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A/R Aging Report Guide1031 Exchange GuideLOC GuideSBA 7(a) GuideSBA 504 GuideSection 179 GuideSelling a Business
Setting an Asking PriceUsing a Business BrokerSelling a Business During DivorceSelling a Failing BusinessTransferring Intellectual PropertyPreparing an Online Business for SalePreparing for Sale, Two Years OutSelling a Business QuicklyWriting a Selling MemorandumSelling a Business Step by StepSelling a Business With DebtChanges Worth Making Before SellingThe SBA 504 is not one loan -- it is two. Our calculator models both the bank first lien and the CDC/SBA debenture separately, with individual rates, terms, amortization schedules, and fee structures. This guide explains every input, every output, and every number the calculator produces.
The SBA 504 is a fixed-asset financing program designed specifically for businesses purchasing commercial real estate, heavy machinery, or long-lived equipment. Unlike the SBA 7(a), the 504 is a partnership between a conventional lender and a Certified Development Company (CDC) -- a nonprofit intermediary licensed by the SBA.
The defining feature of the 504 is the CDC debenture: a fixed-rate, long-term loan from the SBA/CDC at below-market rates, funded by SBA-guaranteed debentures sold to institutional investors. This fixed rate is set monthly by the SBA and is typically 100-200 basis points below what a conventional lender would charge for the same term.
The program's purpose is to encourage small business investment in fixed assets -- particularly commercial real estate -- by making long-term fixed-rate financing accessible at rates that compete with larger institutional borrowers. The SBA guarantees the CDC debenture 100%, making it essentially risk-free for investors and allowing the SBA to offer rates unavailable through the private market.
The rule that disqualifies more projects than any other
You must occupy at least 51 percent of an existing building, or 60 percent of new construction. Below that threshold a 504 is unavailable however strong the borrower or the project. It is a design decision rather than an underwriting judgement, so there is nothing to negotiate — and it ends more 504 conversations than the rate or the deposit ever do. If your business will fill 40 percent of the square footage and tenants the rest, this is a conventional mortgage.
Ownership narrowed on 1 March 2026
Under Policy Notice 5000-876441, 100 percent of direct and indirect owners must be US citizens or US nationals with principal residence in the United States, its territories or possessions. Lawful permanent residents can no longer hold any interest, reversing the previous position. This applies to 504 exactly as it does to 7(a). Map the whole ownership chain before spending on appraisals.
Since 4 July 2026, a 504 and a 7(a) can stack
Policy Notice 5000-879058 decoupled the two programmes for loan-limit purposes, so an outstanding 7(a) balance no longer reduces what is available under 504. An eligible borrower can hold up to $5,000,000 of each, $10,000,000 in total — useful where a deal is a building plus a business, since 504 cannot fund goodwill or working capital and 7(a) can. The debenture ceiling is $5,500,000 for small manufacturers and qualifying public policy projects. The 7(a) is expected to be approved first.
The 504 is NOT a single loan
Every SBA 504 project involves two separate loans from two separate lenders with two separate payments, two closing processes, and two distinct debt instruments. The bank first lien and the CDC debenture coexist as separate obligations. Our calculator models them individually because conflating them into a single blended rate understates the true complexity and hides the benefit of the fixed CDC rate.
Every SBA 504 project has exactly three funding sources. Understanding each is essential to using the calculator correctly.
Tranche 1 -- Bank First Lien
~50% of project
Senior-secured. Bank has priority claim on collateral in default.
Tranche 2 -- CDC / SBA Debenture
~40% of project
Junior-secured. CDC/SBA is second in line on collateral.
Why the bank takes the shorter term
Banks participating in SBA 504 are in second-lien position only until their loan is paid off. They mitigate their risk by taking a shorter term (typically 10 years max) on a larger portion of the loan. After the bank lien is retired, the CDC/SBA debenture continues for its full term. In our calculator, after the bank payoff year, the combined payment drops to just the CDC monthly amount.
