SBA 504 Loan: Complete 2026 Guide

How the SBA 504 Three-Party Structure Works

The defining feature of the SBA 504 program is its three-party loan structure. This is what allows borrowers to put as little as 10% down on commercial real estate while still receiving a 20- or 25-year fixed-rate term on the SBA portion — a combination that does not exist anywhere else in commercial lending.

1. The Conventional First Mortgage (50%)

A bank, credit union, or non-bank lender provides 50% of total project cost as a senior secured first mortgage. This lender sets its own rate and term, but typically offers a 10-year fixed rate that adjusts to a longer amortization. Because the first mortgage holder is in the senior lien position behind only the SBA debenture, lenders compete aggressively for 504 first-mortgage business.

2. The CDC Debenture (40%)

A Certified Development Company — a nonprofit chartered by the SBA — provides up to 40% of project cost through an SBA-guaranteed second mortgage called a debenture. The debenture rate is set monthly based on Treasury yields plus a fixed servicing spread and is fully amortized over 20 or 25 years at a fixed rate. This is the SBA-backed portion of the deal.

3. The Borrower Equity (10–20%)

Standard projects require 10% borrower injection. Special-purpose properties (hotels, gas stations, car washes, bowling alleys) require 15%. New businesses (operating less than two years) require 20%. The injection can include cash, land already owned, or assumable equity in the property being acquired.

What Can SBA 504 Funds Be Used For?

• Owner-occupied commercial real estate — purchase, ground-up construction, or expansion of buildings where the borrower's operating business occupies at least 51% of the space (60% for new construction).
• Major equipment — machinery with a useful life of 10+ years. Common for manufacturing, printing, food processing, and medical imaging.
• Property improvements — renovation, energy efficiency upgrades, ADA compliance, FF&E for hotels.
• Refinancing — under specific 504 refinance program rules, existing commercial debt on owner-occupied property can be refinanced if it meets occupancy and use tests.

What 504 Funds Cannot Be Used For

• Working capital (use SBA 7(a) instead — see SBA 7(a) hub)
• Inventory or short-term assets
• Investment real estate (non-owner-occupied)
• Goodwill in a business acquisition (use 7(a))

SBA 504 Eligibility Requirements

To qualify for a 504 loan, the operating business must:

• Be a for-profit business operating in the United States
• Have a tangible net worth under $20 million
• Have average net income under $6.5 million over the last two years
• Occupy at least 51% of the property being purchased (60% for new construction, with plans to occupy 80% within 10 years)
• Demonstrate the ability to repay from business cash flow
• Have personal guarantees from all 20%+ owners

For a deep dive on eligibility and how lenders evaluate your application, see our SBA loan requirements guide and improve your SBA loan approval odds.