Best Investment Analysis Tools at a Glance
What each tool answers, the metric it produces, and who it's for. Every Reaixo tool below links straight to the calculator.
| Tool | What it answers | Primary metric | Best for |
|---|---|---|---|
| Cash Flow Calculator | Will the property produce monthly cash? | Monthly / annual cash flow | Rental investors |
| Cap Rate Calculator | What does the property earn before financing? | Cap rate | Comparing properties |
| Cash-on-Cash Calculator | What am I earning on the cash I put in? | Cash-on-cash return | Leveraged investors |
| Investment ROI Calculator | What is my overall return over the hold? | ROI, IRR | Overall performance |
| DSCR & Rental Stress Test | Can the property's income support the debt? | DSCR | Financed rentals |
| Mortgage Calculator | What does the financing cost each month? | Debt payment | Any financed purchase |
| Rental Break-Even (in Cash Flow Calculator) | What rent or occupancy covers every cost? | Break-even rent / occupancy | Risk analysis |
| Remodel / Rehab Cost Calculator | What might the renovation cost? | Rehab budget | Value-add properties |
| Fix & Flip Calculator | Does a flip pencil out? | Profit, ROI, max offer | Flippers |
| Scenario Analysis (this page) | What happens when assumptions change? | All of the above | Serious investors |
Analyze a Property
A quick underwriting run on Reaixo's shared engine - the same one behind the Investment ROI Calculator. Change anything and every metric updates.
ASSUMPTION Every input is your editable assumption - starting values are illustrative, and the 7% rate is an example, not a quoted market rate.
Investment Snapshot
Based on the assumptions entered - not a judgment of whether the property is a good investment.
What Is Investment Property Analysis?
How do you analyze an investment property?
Estimate the full purchase cost and financing, then realistic rent less vacancy, then every operating expense to get NOI. Subtract debt service and reserves for cash flow, calculate cap rate, cash-on-cash return and DSCR, and stress-test the assumptions. For a hold, add appreciation, loan paydown and sale costs to estimate long-term return.
Investment analysis combines six inputs into one answer about return and risk:
Purchase economics + Financing + Operating income + Operating expenses + Capital expenditures + Exit assumptions = Investment return and risk
- Property price
- Financing
- Rental income
- Operating expenses
- NOI
- Cash flow
- Returns
- Risk & sensitivity
A normal calculator answers one link in that chain - "what's the cap rate?" Connected analysis answers the question investors actually have: what happens to my cash flow, DSCR, cash-on-cash and overall return if the rent, price, financing, vacancy or renovation cost changes?
Tool #1 - Rental Cash Flow Calculator
How do you evaluate the cash flow of an investment property?
Subtract vacancy, every operating expense, debt service and a capital reserve from rental income. What's left is pre-tax cash flow - the money the property produces (or costs you) each month.
Cash Flow = Rental Income − Operating Expenses − Debt Service
Income includes base rent plus parking, storage, laundry and other recurring income. Expenses include property taxes, insurance, HOA, property management, repairs and maintenance, owner-paid utilities, vacancy, leasing costs and reserves - and then the mortgage payment.
The common shortcut, rent − mortgage = cash flow, leaves out most of that list. In the worked example below, rent minus the mortgage looks like +$1,254/month; after vacancy, operating costs and a CapEx reserve, modeled cash flow is +$7.
Tool #2 - Cap Rate Calculator
Cap Rate = NOI ÷ Property Value
NOI is effective income minus operating expenses, calculated before mortgage principal and interest, income taxes and depreciation. Because it ignores financing, cap rate lets you compare income properties on equal footing - a cash buyer and a leveraged buyer see the same cap rate.
Limitation: a higher cap rate isn't automatically better. Condition, location, tenant quality, appreciation potential and risk differ, and higher cap rates often compensate for more of them.
Tool #3 - Cash-on-Cash Return Calculator
Cash-on-Cash Return = Annual Pre-Tax Cash Flow ÷ Total Cash Invested
Total cash invested may include the down payment, closing costs, renovation costs, upfront financing costs and initial reserves. Cap rate analyzes the property's operations; cash-on-cash evaluates the return on your actual cash after financing. With the example's 25% down, cap rate is 6.50% while cash-on-cash is 0.09% - the gap is the effect of leverage at that interest rate.
