Updated October 5, 2026

SBA 504 Loans Explained

While the SBA 7(a) program is a single loan with an SBA guarantee layered on top, the 504 program works entirely differently. It uses a three-party capital structure: a bank or credit union provides the first lien, a certified development company (CDC) provides the second lien as a 100% SBA-guaranteed debenture, and the borrower contributes the remainder as equity. The CDC raises the money for its portion by selling that debenture to investors, and the SBA guarantees it in full. The result is a fixed-asset financing vehicle that can lock in long-term, fixed-rate debt on the CDC portion while leaving the first lien to conventional underwriting standards.

This guide covers how the 504 program is structured, what it can and cannot be used for, how the numbers work, and how it compares to the 7(a) program. For the broader documentation checklist that applies across loan types, see the loan documents guide or use the interactive checklist.

The capital structure

Every 504 loan is built from three funding sources, each with a distinct role. The first lien typically comes from a traditional lender — a bank, credit union, or eligible nonbank — and is underwritten to conventional commercial standards. The second lien is a debenture issued by a CDC and is guaranteed 100% by the SBA. The borrower's portion is cash equity brought to the closing table, though in refinancing transactions it can include the equity being released from an existing asset.

The standard split is 50% first lien, up to 40% CDC debenture, and 10% borrower equity. Two adjustments reduce the CDC share in higher-risk scenarios. For new businesses or special-purpose properties — such as a single-tenant building the borrower will occupy — the CDC's share drops from 40% to 35% and the borrower's minimum equity rises from 10% to 15%. When both conditions apply simultaneously — for example, a startup constructing its own single-tenant facility — the CDC share falls again to 30% and the borrower must contribute at least 20%.

The first-lien lender makes the first mortgage or deed of trust on the property. The CDC takes a second lien position and, because the debenture is 100% SBA-guaranteed, investors who buy it are protected, but you remain fully responsible for repaying it. This is the structural difference that makes 504 attractive for borrowers who want a fixed-rate second mortgage on a commercial property.

Maximum loan amounts

The standard 504 maximum is $5 million. For small manufacturers classified under NAICS codes 31 through 33, the ceiling rises to $5.5 million. Energy efficiency and renewable energy projects can also qualify for the higher limit, and the aggregate cap for combined energy projects is $16.5 million. These are statutory limits as commonly described; SBA's own program summary lists $5.5 million as the maximum loan amount, and individual CDCs and first-lien lenders may set lower internal ceilings. Confirm the figure that applies to your project with a CDC.

Eligible uses

The 504 program is restricted to fixed assets. The SBA defines qualifying assets as those with a useful life of at least ten years, which is why real estate is the dominant use case.

• Commercial buildings, including new construction and major renovations that extend the asset's useful life.
• Land and land improvements, including parking lots, landscaping, site utilities, and driveway surfacing.
• Long-term machinery and equipment with a useful life of ten years or more, such as manufacturing equipment, HVAC systems, and server infrastructure.
CDC debentures also finance qualified debt refinancing under 13 CFR 120.882, which allows existing fixed-asset debt to be refinanced through the 504 program if the current loan is a traditional or credit-score-based commercial mortgage.

Because the program targets fixed assets, every dollar borrowed must tie to a documented, depreciable, or appreciable asset. The use-of-proceeds schedule you submit at application becomes part of the SBA approval, and any deviation requires a revised application.

Ineligible uses

The 504 program cannot be used for:

• Working capital, including inventory purchases and accounts receivable financing.
• Inventory, even if the inventory is part of a business acquisition.
• Speculation, including buying a property with no intent to occupy or use it.
• Rental real estate, unless the borrower occupies the property as its principal place of business or the asset is otherwise directly tied to the borrower's operations.

If a single transaction includes both eligible and ineligible components, the borrower must structure the ineligible portion outside the 504 program — typically as a separate conventional loan or through a line of credit.

