Owner-Occupied Real Estate · 2026

SBA 504 vs the Conventional Commercial Mortgage

SBA 504 buys an owner-occupied building with 10% down and a 25-year fixed debenture near 6.5% to 7.25% with no balloon. A conventional commercial mortgage needs 20% to 35% down at 7.5% to 9% and usually carries a 5-to-10-year balloon. Below the 51% owner-occupancy line, 504 is off the table. On a deadline, conventional is usually the only door that closes in time. Everywhere in between, the decision turns on cash, rate certainty, and how long you will hold the property.

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Bottom line

Choose SBA 504 when you will occupy at least 51% of the building and want to keep cash in the business: 10% down, a 25-year fixed debenture near 6.5% to 7.25%, and no balloon. Choose a conventional commercial mortgage when you must close inside 45 days, the property is partly leased, you exceed the SBA size standard, or you have the cash and prefer one simpler loan. On a $1.5 million building, 504 preserves roughly $225,000 of cash up front; conventional gives a lower monthly payment but a year-10 balloon to refinance.

Two notes versus one. Different down payment, different balloon, different speed.

The instinct on a building purchase is to chase the lowest rate, and the SBA 504 debenture near 6.95% looks like it has to beat a conventional mortgage at 8%. On the rate alone it does. On the monthly payment it often does not, because the 504 finances 90% of the building while a conventional loan finances 75%. The lower rate sits on more principal. What the 504 actually buys you is two different things: cash kept in the business, and a fixed rate locked for 25 years on 40% of the deal with no balloon.

An SBA 504 loan is two notes on one project. A bank funds 50% as a conventional first mortgage. A Certified Development Company, an SBA-licensed nonprofit, funds 40% as a fixed-rate debenture in second position. You put down 10%. The bank piece prices like any commercial loan; the debenture prices off the monthly bond pool that funds every 504 loan closing that month, which is how it carries a fixed rate for 25 years. The blended cost across both notes usually lands near or slightly below a single conventional rate, and the 10% down is the lowest equity injection in commercial real estate lending.

A conventional commercial mortgage is one loan from one lender, and its defining features are a larger down payment and a balloon. Expect 20% to 35% down and a rate of 7.5% to 9% fixed for 5 to 10 years, after which the full remaining balance comes due and you refinance into the rate environment of that year. The single-lender structure closes faster, carries lighter paperwork, and skips the SBA's occupancy rules and size standards. Those are real advantages when you need speed, when the building is partly leased, or when you have the cash and plan a short hold.

Three questions decide it. First, will your business occupy at least 51% of the building? If not, 504 is off the table and conventional is the only door. Second, how long will you hold the property, and does keeping cash in the business matter? A long hold and a tight cash position both favor the 504's low down payment and no-balloon debenture. Third, is there a deadline? A seller clock, an auction, or a 1031 exchange that demands closing inside 45 days rules out the 60-to-90-day 504 timeline before anything else gets weighed.

How the two loans compare

Twelve dimensions where the SBA 504 loan and a conventional commercial mortgage diverge on the same owner-occupied building. The structural differences explain most of the down payment, balloon, and eligibility gaps on a given deal.

