The pros and cons of an SBA 504 loan vs a conventional commercial mortgage come down to one trade. The 504 lets you buy your building with as little as 10% down and fixes the rate on the CDC's share of the debt, while a conventional loan skips the SBA and CDC fees and involves one lender. We compare the two under the rules in effect on October 6, 2026, then price a $2,000,000 purchase both ways to show when 20% down with a bank is the better deal.
What are the pros and cons of an SBA 504 loan vs a conventional commercial mortgage?
A conventional commercial mortgage is one loan on one lender's terms. A 504 project has three parts: under SOP 50 10 8.1, a bank or other third party lender generally provides 50% or more of the financing, a CDC (Certified Development Company) provides up to 40% through a debenture that SBA guarantees in full, and the borrower injects at least 10%.
| SBA 504 | Conventional commercial mortgage | |
|---|---|---|
| Down payment | At least 10%. 15% for a new business (2 years or less) or a limited or special purpose property, 20% for both | Bank policy |
| Loan to value | Bank loan of 50% or more plus a CDC loan of up to 40% | Bank's own limit, which should not exceed 85% for improved property |
| Rate | CDC loan: fixed, set when the debenture is sold. Bank loan: the bank's rate, which must be reasonable and within a maximum SBA publishes | Negotiated |
| Term | CDC loan: 10, 20 or 25 years (25 maximum for real estate). Bank loan: at least 10 years beside a 20- or 25-year CDC loan | Bank policy |
| Fees | SBA, CDC, funding and underwriter fees financed into the CDC loan, ongoing service fees, a 0.50% participation fee and the bank's fees | The bank's fees |
| Prepayment | CDC loan: declining premium in years 1 to 10 of a 20- or 25-year loan. Bank loan: per its note | Per the note |
| Closing | Two lenders, SBA approval, a monthly debenture sale | One lender, one approval |
| Eligibility | Operating, for-profit small business occupying at least 51% of an existing building or 60% of new construction | Bank credit policy |
Read as pros and cons, the 504's strengths are the smaller down payment, a CDC rate fixed for up to 25 years, and a bank loan that 13 CFR 120.921 bars from carrying an early call or demand feature unless you default. Its drawbacks are added fees, a 10-year prepayment premium, a longer path to closing and program rules a bank-only loan doesn't carry. A conventional mortgage reverses each of those points: more cash down, fewer fees and rules.
What LTV, rates and terms to expect from a conventional bank loan in 2026
No federal program sets conventional terms. Each bank writes its own real estate lending policy, and the banking agencies' interagency guidelines (12 CFR Part 365, Appendix A, read October 6, 2026) list what it should address: maximum loan amounts and maturities by property type, amortization schedules, pricing and loan-to-value limits.
The guidelines also set supervisory ceilings for insured banks and savings institutions. A bank's internal limit should not exceed 85% for improved property, which includes completed commercial property, 80% for commercial construction, 75% for land development and 65% for raw land. For a loan to buy an existing property, value means the lesser of the actual acquisition cost or the estimate of value. A 20% down payment on an owner-occupied building, or 80% LTV, is therefore a lender's policy choice under the 85% ceiling.
Rate, fixed period, amortization, balloon date, prepayment charge and guarantees are the bank's call too. Lenders often quote a spread over an index such as the prime rate, which was 7.00% on October 5, 2026 (WSJ prime rate), so the written quotes you collect are the benchmark.
One $2,000,000 building priced both ways
Under the pricing steps in SOP Section C, Chapter 3, the $800,000 CDC loan picks up the 0.50% SBA guaranty fee from the fiscal 2027 fee notice ($4,000, waived for manufacturers, listed food supply chain businesses and rural businesses), a 0.25% funding fee ($2,000), a CDC processing fee at its 1.5% maximum ($12,000) and an assumed $2,500 of closing costs. Dividing the $820,500 total by 0.996 to cover the 0.4% underwriter's fee and rounding up to the next thousand gives an $824,000 debenture. The $24,000 added to the loan (fees plus $204 of rounding that goes back to the borrower) is 3% of the $800,000, in line with the "approximately 3% of the debt" on SBA's 504 loans page. We also charged the borrower SBA's 0.50% participation fee on the bank loan ($5,000), which the bank, CDC or borrower may pay.
