Rental Income Calculator
Project net rental income after every operating cost and mortgage.
Please note: Estimates only, not investment or legal advice. Property markets, taxes, fees and lending rules vary by location and change over time. Verify figures with a qualified professional before committing.
What the Rental Income Calculator does
Net rental income is what actually reaches your bank account after vacancy, management, maintenance, insurance, tax and mortgage. Gross rent overstates the return dramatically — operating costs alone typically consume 30–50% of it.
Formula
Effective rent = Gross rent × (1 − Vacancy rate)Operating costs = Management + Maintenance + Insurance + Property tax + OtherNOI = Effective rent − Operating costsNet cash flow = NOI − Mortgage − Tax
Inputs explained
| Input | Unit | Required | Notes |
|---|---|---|---|
| Monthly rent | selected currency | Yes | Accepts more than 0. |
| Vacancy allowance | % | Yes | — |
| Monthly mortgage payment | selected currency | Optional | Accepts 0 or more. |
| Management fee | % | Optional | Percent of collected rent. |
| Monthly maintenance | selected currency | Optional | Accepts 0 or more. |
| Monthly insurance | selected currency | Optional | Accepts 0 or more. |
| Monthly property tax | selected currency | Optional | Accepts 0 or more. |
| Other monthly costs | selected currency | Optional | Accepts 0 or more. |
| Tax on rental profit | % | Optional | — |
| Currency | one of 10 options | Optional | — |
How to use it
- Choose Currency.
- Enter Monthly rent and Vacancy allowance.
- Optionally add Monthly mortgage payment, Management fee and Monthly maintenance.
- Select Calculate.
Worked example
$2,200 rent, 5% vacancy, $1,350 mortgage, 10% management, $180 maintenance, $95 insurance, $290 property tax.
- Rent
- 2200
- Vacancy
- 5
- Mortgage
- 1350
- Management
- 10
- Maintenance
- 180
Effective rent $2,090, operating costs $774, NOI $1,316 — net cash flow of −$34 a month before tax.
Frequently asked questions
What is the 50% rule?
A screening heuristic that operating costs, excluding mortgage, average around 50% of gross rent. If your estimate is far below that, you have probably forgotten something.
Should I self-manage to save the fee?
It saves 8–12% of rent but costs real time and exposes you to tenant issues directly. Model both, and be honest about whether you will actually do the work.