The 504 program's three funding layers create a specific capital structure for every project. The percentages can vary slightly based on business type, but the 50/40/10 split is the standard for established businesses.
Standard SBA 504 capital stack -- $1,000,000 project example
| Business type | Bank portion | CDC portion | Borrower (down) | Notes |
|---|---|---|---|---|
| Established business (2+ yr) | 50% | 40% | 10% | Standard structure for most projects |
| Startup (< 2 years old) | 50% | 35% | 15% | Higher equity required due to unproven track record |
| Special-use property | 50% | 30% | 20% | Car washes, gas stations, hotels, marinas, golf courses |
| Energy-efficient projects | 50% | 50% | 0% | Public policy goal -- no borrower equity required in some cases |
The "CDC portion" slider in our calculator
Our calculator defaults to 40% CDC / 50% bank / 10% borrower. You can adjust the CDC percentage (30-50%) using the "CDC % of loan" slider in the SBA 504 accordion. This changes the bank and CDC loan amounts and updates all payment, cost, and amortization outputs. For startups, change CDC % to 35%. For special-use properties, use 30%.
The 504 has stricter eligibility requirements than the 7(a) -- particularly around asset type and business history. The primary gate: the loan must finance a fixed asset that will serve as collateral.
Credit score minimum
680+
Slightly higher than 7(a). Both lenders (bank and CDC) underwrite separately. Typically 680 minimum; 700+ for best positioning with both lenders simultaneously.
Fixed asset requirement
Required
Must finance commercial real estate, heavy equipment, or other long-lived fixed assets. The assets serve as collateral for both loans. Working capital, goodwill, and inventory cannot be financed with 504.
Business age
2+ years preferred
Startups are technically eligible but face 15% down vs 10%, stricter underwriting, and a harder time satisfying both the bank and CDC simultaneously. Many CDCs prefer 2+ years of operating history.
DSCR minimum
1.25x (combined)
DSCR is measured against the combined payment from both tranches. Our calculator shows the combined DSCR. Both the bank and CDC underwrite their piece independently, but both need the global DSCR to pass.
Business size limits
Net income < $6.5M
Average net income after federal taxes must be under $5M for the past 2 years, OR total business net worth must be under $20M. Most operating businesses easily qualify on one or both tests.
Job creation / public policy
1 job per $90K
Historically, 504 required creating/retaining 1 job per $90K of CDC loan. Alternatively, the project must meet a public policy goal (energy efficiency, veteran-owned, rural area, export). Most real estate acquisitions satisfy job tests or policy goals easily.
Cannot use 504 for working capital
This is the most common 504 mistake. The SBA 504 program cannot finance working capital, goodwill, accounts receivable, or inventory under any circumstances. If your project includes any of these -- even a small portion -- the eligible fixed-asset component must be separately identified and the rest funded elsewhere. For mixed-use projects, SBA 7(a) is typically the better choice.
Most SBA 504 calculators blend the bank and CDC rates into a single payment. Ours does not. We compute two independent fully-amortizing loans and display their individual payments, interest totals, and amortization schedules.
Bank first lien payment
P_bank = Loan × (1 - CDC%) -- e.g., $750K loan × 60% = $450K bank portion
PMT_bank = P_bank × (r_bank × (1 + r_bank)^n_bank) / ((1 + r_bank)^n_bank - 1)
r_bank = bank rate / 12 | n_bank = bank term in months (typically 120 for 10 years)
CDC / SBA debenture payment
P_CDC = Loan × CDC% -- e.g., $750K loan × 40% = $300K CDC portion
PMT_CDC = P_CDC × (r_CDC × (1 + r_CDC)^n_CDC) / ((1 + r_CDC)^n_CDC - 1)
r_CDC = CDC rate / 12 (FIXED -- does not change) | n_CDC = 240 (20 yr) or 300 (25 yr)
Combined monthly obligation
Combined PMT = PMT_bank + PMT_CDC
This is what you budget for. After the bank lien retires (typically year 10), combined PMT drops to PMT_CDC only -- often a significant reduction in monthly obligation. Our amortization table highlights this transition year.
