Money Tools

Rental Property Cash Flow Calculator

Estimate monthly cash flow from a rental property after common operating costs and financing.

Updated April 16, 2026
Free online tool
Planning and research use

Why this page exists

Rental math gets more useful when rent and common monthly costs are turned into one cash-flow estimate instead of being reviewed as scattered line items. This calculator helps visitors estimate monthly rental-property cash flow from income, financing, and recurring expense assumptions.

Interactive tool

Run the estimate

Enter your numbers and read the result first, then use the sections below to understand what affects the outcome.

Calculator

Rental property cash flow calculator

Estimate monthly cash flow from rental income after common operating costs and financing.

Result

$200.00

Estimated monthly rental cash flow based on monthly income minus the common monthly costs entered.

Estimated monthly cash flow$200.00

Total monthly income used$2,400.00

Total monthly expenses used$2,200.00

Annualized cash flow$2,400.00

$2,400.00 of monthly rent against $2,200.00 of monthly costs gives an estimated monthly cash flow near $200.00.
Annualized, that works out to about $2,400.00 in this simple cash-flow view.
Use the result as a planning estimate only, because repairs, turnover, and rent shifts can all change the real outcome.

This is a planning estimate only. Repairs, turnover, vacancies, rent changes, and local market conditions can make real cash flow higher or lower than the simple monthly estimate.

Planning note

Last updated April 16, 2026. Use this tool to compare scenarios and plan ahead, then confirm important details with the lender, employer, insurer, contractor, or other qualified provider involved in the final decision.

How it works

What the calculator is doing

Enter monthly rent and the common monthly costs you want to include.

The calculator totals the expenses and subtracts them from monthly rent.

It shows estimated monthly cash flow, monthly income, monthly expenses, and annualized cash flow.

Understanding your result

This is a planning estimate only. It can help compare rental scenarios quickly, but real cash flow still depends on repairs, turnover, rent changes, local taxes, and how consistently the property stays occupied.

Browse more money tools

Examples

Ways people use this tool

Example scenarios help turn a quick estimate into a more useful comparison or planning step.

Check whether a property is cash-flow positive

A quick monthly estimate can help show whether rent is likely to clear the main recurring costs.

Test different maintenance or vacancy assumptions

Changing those allowances can show how sensitive the property is to less-than-perfect occupancy or repair months.

Use it with rental yield and financing tools

Cash-flow math often becomes more useful when reviewed alongside mortgage, rental-yield, and cash-on-cash return tools.

When to use it

Good times to run this calculator

Use this when you want a quick monthly rental-property cash-flow estimate before building a more detailed spreadsheet.

It is especially useful when comparing two properties or testing whether the deal still works with more conservative expense assumptions.

Assumptions and limitations

The estimate assumes the income and recurring monthly cost numbers entered are realistic for the same property and period.

It does not include every possible expense, such as major capital replacements, leasing costs, or one-time turnover work.

Common mistakes

Avoid the usual input mistakes

Ignoring maintenance and vacancy can make the property look much stronger than it will feel over a full year.

Treating a positive monthly estimate as guaranteed profit can hide the effect of repairs, rent gaps, or unexpected ownership costs.

Practical tips

Run one version with optimistic assumptions and one with more conservative allowances so you can compare the downside range.

Pair the result with rental-yield and cash-on-cash tools if you want to compare cash flow against property value or invested cash.

Worked example

Walk through a realistic scenario

A worked example shows how the estimate behaves when the inputs resemble a real planning decision.

Estimate monthly rental cash flow

Monthly rent is $2,400 and total monthly costs add up to $2,200 across mortgage, taxes, insurance, maintenance, vacancy, and HOA.

1. Enter $2,400 as monthly rent.

2. Enter each recurring monthly cost field.

3. Total the expenses and subtract them from rent to estimate monthly cash flow.

Takeaway: The result gives a quick sense of whether the property is generating a surplus or shortfall before deeper analysis.

FAQ

Common questions

How is rental cash flow estimated here?

The calculator subtracts the monthly expenses entered from monthly rent and shows the remaining cash flow.

Why include maintenance and vacancy allowances?

Because rental income often looks stronger on paper than it feels in practice if you ignore repairs, turnover, and time without rent coming in.

Is this a full investment analysis?

No. It is a simple planning estimate and does not replace a full review of financing, taxes, capital expenditures, or local market risk.

Related tools

Keep comparing

Rental-yield, cash-on-cash, and mortgage tools help show whether the monthly cash-flow estimate also makes sense relative to value and financing.

Property-tax and budgeting tools are useful when you want to pressure-test the monthly cost assumptions behind the result.

Money ToolsUpdated April 11, 2026