SBA 504
Conventional Mortgage
Loan structure and lenders
Two loans on one project. A bank or non-bank lender funds 50% of the project cost as a conventional first mortgage in first-lien position. A Certified Development Company, an SBA-licensed nonprofit, funds 40% as a fixed-rate SBA debenture in second position. You put down 10%. The two notes close together and amortize on parallel schedules. Roughly 200 active CDCs operate nationwide, each with a defined geographic territory.
One loan, one lender, one lien. A bank, credit union, or non-bank commercial lender funds the whole mortgage in first position and holds a security interest in the property until payoff. No CDC, no SBA approval layer, no second note to coordinate. The single-lender structure is what makes a conventional close faster and the paperwork lighter, and it is also what pushes the larger down payment and the balloon risk onto the borrower.
Down payment / equity injection
10% on a standard owner-occupied purchase. 15% when the property is special-purpose (hotels, restaurants, gas stations, self-storage, car washes) or the business is under two years old, and 20% when both conditions apply. The low equity requirement is the program's headline advantage and the single biggest reason an operator picks 504 over a bank mortgage on the same building.
20% to 35% down depending on the lender, property type, and file strength. Owner-occupied office and retail on a strong file run 20% to 25%; special-purpose properties and weaker files run 30% to 35%. On a $1.5 million building, the gap between 504 at 10% and conventional at 25% is $225,000 of cash that stays in the operating account instead of going to closing.
Rate structure and headline pricing
The 40% SBA debenture carries a fixed rate for the full life of the note, near 6.5% to 7.25% in early-to-mid 2026, set when the monthly debenture pool prices in the public bond market. The 50% bank first mortgage is priced separately, often 7.25% to 8.5%, sometimes fixed for the full term and sometimes fixed for 5 to 10 years with a reset. The blended rate across both notes typically lands near or slightly below a single conventional rate.
A single rate on the whole loan, usually 7.5% to 9% on owner-occupied commercial real estate in mid-2026, set off the lender's cost of funds plus a spread. Some banks fix the rate for the full term; most fix it for 5 to 10 years and reset to a market index at the balloon. The rate looks simpler than the 504 stack, but the reset clause is where the real long-term cost lives.
Term, amortization, and balloon
The SBA debenture fully amortizes over 25 years (or 20, or 10, by project) at the fixed rate with no balloon. The bank first mortgage usually matches the 25-year amortization, though some banks structure their 50% piece on a 10-year term with a balloon. On the 40% that is SBA debenture, the rate is locked and the loan self-liquidates. That no-balloon certainty on nearly half the deal is the structural hedge against a higher-rate decade.
Almost always a balloon. The standard owner-occupied commercial mortgage amortizes over 20 to 25 years but carries a 5-to-10-year term, at which point the full remaining balance comes due and you refinance into whatever the rate environment looks like that year. A $1.125 million loan on a 25-year amortization still owes roughly $900,000 at a year-10 balloon. Refinance risk is the conventional structure's defining cost.
Eligibility and owner-occupancy
Strict. The business must occupy at least 51% of an existing building, or 60% of new construction with a plan to occupy 80% over time. The borrower must be a for-profit operating company under the SBA size standard (tangible net worth under $20 million and average net income under $6.5 million over the prior two years). Passive real estate, investment property, and majority-leased buildings are categorically ineligible.
Flexible. A conventional commercial mortgage can fund owner-occupied, partly-leased, or pure investment property. There is no occupancy floor, no SBA size standard, and no for-profit operating-company test. A building that is 40% owner-occupied and 60% leased to tenants, which the 504 program rules out at intake, is a routine conventional file. The eligibility breadth is the conventional loan's clearest structural advantage.
Loan size and project cap
The SBA debenture caps at $5 million ($5.5 million for manufacturers and certain energy-efficient projects). Because the debenture is only 40% of the project, the total project can run to $12.5 million or more once the bank's 50% first mortgage is layered on. There is a real ceiling, but it sits well above where most owner-occupied real estate deals actually live.
No program cap. The conventional lender sets the maximum by its own appetite, the appraised value, and the loan-to-value it will carry. Deals from a few hundred thousand dollars to tens of millions all run through the same conventional channel. On very large projects or very small ones, conventional is sometimes the only product that fits at all.
Use of proceeds
Purpose-restricted to owner-occupied commercial real estate, ground-up construction, building renovation and expansion, and long-life fixed equipment with a 10-plus year useful life installed in the property. Working capital, inventory, payroll, and general operating expenses are categorically ineligible. The narrow use is the price of the favorable terms.
Flexible within real estate. A conventional commercial mortgage can fund a purchase, a rate-and-term refinance, a cash-out refinance for business use, or a construction-to-permanent structure, and the lender is free to let the proceeds cover related costs the 504 program excludes. The flexibility on cash-out is a genuine advantage when the building has equity you want to pull for the operating side.
Time from application to close
60 to 90 days, sometimes past 120 on special-purpose properties or large debentures. Two underwriting tracks run in parallel: the bank reviews its 50% first mortgage while the CDC underwrites the 40% debenture and presents the project to the SBA for approval. Both must clear before closing. Environmental review, the appraisal, and the CDC's job-creation or community-development analysis all sit on the critical path.
30 to 60 days on a clean file at a relationship bank, occasionally faster at a portfolio lender that holds the loan rather than selling it. One underwriting track, one approval, no SBA layer. When a seller deadline, a foreclosure auction, or a 1031 exchange clock is the binding constraint, the conventional timeline is frequently the deciding factor.
Fees and closing costs
The SBA portion carries a CDC processing fee of roughly 1.5% of the debenture, an SBA guaranty fee, and small ongoing servicing fees, most of which finance into the loan rather than coming out of pocket. The bank charges its own origination on the 50% piece. Total financeable fees on the SBA side typically run 2.5% to 3% of the debenture, structured so they do not drain closing cash.
Origination of 0.5% to 1.5% of the loan, plus a commercial appraisal ($2,000 to $10,000), an environmental Phase I ($2,000 to $5,000), title, legal, and sometimes a lender processing fee. The fee load is lighter than the 504 stack on paper, but it generally comes out of pocket at closing rather than financing into the loan.
Prepayment penalty
The SBA debenture carries a declining prepayment penalty over the first 10 years of a 25-year note, structured into the bond. After year 10 the debenture prepays free. The bank first mortgage sets its own prepayment terms independently. The penalty is predictable and disclosed up front rather than a surprise at payoff.
Lender-set, and often steeper than the 504 schedule. Common structures include step-down penalties (5% declining to 1% over five years), yield maintenance, or defeasance on securitized loans, the last of which is expensive and complex to execute. If you expect to sell or refinance the property inside the term, the conventional prepayment terms deserve a close read before signing.
Personal guaranty and recourse
Required. Every owner of 20% or more signs an unlimited personal guaranty on the SBA debenture, and the bank typically requires the same on its 50% piece. The 504 program is full-recourse by design. The federal backing lowers the rate; the personal guaranty is part of what the borrower trades for it.
Usually recourse with a personal guaranty, though the terms are negotiable in a way the SBA's are not. Strong borrowers at low loan-to-value occasionally secure non-recourse or burn-off recourse, a guaranty that drops away once the loan seasons and hits a coverage target. The negotiating room on recourse is a quiet conventional advantage for well-capitalized buyers.
Refinancing existing real estate debt
Eligible through the 504 Refinance program, made permanent in 2024. The conventional debt being refinanced must be at least two years old, used substantially for 504-eligible purposes, and currently performing. Borrowers can fold in up to 20% expansion costs and take limited cash-out, capped at 20% of appraised value, for business expenses. The same 50/40/10 split applies.
Refinancing is the conventional channel's native strength. Rate-and-term refinances, cash-out refinances for nearly any business or investment purpose, and refinances of investment property all run without the 504 program's eligibility tests. When the goal is pulling equity out for general use, or refinancing a building that does not meet 51% occupancy, conventional is the only door.

