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SBA 504 Loan Calculator

SBA 504 splits loan: 50% bank + 40% CDC + 10% borrower for owner-occupied real estate.

Total project cost

Bank loan %

CDC loan %

Bank rate %

CDC rate %

Term years

Total monthly P&I

$12,471

Borrower equity

$200,000

Blended rate %

0.07%

How the math works

Bank loan + CDC loan + borrower equity = total. Each loan amortizes separately.

$2M: $1M bank + $800k CDC + $200k equity. $7,381 + $5,083 = $12,464/mo total.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

Calculation notes and example

SBA 504 financing structure used here

SBA 504 financing is usually modeled as a bank first mortgage, a CDC/SBA debenture, and borrower equity. Each piece can have a different rate, term, and payment. The combined payment is the key cash-flow number, while the equity requirement shows how much capital the owner needs at closing.

Worked example

For a $1,500,000 owner-occupied building, a 50/40/10 structure could mean $750,000 bank debt, $600,000 CDC/SBA debt, and $150,000 down. If the combined debt service is lower than a conventional loan but closing costs are higher, compare monthly cash flow, upfront cash, and total interest instead of choosing by rate alone.

Edge cases and practical tips

504 loans are commonly used for owner-occupied real estate or major equipment, not every working-capital need.
The bank and CDC portions can price differently, so blended payment matters.
Project costs, eligible soft costs, and contingency reserves affect the true financed amount.

Useful companion tools: SBA 7(a) Loan Calculator, SBA Microloan Calculator, Business Loan Calculator, and Construction Loan Calculator.

How to interpret the sba 504 loan result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this sba 504 loan estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

How to Use

Enter total project cost.
Enter bank loan %.
Enter cdc loan %.
Enter bank rate %.
Enter cdc rate %.
Enter term years.
Read total monthly p&i.

Frequently Asked Questions

SBA 504 vs 7(a)?

504: real estate + equipment only, fixed long-term rates. 50% bank loan, 40% CDC (Certified Development Company) debenture, 10% borrower equity. Bank rate: market. CDC rate: ~5.5–6.5% (10/20/25 yr fixed). Total blended: lower than 7(a). Owner-occupied required: 51%+ owner use of building (60%+ for new construction). 10% down for established business; 15% for new business; 20% for special-purpose property. Job creation: 1 job per $75k of CDC loan. SBA fees ~3.0%. Best for: real estate-heavy small business expansion.

How does this fit small business finance?

Small business owners use this calculator alongside cash flow forecast, P&L, balance sheet, and tax projection. Pair with industry benchmark data (RMA, BizMiner, IBISWorld). Decision framework: ROI > capital cost + risk premium > minimum threshold for owner time. Single calculator output is one input — owner intuition + market knowledge + financial discipline complete the picture.

SBA financing fit?

SBA 7(a): up to $5M, working capital, equipment, real estate, business acquisition, longer terms. SBA 504: real estate + equipment, fixed rate, 10–25 years. SBA Express: up to $500k, faster. SBA Microloan: up to $50k. Owner-occupied real estate (51%+ owner use) qualifies. Personal guarantee required. SBA fees: 2–3.75% of guaranteed portion.

When is this worth pursuing?

Small business decisions weighing capex, hiring, expansion, financing should consider: ROI threshold (typically 20%+ for owner risk), payback period (under 3 years preferred), cash flow coverage, opportunity cost vs alternatives. Calculator outputs inform but don't decide — owner judgment about market, competition, and execution capacity is what makes the call.