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The SBA 504 Loan, Explained

What the SBA 504 program is, how its bank-plus-CDC structure works, what it can fund, and how it differs from a 7(a) loan.

Mario Bailey
By Mario Bailey · Updated 2026-06-03

The SBA 504 program is the SBA’s tool for helping small businesses buy big, long-lived assets, mainly owner-occupied real estate and heavy equipment. It works differently from a 7(a) loan, and for the right purchase it is hard to beat.

How a 504 loan is structured

A 504 loan is really two loans plus your down payment. A typical deal looks like this:

  • About 50% from a bank or credit union, as a first-lien loan.
  • About 40% from a Certified Development Company (CDC) and the SBA, as a second-lien loan with a long, fixed rate.
  • About 10% from you, the borrower, as a down payment (more for startups or special-purpose property).

That structure is why 504 loans pair a low down payment with a long, predictable fixed rate.

What is a CDC?

A Certified Development Company is a nonprofit certified by the SBA to deliver the SBA-backed portion of a 504 loan. The CDC works with you and the bank to assemble the financing and handles the SBA paperwork on that piece.

What 504 can and cannot fund

Use a 504 loan to buy, build, or improve owner-occupied commercial real estate, or to purchase long-term equipment and machinery. You generally occupy most of the building. What 504 does not cover is working capital, inventory, or most debt refinancing; for those, the flexible 7(a) program is the right tool.

Terms

504 financing typically runs 10, 20, or 25 years, matched to the asset, with a fixed rate on the CDC portion. Longer terms keep the monthly payment manageable for a large purchase.

Is 504 right for you?

If you are buying property you will occupy or major equipment and you want a low down payment and a long fixed rate, 504 is often the better fit than 7(a). If you need flexibility or working capital, 7(a) wins. Our 504 vs 7(a) comparison shows how they differ in the data, and the eligibility checker suggests one based on your use of funds. Terms and rules follow the current SBA SOP, so confirm details with a participating lender or CDC.

Frequently asked questions

What can an SBA 504 loan be used for?

Owner-occupied commercial real estate and long-term equipment, including buying, building, or improving a building you mostly occupy. It generally cannot fund working capital, inventory, or most refinancing; that is what a 7(a) loan is for.

What is a CDC in an SBA 504 loan?

A Certified Development Company, a nonprofit certified by the SBA to provide the SBA-backed portion of a 504 loan and to work with you and the bank to put the financing together.

How is a 504 loan structured?

A typical 504 deal is about 50% from a bank (first lien), about 40% from the CDC and SBA at a long, fixed rate (second lien), and roughly 10% from the borrower as a down payment.

Sources and disclaimer. Program details come from the U.S. Small Business Administration (sba.gov), and lender figures from the public SBA FOIA loan data described in our methodology. SBA Loan Index is not affiliated with the SBA and is not a lender, broker, or financial advisor. This is general information, not individualized financial advice; verify current details with the SBA and a participating lender.

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