Free real estate calculator

BRRRR Calculator

Track cash left in your buy, rehab, rent, refinance and repeat deal.

By Calculate My Property EditorialUpdated September 30, 2026Professional review pending
01 / Your inputs

Start with your property.

Property2 inputs
USD
Use the agreed purchase price, excluding closing costs.
USD
Acquisition2 inputs
USD
Cash fees paid at acquisition; do not include the down payment.
USD
Include materials, labor, permits and a contingency.
Income4 inputs
USD / month
Use rent for one unit; enter other income separately.
units
Rent above is per unit.
USD / year
Parking, laundry or other recurring revenue.
%
Apply to scheduled gross income; include credit loss.
Operating expenses8 inputs
USD / year
Use the expected post-purchase bill, including reassessment.
USD / year
Property and landlord cover, not mortgage insurance.
%
Charged against collected income in this model.
%
Routine repairs as a share of collected income.
%
Future roofs and replacements. Deducted after NOI.
USD / year
Include only owner-paid dues.
USD / year
Exclude amounts paid directly by tenants.
USD / year
Legal, accounting, licensing and other recurring costs.
Financing5 inputs
%
Loan amount as a share of purchase price.
%
Contract note rate; fees and points are entered separately.
years
Remaining amortization period, not a balloon maturity.
%
One point equals 1% of loan principal.
Projection4 inputs
years
Cash flows occur at year end; sale happens in the final year.
%
Scenario assumption, not a price forecast.
%
Net income and reserves grow at the same assumed rate.
%
Selling expenses as a share of future sale price.
Refinance3 inputs
%
Refinance is based on ARV, subject to lender appraisal.
%
Amortizing refinance rate.
USD
Paid from refinance proceeds.
All amounts in USD.
Your estimate

Cash left in the deal

$26,500Based on your inputs · USD
Net refinance cash-out
$68,000
Post-refi annual cash flow
-$10,510
Post-refi cash on cash
-39.66%
See the breakdown
Initial cash invested
$94,500
New refinance loan
$337,500
Acquisition payoff
$262,500
Refinance costs
$7,000
The formula

Cash left = cash invested − net refinance cash-out

Assumptions & limitations (2)
  • Illustrative, pre-tax analysis. Capital reserves are deducted after NOI. Operating percentages apply to collected income.
  • Acquisition debt assumes no principal reduction before refinancing. Seasoning, draw interest, DSCR and appraisal can reduce cash-out. Zero/negative cash left makes cash on cash undefined.
02 / Your next decisionDSCRCash on Cash Return
External resource

Compare written financing offers.

Check lender licensing, fees, reserves and repayment terms with your saved numbers.

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Planning estimate. Editorially sourced; independent professional review is pending. How we calculate
Worked example

Follow the default numbers.

With purchase price of $350,000, monthly rent of $2,400, the model gives cash left in the deal: $26,500.

The formula is cash left = cash invested − net refinance cash-out. Open the breakdown to trace expenses and assumptions. Change one input at a time to see how your decision changes. This example uses scenario inputs; it is not an offer, tax bill, appraisal or legal determination.

Separate the two financings

Acquisition debt is based on purchase price; refinance debt is based on the entered after-repair value and refinance LTV. The initial investment includes the down payment, purchase costs, rehab and acquisition points. At refinance, the new loan repays the old acquisition principal and refinance costs. The remaining net cash-out is compared with that initial investment.

Cash left can be negative

Positive cash left means some original equity remains tied up in the property. Zero means the modeled refinance returns the initial cash. A negative amount means proceeds exceed that investment; it is shown as excess cash returned rather than an infinite or negative-denominator cash-on-cash percentage. Cash returned is borrowed money secured by the property, not operating profit.

Refinance terms can change the result

Seasoning requirements, lender cost-basis rules, appraiser value, reserves and cash-out limits can reduce the eligible loan below a simple ARV percentage. The model assumes the acquisition balance remains outstanding through rehab and does not add undocumented refinance proceeds. Include interest and holding expenses in your acquisition costs if they are part of your funded cash budget.

The rental still has to work

The post-refinance payment uses the new rate and the amortization term entered in the financing section. Operating NOI and capital reserves use the same rental model as the other investment tools. A successful cash-out event does not guarantee recurring positive cash flow. Test a lower appraisal and higher refinance rate before treating returned equity as money available for the next purchase.

Keep your assumptions with the result

Save the calculation to your deal file to reuse compatible inputs in another tool. The file stays in this browser on this device. Download the CSV to open the complete inputs, results and schedule in Excel or Google Sheets. Use PDF to print the report or save it as a PDF. A share link includes entered financial figures in its URL, so use it only with people you intend to share those numbers with.