When SBA 504 wins

You will occupy a majority of the building, you plan to hold it, keeping cash matters, the property is special-purpose, or a 25-year fixed rate with no balloon is worth waiting 60 to 90 days for.

  • You will occupy at least 51% of the building, you plan to hold it long-term, and keeping cash in the business matters more than the lowest monthly payment. The 10%-down structure leaves $150,000 to $375,000 more working capital on a $1.5 million-to-$2.5 million purchase than a conventional 25%-to-35% down deal.
  • You want rate certainty. The 40% SBA debenture locks a fixed rate for 25 years with no balloon, so on nearly half the project your payment does not move regardless of where Prime sits in 2032 or 2036. On a building you intend to own for two decades, eliminating refinance risk on that portion is worth more than a slightly lower opening monthly payment.
  • The property is special-purpose (restaurant, hotel, self-storage, car wash, medical facility) where conventional lenders push the down payment to 30% to 35% and shorten the term. The 504 program holds at 15% down on special-purpose property, a gap that frees real cash on exactly the deals where conventional terms are harshest.
  • The project bundles ground-up construction, renovation, or expansion, or long-life fixed equipment installed in the building. The 504 program funds all of these inside one structure at the fixed debenture rate, and the construction-to-permanent path is well-trodden through the CDC.
  • You comfortably clear the SBA size standard (tangible net worth under $20 million, average net income under $6.5 million) and the 60-to-90-day timeline is workable because the purchase is planned rather than racing a deadline. Patience is the price of admission, and a planned owner-occupied purchase usually has the runway to pay it.
  • Total interest over a full 25-year hold matters more than the opening monthly payment. The blended rate across the bank first mortgage and the fixed debenture typically lands at or below a single conventional mortgage rate, and on a held-to-term building that rate advantage compounds even though the 504 finances more of the purchase price.

