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NOI Calculator

Build net operating income from itemized expense lines instead of one lump sum, and see the expense ratio that lump sum was hiding. Shown before and after replacement reserves.

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Net operating income—
Effective gross income—
Management fee—
All other expenses—
Total operating expenses—
Operating expense ratio—
NOI after reserves—

Management is charged on collected income, not scheduled rent, so it falls when vacancy rises. That is why it is entered as a percentage here and everything else as a dollar figure.

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Frequently asked questions

Do capital reserves belong in NOI?

It depends who is asking, which is why this calculator shows both. Appraisers generally exclude a replacement reserve and treat capital spending below the NOI line. Lenders frequently underwrite one anyway — often $250 to $350 per unit per year — because roofs and HVAC are not optional. Use NOI before reserves to compare against market cap rates, and NOI after reserves to see what the asset really throws off.

Why is my expense ratio so different from the seller's?

Usually three lines. Management gets left out when the owner self-manages, so the labor is real but unpaid. Repairs get reported at a good year rather than a normal one. And reserves are absent entirely. Adding market-rate management alone often moves a small multifamily expense ratio by five to eight points.

Should the mortgage be in operating expenses?

No. Principal and interest sit below NOI, along with capital improvements, depreciation, and income tax. NOI describes the property; debt service describes your deal. Mixing them makes the asset impossible to compare against any other.

What expense ratio should I expect?

It moves with asset type, age, and who pays utilities. Rather than anchor on a rule of thumb, build the lines from actual bills and tax records, then compare the total against recent comparable sales in the same submarket.

General information, not tax or accounting advice. Your situation and current law (which changes) govern; confirm with a qualified advisor.

Disclosure

This calculator is provided for informational purposes only. Using it does not create a client relationship, and its output is not tax advice for your situation — it is a general model that cannot see your facts. Parikh Financial does provide tax services, under a written engagement, and nothing on this page is a substitute for that. We do not provide legal or investment advice, we are not a registered investment adviser, and we do not perform attest services. Use of this calculator is entirely at your own risk, and Parikh Financial assumes no liability for its use or for any reliance on its output. Parikh Financial does not guarantee the calculator’s accuracy or its applicability to your particular circumstances. It is provided “as is”, without warranty of any kind, whether express, implied, or statutory, including without limitation any warranty of merchantability, fitness for a particular purpose, title, or non-infringement. Some jurisdictions do not allow the exclusion of implied warranties, so these exclusions may not apply to you. Tax law changes frequently and any figures shown reflect published federal amounts as of the date of this page.

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