Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Breakeven unit count
47
Savings at your current unit count
$11,200
Estimated external management cost
$79,200
In-house PM fully-loaded cost
$68,000
In-house PM capacity utilization
55%
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How to use this
- 1Enter average monthly rent per unit ($).
- 2Enter external management fee (%).
- 3Enter in-house pm fully-loaded annual cost ($).
- 4Enter units one in-house pm can handle.
- 5Enter your current unit count.
- 6Read your breakeven unit count on the right — it updates as you type.
- 7Hit Share to keep the scenario or send it to someone.
About this calculator
At small scale, outsourcing to a third-party property manager is almost always cheaper than hiring your own staff, but as a portfolio grows there's a crossover point where the fixed cost of an in-house property manager or maintenance tech becomes cheaper per door than paying a percentage-based external fee on every unit. This calculator finds that crossover unit count given your average rent, the external management fee percentage, and the fully-loaded cost of the in-house role you'd hire, so you know roughly how many doors you need before building an internal team makes financial sense rather than just a lifestyle preference.
Worked example
Using the values the calculator loads with:
Inputs
- Average monthly rent per unit: 1500 $
- External management fee: 8 %
- In-house PM fully-loaded annual cost: 68000 $
- Units one in-house PM can handle: 100
- Your current unit count: 55
Results
- Breakeven unit count: 47
- Savings at your current unit count: $11,200
- Estimated external management cost: $79,200
- In-house PM fully-loaded cost: $68,000
- In-house PM capacity utilization: 55%
What each field means
Inputs
- Average monthly rent per unit ($)
- The average monthly rent per unit used in the calculation, measured in $. Starts at 1500 $ so you have a working example on load.
- External management fee (%)
- The external management fee used in the calculation, measured in %. Starts at 8 % so you have a working example on load. Accepted range: 0–20 %.
- In-house PM fully-loaded annual cost ($)
- The in-house pm fully-loaded annual cost used in the calculation, measured in $. Starts at 68000 $ so you have a working example on load.
- Units one in-house PM can handle
- The units one in-house pm can handle used in the calculation. Starts at 100 so you have a working example on load.
- Your current unit count
- The your current unit count used in the calculation. Starts at 55 so you have a working example on load.
Results
- Breakeven unit count
- Returned as a whole number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Savings at your current unit count
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Estimated external management cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- In-house PM fully-loaded cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- In-house PM capacity utilization
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
What counts as 'fully-loaded' salary cost?
Base salary plus payroll taxes, benefits, a vehicle or mileage allowance if they travel between properties, software and tools, and a share of office overhead. Fully-loaded cost typically runs 1.25-1.4x the base salary number, and using just base salary will understate the true breakeven point.
How many units can one property manager handle?
It varies by property type and how much leasing and maintenance coordination is centralized — single-family scattered-site portfolios often cap out around 75-125 units per manager due to travel time between properties, while a single large multifamily site can support 150-250+ units per on-site manager because everything is in one place.
Does going in-house eliminate all outside costs?
No — you'll likely still pay for leasing photography, background check services, accounting software, and possibly a maintenance coordinator or vendor network separately. In-house replaces the management fee layer, not every third-party service a management company bundles in.
What's the risk of going in-house too early?
Below the breakeven unit count, you're paying full fixed salary cost for a role that isn't fully utilized, and you take on employer liability, payroll administration, and the risk of that one person quitting with no backup — an external manager spreads that risk across their whole client base.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Portfolio Door Scaling Breakeven Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/portfolio-door-scaling-breakeven
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/portfolio-door-scaling-breakeven" target="_blank" rel="noopener">Portfolio Door Scaling Breakeven Calculator — RevenueLab</a> (2026).</p>
Source: [Portfolio Door Scaling Breakeven Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/portfolio-door-scaling-breakeven) (2026).