When a conventional mortgage wins

Speed binds the deal, the building is partly leased or investment, you exceed the SBA size standard, you want cash-out flexibility, or you have the cash and prefer one simpler loan.

  • Speed is the binding constraint. A seller deadline, a foreclosure auction, or a 1031 exchange clock that demands closing inside 45 days rules out the 60-to-90-day 504 timeline before rate even enters the conversation. The conventional channel closes in 30 to 60 days on a clean file and faster at a portfolio lender.
  • The building is partly leased or pure investment. Anything below 51% owner-occupancy is ineligible for 504 at intake. A mixed-use property where your business fills 40% and tenants fill 60% is a routine conventional file and an automatic 504 decline.
  • You exceed the SBA size standard. A business with tangible net worth above $20 million or average net income above $6.5 million over the prior two years does not qualify for the 504 program at all, and conventional is the only commercial real estate door open.
  • You have the cash and want a single, simpler loan. A buyer putting 30% down on a building they plan to sell or refinance within seven years often prefers one note, one lender, and no SBA fees, occupancy rules, or annual reporting, even at a higher headline rate. The simplicity has real value when the hold is short.
  • You want cash-out beyond owner-occupied business use. A conventional cash-out refinance can pull equity for any purpose the lender allows, including investment, where the 504 refinance program caps cash-out at 20% of appraised value and restricts it to business expenses.
  • Your relationship bank offers competitive portfolio terms. A community or regional bank that holds the loan on its own books can sometimes beat the 504 blended rate, add an interest-only period, or negotiate burn-off recourse in a way the SBA's standardized program cannot. When the bank relationship is strong, that offer deserves a real look before defaulting to 504.

Three building purchases, three different answers

Generic buyer profiles based on how each loan gets used in practice. Numbers are illustrative and the arithmetic is yours to re-run. Your actual offers depend on the lender, the property, the credit profile, and current SBA program parameters.

Established service business buying its $1,500,000 office and warehouse

Setup: A 9-year-old commercial HVAC contractor in the Southeast, $4.1 million annual revenue, $620,000 net income, 720 FICO on the majority owner, clean two-year tax returns. The business currently leases its 14,000-square-foot office and warehouse, and the landlord is selling the building for $1,500,000. The business will occupy 100% of the space. The owner has roughly $500,000 of deployable cash and would rather keep most of it in the operating account for equipment and payroll.

SBA 504 path

SBA 504 at 10% down ($150,000). The structure is a $750,000 bank first mortgage at 7.5% fixed for 25 years, plus a $600,000 SBA debenture at 6.95% fixed for 25 years, both fully amortizing. Combined monthly payment is about $10,260. CDC and SBA fees near 2.75% of the debenture finance into the loan rather than draining closing cash. Closes in about 75 days. The owner keeps $350,000 of the $500,000 cash position working in the business.

Conventional mortgage path

Conventional owner-occupied mortgage at 25% down ($375,000). A $1,125,000 loan at 8.0%, amortized over 25 years with a 10-year balloon, runs about $8,680 a month. Closes in about 40 days. The lower monthly is real, but the owner writes a $375,000 check at closing, leaving only $125,000 in the business, and faces a roughly $900,000 balloon at year 10 that must be refinanced at whatever rate the market offers in 2036.

