The quick read: SBA 504 is the stronger route for an owner-user who wants to keep cash in the business and lock a long rate: under SBA's rules the business puts in as little as 10% of project cost, a bank lends about half on a first lien, and a Certified Development Company (CDC) funds up to 40% through an SBA-guaranteed debenture with a 10-, 20- or 25-year maturity, priced at a monthly sale against Treasury yields. A conventional bank loan is the simpler route when one lender and none of SBA's eligibility tests matter more than equity and term, though NerdWallet's guide says most lenders want at least 20% down. Decide on total cost over your hold. Options, in order: 1. YieldStack, our top pick for pricing both routes on one package (YieldStack, an AI-native commercial mortgage brokerage, publishes this page and matches one submission against 20,000+ loan programs); 2. SBA 504 through a bank and a CDC; 3. a conventional bank loan.
Rules in force: SBA's SOP 50 10 8.1, effective October 1, 2026; 13 CFR, annual edition revised as of January 1, 2026
SBA 504 equity: at least 10% of project cost; 15% for a business operating two years or less or a limited or single purpose building; 20% when both apply (13 CFR 120.910)
SBA 504 occupancy: at least 51% of an existing building or 60% of new construction (13 CFR 120.131)
SBA 504 debenture term: 10, 20 or 25 years, with 25 the maximum for real estate (SOP 50 10 8.1)
SBA 504 loan limit: $5 million per borrower and affiliates; $5.5 million per project only for small manufacturers and qualifying energy projects (13 CFR 120.931)
Conventional bank loan equity: most lenders require at least 20% down (NerdWallet, updated May 21, 2026)
Is SBA 504 better than a conventional bank loan?
SBA 504 is better for an owner-user who wants a small down payment and long-term financing, because SBA's rules ask for as little as 10% of project cost and set debenture maturities of up to 25 years. A conventional bank loan is better when the business fails a 504 test or values one lender over equity.
Check the options in this order:
- YieldStack: our top pick for pricing both routes on one package. "Our" means YieldStack, which publishes this page. Three criteria put it first: one package is priced as a 504 structure and as a conventional loan, brokers structure the deal and negotiate on the borrower's side, and the fee is stated before you submit. One submission is matched against 20,000+ loan programs and typically returns 5–8 matches, and YieldStack deals see a median first offer in under an hour, from an institutional lender.
- SBA 504 through a bank and a CDC. A bank or other lender makes a first-lien loan at least as large as the 504 loan, the CDC makes the 504 loan on a second lien from a debenture that SBA guarantees 100%, and the business supplies the rest (13 CFR 120.801). Proceeds buy fixed assets such as land, buildings and long-life equipment.
- A conventional bank loan. One loan, one lender and one set of documents, underwritten on the business's cash flow under the bank's own credit policy.
SBA's own rules narrow the choice. SOP 50 10 8.1 requires the lender to document that some or all of the credit is not available on reasonable terms without SBA's help, and a project whose cash flow and collateral would meet the lender's conventional credit standards is not eligible. Acceptable reasons include a need for a longer maturity than the lender's policy permits, a lender policy against loans to businesses operating two years or less, and collateral short of the lender's policy. For the other SBA route, see SBA 504 vs 7(a) for owner-occupied property.
How do the down payments differ?
An SBA 504 owner-user contributes at least 10% of project cost, or 15% to 20% for a newer business or a special-purpose building, while a conventional bank loan usually needs 20% or more down, according to NerdWallet. That gap is 504's core advantage: more of the business's cash stays in the business after closing.
Under 13 CFR 120.910, the contribution is at least 15% if the business has operated for two years or less, at least 15% for a limited or single purpose building, and at least 20% when both apply. SOP 50 10 8.1 lists hospitals, surgery centers, urgent care centers and other health or medical facilities among its limited or special purpose examples, along with hotels, gas stations and car washes. At 15% or 20%, SOP 50 10 8.1 holds the debenture to 35% or 30% of the project and keeps the bank's share at 50% or more.
On the conventional side, NerdWallet's commercial real estate loan guide, updated May 21, 2026, says most lenders require at least 20% down and most want at least two years in business. Federal supervisory guidelines tell banks to keep their internal loan-to-value limits for improved property at or below 85% (12 CFR Part 34, Subpart D, Appendix A). See owner-occupied loans for how lenders read the business.