Tool #4 - Investment ROI Calculator
How do you analyze real estate investment returns?
Combine the year-by-year cash flow with appreciation, loan principal paydown, any renovation-created equity and the proceeds from an eventual sale, net of selling costs. Express the result as total ROI on cash invested and as IRR, which accounts for when each dollar arrives.
ROI = Investment Gain ÷ Investment Cost
Simple ROI hides a lot. In real estate the gain usually includes operating cash flow, appreciation, principal paydown and disposition proceeds - and long-term ROI is very sensitive to the appreciation, rent-growth and holding-period assumptions. In the snapshot above, your 7-year total ROI is 84.1% with an IRR of 9.5% under a 3% appreciation assumption.
Tool #5 - DSCR Calculator
DSCR = Net Operating Income ÷ Annual Debt Service
DSCR shows whether the property's income covers its loan. Lenders use it to underwrite rental and DSCR loans, and investors watch it because it shows how much room the property has before income stops covering the debt. Rent declines, rising expenses, higher vacancy and higher interest rates all push it down - in the stress scenario below, DSCR moves from 1.09× to 0.70×.
Tool #6 - Mortgage and Financing Calculator
The same property can look very different under different financing. Loan amount, down payment, interest rate, term, points and lender fees set the monthly payment and the cash required - and through them, cash flow, cash-on-cash return and DSCR. Using your inputs above:
More down raises monthly cash flow and DSCR but ties up more cash, so cash-on-cash return moves differently. Mortgage insurance, where it applies, adds to the payment.
Tool #7 - Rental Break-Even Calculator
Break-even rent: the monthly rent at which income covers every cost. Break-even occupancy: the occupancy below which cash flow turns negative. The chain:
Annual rental potential → − Vacancy → Effective gross income → − Operating expenses → − Debt service → Break-even
With your current inputs, break-even occupancy is 90.0% and break-even rent is about $2,991/month. Because management and maintenance are a percentage of rent, break-even rent has to be solved rather than found by simple subtraction.
Tool #8 - Rehab / Renovation Cost Calculator
For value-add properties, the renovation budget often decides the deal. Typical line items: kitchen, bathrooms, flooring, paint, roof, HVAC, electrical, plumbing, windows, structural work, permits and a contingency.
Purchase Price + Rehab + Acquisition Costs + Holding Costs = Total Investment Basis
Underestimated rehab is one of the fastest ways to miss a return target: every extra dollar raises cash invested without raising rent. In the scenario table below, adding $20,000 of rehab is part of the stress case - and it lowers cash-on-cash return even before any rent or vacancy change.
Tool #9 - Fix & Flip Calculator
Inputs: purchase price, acquisition costs, rehab and contingency, after-repair value (ARV), financing and points, holding costs (taxes, insurance, utilities, HOA) over the holding period, and disposition costs. Outputs: total project cost, projected profit, ROI, annualized return, break-even sale price and maximum allowable offer.
The 70% rule (maximum offer ≈ 70% of ARV − repairs) is a screening benchmark, not a valuation engine - it can't know your financing, holding period or selling costs. Use it to filter, then run the full numbers.
Quick screen: the 70% Rule / Maximum Allowable Offer Calculator.
Tool #10 - Scenario & Sensitivity Analysis
The most useful question isn't "what's the return?" but "how wrong can my assumptions be before the deal stops working?" What if rent falls 10%, expenses rise 15%, rehab runs $20,000 over, vacancy increases, the rate is a point higher, or appreciation is lower than expected? This table runs your inputs from the analysis above through three cases:
Conservative: rent −5%, vacancy +3 pts, expenses +10%, rehab +$10,000, rate +0.5 pt. Stress: rent −10%, vacancy +7 pts, expenses +15%, rehab +$20,000, rate +1 pt. Appreciation is held at your assumption - change it above to test lower growth.
Metrics Every Real Estate Investor Should Know
What metrics matter most for rental property analysis?
For a rental: NOI, monthly cash flow, cap rate, cash-on-cash return, DSCR and break-even occupancy. For the full hold: ROI and IRR. Each answers a different question, so investors read them together rather than relying on any single number.
- Gross Rental Income
- Total scheduled rent plus other income, before any vacancy.
