Rental property calculators built for the questions behind the deal.
Run a connected first-pass rental analysis, learn what each metric means, and know exactly what to verify before an address earns deeper underwriting.
Calculator directory
Open a focused rental calculator
Each page uses the same connected assumptions, then adds focused explanations, guides, mistakes to avoid, and FAQ.
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Rental property calculator
Put price, rent, loan, tax, insurance, vacancy, maintenance, and repair assumptions in one place. The calculator returns the core rental-property metrics from that same scenario, so you can see trade-offs rather than chase a single flattering number.
Calculate a rental dealOne assumption set, six answers
- Mortgage payment
- Monthly cash flow
- Cap rate
- Cash-on-cash return
- Gross rent multiplier
- Break-even rent
For educational screening only. Verify property facts, costs, financing, rent, and market conditions before acting.
A better way to screen a rental
A rental property calculator should reveal the work—not hide it.
Real estate investors often begin with a single question: will this property cash flow? That question is useful, but the answer depends on the inputs behind it. Purchase price, rent, down payment, interest rate, property tax, insurance, vacancy, maintenance, capital expenditures, and initial repairs all pull on the same result. A transparent calculator helps you see those connections before a listing becomes an emotional decision.
Use these rental property calculators as a disciplined first screen for a buy-and-hold rental, BRRRR opportunity, or a property you are comparing with another listing. Enter an initial case quickly, then slow down on the inputs that could materially change your result. For example, market rent should come from relevant local evidence, and a repair estimate should reflect condition rather than the optimistic language of a listing.
The strongest use of an investor calculator is not finding a perfect percentage. It is documenting a scenario you can challenge. Review the 20-minute rental analysis checklist, build a complete expense budget, then move into a full report when a property survives the first pass.
What the calculator explains
Every metric is a different question—not a verdict.
Use the tools together to locate the assumption that matters most. Each result below is calculated in the rental-property calculator and paired with a guide for deeper context.
Mortgage payment
Loan amount, interest rate, and term
See the debt-service estimate from your asking price, down payment, rate, and loan term. It is not the whole deal, but it often makes a marginal deal fail.
Open mortgage payment calculatorMonthly cash flow
Rent − vacancy − operating costs − debt service
Model the income remaining after recurring costs. It is a scenario result, not a promise: rent, insurance, repairs, and vacancy need address-level verification.
Open cash flow calculatorCap rate
Annual NOI ÷ purchase price
Compare operating performance before financing. Cap rate is useful for similar properties, but it deliberately ignores your actual loan and cash invested.
Open cap rate calculatorCash-on-cash return
Annual pre-tax cash flow ÷ cash invested
See how modeled annual cash flow relates to cash put into the deal. It changes with your loan terms and down payment, unlike cap rate.
Open cash-on-cash calculatorGross rent multiplier
Purchase price ÷ annual gross rent
Use GRM for an early comparison of price against gross income. It omits taxes, insurance, maintenance, vacancy, and financing.
Open GRM calculatorBreak-even rent
Rent needed to cover recurring costs
Find the rent level at which modeled recurring costs are covered. Compare it to credible local evidence to see the real cushion.
Open break-even calculatorA practical workflow
Use a calculator to eliminate weak deals early.
The aim of a first pass is not to manufacture a yes. It is to decide whether the property deserves your next hour, better source documents, and an address-specific valuation review.
Read the full first-pass checklist- 1
Enter a conservative starting case
Use the asking price and an estimated monthly rent, then enter financing and operating assumptions you can defend today.
- 2
Read the metrics together
Cash flow, cap rate, cash-on-cash return, GRM, and break-even rent answer different questions. A strong number in one column does not erase a weak one in another.
- 3
Test the downside
Raise the rate, reduce rent, increase vacancy or maintenance, and see which input makes the deal fragile. Do not wait until after an offer to find the break point.
- 4
Move to an address-specific report
When the first pass is worth pursuing, create a report to keep assumptions, valuation context, comparable properties, and a shareable decision record together.
A fast screen needs better inputs
What to verify before trusting the output.
| Input | Use a credible source | Why it matters |
|---|---|---|
| Monthly rent | Relevant, current local rent evidence—not only the listing | Rent affects cash flow, GRM, cash-on-cash return, and the cushion above break-even. |
| Taxes and insurance | Address-level bills, quotes, and expected post-purchase changes | A small monthly miss can erase a narrow cash-flow margin. |
| Financing | Your lender terms, expected fees, and cash required to close | The loan changes payment and cash-on-cash return even when cap rate stays the same. |
| Condition and repairs | Inspection, contractor input, photos, disclosures, and reserve policy | Repairs can change cash invested, recurring costs, rent timing, and the valuation story. |
| Value and comps | Recent, relevant sales with inclusion/exclusion notes | An appealing yield does not prove the purchase price or ARV is supported. |
Investor education
Keep the calculation connected to the real work.
These pages turn a calculator result into a documented underwriting process, with guidance on assumptions, ARV, comparable properties, and due diligence.
Sample report
See a clearly labeled illustrative analysis and how its value, assumptions, and metrics fit together.
Open guideHow Dwelize works
Follow the route from address search to assumptions, ARV, selected comps, and sharing.
Open guideMethodology & AI disclosure
Understand the difference between AI ARV, comp-derived value, and calculated underwriting metrics.
Open guideDue-diligence checklist
Validate rent, expenses, condition, financing, value, and exit assumptions before an offer.
Open guideInvestor tools FAQ
Clear answers about the calculator, its assumptions, and the next step after a first pass.
Yes. The calculator is available as a free educational screening tool. There is no checkout flow or credit card required.
One connected rental-property calculator produces mortgage payment, monthly cash flow, cap rate, cash-on-cash return, GRM, and break-even rent from the same assumption set. This avoids comparing outputs calculated from inconsistent inputs.
Use a conservative assumption you can explain for the local market and property condition. Test more than one case, especially when the property is older, rent is uncertain, or its condition is unclear.
Yes. Enter annual property taxes and insurance along with financing, vacancy, maintenance, and repairs. Verify the figures for the address; do not assume a seller’s current cost will apply to you.
No. Cap rate measures net operating income before financing. Cash-on-cash return compares annual pre-tax cash flow with cash invested, so it changes with loan terms and down payment.
No. It shows the result of your inputs. A purchase decision also needs condition, rent evidence, comparable sales, local rules, financing terms, inspections, and your own risk tolerance.
Create a full Dwelize report, document the assumptions, review value and comparable-property context, and run a downside scenario before making or removing an offer contingency.
Ready to move from a screen to a documented deal?
Create a report for a real U.S. property when you need editable assumptions, valuation context, selected comps, deal analysis modes, and a shareable view for your next conversation.