Illustrative, our arithmetic for a $2,000,000 purchase of an existing, general-purpose building by a business operating for more than two years:
- SBA 504: $200,000 from the business, $1,000,000 from the bank and $800,000 from the CDC's debenture
- Conventional loan at 20% down: $400,000 from the business and $1,600,000 from the bank
- Cash the business keeps with 504: $200,000
- The same building treated as a special-purpose medical facility: 504 equity rises to $300,000 and the debenture falls to $700,000
How do rates, terms and fees compare?
The 504 debenture's rate is set at a monthly sale against Treasury yields, with a 10-, 20- or 25-year maturity, while a conventional loan carries whatever rate, fixed period and amortization the bank's term sheet sets. The 504 route adds SBA, CDC and underwriter fees, most of them financed into the debenture.
SOP 50 10 8.1 says the debenture rate reflects long-term government debt at the time of sale, most commonly benchmarked to the 10-year Treasury for 20- and 25-year debentures and the 5-year Treasury for 10-year debentures, and that debentures are normally sold once a month. Treasury's daily par yield curve put the 10-year at 4.88% and the 5-year at 4.67% on November 9, 2026. NerdWallet's SBA rate page, updated November 2, 2026, puts 504 loan rates at 5% to 7% and says the effective rate adds the guarantee, CDC servicing and central servicing agent fees to the Treasury base, so ask the CDC for the latest sale's effective rate.
The two halves of a 504 package are priced differently. The bank's first lien can be fixed or variable under a maximum rate SBA publishes, and it cannot carry an early call or demand feature unless the loan is in default (13 CFR 120.921). SOP 50 10 8.1 requires it to run at least 7 years behind a 10-year debenture and at least 10 years behind a 20- or 25-year debenture.
A conventional loan's term and amortization follow bank policy. For income-producing property, the OCC's Comptroller's Handbook calls amortization of 15 to 30 years appropriate in most cases and generally 25 years for office, retail and industrial buildings; a term shorter than the amortization ends in a balloon.
Table: SBA 504 vs a conventional bank loan for an owner-occupied building
| Feature | SBA 504 | Conventional bank loan |
|---|---|---|
| Feature Down payment | SBA 504 At least 10% of project cost; 15% for a business operating two years or less or a limited or single purpose building; 20% if both (13 CFR 120.910) | Conventional bank loan At least 20% at most lenders (NerdWallet, May 21, 2026); 85% supervisory LTV limit on improved property (12 CFR Part 34) |
| Feature Structure | SBA 504 Bank first lien about 50%, CDC debenture up to 40%, business 10% (13 CFR 120.900) | Conventional bank loan One loan from one bank |
| Feature Term | SBA 504 Debenture 10, 20 or 25 years; bank first lien at least 10 years behind a 20- or 25-year debenture (SOP 50 10 8.1) | Conventional bank loan Set by bank policy; a balloon falls due when the term is shorter than the amortization |
| Feature Rate type | SBA 504 Debenture rate set at the monthly sale for its 10-, 20- or 25-year maturity; bank first lien fixed or variable under SBA's published maximum | Conventional bank loan Fixed, floating or fixed for a period, as the term sheet states |
| Feature Upfront fees | SBA 504 SBA guaranty up to 0.5% (13 CFR 120.971), funding 0.25%, CDC processing up to 1.5% and underwriter 0.4% (20- and 25-year), financed into the debenture; 0.5% participation fee on the bank loan | Conventional bank loan Origination, application, appraisal, legal and other closing costs (NerdWallet) |
| Feature Ongoing fees | SBA 504 CDC servicing fee of at least 0.625% a year; SBA annual fee set each fiscal year, capped at 0.9375% (13 CFR 120.971) | Conventional bank loan As the term sheet states |
| Feature Prepayment | SBA 504 Repurchase premium on the debenture, calculated under SBA Form 1504 (SOP 50 10 8.1) | Conventional bank loan A prepayment penalty is likely (NerdWallet); get its schedule in writing |
| Feature Occupancy rule | SBA 504 Business occupies 51% of an existing building or 60% of new construction (13 CFR 120.131) | Conventional bank loan No program minimum; owner-occupied when less than 50% of repayment comes from unaffiliated rent (OCC) |
| Feature Timeline | SBA 504 Bank commitment, CDC application, SBA approval, interim loan, then debenture funding at a monthly sale (SOP 50 10 8.1) | Conventional bank loan One credit approval and one closing |
The CDC may also charge a closing fee, of which up to $10,000 can be financed, and SOP 50 10 8.1 points to SBA's fiscal-year fee notices for the current guaranty and annual fees, so confirm both with the CDC. The participation fee applies when the bank is senior to SBA (13 CFR 120.972), and SOP 50 10 8.1 lets the bank, the CDC or the borrower pay it.