Monthly rent × 12 + other income - Effective Gross Income (EGI)
- Income you expect to actually collect after vacancy and credit loss.
Gross income − vacancy & credit loss - Net Operating Income (NOI)
- Property income after operating expenses, before mortgage payments, income taxes and depreciation.
EGI − operating expenses - Cap Rate
- Unlevered operating return - useful for comparing properties regardless of financing.
NOI ÷ property value or priceCalculate → - Monthly / Annual Cash Flow
- What remains after operating expenses, debt service and reserves.
NOI − debt service − reservesCalculate → - Cash-on-Cash Return
- Annual pre-tax cash flow relative to the cash you invested.
Annual cash flow ÷ total cash investedCalculate → - ROI
- Total gain relative to what you invested - in real estate usually including cash flow, appreciation, loan paydown and sale costs.
Investment gain ÷ investment costCalculate → - DSCR
- Whether NOI covers the loan payments. Lenders look at it for rental loans; requirements vary by lender.
NOI ÷ annual debt service - Operating Expense Ratio
- Share of collected income consumed by operating costs.
Operating expenses ÷ EGI - Vacancy Rate
- Share of potential rent assumed lost to empty periods and nonpayment.
Vacancy loss ÷ gross potential income - Break-Even Occupancy
- Occupancy at which income just covers operating expenses and debt service.
(Operating expenses + debt service) ÷ gross potential income - Loan-to-Value (LTV)
- How much of the price is financed.
Loan amount ÷ property value - Debt Yield
- A lender-side measure (mostly commercial) of NOI relative to the loan, independent of rate and term.
NOI ÷ loan amount - IRR
- Annualized return that accounts for the timing of every cash flow, including the sale. Calculated in the Investment ROI Calculator.
Rate at which NPV of all cash flows = 0Calculate → - Equity Multiple
- Total cash returned (cash flow plus sale proceeds) relative to cash invested, ignoring timing.
(Total cash returned) ÷ cash invested
Investment Property Analysis Workflow
- Estimate purchase and acquisition cost - price, closing costs, initial repairs.
- Estimate financing - down payment, rate, term, points and fees.
- Estimate realistic rental income from local comparables.
- Calculate vacancy-adjusted (effective) income.
- Estimate operating expenses - taxes, insurance, HOA, management, maintenance, utilities.
- Calculate NOI.
- Calculate financing costs (debt service).
- Calculate cash flow, after a CapEx reserve.
- Calculate cap rate and cash-on-cash return.
- Stress-test assumptions - rent, vacancy, expenses, rehab, rate.
- Estimate long-term returns - appreciation, paydown, sale costs, IRR.
- Compare the opportunity against alternatives for the same cash.
Worked Example
Purchase price $350,000 · 25% down · 7% for 30 years (an illustrative rate, not a market quote) · rent $3,000/month · taxes $5,500/year · insurance $1,500/year · no HOA · maintenance 5% · vacancy 5% · management 8% · CapEx reserve 5% · closing costs 3%. Calculated with Reaixo's shared engine:
Loan: $262,500; cash invested: $98,000. A 10% lower rent changes monthly cash flow by −$234 - more than the $300 rent drop alone suggests in percentage terms, because fixed costs and the mortgage don't fall with it. That's why sensitivity analysis matters.
Is There a Universal "Good" ROI?
What is a good ROI for a real estate investment?
There is no universal number. An acceptable return depends on risk, location, leverage, property type, strategy, holding period, liquidity and your own goals - and on what else the same cash could earn. Judge a return against comparable alternatives and against its downside scenarios.
A stable property in a strong rental market may justify a lower return than a value-add project with construction risk; a highly leveraged deal may show a high cash-on-cash return with a thin DSCR. Thresholds quoted online without that context aren't meaningful for your deal.
Which Calculator Should I Use?
What is the best calculator for rental property analysis?
For a rental, start with a cash flow calculator - it produces NOI, cash flow, cap rate, cash-on-cash and DSCR from one set of inputs. Add an ROI calculator for the full holding period, and scenario analysis to test the assumptions.
