A commercial property is Owner Occupied when your business operates out of it, when you personally live in a residential unit inside it, or when it is leased to a related entity you majority own or control — and, in every one of those cases, when you use 50% or more of the property's net rentable area. It is an Investor property when at least 50% of its effective gross income is generated by arm's-length, third-party tenants, or when it is one of a few property types that are Investor regardless of who occupies them.
That one line decides the rest of the file: which coverage test the loan has to clear, which experience standard gets applied to you, which documents you get asked for, and — when occupancy is close to the line — whether underwriting agrees with the classification you submitted.
First, the disambiguation: this is not the residential "50% rule"
If you searched something like "50% rule commercial property," you may have landed on the residential investor heuristic — the rule of thumb that says half of a rental's gross income will be eaten by operating expenses. That is an expense-ratio guess used to screen small rental houses. It has nothing to do with what is on this page.
The 50% figures below are occupancy and income-source tests. They are not estimates or rules of thumb. They are classification thresholds in an underwriting guideline, and they determine which set of rules your loan is underwritten against. One is measured in square feet of net rentable area. The other is measured in effective gross income attributable to unrelated tenants. Neither one is about your expenses.
The three ways a property qualifies as Owner Occupied
There is more than one route in, and borrowers regularly assume there is only one.
The third route is the one people miss. A very common small-balance structure is a holding LLC that owns the building and leases it to an operating company under common ownership. That is not a landlord-tenant relationship for classification purposes. If the tenant entity is majority owned or controlled by the borrower, the space it occupies counts as owner occupancy — not as third-party tenant income.
The second route matters for mixed-use. If you are a natural person and you live in a residential unit at the subject property, the property can be Owner Occupied on that basis alone. It also triggers additional requirements, covered further down, and in some states and property configurations it makes the borrower ineligible entirely.
The 50% net rentable area threshold
Qualifying under one of the three routes is necessary but not sufficient. There is a quantity test on top of it.
Net rentable area is the measurement the guideline defines as the floor area of a building that may be leased to tenants and upon which the rental rate is computed. It is a square-footage measure — not a rent measure, not a headcount, not a share of the parcel.
Two practical consequences follow.
First, the test is on your side of the ledger. A 10,000-square-foot building where your business occupies 4,800 square feet and two unrelated tenants occupy 5,200 is not Owner Occupied, even if your business generates most of the economic activity at the site and pays most of the bills.
Ground-floor-retail-plus-leased-upstairs buildings surprise people most often, because the owner's business feels dominant. The measurement does not care how it feels.
Second, note the verb in the last sentence of that rule: underwriting may classify the property as an investment property when the threshold is not met. That is written as discretion, not automation. But you should plan around the outcome, not the discretion — if you are under 50%, assume the Investor track and be pleasantly surprised if you aren't.
The Investor definition and the effective gross income test
The Investor test runs on income, not square footage — a deliberate asymmetry that is worth understanding, because it means the two definitions are measured in different units and a property can look close to the line on one measure and clearly over it on the other.
Two words carry the weight. Arm's-length excludes leases to related entities — the holding-company-to-operating-company structure above does not produce arm's-length tenant income. Effective gross income is defined in the guideline as rental income produced by the property plus miscellaneous income, less vacancy, collection losses and concessions. It is not gross scheduled rent, and it is not net operating income.
Property types that are Investor no matter what
The second half of that rule is the part that overrides everything else. Multifamily, Manufactured Housing Parks, 1–4 unit residential, and PUDs are Investor properties regardless of occupancy. You can live in a unit in your own five-unit apartment building and it is still an Investor property under this program. The occupancy analysis does not get run; the property type settles it.
What the classification actually costs you
This is the part most borrowers are really asking about. Here is the practical downstream comparison.
| Owner Occupied | Investor | |
|---|---|---|
| Underwriting method | Global DSC | Property DSCR |
| Required coverage | 1.20x | 1.15x |
| Max LTV, purchase | 80% for loans with ≥725 FICO | 80% for loans with ≥725 FICO |
| Max LTV, cash-out / refinance | 75% | 75% |
| Occupancy requirement | 75% | 75% |
| Experience standard applied | Business experience in the same business or industry | Property ownership and management experience |
| Rent roll required | Only if multi-tenant | Yes |
| Executed commercial leases | Not required if the property is owner occupied | Yes |
| Business P&L / returns for the operating business | Yes | Not applicable under Investor Complete or Lite Doc |
The coverage number is the headline, but the method is the bigger difference. On an Owner Occupied file we run Global Debt Service Coverage: total annual global net operating income measured against 50% of total annual personal, business, and subject-property debt obligations. On an income-producing property we run a property-level DSCR: underwritten net operating income over annual debt service coverage payments.
That means an Owner Occupied file pulls your personal and business debts into the calculation. An Investor file, in the ordinary case, is judged on the property's own numbers. Borrowers with strong buildings and heavy personal debt sometimes fare better as Investor; borrowers with a thin-margin building and clean personal balance sheets often fare better as Owner Occupied. Neither classification is universally cheaper, which is exactly why guessing is expensive.
The experience standard changes too
The two classifications are graded against completely different histories.
