SBA 504 finances owner-occupied real estate via a 50/40/10 structure: 50% bank first mortgage , 40% CDC debenture (25-year fixed), 10% sponsor equity. The gross CDC debenture caps at $5 million for most borrowers and $5.5 million for a small manufacturer or a qualifying energy project. At a 40% debenture, a standard project using the full $5 million cap is about $12.5 million. Closes in 60 to 120 days with a strong CDC.
What is the 504 structure?
Three pieces: a conventional bank first mortgage (typically 50% of project cost, 10- to 25-year amortization, recourse, fixed via swap or floating), a CDC debenture (typically 40% of project cost, 25-year fully amortizing fixed-rate, second lien position), and sponsor equity (typically 10%). The CDC debenture is funded by SBA-guaranteed Certified Development Company-issued bonds priced monthly. Per SBA program disclosures, the 25-year debenture rate has run 5.5% to 6.75% through 2025 to 2026, among the lowest long fixed-rate executions available to small businesses.
Project size: the bank first mortgage is uncapped. The gross CDC debenture caps at $5 million for most borrowers and $5.5 million for a small manufacturer or a qualifying energy project. At a 40% debenture, a standard project using the full cap is about $12.5 million. A $5.5 million manufacturer or energy debenture supports about $13.75 million. Owner-occupancy: 51% for an existing building. New construction requires 60% owner-occupancy at move-in. The borrower may lease 20% permanently and must plan to occupy enough additional space to reach 80% within 10 years.
When does 504 win versus conventional bank or 7(a)?
504 wins on real-estate-heavy deals where the borrower wants long-dated fixed-rate certainty on the second tranche. The CDC debenture is 25-year fully amortizing fixed at sub-7% rates in 2026, meaningfully better than any conventional small-business fixed-rate execution. For an owner-user holding the property for 10+ years, the CDC long bond is the structural advantage.
504 loses on multi-purpose packages where working capital, business acquisition, or non-real-estate use of proceeds matters, those go 7(a). 504 also loses on speed-sensitive deals, the two-loan, two-closing structure adds 30 to 60 days versus a single 7(a) closing. And 504 requires deeper sponsor equity than 7(a) (10% vs typical 10% to 15% but with greater flexibility on 7(a) for cash-strapped sponsors).
What does the CDC do?
The Certified Development Company is a non-profit lender authorized by SBA to underwrite, package, and close the 504 debenture. There are roughly 230 CDCs nationally; many cover multi-state regions. The CDC handles SBA-side underwriting (eligibility, owner-occupancy, public-policy goals, job creation), packages the debenture, and is the second-lien lender on the CDC tranche. The bank handles the first-mortgage underwriting independently.
CDC selection matters. Strong CDCs maintain SBA processor relationships, run clean SBA submissions, and close 504 packages in 60 to 90 days. Weak CDCs add 30 to 60 days and create re-underwriting cycles when SBA returns the package for additional information. Sponsors should ask the bank lender for CDC recommendations in their region and confirm the CDC's recent closing volume and timeline.
What can prevent a 504 loan from closing?
Owner-occupancy ramp on new construction. New-construction 504 requires 60% owner-occupancy at move-in. The borrower may lease 20% permanently and must plan to occupy enough additional space to reach 80% within 10 years. The 51% test is for an existing building. Sponsors planning aggressive lease-up to third-party tenants run afoul of the occupancy ramp. The fix: scale the building to actual operational need rather than maximum lease-up potential, or use a different financing structure.
Job-creation requirements. SBA 504 has a job-creation or community-benefit threshold, typically one job per $90K of debenture (lower for certain manufacturing and public-policy projects). Sponsors who cannot demonstrate the job-creation benefit have to qualify under public-policy alternatives (energy efficiency, HubZone, veteran-owned, etc.). The CDC walks the sponsor through which alternative applies and what documentation is required.
Niches that use this capital
SBA 504, long-term fixed owner-user regularly funds the following CRE niches. Each link below opens a dedicated intersection page covering 2026 LTV/LTC, pricing, the active lender options, deal-size sweet spot, recourse posture, take-out paths, and the underwriting pitfalls that come up most.
- SBA 504 for Self-Storage: see /niches/self-storage/capital/sba-504.
Frequently asked questions
What is the maximum SBA 504 project size?
The bank first mortgage is uncapped. The gross CDC debenture caps at $5 million for most borrowers and $5.5 million for a small manufacturer or a qualifying energy project. At a 40% debenture, a standard project using the full cap is about $12.5 million. A $5.5 million manufacturer or energy debenture supports about $13.75 million.
Can I refinance into SBA 504?
Yes, with a debt-refinance program available since 2010s-era reauthorization. Refinances require substantial benefit to the borrower (typically 10%+ debt-service savings) and the refinanced debt must have been originally used for 504-eligible purposes. Some CDCs specialize in 504 refis; closing typically takes 60 to 120 days.
Do I need full personal guaranty on a 504?
Yes, on both the bank first-mortgage and the CDC debenture. SBA requires personal guaranty from any 20%+ owner. Personal financial statements, global cash-flow underwriting, and SBA Form 1919 disclosure are standard. Sponsors expecting non-recourse should look at conventional bank or specialty owner-user lenders rather than SBA.
Sources
- 504 Loan Program · U.S. Small Business Administration · current
- SOP 50 10: Lender and Development Company Loan Programs · U.S. Small Business Administration · 2024
- Senior Loan Officer Opinion Survey on Bank Lending Practices (SLOOS) · Board of Governors of the Federal Reserve System · 2026-Q1