DSCR (debt service coverage ratio)
DSCR = Annual EBITDA / ((PMT_bank + PMT_CDC) × 12)
Both lenders underwrite DSCR against the combined payment. A DSCR of 1.25x on the combined obligation means your cash flow covers both payments with 25% cushion. The bank may have a slightly different standard (1.20-1.30x), and the CDC uses 1.25x.
| Field | What it is | Where to find it | Default |
|---|---|---|---|
| Bank interest rate (%) | The rate on the bank's first lien. This is negotiated with the bank directly -- SBA does not set this rate. Typically 0.5-1% above what the same bank would charge conventionally, compensating for the subordinated position behind the CDC. | Your bank's term sheet or pre-qualification letter | 7.5% |
| CDC interest rate (%) | The SBA debenture rate. Fixed for the entire loan term. Set monthly by the SBA based on 10-year or 20-year Treasury yields plus a spread. Cannot be negotiated -- all 504 borrowers get the same SBA rate for their closing month. | SBA.gov, NADCO.org, or your CDC's current rate sheet | 6.1% (see note) |
| Term (years) | The CDC debenture term. The bank term is auto-set to the lesser of this term or 10 years. Standard options: 10, 20, or 25 years. Real estate typically qualifies for 25 years; equipment for 10 or 20 years. | Project type determines max term | 20 yr |
| CDC % of loan | What percentage of the total loan amount the CDC debenture covers. Default is 40%. Adjust to 35% for startups, 30% for special-use properties. Moving this slider changes both the bank and CDC payment amounts in real time. | Determined by business type and project classification | 40% |
| SBA guarantee fee ($) | The SBA's one-time fee on the CDC portion of the loan. Approximately 0.5% of the CDC loan amount. This fee is charged by the SBA (not the CDC or bank) on the guaranteed debenture. For a $300,000 CDC portion, this is approximately $1,500. | CDC or SBA fee schedule at application | $4,500 |
| CDC packaging fee ($) | The CDC charges a flat packaging and processing fee for underwriting and closing the debenture. This is separate from the SBA fee. Typically $2,500 to $4,500. Some CDCs charge as a percentage of the CDC loan. | Your CDC's fee disclosure at application | $3,500 |
| Bank origination fee ($) | The conventional bank's origination charge on its first lien. Negotiated independently of the CDC process. Typically 0.5-1.5% of the bank loan amount. This appears in the bank's commitment letter. | Bank commitment letter or term sheet | $7,500 |
The 504 has three distinct fee sources because three parties are involved. Our calculator lets you enter each separately, automatically assigns bank fees to the bank tranche and CDC fees to the CDC tranche, and shows the total fee load clearly.
| Fee | Charged by | On what portion | Typical amount | Tranche assigned to |
|---|---|---|---|---|
| SBA guarantee fee | SBA (billed through CDC) | CDC portion | ~0.5% of CDC loan | CDC tranche |
| CDC packaging fee | Certified Development Company | CDC portion | $2,500 -- $4,500 flat | CDC tranche |
| Bank origination fee | Commercial bank / lender | Bank portion | 0.5 -- 1.5% of bank loan | Bank tranche |
| Appraisal | Appraiser | Project cost | $3,500 -- $15,000+ | Out of pocket |
| Environmental Phase I | Environmental firm | Property | $1,500 -- $3,500 | Out of pocket |
| Title / closing | Title company / attorney | Entire project | $2,000 -- $8,000+ | Out of pocket |
No ongoing annual SBA fee
Unlike the SBA 7(a), which charges an annual 0.55% ongoing guarantee fee on the outstanding balance, the SBA 504 has no annual ongoing SBA fee. All fees are paid upfront. This makes the 504 more cost-efficient over long hold periods despite higher upfront fees than conventional -- a key advantage the interest savings panel in our calculator quantifies.