Verdict

It depends on the hold and the cash. The conventional monthly is about $1,580 lower, which is genuine money, and the faster close is a mild plus on a non-urgent purchase. The 504 wins on the two things this owner said matter: it preserves $225,000 more cash up front, and it locks the rate on 40% of the deal for 25 years with no balloon. For a contractor who intends to own this building for two decades and values working capital, 504 is the better fit despite the higher payment. Flip the facts to a buyer planning to sell in six years with cash to spare, and the conventional loan's lower payment and lighter structure win instead.

Retail owner buying an $850,000 mixed-use building on a 1031 deadline

Setup: A boutique fitness studio owner in the Mountain West sells an investment condo and rolls the gain into an $850,000 mixed-use building through a 1031 exchange. The studio will occupy the 3,000-square-foot ground floor, about 45% of the building, while two existing residential tenants occupy the upper floors under leases with 14 months remaining. The 1031 clock requires closing inside the 180-day window, and the identified-property deadline is already 50 days in.

SBA 504 path

Not eligible. The 504 program requires the business to occupy at least 51% of an existing building, and at 45% owner-occupancy this property fails the test at intake regardless of credit or cash. Even if the occupancy cleared, the 60-to-90-day 504 timeline would put the close at risk against the remaining 1031 window.

Conventional mortgage path

Conventional mixed-use commercial mortgage at 30% down ($255,000) on the partly-leased building, with the tenant income actually helping the debt-service-coverage math. A $595,000 loan at 8.25% over a 25-year amortization with a 7-year balloon runs about $4,690 a month before tenant rent is applied. Closes in about 35 days, inside the 1031 window.

Verdict

Conventional wins by default and by design. The 504 program is simply not available on a 45%-occupied building, and the 1031 deadline rules out the slower timeline even in the abstract. This is the cleanest case in the comparison: when the property is majority-leased or the calendar is tight, the conventional channel is not the cheaper option, it is the only option. The tenant rent that disqualifies the building from 504 is the same rent that strengthens the conventional file.

Growing manufacturer buying a $2,600,000 production facility

Setup: An 11-year-old specialty food manufacturer in the Midwest, $7.8 million annual revenue, 695 FICO on the owner, clean financials, expanding out of a leased facility into a $2,600,000 building it will fully occupy and outfit with production lines. The property reads as special-purpose to appraisers because of the food-grade buildout. The business is growing fast and wants every dollar of cash deployed in inventory and new hires for the expansion, not parked in a down payment.

SBA 504 path

SBA 504 at 15% down on the special-purpose property ($390,000). The structure is a $1,300,000 bank first mortgage at 7.75% fixed, plus a $910,000 SBA debenture at 6.95% fixed for 25 years; a manufacturer qualifies for the higher $5.5 million debenture cap, well above this need. Combined monthly is roughly $16,100. Long-life production equipment installed in the building can fold into the same 504 structure. Closes in about 90 days. The 25-year fixed debenture removes refinance risk on 41% of a $2.6 million commitment.

Conventional mortgage path

Conventional commercial mortgage at 35% down on the special-purpose property ($910,000), the steeper equity that conventional lenders attach to food-grade and other single-use buildings. A $1,690,000 loan at 8.75% over a 25-year amortization with a 7-year balloon runs about $13,900 a month. Closes in about 50 days, but the $910,000 down payment pulls more than half the company's deployable cash out of an expansion that needs it, and the year-7 balloon re-prices the whole loan in 2033.

Verdict

504 wins decisively. The down-payment gap alone is $520,000 of cash the manufacturer keeps in the business for the expansion that justified buying the building. The special-purpose property is exactly the case where conventional terms turn harshest (35% down, shorter balloon) and where the 504 program's 15%-down structure is most valuable. The conventional monthly is about $2,200 lower, but on a cash-tight growth-stage company funding inventory and hiring, $520,000 of preserved capital and a no-balloon fixed rate on 41% of the deal are worth far more than the payment difference. The only real cost is the 90-day timeline, which a planned expansion can absorb.

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Frequently asked questions

Is the SBA 504 rate actually lower than a conventional commercial mortgage?

