparison and this calculator

What does the Rent vs. Buy Calculator actually compare?

It runs two scenarios side by side using the same "Years to Compare" horizon — the full cost of buying a home (down payment, closing costs, mortgage principal & interest, property tax, insurance, HOA, and maintenance, minus what you'd net from selling) against the full cost of renting (cumulative rent paid, minus a growing investment portfolio funded by your down payment and any month renting is cheaper than buying). The difference between these two "net cost" figures tells you which option is cheaper at your chosen year.

How is the "Net Cost of Buying" calculated?

Net Cost of Buying at year t equals your cumulative buying cash outlay (down payment + closing costs + every monthly mortgage payment, property tax, insurance, HOA, and maintenance payment through year t) minus your net sale proceeds if you sold the home at year t (home value after selling costs, minus your remaining loan balance). A lower number means buying cost you less, after accounting for the equity and appreciation you'd get back by selling.

How is the "Net Cost of Renting" calculated?

Net Cost of Renting at year t equals your cumulative rent paid through year t minus your investment portfolio value at year t. That portfolio starts with your would-be down payment and closing costs invested from day one, and grows every month you spend less on rent than the buyer's total monthly housing cost, since the calculator assumes you invest that difference at your chosen investment return rate.

What is the break-even year, and why does it matter?

The break-even year is the first year in the 30-year simulation where the Net Cost of Buying drops below the Net Cost of Renting — the point where buying becomes the cheaper option overall. If you expect to stay in the home longer than the break-even year, buying tends to win financially; if you expect to move sooner, renting (and investing the difference) tends to come out ahead.

Does the calculator account for the money I'd otherwise invest instead of buying?

Yes. This is central to the comparison. The calculator assumes a renter invests the down payment and closing costs they didn't spend, plus any month their total housing cost is lower than the buyer's, at your chosen "Investment Return %/yr." That growing portfolio is subtracted from cumulative rent paid to get the true Net Cost of Renting.

Does it include closing costs and selling costs?

Yes. Closing Costs % is applied as an upfront cost added to the buyer's cash outlay in year zero, and Selling Costs % is subtracted from the home's appreciated value when estimating net sale proceeds at your comparison year — both are real costs of buying and eventually selling that are easy to overlook in a simple rent-vs-mortgage-payment comparison.

Does it include property tax, insurance, HOA, and maintenance?

Yes. Property tax and maintenance are calculated as a percentage of the home's current (appreciated) value each year, home insurance is a flat annual amount, and HOA is a flat monthly fee — all four are added to the mortgage principal & interest payment to get the buyer's true total monthly housing cost, which is also what's compared against monthly rent.

Does it factor in home appreciation?

Yes. Home Appreciation %/yr compounds monthly, growing both the home's value (which increases property tax and maintenance costs, since they're based on current value) and the estimated sale proceeds if you sold at your comparison year.

What investment return should I use for the renting scenario?

Use a realistic, honest long-term return for wherever you'd actually invest the money — a diversified index fund, a savings account, or another instrument — rather than an optimistic best-case number. Since this input drives the entire renting-side investment portfolio, an overly aggressive assumption will make renting look artificially better than it likely would be in practice.

Does this calculator account for tax deductions like mortgage interest?

No. This calculator focuses on the direct cash costs of buying versus renting and does not model mortgage interest deductions, property tax deductions, or capital gains exclusions on a home sale, all of which vary by country, tax bracket, and filing details. If those deductions are significant for your situation, factor them in separately.

What if my mortgage term is shorter than my "Years to Compare"?

The simulation stops charging principal & interest once your loan term ends and the balance reaches zero, while property tax, insurance, HOA, and maintenance continue for every year you compare. If you compare at a year beyond your loan term, the buyer's monthly cost drops once the mortgage is paid off, which the calculator reflects automatically.

Is a longer Years to Compare always better for buying?

Generally, yes — the longer you hold a home, the more time it has to build equity and appreciate, which is why buying tends to become cheaper than renting only after the break-even year. But this isn't guaranteed in every scenario; if your investment return assumption is high relative to home appreciation and your mortgage rate, renting can remain cheaper for a very long time, as this calculator's own worked example shows.

How accurate is this calculator compared to my real financial outcome?

It's a planning estimate based on the assumptions you enter — fixed appreciation, rent growth, and investment return rates compounding steadily every month. Real markets are far less smooth: home prices and rents fluctuate, investment returns vary year to year, and your own move timing may not match your original plan. Use it to compare scenarios and understand sensitivities, not as a guaranteed prediction.

Is my data private, and is this calculator free?

Yes to both. All calculations run locally in your browser using JavaScript — none of your financial inputs are transmitted to or stored on a server. The calculator is completely free to use, with no signup required.

Can I use this calculator to decide whether to sell an existing home and buy another?

Yes, with some adaptation. Enter your existing home's estimated sale proceeds as an offset to the new down payment and closing costs in your own budgeting, then run the buying scenario for the new home against what renting an equivalent home would cost. The calculator itself assumes you're starting from a rented or otherwise unowned situation, so you may need to net out your current equity manually.