Property cash flow decision tool

Rental Cash Flow Calculator

Calculate monthly cash flow, annual rental profit, operating costs, mortgage drag, net yield and cash-on-cash return for investment property analysis.

Monthly and annual view
Operating vs financed return
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Primary result
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monthly cash flow
Financed view
Net annual
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Net yield
0.00%
CoC return
0.00%
11 occupied months Mortgage included Positive cash flow
Positive
This property generates positive cash flow under the current assumptions.
Gross yield
0.00%
before costs
Net yield
0.00%
after costs
CoC return
0.00%
cash invested basis
Vacancy loss
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annual
Gross to net yield drop
0.00 pts
Annual costs as share of collected rent
0.00%
Total annual costs
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Potential annual rent
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Collected annual rent
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Other annual income
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Operating costs
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Mortgage cost
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Net annual income
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Conservative
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monthly cash flow
Current
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monthly cash flow
Optimistic
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monthly cash flow

Enter rent, annual costs and financing to estimate monthly cash flow and actual property return.

Operating costs
Mortgage
Net income
Scenario Monthly cash flow Net annual Net yield CoC return
Year Collected rent Total costs Net annual Monthly cash flow

What this calculator does

This calculator estimates rental property cash flow after vacancy, operating costs and financing. It shows monthly cash flow, annual profit, net yield and cash-on-cash return, which makes it useful both for screening deals and for testing live portfolio assumptions.

Core formulas

Collected annual rent = monthly rent ร— occupied months + other income ร— 12

Net annual income = collected annual rent โˆ’ operating costs โˆ’ mortgage if included

Monthly cash flow = net annual income รท 12

Why cash flow matters

Yield can look attractive while monthly cash flow remains weak after financing. This calculator keeps both layers visible, so the property can be judged as an asset and as a cash-producing holding at the same time.

How to use it properly

Use realistic occupancy and cost assumptions. If you want a pure operating view, exclude mortgage. If you want an owner cash flow view, include mortgage. The most useful outputs are monthly cash flow, net annual income and cash-on-cash return together.

Frequently asked questions

Monthly cash flow is net annual income divided by 12 after vacancy, operating costs and optional mortgage payments.
Include mortgage for owner-level cash flow. Exclude it for a cleaner property operating return view.
Because leverage, vacancy or heavy operating costs can compress monthly free cash even if the property looks acceptable on gross income.
It is annual net income divided by the actual cash invested in the deal, often the most relevant metric for leveraged property investors.
Because rent growth and cost inflation change long-term cash flow quality. A deal that is tight in year one can improve or deteriorate later.
No. It is a focused cash flow and return tool, not a full acquisition, tax or disposition model.
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Cash Flow Calculator Report
Monthly cash flow
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Net annual income
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Net yield
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Cash-on-cash return
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Property valueโ‚ฌ0
Cash investedโ‚ฌ0
Collected annual rentโ‚ฌ0
Total annual costsโ‚ฌ0
Vacancy lossโ‚ฌ0
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