First compare eligible uses
SBA describes 504 as financing major fixed assets that support business growth and job creation. Its program page identifies eligible property and long term machinery, and says 504 cannot be used for working capital or inventory. The 7(a) program page lists a broader set of uses, including working capital, equipment, real estate and changes of ownership. A cheaper loan for an ineligible purpose is not an available alternative.
Separate your project into property, equipment, inventory, professional costs and operating cash. Ask which components can be included under each program. A business that needs both a building and liquidity may need different financing combinations. Comparing only the building portion while omitting a separate working capital facility can make the 504 option appear cheaper than the full funding plan really is.
Understand the 504 project structure
The OCC’s explanation of the 504 program describes a common structure with a bank providing 50% of project cost, a CDC debenture financing up to 40%, and the borrower contributing the balance. The illustration below uses 10% borrower equity, but that is not a promise that every project qualifies for that contribution. Project type and borrower circumstances can require more equity.
There are separate debt components with their own terms. The bank portion can carry a different rate, maturity, balloon or prepayment provision from the CDC portion. SBA lists 10, 20 and 25 year 504 maturities and explains the Treasury relationship behind debenture rates. A lender’s short bank maturity alongside a long debenture can create refinancing risk that a single blended rate hides.
Keep the rate assumption and fee schedule distinct
This site retains prime at 7.00% as of 16 September 2026. Under 13 CFR 120.214, the maximum variable spread for a 7(a) loan above $350,000 is 3% over the applicable base. Using prime as that base produces 10%. A cap is not an offered rate. Smaller loans have different caps, and permitted alternative base rates can require a different calculation.
We have not independently verified a current 504 debenture quote or the FY2027 guaranty and service fee schedules for this guide. We therefore do not label any assumed 504 rate as current market pricing. SBA fiscal schedules change each 1 October. Existing calculator fee figures are unchanged, and a formal comparison needs the notice applicable to approval plus itemized closing expenses for both structures.
Program references and hypothetical comparison inputs
Structural percentages are supported by the OCC program explanation. Except for the 7(a) cap derived from the cited rule and site prime assumption, example rates are hypothetical. Fees are excluded rather than invented.
| Cost item | Amount or range | What it means |
|---|---|---|
| 504 bank share | 50% illustrated | Common project structure described by the OCC, not a universal promise. |
| 504 CDC share | Up to 40% | Program structure reference; actual eligibility and contribution requirements matter. |
| 504 rates in example | 6.5% to 9% assumed | 6.5% CDC rate and 9% bank rate, held unchanged for the calculation. |
| 7(a) rate in example | 10% assumed | Site prime of 7% plus a 3% maximum spread for this loan size. Not a guaranteed offer. |
| Interest comparison | $1,169,043 to $1,553,492 | Hypothetical 25 year debt interest, excluding all fees and other acquisition costs. |
| FY2027 program fees | Not verified here | Use the official current SBA notice. No unverified amount is included. |
Worked example: a $1 million property project
Hypothetical example, not financing offers: project cost is $1 million and borrower equity is $100,000 in both cases. Compare $900,000 of debt over 300 monthly payments. Assume no balloon, no fees and unchanged rates, even though a real bank portion may not have these terms.
- 504 allocation = $500,000 bank debt + $400,000 CDC debt + $100,000 equity. A comparable 7(a) structure uses $900,000 debt plus $100,000 equity.
- Assume the bank rate is 9% and the CDC rate is 6.5%. Starting balance weighted rate = ($500,000 × 9% + $400,000 × 6.5%) ÷ $900,000 = about 7.89%. This is not a disclosed blended APR.
- For each component, monthly payment = balance × monthly rate ÷ [1 less (1 + monthly rate) raised to negative 300]. Bank payment is about $4,195.98 and CDC payment is about $2,700.83.
- Combined 504 monthly payment = about $6,896.81. Using unrounded payments, total interest = ($4,195.981818 + $2,700.828645) × 300 less $900,000 = $1,169,043.14.
- At the assumed 10% 7(a) rate, the same formula gives about $8,178.31 monthly. Total interest = $8,178.306710 × 300 less $900,000 = $1,553,492.01.
- Hypothetical interest difference = $1,553,492.01 less $1,169,043.14 = $384,448.87. Monthly difference is about $1,281.50 before fees.