The prepayment penalty decides short-hold deals
The debenture carries a declining prepayment penalty for ten years on a 20 or 25-year term, and five on a ten-year term, falling by roughly a tenth of the note rate each year. The bank first mortgage has its own terms on top. If you are buying to hold it never costs you anything. If you might outgrow the site or sell within a decade, price it before you sign — it can outweigh both the rate advantage and the lower deposit.
The CDC/SBA debenture rate is the 504 program's most powerful feature. It is set monthly by the SBA, fixed for the life of the loan, and consistently below what conventional lenders charge for the same term.
The rate is derived from the 10-year or 20-year Treasury yield plus a spread of approximately 0.38%. As at 9 July 2026 the debenture priced at 6.2 percent on the twenty-year term and 6.172 percent on the twenty-five; twenty and twenty-five year debentures price every month, ten-year debentures only in odd-numbered months. The 6.1 percent default in the calculator is illustrative and should be replaced with your CDC’s current rate sheet. The SBA pools approved 504 debentures and sells them as government-guaranteed securities to institutional investors -- the demand for these safe, government-backed instruments keeps the spread tight. The result is a rate that is typically 100-200 basis points below a commercial lender's 20-year fixed rate on a comparable project.
CDC rate structure (approximate)
CDC Rate = 10-yr or 20-yr Treasury yield + 0.38% SBA spread + CDC servicing
The SBA publishes current effective debenture rates at sba.gov. Find your CDC's current rate at NADCO.org. The rate in effect at closing is locked for the full term -- it does not adjust. This is the primary financial argument for 504 over conventional for long-term real estate.
On a 20-year loan, even a 1% rate difference on the CDC portion compounds into a substantial interest savings. Our calculator's "vs. conventional same term" comparison in Section C quantifies this: it takes your current conventional rate, applies it to the full loan for the same term as the 504, and shows the total interest difference.
Example: If the conventional rate is 8.5% and the CDC rate is 6.1% on a $300,000 CDC portion (40% of $750,000) over 20 years, the interest savings is approximately $84,000 over the life of the CDC loan -- not including the payment certainty benefit of a fixed rate in a rising-rate environment.
Lock in before rates move
The CDC rate is fixed at the debenture sale date, which typically occurs 1-3 months after your project closes. You will get a slightly different rate than what is quoted at application. In a rising rate environment, the fixed CDC rate becomes more valuable every month. In our calculator, you can model the interest savings at different conventional rate scenarios by adjusting the conventional rate field.
Because the 504 is two loans, Section D of our calculator produces two separate year-by-year amortization schedules -- bank and CDC side by side -- and a combined column showing total annual obligation.
The most important row in the amortization table is the bank payoff year -- typically year 10. In that row and all subsequent rows, the bank interest column shows "paid off" and the combined payment drops from the full combined amount to just the CDC payment. This payment reduction can be significant -- often $1,500 to $4,000 per month on a $1M project -- and represents a built-in cash flow improvement that conventional loans never provide.
How to read the 504 amortization table
Columns: Year | Bank Interest | Bank Principal | Bank Balance | CDC Interest | CDC Principal | CDC Balance | Combined Payment
Years 1-10 (with 10-yr bank term): All columns have values. Combined payment = bank payment + CDC payment.
Year 11+: Bank columns show "--". Combined payment drops to CDC-only amount. CDC balance continues declining toward zero at year 20 or 25.
The shading on year 11+ rows in our calculator highlights this transition. The footnote below the table shows the exact dollar amount the payment drops and the number of remaining CDC-only years.
