The quick read: Yes, an owner-occupant can refinance an existing commercial mortgage into an SBA 504 loan, without expanding, if the business has operated for the full two years before applying and the mortgage is qualified debt: at least six months old, with 75 percent or more of its original proceeds spent on fixed assets. Under 13 CFR 120.882(g), the bank first mortgage and the 504 loan together may cover no more than 90 percent of the collateral's fair market value. Whether it beats renewing with your bank turns on the balloon date, the rate reset and how much of the stack you want fixed for 20 or 25 years.
As of: October 6, 2026 (13 CFR Part 120, January 1, 2025 edition, and SBA program pages read this date)
Business operating history: all of the 2 years before the application, under 13 CFR 120.882(g)(2)
Age of the debt being refinanced: incurred not less than 6 months before the application
Original use of the debt: substantially all (75% or more) for an Eligible Fixed Asset
Bank loan plus 504 loan: no more than 90% of the fair market value of the fixed-asset collateral
Borrower share: not less than 10%, or 15% for a limited or single purpose building; 504 share: not more than 40%
Current SBA policy document: SOP 50 10 8.1, effective October 1, 2026
Can you refinance an existing commercial mortgage into an SBA 504 loan?
Yes, SBA's 504 program can refinance an existing commercial mortgage on a building your business occupies, either as part of an expansion or on its own, because 13 CFR 120.882 lists both routes as eligible project costs. The refinance-only route has its own tests on the business, the debt and the loan-to-value ratio.
SBA's own 504 page puts it in one line: 504 proceeds can be used for repaying or refinancing debt defined as qualified debt, and cannot be used for consolidating, repaying or refinancing debt that does not meet that definition. Everything in this article is about that definition and the conditions wrapped around it. The building still has to be owner-occupied: 13 CFR 120.131 lets a borrower in an existing building permanently lease up to 49 percent of it only if the business permanently occupies and uses no less than 51 percent. An investor who rents the whole building to unrelated tenants cannot use 504 to refinance it, whatever the debt looks like.
What makes your mortgage qualified debt for a 504 refinance?
Your mortgage is qualified debt for a 504 refinance without expansion when it was incurred at least six months before the application and substantially all of it, 75 percent or more, financed an Eligible Fixed Asset such as the building, the land or long-life equipment, under the definitions in 13 CFR 120.882(g)(16).
Three tests sit together, and the CDC will check each against your documents:
The business: in operation for all of the 2-year period ending on the date of application, under paragraph (g)(2).
The age of the debt: incurred not less than 6 months before the date of the refinancing application.
The use of the original proceeds: 75% or more for an Eligible Fixed Asset, which is why a mortgage that was partly a cash-out for working capital needs a use-of-proceeds trace.
The regulation also looks through earlier refinancings. If the building was first financed with a commercial loan and that loan was later refinanced one or more times, the current loan is deemed to satisfy the test when the original financing did. Keep the original closing statement, not just the latest note.
Extra conditions apply when the debt being refinanced is government-guaranteed. An existing 504 loan can be refinanced only if both the bank loan and the 504 loan are being refinanced or the bank loan has been paid in full, and an existing 7(a) loan can be refinanced if the CDC notifies the 7(a) lender in advance in writing. Refinancing a federally guaranteed loan must also give a substantial benefit: the part of the new installment attributable to the refinanced debt must be lower than the existing installment. Debt owed to the same CDC or bank that is funding the refinance is Same Institution Debt, which SBA itself must approve rather than a delegated CDC.
How much can a 504 refinance lend, and can it include cash for business expenses?
A 504 refinance without expansion can lend up to 90 percent of the fair market value of the fixed assets that serve as collateral, counting the bank's first mortgage and the 504 loan together, under 13 CFR 120.882(g). Any cash beyond the payoff of the old loan is limited to Eligible Business Expenses.
Under paragraph (g)(5), the borrower contributes at least 10 percent, or 15 percent for a limited or single purpose building, and the 504 loan provides no more than 40 percent. The structure is a bank first lien, the CDC's debenture-funded second lien behind it, and the borrower's equity in the building counted as the borrower's share. The regulation requires a Third Party Loan at least as large as the 504 loan, so the bank holds first position on the larger piece.
The cash-out piece is narrower than a conventional cash-out. Paragraph (g)(6) lets the application include Eligible Business Expenses when the cash the refinance provides exceeds the amount paid to the holder of the qualified debt. The regulation defines those as payments for Operating Expenses, meaning expenses incurred but unpaid before the application or coming due within 18 months after it, or Other Secured Debt, meaning earlier debt secured by the same fixed assets and incurred for the borrower or its operating company. Business credit-card and business line-of-credit balances for operating expenses can qualify when issued in the business's name. It is not a general cash-out for a down payment on another property. SBA's 504 page separately bars 504 proceeds from speculation or investment in rental real estate.
The refinance also carries costs a purchase does not. The borrower pays SBA a supplemental annual guarantee fee set each fiscal year, and the 504 loan must be disbursed within 9 months of approval.
Can you refinance a bridge loan used to buy the building into a 504?
A short-term commercial loan used to buy an owner-occupied building can later become qualified debt for a 504 refinance, because 13 CFR 120.882(g)(16) defines qualified debt by tests rather than loan type: at least six months old, 75 percent or more spent on the fixed asset, for the benefit of the business and secured by that asset.