- Individual nominal annualized rates are 9%, 6.5% and 10%. Compounded effective annual rates are about 9.38%, 6.70% and 10.47% respectively. A combined fee inclusive APR requires solving the combined dated cash flows, not simply averaging these percentages.
The bar comparison deliberately excludes program fees, closing costs and interest changes. It does not establish that 504 always saves this amount. A shorter bank maturity, balloon, variable reset or higher borrower contribution changes the comparison. Ask for both debt schedules, not just a CDC estimate.
Compare costs at your expected sale or refinance date as well as at final maturity. Remaining principal is not a finance charge, but it is part of the cash needed to exit. A prepayment premium can erase some interest savings. The separate early payoff guide explains why the payoff document matters.
What drives the cost up or down
Eligible use determines which program can be considered. Inventory and working capital cannot simply be added to a 504 property model. If separate borrowing is needed, include its cost and payment pressure when comparing complete funding plans. Do not let a narrow eligible project calculation represent the whole business need.
Equity changes both borrowing and liquidity. A higher contribution lowers debt, but using all available cash can leave the business unable to cover opening expenses or a slow period. Compare equal project scope and disclose unequal equity rather than attributing the entire interest difference to program pricing.
The bank portion can dominate flexibility. Its maturity, amortization and renewal conditions may differ from the debenture. A favorable combined starting payment can conceal a large later refinance requirement. Run an exit comparison for any balloon date and show the remaining balance separately from interest.
Closing and payoff expenses need documentation. Appraisals, environmental work, legal fees and program charges can vary by project. We have not established universal ranges for them. Get itemized amounts, confirm what can be financed, and avoid counting the same charge twice in both project cost and finance cost.
Frequently asked questions
Is 504 always cheaper than 7(a)?
No. Rates, bank terms, fees, contribution requirements and intended use differ. The worked example shows one assumed comparison, not a program ranking. A borrower needing working capital may not be able to use 504 for that part of the project at all.
Is the 7(a) 10% figure an APR quote?
No. It is a rate cap calculation for a loan above $350,000 using the site’s prime assumption and a 3% spread. Fees can increase annualized cost, actual pricing can be lower, and variable rates can reset. A cap does not replace an offer.
Can the 504 bank loan have a balloon?
A particular bank contract may have a maturity or payment structure different from the CDC debenture. Check the bank note rather than assuming the entire package amortizes over the debenture term. The example excludes balloons so its interest comparison is easy to audit.
Why not publish the current SBA fees here?
The FY2027 schedule has not been independently verified for this guide. Rather than reuse older fees as current, the comparison excludes them and states the limitation. Use the applicable official SBA notice and actual closing statement before comparing fee inclusive totals.
Does the weighted rate equal effective APR?
No. A starting balance weighted rate summarizes component pricing but ignores fees and how balances decline at different speeds. Calculate a cash flow rate from the combined net funding and scheduled payments for an annualized comparison. Do not label a simple weighted average as a formal disclosure.
Calculators and product details
Calculator results are educational estimates, not quotes. Check whether the payment timing, fee treatment and repayment structure match your document before comparing a result with a disclosed APR. Our methodology explains the existing models and their limitations.
Related guides
- SBA 7(a) loan costs explained
- What equipment financing really costs
- Prepayment penalties and early payoff
Sources
These primary sources support the rules and product mechanics discussed above. Hypothetical examples are our calculations from explicitly stated assumptions, not published offers. Pricing and program schedules change; verify the current document before relying on any figure.
- SBA: 7(a) loans: Official eligible uses and program overview. Current fees require the applicable fiscal notice.
- SBA: 504 loans: Eligible fixed asset uses, available maturities and the Treasury relationship behind debenture rates, with 10, 20 and 25 year maturities.
- OCC: SBA 504 loan program: Explains the bank, CDC and borrower project structure, commonly 50/40/10. This structural reference is from 2018, not a current rate quote.
- eCFR: 13 CFR 120.214: Federal rules for SBA variable rate bases, reset frequency and maximum spreads.
- eCFR: 13 CFR 120.223: Exact maturity, aggregate prepayment threshold and 5%, 3%, 1% subsidy recoupment schedule.