- I want to know monthly profitCash Flow Calculator
- I want to compare properties without considering financingCap Rate Calculator
- I want the return on the cash I actually investedCash-on-Cash Calculator
- I want to know whether the income supports the loanDSCR & Rental Stress Test
- I want my overall return, including appreciation and the saleInvestment ROI Calculator
- I'm buying, renovating and resellingFix & Flip Calculator
- I want a quick 70%-rule screen on a flipMaximum Allowable Offer (70% Rule) Calculator
- I want to know what happens if assumptions changeScenario analysis on this page
- I'm deciding whether to buy now or waitInvestment Timing Calculator
Calculator vs Spreadsheet vs Property Analysis Software
Best for one quick question - "what is the cap rate?" Fast and free, but each tool sees only its own inputs.
Best for investors who want fully custom models. Costs setup time, invites formula errors, needs manual updates and has no property data unless you add it.
Useful when you need many metrics at once, property data, scenario modeling, repeatable analysis and deal comparison.
Decision support that connects calculators on one engine with property information, labeled assumptions, scenario analysis, risks and investment outputs.
Investment Property Analysis Tools Compared
What are the best tools for real estate analysis?
It depends on the job. Deal-analysis software such as DealCheck covers rental and flip underwriting with property data; Mashvisor focuses on rental market data; Rentometer checks rent assumptions; Stessa tracks properties you already own; and Reaixo connects free calculators on one engine with property-level reports.
Zillow's Rent Zestimate is a free, model-based starting point for rent - Zillow describes it as computed from public property data and comparable rental listings, with accuracy depending on how many rentals are listed nearby. Treat any automated rent estimate as an input to verify, not a guaranteed rent.
Sources (checked October 2026)
- DealCheck - Plans & Pricing
- DealCheck - product overview
- Stessa - Pricing
- Mashvisor - Pricing
- Rentometer - Pricing
- Zillow - What is a Rent Zestimate?
- BiggerPockets and PropStream: features shown are those consistently described across their product pages and independent reviews; pricing and unconfirmed features are left unstated.
Common Mistakes When Analyzing Rental Properties
Using gross rent instead of NOI
Gross rent ignores every expense; returns should come from NOI and cash flow.
Ignoring vacancy
Turnover and nonpayment happen - model them.
Underestimating repairs
Small repairs add up every year.
Forgetting capital expenditures
Roofs, HVAC and water heaters eventually need replacing.
Ignoring property management
Model it even if you plan to self-manage.
Ignoring closing costs and financing fees
Both raise the cash invested and lower cash-on-cash return.
Assuming appreciation
Treat it as an uncertain assumption, not a plan to rescue weak cash flow.
Treating Zillow-style estimates as guaranteed rent
Automated rent estimates are starting points - verify with local comparables.
Looking only at cap rate
Cap rate ignores financing, so it cannot tell you whether your loan works.
Confusing cap rate with cash-on-cash return
One measures the property, the other your cash after financing.
Failing to stress-test
Small changes in rent, vacancy or rate can flip cash flow negative.
Using the 1% rule as a substitute for underwriting
It ignores expenses and financing entirely.
Using the 70% rule as a valuation method
It's a flip-screening benchmark, not an appraisal.
How Reaixo Calculates Investment Metrics
Every Reaixo investment calculator runs on the same underwriting engine: rent → vacancy → effective income → operating expenses → NOI → debt service → CapEx reserve → cash flow, then cap rate, cash-on-cash, DSCR, break-even and - over a holding period - ROI and IRR. Debt service is never part of NOI; the CapEx reserve sits below NOI. Each value carries a label so estimates never look like verified facts:
Property or market data retrieved from a source - e.g. recorded property taxes in a report.
A Reaixo-generated estimate - e.g. a rent estimate from comparables.
An input you control - e.g. vacancy, rate, growth.
A result derived from the above - e.g. cash flow, DSCR.
More detail: cash flow methodology and cap rate methodology. Related reading: rental property analysis guide, is this rental a good investment? and should I invest in real estate now?
Frequently Asked Questions
What are the best tools for analyzing investment properties?
A complete toolkit covers cash flow, cap rate, cash-on-cash return, ROI, DSCR and financing, rehab costs and scenario analysis. Individual calculators answer one question quickly; deal-analysis software and Reaixo connect the metrics so changing one assumption updates all of them.
How do I analyze a rental property's cash flow?