Terms and rates

The CDC debenture carries a fixed interest rate that SBA describes as set at an increment above the current market rate for 10-year U.S. Treasury issues, so it moves with the market until your loan is funded and then stays fixed. SBA charges 0.50% upfront and 0.203% annually on the debenture for loans approved in fiscal year 2027, and the CDC may add its own processing fee. The total cost depends on the first-lien lender's rate and your credit profile, so ask a CDC for a current estimate. The minimum debenture the CDC can issue is $25,000; any CDC contribution below that threshold is handled as an add-on to the first lien rather than as a separate debenture.

Maturities are tied to the asset being financed. Real estate loans carry a 20- or 25-year term, depending on the asset's remaining useful life. Equipment and other personal property loans carry a 10-year term. The first-lien portion from the bank follows conventional commercial amortization, which may differ from the CDC debenture term. This mismatch is normal — the bank may amortize over 20 years while the CDC debenture runs 25 — and borrowers structure payments accordingly.

The two-payment structure

Because the financing comes from two independent sources, the borrower makes two separate payments. The bank loan payment follows the bank's payment schedule and may have a variable or fixed rate. The CDC debenture payment is fixed and is collected by the Central Servicing Agent, which the SBA operates through the SBA Loan Portal. Both payments must be current to keep the overall loan in standing, and a default on either triggers the SBA guarantee on that portion.

Job creation

The 504 program was designed as an economic development tool, so job creation is a core requirement. Borrowers must create or retain one job opportunity for a set amount of 504 funding, or meet one of the program's public-policy or community-development goals. SBA publishes the dollar amount per job in the Federal Register and has updated it for loans approved on or after October 1, 2025, with a higher amount for small manufacturers, so ask your CDC for the current figure. The job-creation commitment is made at application and verified at closing; if the commitment is not met, the CDC may reduce or deny the debenture portion.

Finding a CDC

The SBA maintains a current list of certified development companies at sba.gov/loans/504-loans/list-of-certified-development-companies. Start there to confirm that your preferred CDC is still in good standing, find one in your region, and verify that it is currently accepting new projects.

7(a) vs 504: which program is right for you?

The 7(a) and 504 programs overlap on real estate and equipment, but they serve different needs. The table below summarizes the key differences so you can choose the structure that matches your priorities.

FAQ

Can I have both a 7(a) and a 504 loan at the same time?

Yes. Many borrowers use a 504 loan for the real estate and a 7(a) loan for working capital or equipment. The SBA allows this as long as the total SBA exposure does not exceed the applicable guaranty percentage limits and the combined proceeds do not exceed the borrower's overall financing need. Each loan is underwritten separately, and the borrower must satisfy two sets of eligibility requirements.

What happens if I miss a payment on the bank portion?

The bank first lien and the CDC debenture are independent obligations. A missed payment on either triggers the respective remedy — the bank may accelerate or foreclose on the first lien, and the CDC may exercise its rights under the second lien. Because the CDC debenture is 100% SBA-guaranteed, the SBA step-in rights protect the debenture holder, but the borrower is still in default on that portion. Keeping both payments current is essential to maintaining SBA standing.

Do I need to work with a CDC directly, or does my bank handle it?

You can approach either path. Some banks act as the CDC's correspondent and coordinate the entire 504 transaction on your behalf. Other borrowers work with a CDC directly and bring their own first-lien lender. The SBA's list of CDCs includes contact information for each, and most CDCs will work with any eligible first-lien lender.

How long does a 504 loan take to close?

Typical timelines run 60 to 120 days from a complete application to funding, although the exact duration depends on the CDC's caseload, the complexity of the project, and how quickly supporting documents are delivered. Real estate closings that require environmental reports or new construction add weeks to the schedule. Starting the process with all documents assembled — see the loan documents guide — is the single biggest accelerator available.

Disclaimer

This guide is a planning resource based on publicly available SBA guidance as of October 2026. It is not a loan offer, pre-approval, or guarantee of credit, and does not constitute financial, tax, or legal advice. SBA program rules, fees, and loan limits change without notice; always confirm current figures directly with an SBA-approved lender or certified development company. LoansFlow is not a lender, mortgage broker, or SBA-approved lender, and using this guide does not constitute an application for credit.