The 504's fixed-rate, long-term CDC debenture creates the most value in specific situations. Use this checklist before opening the calculator.
| Scenario | 504 fit | Why |
|---|---|---|
| Buying commercial real estate you will occupy | Excellent | Long-term fixed rate on 40% of the purchase price creates certainty for 20-25 years. Owner-occupied CRE is the 504's primary use case. |
| Purchasing heavy machinery / manufacturing equipment | Strong | Long-lived equipment qualifies; 10-20 year terms available. Fixed rate on CDC portion reduces long-term cost vs. equipment finance at variable rates. |
| New construction of owner-occupied building | Strong | Construction loans can convert to permanent 504 financing. Often the most cost-effective long-term structure for new buildings. |
| Business acquisition with significant real estate | Partial | The real estate component can be 504; the goodwill and working capital must be financed separately (SBA 7(a) or conventional). Dual-loan structure adds complexity. |
| Business acquisition -- primarily goodwill | Poor fit | Cannot finance goodwill. All-7(a) or conventional acquisition loan is the right structure. |
| Working capital only | Ineligible | SBA explicitly prohibits working capital in 504. Use 7(a) or a line of credit. |
| Rate-sensitive long-term borrower | Excellent | The 25-year fixed CDC rate eliminates rate risk on 40% of the project for the full term. In a rising-rate environment, this certainty has compounding value. |
| Startup (under 2 years) | Possible | Eligible but harder. 15% down required, stricter underwriting, and many CDCs limit exposure to startups. Strong business plan and personal credit are critical. |
Our comparison calculator scores all three programs for your specific profile. Use this decision framework to understand the reasoning behind the scores.
Does your use include working capital, goodwill, or AR?
If yes: 504 is eliminated. Choose between SBA 7(a) (if you need government backing) or conventional (if you have strong credit and full collateral). The 7(a) can finance mixed-use projects; the 504 cannot.
Is the primary use commercial real estate or heavy equipment?
If yes: run both 7(a) and 504 in our calculator. The 504 typically wins on total cost for long-hold CRE due to the fixed CDC rate. The 7(a) wins if you have a mixed-use project, plan to refinance within 10 years, or need a single closing.
Do you have 720+ credit and full conventional collateral (LTV 75% or better)?
If yes: conventional may be competitive, especially for shorter hold periods where the CDC rate advantage doesn't fully compound. Conventional also closes faster (21-45 days vs. 60-120 for 504).
How long will you hold the property or use the equipment?
Hold period is the 504's strongest argument. The fixed CDC rate over 20-25 years creates interest savings that compound over time. If you plan to sell or refinance within 5-7 years, the savings may not offset the higher closing costs and two-closing complexity of 504.
Can you manage two payments per month?
This is a practical consideration that is often overlooked. The 504 requires two separate monthly payments to two separate lenders. Some borrowers find this cumbersome; others consider it minor. Make sure your accounting system and cash flow management can accommodate it cleanly.
The 504 is more complex to close than a 7(a) because two separate institutions are underwriting simultaneously. Timeline: 60-120 days from application to funding. Here is what to expect.
Pre-qualify with the calculator -- verify the 504 structure
Confirm the combined DSCR is 1.25x+, you have 10% down (15% if startup), the use is a fixed asset, and the CDC debenture term (20 or 25 yr) matches your project type. Calculate your interest savings vs. conventional to confirm the 504 makes financial sense for your hold period.
Find a CDC and a participating bank
CDCs are regional nonprofits licensed by the SBA. Use the SBA's directory (sba.gov/cdc-lender-directory) to find CDCs in your market. Many banks have preferred CDC relationships. The bank and CDC must coordinate -- ideally introduce both parties early so underwriting can proceed in parallel.
Two simultaneous underwriting processes
The bank underwrites its first lien under its own standards. The CDC underwrites the debenture under SBA guidelines. Both need: 3 years business tax returns, 3 years personal tax returns, YTD financials, personal financial statement, appraisal, environmental report, and purchase/project agreement. This dual underwriting is why 504 takes longer than 7(a).
SBA authorization
The CDC submits its package to the SBA for authorization (typically 5-15 business days after CDC approval). SBA issues a Loan Authorization document specifying all terms. The bank can close independently once both approvals are in hand.