On Owner Occupied files, experience means business experience: ownership, operational, or employment experience in the same business or industry immediately preceding the loan application. Less than three years is treated as inexperienced and caps LTV at 70%; three years or more opens the program maximum. And the primary source of income used to qualify must be generated by the business occupying the subject property, though other recurring and verifiable income may also be considered.
On Investor files, experience means real estate experience. A borrower or primary guarantor who has owned at least one property — primary residence or investment — for a minimum of 12 months, but who does not meet the experienced criteria, is Inexperienced and capped at 70% LTV. Experienced status requires either owning and managing commercial or non-owner-occupied residential real estate for at least 12 consecutive months within the most recent three years, or having owned three or more investment properties, each for at least 12 months, during the previous 24 months. Owning your own home does not count toward experienced investor status.
The appraiser's role in the determination
Borrowers often assume occupancy classification is a self-reported item on the application. It is not the last word.
Read that as substance over paperwork. The appraiser looks at who actually uses the space, who controls it, and who takes the economic benefit — and the three flagged circumstances are exactly where a formal lease can make a property look tenanted when affiliated ownership is really using it.
The practical effect runs both directions. A property you presented as an Investor deal, with a "lease" to a business your brother-in-law runs, may come back classified owner occupied. And a property you presented as owner occupied may not survive the square-footage measurement. Either way, the Commercial Real Estate Summary in the file has to document the actual percentage of owner occupancy, and that number is what the file is underwritten against.
The partial owner-occupied rule
This is the single most useful line in the section, and it resolves the ambiguity that borrowers spend the most time on.
There is no hybrid classification and no proration. A property meeting the Investor definition stays Investor even though you occupy part of it. In exchange you get relief from the standard investor experience requirement — a business owner using part of their own building is not graded as a first-time landlord.
There is also a documentation trigger tied to partial occupancy that sits below the classification thresholds entirely.
Note that this is a documentation request, not a reclassification. At 25% affiliate occupancy or 25% of rental income, the property is still an Investor property — but the operating business inside it becomes relevant enough to underwrite. It is an or test, so hitting either measure is enough.
When you live in a residential unit at the property
Personal residence at the subject property is one of the three routes to Owner Occupied status, and it carries the most extra requirements of the three.
The worksheet's purpose is in its name: confirming the loan is genuinely commercial-purpose rather than consumer-purpose. It is a compliance step, not a credit one, and it applies whenever a borrower lives in a unit at the property.
When the property is listed for sale
An owner-occupied property that is actively on the market gets a specific set of conditions, because the occupancy the file is built on may be temporary.
Two things to take from this. The listing does not automatically kill the loan — but it does have to be disclosed, documented, and addressed by the appraisal, and underwriting may require you to pull it before closing. And the escalation clause is aimed squarely at contradiction: certifying intent to occupy while an active listing markets the building as vacant-on-close is the kind of inconsistency that ends files.
Which one are you, in order
Work the test in this sequence, because the steps override each other:
1. Is it Multifamily, an MHP, a 1–4 unit residential property, or a PUD? If yes, it is Investor regardless of occupancy, and you can stop.
2. Do you meet one of the three owner-occupancy routes — your business operates there, you live in a residential unit there, or it is leased to an entity you majority own or control?
3. If yes, do you use 50% or more of the net rentable area? Measure square feet, and count affiliate-occupied space on your side. Under 50%, plan on Investor.
4. If no, does at least 50% of effective gross income come from arm's-length third-party tenants? If yes, Investor.
5. Does an affiliated business occupy 25% or more of the rentable square footage, or contribute 25% or more of the rental income? If yes, expect to document that business regardless of how the property classified.
Then check the overlays: living at the property adds a worksheet and may make you ineligible outright in some states and unit counts, an active listing adds four conditions, and a restaurant, bar, or daycare adds an operating-history requirement that applies whether the business is yours or your tenant's.
What this page does not do
This page explains how a property is classified as Owner Occupied or Investor and what changes downstream. It does not:
- Price your loan. Rate and pricing come from the current pricing matrix, not from this classification section. Classification affects which coverage test and which LTV ceiling apply; it is not, by itself, a rate quote.
- Cover the full underwriting file. Credit, environmental, appraisal age, property condition, entity structure, state eligibility, and asset seasoning all sit outside this section and can each be decisive on their own.
- Promise an outcome at the threshold. The guideline says underwriting may classify a property as an investment property when owner occupancy falls short of 50%, and that appraisers may classify a property as owner occupied on use, control, and economic benefit. Those are discretionary. We have preserved the hedging because the guideline uses it.
- Give you a partial or blended classification. There isn't one. Partial borrower occupancy on a property that otherwise meets the Investor definition stays Investor.
- Replace a scenario review. If your occupancy is near 50%, your tenant is a related entity, or you live in a unit at the property, the answer depends on measurements and documents we would need to see. Run the scenario rather than guessing.
Guideline SBC 08/03/2026 · Reviewed August 30, 2026
Published August 31, 2026 · Updated August 31, 2026
How to use this guide
This article is educational guidance, not an offer or commitment to lend. Rules, property facts, credit, leverage, documentation, and full underwriting still control any actual scenario.