Head-to-Head Comparison
The 504 Advantage: Leverage
The 504's main selling point is leverage. If you can put 10% down, you need half the capital of a conventional loan. Consider a $5M property acquisition. With SBA 504 financing, you need $500K equity (10%), get $1.5M from SBA (30%, second lien), and $3.0M from the bank (60%, first lien), for total leverage of 90%. With conventional financing, you need $1.25M equity (25%) and get $3.75M from the bank (75% LTV), for total leverage of 75%.
The capital difference is $750K more needed for conventional. This is transformative if you're an emerging investor with limited capital. With $500K, you can buy the $5M property using 504. With conventional, you'd max out at $2.5M properties.
The SBA 504 Cost Structure
While the rate might be equal (6.0-7.5%), the 504 structure includes additional costs. SBA Guarantee fees are 1.0-3.0% of loan amount. Bank origination is typically 0.5-1.0%. CDC processing fees are $500-2,500. Appraisal, title, and legal run $3,000-7,000. Total upfront is 2.0-4.5% of the 504 portion.
On a $1.5M SBA portion, you're paying $30-67K upfront just to use government leverage. Some CDCs charge annual monitoring fees of $0-1,000. Slightly higher rate premium on 504 rates (typically 0.25-0.5% higher) costs $3,750-7,500 annually on $1.5M SBA. Total 10-year cost of leveraging via 504 is $60-120K.
Compare this to the alternative: Using a conventional loan with 25% down means deploying an extra $750K of capital. If that capital earns 8% elsewhere, opportunity cost is $60K annually, or $600K over 10 years. Neither is obviously cheaper; it depends on your cost of capital.
When Each Makes Sense
SBA 504 makes sense when you're capital-constrained but can find deals. You have $500K, found a $5M industrial property, and can get conventional at 75% LTV, but don't have $1.25M equity. The 504 solution lets you put $500K down, get $1.5M from SBA and $3M from the bank to own the property. Conventionally, you couldn't do the deal.
504 also works well if you have a multi-year hold plan and strong NOI. The 25-30 year amortization helps with cash flow. Equipment financing is valuable-if acquiring a property with equipment, SBA 504 can finance both real estate and equipment while conventional real estate loans separate them.
Conventional makes sense when you want closing speed-conventional closes in 3-4 weeks to 2 months while 504 takes 4-6 months. If you have capital and want simplicity, put 25-30% down and close in 30 days. Industrial and single-tenant NNN properties are best for conventional since banks love these assets with rates of 6.5-7.0%.
Decision Framework: If you have 35% plus equity and can wait 3 months, conventional is usually better. If capital-constrained or need equipment financing, 504 is better. If capital cost exceeds 10% annually, conventional wins despite larger capital requirement.
Refinancing Considerations
You buy a $5M property with SBA 504 in 2026. By 2030, property is worth $5.8M, and you want to refinance. Your original SBA portion is $1.5M at 6.8% and bank portion is $3.0M at 7.0%, totaling $4.5M. Refinancing in 2030 into conventional at 75% LTV means a new loan of $4.35M at 7.2% with monthly payment (25-year amortization) of $32,350, compared to previous 504 debt service of $29,926. That's $2,424 more monthly ($29K annually). If NOI grew only 10% to $385K, you can't support the higher payment.
Most 504 borrowers refinance into conventional to reduce complexity. But refinancing penalty (higher rates on larger amount) is real. If you stay in 504, you start the 25-30 year clock over and pay another 2-3% in guaranty fees.
Frequently Asked Questions
If rates are the same, which should I choose?
Depends on capital available and timeline. If you have 25% or more equity and can wait 3 months, conventional. If capital-constrained or need equipment financing, 504.
Can I have a 504 and conventional loan on the same property?
Yes. This is the 504 structure itself (SBA second lien plus bank first lien). You cannot get two conventional loans on the same property.
What if I have a mixed-use property (real estate plus equipment)?
504 can finance both. Conventional real estate lenders may not touch equipment. Check lender first.
How much does prepayment penalty cost on a 504 if I refinance at year 5?
Depends on lender. Some charge 0-2% for year 5 prepayment. Others use yield maintenance. Ask CDC upfront for exact terms.