Two closings (or one coordinated close)
The bank loan closes at a title company in the standard commercial real estate manner. The CDC debenture closes separately -- the CDC issues the debenture and it is purchased by the SBA's debenture pool (SBIC/SBA). In some markets, both closings occur simultaneously; in others, the bank closes first and the CDC follows within 30 days.
Debenture funding and first payments
Once the CDC debenture is sold into the pool (typically within 2-4 weeks of closing), funds are released to the project. You then have two separate loan accounts: one with your bank (first payment typically 30 days after bank closing) and one with the CDC/SBA servicer (first payment set per debenture terms, often 45-60 days after closing).
Why does our calculator show two separate monthly payments for the 504?
Because that is the reality of an SBA 504 loan. You will receive two separate loan documents, make payments to two separate lenders (your bank and the CDC servicer), and manage two amortization schedules. Most calculators blend these into a single "blended" payment, which understates the complexity and hides the fixed-rate advantage of the CDC tranche. Our calculator models each independently so you can see the actual bank payment, actual CDC payment, combined total, and what happens to your payment after the bank lien is retired.
What is the CDC and how is it different from the SBA or the bank?
A Certified Development Company (CDC) is a nonprofit organization licensed by the SBA to deliver the 504 program in a specific geographic area. The CDC originates, underwrites, and services the SBA debenture on behalf of the SBA. CDCs do not use their own capital -- they package the debenture and the SBA sells it to institutional investors. The bank is a completely separate institution making its own first lien with its own capital and underwriting. The SBA is the guarantor and policy-setter, not a direct lender.
Can the CDC interest rate change after I close?
No. The CDC debenture rate is fixed at the time the debenture is sold -- which typically occurs 30-90 days after your project closes. The rate you receive is fixed for the entire 20 or 25-year term, regardless of what happens to interest rates afterward. This is the core financial value of the 504 program over long hold periods. The bank first lien rate is separate and may be variable.
Why is my combined 504 monthly payment sometimes higher than a 7(a) at the same loan amount?
Two reasons: (1) The bank first lien in a 504 typically has a shorter term (10 years) than a 7(a) (up to 25 years for real estate), which increases the bank tranche payment. (2) The 504 is designed for long-term hold scenarios -- the total cost advantage accrues over 20-25 years, not in the monthly payment. The monthly comparison favors the 504 mainly when the CDC portion's fixed rate is significantly below the 7(a) variable rate AND the bank term equals the 7(a) term. Use Section C's interest savings analysis to see the long-term cost advantage.
Does the 504 have a prepayment penalty?
Yes -- the CDC debenture has a prepayment premium for the first 10 years of the loan. The premium starts at approximately 5x the monthly interest in year 1 and declines by approximately 1/10 per year until it reaches zero at year 10 or half the remaining term (whichever is earlier). After year 10, there is no prepayment penalty on the CDC debenture. The bank first lien prepayment terms are negotiated separately with your bank. This is an important consideration if you plan to sell the property within 10 years.
What happens to the 504 payments after the bank lien is paid off?
After the bank lien retires (typically at year 10 for a 10-year bank term), you stop making the bank payment and only continue paying the CDC debenture. This can reduce your combined monthly payment substantially -- often by 40-60% of the original combined amount. Our amortization table highlights this transition year and the footnote shows the exact amount the payment drops. This built-in payment reduction is a significant cash flow benefit in years 11+ that conventional loans never provide.
Can a seller note substitute for the 10% down payment?
Yes, in limited circumstances. The SBA allows seller financing to count toward the equity injection requirement IF: (1) the seller note is on full standby for the first 2 years (no principal or interest payments), (2) the note is subordinate to both the bank and CDC, and (3) the seller note does not reduce the combined DSCR below 1.25x when it resumes payments. This structure requires explicit lender approval and is not available in all transactions.