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SBA 504 Calculator

Calculators

SBA 504 Loan Calculator

Estimated SBA 504 Loan Structure

Bank Loan (1st Mortgage) $0 50% of project
SBA 504 Loan (2nd Mortgage) $0 40% of project + fees
Your Down Payment (Equity) $0 10% minimum required
Bank Monthly Payment $0 Principal + Interest
SBA 504 Monthly Payment $0 Fixed rate fully amortized
Total Monthly Payment $0 Both loans combined
Blended Interest Rate 0% Weighted average of both loans
Total SBA Fees Financed $0 2.65% + legal fees included in loan
This calculator provides estimates based on standard SBA 504 program parameters. Actual loan terms, rates, and fees vary by Certified Development Company (CDC), participating lender, and project specifics. SBA 504 loans require personal guarantees from owners of 20% or more. Prepayment penalties apply during first half of loan term. Consult your CDC and lender for exact figures. Current rates change monthly with debenture sales.

What Is an SBA 504 Calculator?

An SBA 504 calculator is a tool that estimates how a project is split between a bank loan, SBA-backed loan, and borrower equity under the SBA 504 program.

This type of financing typically follows a 50-40-10 structure. That means 50% comes from a bank, 40% from the SBA through a Certified Development Company (CDC), and 10% from the borrower. However, this can change depending on business type and property risk.

The calculator also factors in SBA fees, interest rates, loan terms, and project costs. It helps you answer key questions like: How much do I need to put down? What will my monthly payment be? And what is my blended interest rate?

How the SBA 504 Loan Calculation Works

The calculator follows the exact structure used in SBA 504 financing :contentReference[oaicite:0]{index=0}. It first splits your project cost into three parts: bank loan, SBA loan, and equity. Then it adds fees and calculates monthly payments for both loans.

Bank Loan=Project Cost×Bank %100\text{Bank Loan} = \text{Project Cost} \times \frac{\text{Bank \%}}{100}
SBA Base=Project Cost×SBA %100\text{SBA Base} = \text{Project Cost} \times \frac{\text{SBA \%}}{100}
Equity=Project Cost×Equity %100\text{Equity} = \text{Project Cost} \times \frac{\text{Equity \%}}{100}
SBA Fees=(SBA Base×0.0265)+Legal Fees+Soft Costs\text{SBA Fees} = (\text{SBA Base} \times 0.0265) + \text{Legal Fees} + \text{Soft Costs}
SBA Total=SBA Base+SBA Fees\text{SBA Total} = \text{SBA Base} + \text{SBA Fees}

Monthly payments are calculated using the standard amortization formula for both the bank loan and SBA loan.

M=P⋅r(1+r)n(1+r)n−1M = \frac{P \cdot r (1+r)^n}{(1+r)^n – 1}

Where:

  • M = monthly payment
  • P = loan amount
  • r = monthly interest rate
  • n = total number of payments

Example: Suppose your project costs $1,000,000. If you qualify for a 50-40-10 structure:

  • Bank loan = $500,000
  • SBA base = $400,000
  • Equity = $100,000

If SBA fees are 2.65% plus $2,500 legal costs, your SBA total increases. That affects your monthly payment and blended rate.

The calculator also adjusts equity if the SBA loan exceeds program limits, and it flags minimum project size or higher equity requirements.

How to Use the SBA 504 Calculator: Step-by-Step

  1. Enter your total project cost, including real estate, construction, or equipment.
  2. Select your business type and property type to set the correct equity and SBA percentages.
  3. Choose the project type to apply the correct SBA loan cap ($5M or $5.5M).
  4. Input the bank loan interest rate and select the loan term in years.
  5. Enter the SBA effective rate and choose its term (10, 20, or 25 years).
  6. Add legal fees and any soft costs like appraisals or environmental reports.
  7. Click “Calculate” to see your loan breakdown and monthly payments.

The results show your bank loan amount, SBA loan total (including fees), required down payment, monthly payments, and blended interest rate. Use these numbers to evaluate affordability and compare financing options.

When Should You Use This Calculator?

Planning a Commercial Real Estate Purchase

If you’re buying or building property, this tool helps estimate your SBA 504 loan structure. It shows how much cash you need upfront and what your monthly debt service will look like.

Comparing Financing Options

Many borrowers compare SBA 504 loans with conventional commercial loans. This calculator helps you see the benefit of lower down payments and long-term fixed SBA rates.

Understanding Equity Requirements

Equity can range from 10% to 20% depending on risk factors. Startups, special-use properties, or repeat projects require higher contributions. The calculator adjusts this automatically.

Avoiding Common Mistakes

Many borrowers forget to include SBA fees or soft costs. Others assume the SBA portion is always 40%. This tool corrects those assumptions and warns you if limits are exceeded.

It also highlights when your SBA loan goes above program caps, which increases your required equity.

Frequently Asked Questions

What is the typical SBA 504 loan structure?

The typical SBA 504 structure is 50% bank loan, 40% SBA loan, and 10% borrower equity. However, startups or special properties may require 15% to 20% equity instead of 10%.

How are SBA 504 monthly payments calculated?

Monthly payments are calculated using a standard loan amortization formula based on loan amount, interest rate, and term. The SBA portion is fully amortized at a fixed rate.

What fees are included in an SBA 504 loan?

SBA 504 loans include a 2.65% fee on the SBA portion, plus legal and soft costs. These fees are usually financed into the loan instead of paid upfront.

What is the maximum SBA 504 loan amount?

The SBA portion is typically capped at $5 million. Certain projects like manufacturing or green energy can qualify for up to $5.5 million.

What is a blended interest rate?

A blended interest rate is the weighted average of your bank loan rate and SBA loan rate. It gives you a single rate to understand your total borrowing cost.

Is the SBA 504 loan rate fixed?

The SBA portion is fixed for the entire term, usually 20 or 25 years. The bank loan may have a fixed or variable rate depending on the lender.