Start with realistic rent, subtract a vacancy allowance, subtract operating expenses (taxes, insurance, management, maintenance, HOA, owner-paid utilities) to get NOI, then subtract the mortgage payment and a CapEx reserve. The result is cash flow before income taxes.
What metrics are most important for real estate investors?
NOI, cash flow, cap rate, cash-on-cash return, DSCR and break-even occupancy for operations; ROI and IRR for total return over a holding period. Which matters most depends on the strategy - a flipper focuses on profit and maximum offer, a long-term landlord on cash flow and DSCR.
What is the difference between ROI and cash-on-cash return?
Cash-on-cash return measures one year of pre-tax cash flow against the cash invested. ROI measures total gain - often including cash flow, appreciation, loan paydown and sale costs - over the whole holding period.
What is the difference between cap rate and ROI?
Cap rate is NOI divided by price - a snapshot of operating return that ignores financing. ROI measures the investor's total return on their own cash, so it reflects leverage, appreciation and the eventual sale.
What is a good cap rate?
There is no universal good cap rate. Cap rates vary by market, property type, condition and risk; a higher cap rate often comes with higher risk or weaker appreciation prospects. Compare cap rates for similar properties in the same market.
What is a good cash-on-cash return?
It depends on leverage, risk, the market, holding period and what else you could do with the cash. Rather than chase a single benchmark, compare the return against your alternatives and stress-test it.
What expenses should I include when analyzing a rental property?
Property taxes, insurance, HOA, property management, maintenance and repairs, owner-paid utilities, vacancy, leasing and turnover costs, a CapEx reserve, and - after NOI - the mortgage payment. Also count closing costs, financing fees and initial repairs as cash invested.
How do I calculate NOI?
NOI = effective gross income (rent plus other income, minus vacancy) − operating expenses. Mortgage principal and interest, income taxes and depreciation are not included.
Does the mortgage payment count in NOI?
No. NOI is calculated before debt service. The mortgage payment is subtracted after NOI to get cash flow.
How do I calculate DSCR on a rental property?
Divide annual NOI by annual debt service (principal and interest). A DSCR above 1.0× means NOI covers the payments; lenders set their own minimums.
How much vacancy should I assume?
Use local rental vacancy data and your own turnover expectations rather than a fixed rule, then test higher vacancy in a stress scenario to see how much room the numbers have.
Should property management be included if I manage the property myself?
Modeling it is useful: it shows whether the property still works if you later need a manager, and it values your own time.
How do renovation costs affect ROI?
Rehab costs increase the cash you invest, which lowers cash-on-cash return and ROI unless the work raises rent or value enough to compensate. Underestimated rehab is one of the most common ways returns fall short.
Can I analyze an investment property without a spreadsheet?
Yes. The calculators on this page run the same underwriting a spreadsheet would - cash flow, NOI, cap rate, cash-on-cash, DSCR, ROI and IRR - without setting up formulas.
What is the 1% rule?
A screening shortcut: monthly rent of at least 1% of the purchase price. It ignores taxes, insurance, financing and every other expense, so it can only flag properties worth a closer look.
Is the 1% rule still useful?
Only as a quick filter. In many markets few properties meet it, and properties that do can still lose money after expenses. A full cash flow analysis replaces it.
What is the 70% rule for real estate investing?
A flip-screening benchmark: maximum offer ≈ 70% of after-repair value minus repair costs. It is a rough benchmark, not a valuation - holding, financing and selling costs vary by deal.
Should I use cap rate or cash flow to evaluate a rental?
Both. Cap rate compares the property against others independent of financing; cash flow tells you what your financed investment actually produces. A property can have an attractive cap rate and still negative cash flow at a high interest rate.
How does Reaixo analyze investment properties?
Reaixo's calculators share one underwriting engine, so cash flow, NOI, cap rate, cash-on-cash, DSCR, break-even, ROI and IRR all come from the same assumptions. Every input is labeled as an assumption and every output as calculated; property reports add sourced and estimated property data, each labeled as such.
Reaixo provides estimates, calculations and educational decision-support tools. Results depend on the assumptions and information entered and should not be considered financial, investment, tax, legal, appraisal or lending advice. Verify property, financing, tax and operating information with appropriate professionals before making an investment decision.