Most business owners assume buying commercial real estate requires a 25–30% down payment. That assumption keeps a lot of businesses renting space they could own. The SBA 504 loan changes the math significantly — and most business owners have never heard of it.

The SBA 504 is a government-backed commercial real estate loan that allows qualifying small businesses to purchase owner-occupied commercial property with as little as 10% down. For a $1 million building, that's $100,000 instead of $250,000–$300,000. For a $500,000 property, it's $50,000 instead of $125,000–$150,000.

This guide explains exactly how the 504 works, what it costs, who qualifies, and how it compares to conventional commercial real estate financing.

How the SBA 504 Loan Structure Works

The SBA 504 is unusual because it involves two separate loans funding a single property purchase:

The bank loan (50% of project cost)
A conventional bank or SBA-approved lender provides the first mortgage, covering 50% of the total project cost. This loan is held by the bank on standard commercial terms.

The SBA debenture (40% of project cost)
A Certified Development Company (CDC) — a nonprofit SBA intermediary — provides a second loan funded by SBA-guaranteed bonds, covering 40% of the project cost. The CDC debenture carries a fixed interest rate for the full term (10, 20, or 25 years), which is one of the most attractive features of the 504.

Your down payment (10% of project cost)
The borrower contributes the remaining 10%. For startup businesses (under 2 years) or special-purpose properties (car washes, gas stations, hotels), the requirement increases to 15–20%.

Example: $800,000 commercial property purchase

• Bank loan (50%): $400,000 — conventional first mortgage
• SBA debenture (40%): $320,000 — 25-year fixed rate through CDC
• Borrower down payment (10%): $80,000

Without the 504, a conventional commercial mortgage at 75% LTV would require $200,000 down on the same property. The 504 reduces that to $80,000 — a $120,000 difference that can fund hiring, equipment, or working capital instead.

SBA 504 Loan Terms

Loan amounts:

• Standard maximum: $5 million for the SBA debenture portion
• Manufacturing businesses and energy efficiency projects: up to $5.5 million
• No cap on the bank loan portion (lender discretion)

SBA debenture terms:

• 10-year term (for equipment purchases)
• 20-year term (for real estate)
• 25-year term (for real estate — newer option providing lower payments)
• Fixed interest rate for the full term (rate set at time of debenture funding)
• Fully amortizing — no balloon payment

Bank loan terms: Negotiated with the individual bank. Typically 10-year term with a balloon, though some banks offer longer amortization periods.

SBA guaranty fee: The SBA charges a guaranty fee on the debenture portion, typically around 0.5% annually on the outstanding balance. This is often financed into the debenture rather than paid at closing.

Who Qualifies for the SBA 504

SBA 504 eligibility requirements:

Business requirements:

• For-profit business operating in the United States
• Net worth under $15 million
• Net income under $5 million (average of the prior 2 years)
• The property must be owner-occupied — the business must occupy at least 51% of the space for an existing building (60% for new construction)

Borrower requirements:

• Good credit — 680+ personal credit score is a typical target, though the bank sets its own minimum
• Demonstrated ability to repay from business cash flow (DSCR typically 1.25+)
• No outstanding federal debt or prior SBA loan defaults
• Personal guarantee from all owners with 20%+ ownership

Property requirements:

• Owner-occupied commercial real estate (not investment property)
• Most property types qualify: office, retail, warehouse, manufacturing, medical, dental, mixed-use with majority owner-occupancy
• Special-purpose properties (gas stations, car washes, hotels) typically require 15–20% down

SBA 504 vs. Conventional Commercial Mortgage: The Real Comparison

The most important comparison for most buyers is 504 vs. conventional commercial financing on the total cash required and monthly payment:

$1,000,000 property purchase comparison:

Conventional commercial mortgage (75% LTV, 5-year balloon, 25-year amortization, 7% rate):

• Down payment: $250,000
• Monthly payment: ~$5,300
• Balloon payment at year 5: ~$880,000 (refinance required)

SBA 504 (10% down, 25-year term):

• Down payment: $100,000
• Bank loan monthly payment: ~$2,700 (at 7%, 25-year am)
• SBA debenture monthly payment: ~$2,000 (at fixed 6.5%, 25-year)
• Total monthly payment: ~$4,700
• No balloon payment — fully amortizing to zero

Lower down payment, lower monthly payment, no balloon risk. For most qualifying businesses, the 504 is clearly superior to conventional financing.

What the 504 Process Looks Like

The 504 process involves more parties than a conventional mortgage, which makes it longer — but the outcome is worth it for most buyers.

Step 1: Find a bank (first mortgage lender)
Start with a bank that regularly does SBA 504 deals. Not all banks participate. Banks that do 504s regularly know the process and can move efficiently. Your CDC can often recommend active bank partners.

Step 2: Find a Certified Development Company (CDC)
CDCs are SBA-approved nonprofits that process the debenture portion. There are CDCs in every state; some operate nationally. The SBA's website lists all active CDCs by state. CDCs don't charge interest — their revenue comes from fees on the debenture.

Step 3: Submit applications to both
You'll provide financial documentation to both the bank and the CDC. The bank underwrites the first mortgage; the CDC underwrites the SBA debenture portion.

Step 4: SBA approval
The CDC submits the debenture application to the SBA for authorization. SBA review typically takes 3–5 business days once the application is complete.

Total timeline: 45–90 days from application to closing is typical. Faster is possible with organized documentation; delays come from incomplete packages.

What the 504 Can and Cannot Finance

504 eligible uses:

• Purchase of owner-occupied commercial real estate
• Construction of new commercial facilities
• Renovation or improvement of existing owned facilities
• Major fixed equipment purchases (machinery, manufacturing equipment)
• Refinancing of existing commercial real estate debt (under specific conditions)

504 ineligible uses:

• Investment property (non-owner-occupied)
• Working capital
• Inventory
• Consolidation of non-real-estate debt

Not sure whether the SBA 504 or SBA 7(a) is the right fit? Our SBA 7(a) vs. 504 comparison breaks down which program works best by project size and use of proceeds. Ready to explore your eligibility? Submit a commercial real estate loan application and we'll match you with the right SBA lender.

💡 BestLoanUSA works with SBA 504 lenders and CDCs across all major markets. Pre-screen your 504 eligibility with no credit impact.