| Conventional, 20% down | SBA 504, 10% down | |
|---|---|---|
| Down payment | $400,000 | $200,000 |
| Fees paid in cash | $16,000 | $15,000 |
| Fees financed | $0 | $24,000 |
| Cash needed at closing | $416,000 | $215,000 |
| Total borrowed | $1,600,000 | $1,824,000 |
| Monthly payment | $11,824 | $12,954 |
| Owed after 10 years | $1,275,480 | $1,435,869 |
The 504 leaves $201,000 more cash in the business on day one. In return you pay about $22,800 more in fees and about $1,130 more each month, and you owe about $160,400 more after 10 years. Treat that as borrowing $201,000 and repaying it through the higher payments and the larger year-10 balance, and it costs about 5.2% a year. That's below both note rates because the 504 also shifts $600,000 of debt from the bank's 7.50% to the CDC's 6.50%.
The answer is sensitive to that gap. With the CDC loan at 7.50% all-in, the same cash costs about 9.2% a year. Set the figure against what the cash would earn in the business, or what a line of credit would cost to replace it.
At year 10 the conventional borrower must refinance or pay off $1,275,480 at whatever rates apply then. The 504 borrower has $797,175 coming due, while the CDC balance of about $638,700 keeps its fixed rate through year 25.
What a 504 adds before and after closing
A 504 purchase puts two lenders and SBA in the deal. The bank's letter of intent or commitment must be in place at application, and the CDC loan is funded by a debenture that is normally sold once a month. An interim lender carries the CDC's share from SBA approval until that sale, and the debenture rate isn't final until then. Timing depends on the CDC, the bank and SBA's workload, so get current estimates in writing before you accept a financing deadline.
The SOP also sets underwriting floors: historical debt service coverage of at least 1.15 to 1 (or an analysis of projections when history falls short), an unlimited personal guaranty from each owner of 20% or more, and an economic development objective such as one job opportunity created or retained per $95,000 that SBA guarantees, roughly nine on an $824,000 debenture.
SBA Form 1504 also sets a repurchase premium on 20- and 25-year debentures: the remaining balance, times the debenture's stated rate, times a factor that starts at 1.00 in year 1 and drops 0.10 a year to zero in year 11. A sale in year 3, with about $788,000 outstanding and a stated rate assumed at 5.50%, would add about $34,700 before any charge in the bank's note.
When a 20% down conventional loan wins
- You may sell or refinance within a few years. A year-3 sale in the example carries about $57,500 of 504-only cost ($22,800 of fees plus the $34,700 premium) for 30 months' use of $201,000.
- The seller wants a fast, certain close. One lender and one approval leave fewer places for a deadline to slip.
- Your 504 contribution would be 15% or 20%. The SOP's examples of limited or special purpose property include hotels, gas stations, car washes and medical facilities. At 20% the 504 saves almost no cash here and still adds its fees.
- You'll occupy less than 51% of the building, or it's an investment property. SBA lists speculation or investment in rental real estate as an ineligible use.
- Cash isn't your constraint. If the extra $201,000 would sit idle, putting it into the building avoids the 504's fees and the larger debt.
The 504 earns its fees when that cash has work to do, such as hiring, equipment or inventory, when you expect to hold past year 10, and when a fixed rate on about 45% of the debt matters to you. See our 504 requirements and 504 rates guides.
How to get quotes you can compare
Ask every lender for the same items so the offers line up:
- Down payment and maximum LTV.
- Rate, how long it's fixed, amortization and maturity.
- Every fee, split into cash at closing and financed.
- The prepayment charge in each year.
- For a 504, the CDC's estimated debenture rate and expected time to SBA approval.
EQ Funding isn't a lender. One application reaches lenders that compete for your deal across SBA and conventional structures, and each lender assesses your credit and repayment ability and sets its own approval and terms. Start with SBA loans or commercial real estate financing.