That is the regulation's test. SBA's SOP 50 10 8.1, effective October 1, 2026, adds that the debt must have been fully disbursed, and secured by the fixed asset, for at least 6 months before the application, and the CDC and the bank still underwrite the file, so confirm the treatment of your specific note before you rely on it. The same SOP also lists Short-Term Debt, which it calls bridge financing, with a term of 3 years or less as an eligible use of proceeds in a standard 504 project, so ask the CDC which route fits. The cost to plan for is paying for two closings: the bridge lender's origination fees and exit terms first, then the 504 refinance's bank fees, CDC and SBA fees, appraisal and title. The alternative that avoids the double closing is 504's own interim-financing route, where a bank funds the purchase knowing the debenture will take it out; the bridge loan before an SBA 504 guide covers how that sequence works.
Is a 504 refinance better than renewing with your bank?
A 504 refinance is better than renewing with your bank when you want a long fixed rate on part of the debt and can meet the qualified-debt tests, while a bank renewal is faster and cheaper to close when the reset terms are acceptable and the balloon is close, so the answer depends on timing and rate risk.
Rate levels move daily, so the table below compares how each route is set, not today's numbers. For current figures, see SBA 504 and 7(a) loan rates.
| Refinance route for an owner-occupied building | Maximum leverage | Rate and term | Debt and business tests | Cash-out | Timeline drivers |
|---|---|---|---|---|---|
| SBA 504 refinance, no expansion | Bank loan plus 504 loan up to 90% of fixed-asset fair market value | 504 portion pegged above the 10-year Treasury; 10-, 20- or 25-year maturities | Business operating 2 full years; debt at least 6 months old; 75%+ used for fixed assets | Limited to Eligible Business Expenses | CDC and SBA approval; 9-month disbursement window |
| SBA 504 refinance with expansion | Existing debt up to 100% of the expansion project cost may be added | Same 504 structure | 75%+ of original proceeds for fixed assets; current on payments for at least 1 year | None beyond the project | Expansion project scope plus refinance review |
| SBA 7(a) refinance | Lender sizing within the $5,000,000 per-loan maximum | Up to 25 years including extensions on real estate | Lender and SOP tests | Lender and SOP rules | One lender's SBA process |
| Bank renewal or extension | Bank policy; a renewal without new funds is excluded from the 85% supervisory LTV limit for improved property | Bank's own reset, often a new short fixed period or floating | The bank's own credit review | Bank policy | Often the fastest, with the existing lender |
| New conventional loan | Bank policy; the same 85% supervisory limit, with limited exceptions | Lender's own pricing and term | New lender's underwriting | Lender policy | New appraisal, title and closing |
Dated: SBA figures read from 13 CFR 120.882, 120.131, 120.151 and 120.212 (January 1, 2025 edition) and SBA's 504 page on October 6, 2026; the bank limit read from the appendix to 12 CFR part 34, subpart D, the same day. Bank and conventional rows describe the mechanism, not a quoted term.
The mechanism is the point. A bank renewal typically resets the same loan to another short fixed period, so the balloon comes back. A 504 refinance swaps part of the stack into a debenture with a long fixed term, while the bank first mortgage keeps its own terms. The extend-or-refinance decision in general is covered in should you extend or refinance a maturing commercial loan; the 504 route adds the qualified-debt tests and the longer closing.
When does a 504 refinance not make sense?
A 504 refinance usually does not make sense when the balloon falls due before a CDC and SBA approval can realistically close, when the business occupies less than 51 percent of the building, or when most of the original loan funded working capital rather than the building or equipment.
Other warning signs: the business has operated for less than the full two years; the debt is less than six months old; the debt is an existing SBA or other federally guaranteed loan and the new installment on the refinanced portion would not be lower than today's, which fails the substantial-benefit test; or the existing note carries a prepayment premium large enough to wipe out the gain. In those cases the realistic paths are a bank extension to buy time or a conventional refinance, and the 504 route can be revisited once the debt and the business meet the tests.
What does a lender need to see for a 504 refinance?
A lender and CDC need to see the recorded mortgage and current note, the payment history on that note, the original closing statement showing how the proceeds were used, proof that your business occupies at least 51 percent of the building, and two years of business financial statements before they can size a 504 refinance.
Add a payoff letter from the current lender, the existing note's prepayment terms, a rent roll for any space leased to other businesses, and a schedule of any operating expenses or other secured debt you want included as Eligible Business Expenses. If the loan was itself a refinance, include each prior closing statement back to the original purchase so the 75 percent use-of-proceeds test can be traced.
How do you get lenders competing for your 504 refinance?
You get lenders competing for a 504 refinance by presenting one complete file, with the note, payment history, use-of-proceeds trace and occupancy, to the bank and CDC lender types that refinance owner-occupied buildings, then comparing the first-mortgage terms side by side before committing to one.
YieldStack is a commercial mortgage brokerage, not a lender. It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed. Submit your refinance and the deal team will route it to the SBA and conventional lender types whose current programs fit an owner-occupied building.
The bottom line
Yes, you can refinance a commercial mortgage with an SBA 504 loan if your business occupies at least 51 percent of the building, has operated for the full two years before applying, and the debt is at least six months old with 75 percent or more of it spent on fixed assets. The bank loan and 504 loan together can reach 90 percent of the collateral's fair market value, and any cash-out is limited to Eligible Business Expenses. Choose it over a bank renewal when a long fixed rate on part of the stack is worth a longer closing, and start early enough that the balloon does not force the decision.