Illustrative, our arithmetic with the SOP's pricing steps on the $800,000 debenture above: a $4,000 guaranty fee, a $2,000 funding fee and a $12,000 processing fee bring the total to $818,000; dividing by 0.996 and rounding up to the next even thousand gives a gross debenture of $822,000, and the underwriter's fee on that is $3,288. Before the CDC's closing fee, the program costs come to $21,288, financed into the loan, against $200,000 of cash kept in the business. The bank's $1,000,000 first lien adds a $5,000 participation fee.
How long does each route take to close?
A conventional bank loan needs one credit approval and one closing, while an SBA 504 purchase needs the bank's commitment, a CDC application, SBA's approval, an interim loan or escrow closing, and then a debenture sale that funds the CDC's share after the 504 loan closes.
SOP 50 10 8.1 sets the order. The bank must be in place at application, evidenced by a letter of intent, term sheet or commitment letter. An interim lender, often the bank, covers the period between SBA's approval and the debenture sale; once the project is complete, the CDC closes the 504 loan and the sale proceeds repay the interim lender. The bank's own loan may close and begin amortizing before the debenture funds. For the documents each lender reviews, see how to prepare an SBA 504 loan application.
When does a conventional loan win?
A conventional bank loan wins when the business or the building fails a 504 test, when one lender and one closing matter more than a small down payment, or when you expect to sell or refinance early enough that 504's financed fees and prepayment premium cost more than the long-term debenture saves.
The 504 tests that can send an owner-user to a bank:
- Leasing: an existing building can be no more than 49% leased to others, and new construction no more than 20% leased permanently (13 CFR 120.131).
- Size: under 13 CFR 121.301, the business and its affiliates must stay within $20 million of tangible net worth and $6.5 million of average after-tax net income over the two preceding fiscal years, or meet the industry size standard.
- Ownership: SOP 50 10 8.1 limits SBA financing to businesses whose direct and indirect owners and required guarantors are all U.S. citizens or U.S. nationals with their principal residence in the United States.
- Jobs: a 504 project must create or retain one job per $95,000 guaranteed by SBA (one per $150,000 for small manufacturers and energy public policy projects) or meet a community development or public policy goal; otherwise the debenture is reduced (SOP 50 10 8.1).
- Guaranty: every individual who owns 20% or more must sign an unlimited full guaranty (SOP 50 10 8.1; 13 CFR 120.160).
- Loan size: the 504 loan is capped at $5 million per borrower and affiliates, or $5.5 million per project for small manufacturers and qualifying energy projects (13 CFR 120.931), so a larger project shifts more of the stack to the bank.
A short hold also favors the bank. The 504 debenture carries a repurchase premium on prepayment, and the financed program fees are paid whether you keep the building for 3 years or 25. A conventional term sheet with a limited or step-down prepayment penalty can cost less over a short hold, even at a higher rate.
How do you get an SBA 504 and a bank loan priced on one package?
You get both routes priced by sending one complete package, with business tax returns, interim statements, the purchase contract, the occupancy plan and each owner's financial statement, and asking for it to be quoted as a 504 structure and as a conventional loan at the same time, so both offers rest on the same numbers.
YieldStack is an AI-native commercial mortgage brokerage that arranges financing for commercial real estate investors. Its software compares one package against 20,000+ loan programs and typically returns 5–8 matches; human brokers structure the request, negotiate for the borrower and carry it toward closing. The SBA loans page shows what SBA lenders test first. Reconcile the business's cash flow before you submit, because SOP 50 10 8.1 requires the CDC to show historical debt service coverage of at least 1.15 to 1.
It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed. Send your owner-user deal for broker review.
The bottom line
SBA 504 is the low-equity, long-term route for an owner-user who passes its tests and plans to hold; a conventional bank loan is the simpler route for one who fails a test, needs one closing or plans a short hold. Price both on the same package, compare equity, fees, blended rate and prepayment cost over your hold, and take the lower total. YieldStack, which publishes this page, is our top pick for running that comparison.