On the debenture portion, yes; on a blended, all-in basis, it is closer than it looks. The 40% SBA debenture carries a fixed rate near 6.5% to 7.25% in 2026, below a typical conventional owner-occupied rate of 7.5% to 9%. But the 504 finances 90% of the building to conventional's 75%, so the lower rate sits on more principal. The 504's real edge is not a lower monthly payment, which is often higher, but the 10%-down cash preservation and the 25-year fixed, no-balloon structure on the debenture.

How much do I have to put down on an SBA 504 versus a conventional mortgage?

SBA 504 requires 10% down on a standard owner-occupied purchase, 15% on special-purpose property or for a business under two years old, and 20% when both apply. A conventional commercial mortgage requires 20% to 35% down depending on the lender and property type. On a $1.5 million building, that gap runs $150,000 to $375,000 of cash, and it is the single biggest reason owner-occupiers choose 504 over a bank mortgage on the same property.

Can I use an SBA 504 loan for a rental or investment property?

No. The 504 program requires your business to occupy at least 51% of an existing building (60% of new construction). Passive real estate, pure investment property, and majority-leased buildings are ineligible at intake. If your business will occupy less than 51% of the space, or you are buying purely to lease the property out, a conventional commercial mortgage is the only route. The owner-occupancy rule is the hard line between the two products.

What happens at the end of the term? Is there a balloon payment?

This is the structural difference most buyers miss. The 40% SBA debenture fully amortizes over 25 years at a fixed rate with no balloon, so that portion self-liquidates and never re-prices. A conventional commercial mortgage almost always carries a balloon: it amortizes over 20 to 25 years, but the full balance comes due at a 5-to-10-year term, forcing a refinance at whatever rate prevails that year. On a long hold, the 504's no-balloon debenture is a real hedge against a higher-rate decade.

How long does an SBA 504 loan take to close compared to conventional?

SBA 504 runs 60 to 90 days, sometimes past 120 on special-purpose or large projects, because the bank and the CDC underwrite their portions in parallel and both must clear before closing. A conventional commercial mortgage closes in 30 to 60 days on a clean file. The 30-to-60-day gap is why a seller deadline, an auction, or a 1031 exchange clock often pushes a buyer to conventional, even when the 504 terms would be better on a patient timeline.

Can I refinance an existing commercial mortgage with an SBA 504 loan?

Yes, through the 504 Refinance program, made permanent in 2024. The existing conventional debt must be at least two years old, used substantially for 504-eligible purposes (owner-occupied real estate or long-life equipment), and currently performing. You can fold in up to 20% expansion costs and take limited cash-out, capped at 20% of appraised value, for business expenses. For cash-out beyond that, or to refinance investment property, a conventional refinance is the better fit.

Quick Loans Direct is a lending marketplace, not a direct lender. Actual rates, down payment requirements, amortization terms, and approval decisions on SBA 504 and conventional commercial mortgages are made by our lending partners and SBA Certified Development Companies based on their individual underwriting criteria, the property profile, and your business file. Rates and terms may vary by state. California, New York, Virginia, Utah, Georgia, Connecticut, Florida, Kansas, and several other states require specific commercial-financing disclosures that your chosen lender will furnish.

SBA 504 program terms referenced above (the 50/40/10 structure, debenture rates, down payment tiers, owner-occupancy rules, size standards, and the 504 Refinance program) reflect the SBA 504 authority as of mid-2026. Debenture rates, fees, and eligibility are set by SBA notice and change month to month; current program parameters are published at sba.gov. Confirm structure on any specific project with an SBA Certified Development Company before relying on the figures here.

The cost scenarios above use illustrative rates and round figures to show how the structures behave. They are not quotes. Commercial mortgage rates, balloon terms, and down payment requirements vary by lender, property type, loan-to-value, and your business's qualifications, and they change with the rate environment.

This content is for informational purposes only and does not constitute financial, tax, or legal advice. Consult a qualified professional before making business real estate financing decisions. Last reviewed by the Quick Loans Direct editorial team on June 2026.