The SBA 504 program finances the biggest, longest-lived assets a small business buys, mainly the building it operates from, with a structure no other loan uses: a bank, a nonprofit development company, the SBA, and the borrower each take a defined slice. Of the 1,036,074 SBA loans funded from fiscal year 2010 through March 31, 2026, 116,345 were 504 loans, 11.2% of the count and 19.4% of approved dollars: the average 504 loan in the record, counting only the CDC/SBA debenture, is $831,070, against $435,855 for the average 7(a) loan. This guide explains the structure, what it can fund, what it costs, and what the record shows.
How a 504 project is financed
13 CFR 120.801 sets the pieces:
- A third-party loan, usually from a bank or credit union, for the balance of the project after the other two pieces, secured by a first lien. In a standard deal that is about 50%.
- A CDC loan, funded by a debenture, for up to 40% of project cost plus certain administrative costs, secured by a second lien. The debenture is guaranteed 100% by the SBA and sold to investors in monthly pools.
- A borrower contribution of at least 10% of project cost under 13 CFR 120.910, rising to 15% if the business has operated for two years or less or the property is limited- or single-purpose, and to 20% if both apply. The higher contribution comes out of the CDC’s share, not the bank’s.
Most projects also need interim financing, typically from the same bank, to carry the CDC portion from closing until the debenture is sold. The CDC packages the SBA piece, coordinates the bank, and services the debenture for the life of the loan.
Who the CDC is
A Certified Development Company is a nonprofit corporation certified by the SBA to deliver 504 financing in a defined area, with an economic development mission written into its charter. It is not a bank and does not fund the first lien. Because CDCs are regional, the useful question is which ones actually close projects near you: the certified development companies directory ranks every CDC in the SBA’s record by funded 504 volume and groups them by state.
What 504 can and cannot fund
Eligible project costs under 13 CFR 120.882 are land, existing buildings, construction, renovation and improvements, long-term machinery and equipment with a remaining useful life of at least 10 years, and the professional fees, interim-financing costs, and up to 10% construction contingency directly attributable to the project. The building must be owner-occupied: at least 51% of an existing building, at least 60% of new construction at completion.
Excluded are working capital, inventory, and speculative or rental real estate. Refinancing is narrower than under 7(a): existing debt on eligible fixed assets can be rolled into an expansion project, and debt can be refinanced without expansion if the business has operated for the full two years before applying, has been current for at least a year, and gets a substantial benefit. The full eligibility list, including the job-creation requirement, is in SBA 504 loan requirements.
Size limits
The debenture may not exceed 40% of project cost, may not be less than $25,000, and is capped at $5 million per project, or $5.5 million for small manufacturers and projects meeting an energy public-policy goal. Because the debenture is 40%, a $5 million debenture supports a $12.5 million project. Since July 4, 2026, a borrower who secures a 7(a) loan first may also hold up to $5 million in 504 financing, for $10 million in combined SBA-backed debt; see SBA loan limits.
Terms and rates
The debenture is sold as a 10-, 20-, or 25-year bond and carries a fixed rate for that entire term. The 10-year debenture is used for equipment, the 20- and 25-year for real estate. The rate is set at each monthly sale off the yield on 10-year Treasury notes plus a market spread, and the effective rate quoted to borrowers already includes the ongoing CDC, SBA, and servicing-agent fees. The current month’s rate is on the SBA 504 loan rates page, with the history and a blended-cost example. The bank’s first lien is priced separately, fixed or variable, and under 13 CFR 120.921 must run at least 10 years on a 20-year debenture and at least 7 on a 10-year one, with no early call or demand provisions unless the loan is in default.
In the record, the median stated term on a 504 loan is 240 months, the standard 20-year debenture, against 120 months on 7(a). That fixed 20- or 25-year rate on roughly 40% of the project is the program’s central advantage over a 7(a) real estate loan, whose rate can reset monthly; fixed vs variable SBA rates works through the trade-off.
Fees
Every fee a CDC may charge is listed in 13 CFR 120.971: a 0.5% SBA guarantee fee on the debenture, a CDC processing fee of up to 1.5%, a funding fee of up to 0.25%, SBA-approved underwriting and agent fees, and the CDC’s closing costs, all one-time and normally financed into the debenture; plus ongoing CDC servicing and SBA annual fees that are built into the effective rate. For fiscal year 2026 the SBA upfront fee is 0.50% and the annual fee 0.209%, with small manufacturers paying 0% on both. The bank pays the SBA a separate 0.5% participation fee on its first lien. Each line is explained in SBA 504 loan fees.
Eligibility in brief
The borrower must be an operating, for-profit U.S. business, small under its industry standard or the alternative test (tangible net worth of $20 million or less and average net income of $6.5 million or less), with a project that creates or retains one job per $90,000 of debenture ($140,000 for small manufacturers) or meets a community development or public policy goal. Owners of 20% or more guarantee the loan. The project property secures both liens, which is why 98.4% of 504 loans in the record were collateralized at approval, against 75.9% of 7(a) loans.
504 or 7(a)?
For owner-occupied real estate or heavy equipment, 504 usually offers the lower contribution and the fixed long-term rate. For anything else, working capital, inventory, most acquisitions, or a mixed-purpose loan, 7(a) is the tool, and the two are often paired: a 7(a) loan for the business and a 504 loan for the building. The 504 vs 7(a) comparison shows how the programs differ in size, term, industry, and outcome across the record, and the eligibility checker recommends one from your use of funds.
Running the numbers
The SBA 504 calculator models the bank and debenture payments at the current fixed rate, applies the 10%, 15%, or 20% contribution, and prints a year-by-year amortization schedule. Pair it with the certified development companies directory to find the CDCs that actually fund projects in your state, and with how much you can borrow for the cash-flow test the CDC will apply. Program rules follow the SBA regulations and the SOP in effect when the SBA issues a loan number; SOP 50 10 8.1 applies from October 1, 2026. Confirm specifics with a CDC or participating lender.