Most explanations of the SBA 504 program stop at the capital stack. A conventional first mortgage, a CDC/SBA second mortgage, a borrower equity injection, and the project is financed.
That description is accurate but incomplete. It describes where the money ends up, not the order it arrives in. And the order matters, because the three pieces of a 504 project do not fund at the same time.
The gap most first-time 504 borrowers do not plan for
The conventional first mortgage closes when the project closes. The CDC/SBA second mortgage does not.
SBA funding of the second mortgage arrives through a debenture, and that debenture typically funds 45 to 90 days after the first mortgage has closed. There is nothing unusual about that window. It is how the program works. Debentures are pooled and sold on a scheduled cycle, and a given project waits for the next applicable funding date.
Which leaves a practical problem. The seller has to be paid at closing. The construction or renovation work does not pause for a funding cycle. But the 30 to 40 percent of the project that the CDC/SBA second mortgage represents is not available on the day the transaction closes.
Something has to cover that position in the interim. That something is the interim note.
What the interim note does
Interim financing funds the portion of the project that the SBA debenture will eventually take out, so the transaction can close on a normal commercial timeline rather than waiting on the debenture cycle.
Under BLC’s published program, the interim note is structured for up to 90 days with interest-only payments. Interim loan pricing is listed at a range with a stated loan fee, and like every other term in the structure, the final numbers depend on the transaction. The note is retired when the debenture funds. That payoff is the entire purpose of the instrument.
BLC requires concurrent closing with the SBA when interim financing is used. That requirement is worth understanding rather than skimming past, because it shapes the coordination work described below.
How the sequence runs
Step one, the first mortgage executes. The conventional first mortgage closes as part of the broader project structure, covering roughly 50 percent of the project.
Step two, the SBA side closes concurrently. The CDC/SBA documentation is completed alongside the first mortgage close rather than after it. Concurrent closing is what makes the interim position a defined, short-duration exposure instead of an open-ended one. Any transaction that includes future fundings for CapEx, PIP, or other delayed financing items will not qualify for a concurrent closing. Only transactions where all loan proceeds are disbursed at closing can qualify for a concurrent closing.
Step three, the interim note carries the second position. For up to 90 days, interest-only, while the debenture works through its funding cycle.
Step four, the debenture funds and the interim note is paid off. The permanent 504 structure is now in place: a first mortgage of roughly 50 percent, a CDC/SBA second of 30 to 40 percent, and the borrower’s 10 to 20 percent equity injection.
Who is doing what
A 504 project has more parties than a conventional loan, and interim financing is where their timelines have to line up, and using an experienced 504 lender is critical for this timing to come together efficiently.
The borrower supplies the equity injection and the project documentation, and keeps the operating business moving through a period when attention is easily consumed by the transaction.
The CDC handles SBA eligibility, packaging, and the debenture submission. CDC relationships and process familiarity are a real variable in how smoothly a 504 project runs, which is why the SBA CDC/504 program at BLC is built around working with knowledgeable CDC partners rather than around the borrower coordinating that relationship alone.
The first mortgage lender underwrites and closes the first position. When that lender also provides the interim note, the number of parties who have to agree on timing drops, and the coordination between the first mortgage close and the debenture payoff sits inside one relationship.
Questions worth asking early
Who is providing the interim financing on this project?
Not every 504 transaction has this answered at the outset, and it is a better question to raise in week one than in week six.
Is the interim note structured for the actual expected debenture window?
A 90-day interim structure (allowing for any delays on the CDC/SBA side) and an anticipated debenture funding 45 days out are compatible. A structure that is too short for the realistic cycle creates a problem that has to be solved under time pressure.
What are the interest-only payments during the interim period, and who is budgeting for them?
They are usually modest relative to the project, and they are still a real line item.
Where this fits in the larger decision
Interim financing is a mechanic inside the 504 structure, not a reason to choose the structure. The reason to choose a 504 is the leverage and the long-term fixed portion it provides on owner-occupied real estate. The reason to understand the interim note is that it is the part of the process most likely to surprise a borrower who has only read the capital stack summary.
If you are still weighing whether a 504 structure is the right path at all, the SBA 504 vs conventional loan comparison covers that decision in more detail.
To discuss a 504 project, the useful starting details are the property and its location, project cost, business occupancy, the requested financing, use of proceeds, borrower background, and timing.
Information in this article is provided for general informational purposes only and does not constitute a commitment to lend or legal, tax, or accounting advice. Program parameters and SBA timelines described here reflect published terms and general experience, and are subject to change. All financing requests are subject to underwriting, collateral review, borrower qualifications, lender approval, and transaction-specific terms.