Finance category
Mortgage, loan, investing, tax, and money calculators.
Base Rent to NOI Calculator
Reliance on base rent varies by property type. This calculator sizes base rent's share of NOI.
Base rent / NOI
120.0%
Ancillary share
0.0%
Ancillary NOI
$0
How the math works
Ratio = base rent ÷ NOI. Ancillary = NOI − base rent.
Track ancillary income as ratio, not just dollars. Flat ancillary ratios during rent growth = lost revenue from neglected ancillary streams. Top operators grow both.
How to Use
- Enter base rent.
- Enter NOI.
- Read ratio and ancillary share.
Frequently Asked Questions
Healthy ratios?
Apartments: 80-90% base. Office: 70-85% (parking, storage). Retail: 65-80% (percentage rent). Hotels: 40-60% (F&B, ancillary). Lower = more diversified income.
Why matter?
High base rent ratio = simpler operations. Low ratio = operational complexity but higher upside. Underwriting buyers prefer predictable base-heavy income.
Trending?
Tracking base rent ratio over time flags NOI drift. Falling ratio = ancillary growing; check whether intentional. Rising ratio = ancillary shrinking; investigate why.
What documentation matters here?
Written leases, move-in/move-out inspections with photographs, ledger entries showing every payment and charge, served notices with proof of service, and contemporaneous emails or texts. Courts weigh written evidence heavily; informal understandings rarely stand. Institutional operators run a monthly file audit to catch gaps before they matter. Good paper trails recover most of what's owed.
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