Wondering what your SBA loan payments would be?
Our SBA loan calculator helps you estimate monthly payments, total interest costs, and whether a business generates enough cash flow to cover the loan.
But beyond just using the calculator, this guide explains how SBA loan calculations work so you can plan your business purchase or expansion with confidence.
Use Our Free SBA Loan Calculator
Before we dive into the details, try our calculator:
Calculate Your SBA Loan Payment
Just enter:
- Loan amount you need
- Interest rate (currently around 11.25%)
- Loan term (10 or 25 years)
You'll see:
- Monthly payment
- Total interest over life of loan
- Total amount paid
- Recommended business EBITDA (to qualify)
Takes 30 seconds. Try it now.
How SBA Loan Payments Are Calculated
SBA loans use standard amortization, just like a mortgage or car loan.
The formula: Monthly Payment = P × [r(1 + r)^n] / [(1 + r)^n - 1]
Where:
- P = Principal (loan amount)
- r = Monthly interest rate (annual rate / 12)
- n = Number of payments (years × 12)
Don't worry, you don't need to calculate this yourself. That's what our calculator is for.
Real Examples: What You'd Pay
Let's look at actual payments on common SBA loan amounts:
$500,000 SBA Loan
Scenario: Buying a small business Current rate: 11.25% Term: 10 years
Monthly payment: $6,950 Total interest: $334,000 Total paid: $834,000
Business needs: $175K+ EBITDA to comfortably qualify
$1,000,000 SBA Loan
Scenario: Larger business acquisition Current rate: 11.25% Term: 10 years
Monthly payment: $13,900 Total interest: $668,000 Total paid: $1,668,000
Business needs: $350K+ EBITDA to qualify
$2,000,000 SBA Loan
Scenario: Business with real estate Current rate: 11.25% Term: 25 years (real estate included)
Monthly payment: $20,070 Total interest: $4,021,000 Total paid: $6,021,000
Business needs: $500K+ EBITDA to qualify
Key insight: Longer terms mean lower monthly payments but much more interest paid over time.
What Affects Your SBA Loan Payment?
Three factors determine your payment:
1. Loan Amount
Pretty obvious. Borrow more = pay more.
But here's what people miss: Small changes in loan amount make big differences in payment.
Example:
- $1M loan: $13,900/month
- $900K loan: $12,510/month
- Difference: $1,390/month = $16,680/year
Strategy: If you can negotiate purchase price down $100K, that saves you $1,390/month forever.
2. Interest Rate
Current SBA rates (2026):
- Most loans: Prime + 2.75% = 11.25%
- Some lenders: Prime + 2.25% = 10.75%
- Best rates: Prime + 2% = 10.5%
Impact of 0.5% rate difference on $1M loan:
- At 11.25%: $13,900/month
- At 10.75%: $13,550/month
- Savings: $350/month = $42,000 over 10 years
Shopping around matters. We can help you find the lowest rates.
3. Loan Term
Longer term = lower payment (but more interest total).
$1M loan at 11.25%:
| Term | Monthly Payment | Total Interest | Total Paid |
|---|---|---|---|
| 7 years | $16,500 | $387,000 | $1,387,000 |
| 10 years | $13,900 | $668,000 | $1,668,000 |
| 15 years | $11,600 | $1,088,000 | $2,088,000 |
| 25 years | $10,035 | $2,010,500 | $3,010,500 |
Standard terms:
- Business acquisition only: 10 years
- Real estate included: up to 25 years
- Equipment: up to 10 years
- Working capital: up to 10 years
You don't get to pick any term you want. The SBA sets maximums based on what you're buying.
Understanding Debt Service Coverage Ratio (DSCR)
This is THE most important calculation for SBA loans.
DSCR = Business Cash Flow / Annual Debt Service
What lenders want:
- Minimum: 1.15x
- Preferred: 1.25x
- Excellent: 1.5x+
What it means: 1.25x DSCR = Business makes $1.25 for every $1 of loan payment
Calculate Your DSCR
Example:
- Business EBITDA: $500,000/year
- Loan payment: $13,900/month = $166,800/year
- DSCR = $500,000 / $166,800 = 3.0x (excellent!)
Another example:
- Business EBITDA: $300,000/year
- Loan payment: $13,900/month = $166,800/year
- DSCR = $300,000 / $166,800 = 1.8x (good!)
Final example:
- Business EBITDA: $180,000/year
- Loan payment: $13,900/month = $166,800/year
- DSCR = $180,000 / $166,800 = 1.08x (too low, won't qualify)
Our calculator shows you the DSCR so you know if you qualify before applying.
How Much Business Can You Afford?
Work backwards from DSCR to find maximum loan amount.
Step 1: Start with business EBITDA Let's say the business makes $400,000 EBITDA
Step 2: Apply DSCR requirement Lenders want 1.25x minimum $400,000 / 1.25 = $320,000 maximum annual debt service
Step 3: Calculate monthly payment $320,000 / 12 = $26,667/month
Step 4: Convert to loan amount At 11.25% for 10 years, $26,667/month = ~$1.9M loan
Bottom line: $400K EBITDA business = can support ~$1.9M SBA loan
Quick rule of thumb: Business EBITDA × 4 = rough max loan amount (at 1.25x DSCR)
Down Payment Calculator
SBA loans require 10-15% down payment.
Quick reference:
| Purchase Price | 10% Down | 15% Down | Max SBA Loan (90%) |
|---|---|---|---|
| $500,000 | $50,000 | $75,000 | $450,000 |
| $1,000,000 | $100,000 | $150,000 | $900,000 |
| $1,500,000 | $150,000 | $225,000 | $1,350,000 |
| $2,000,000 | $200,000 | $300,000 | $1,800,000 |
| $3,000,000 | $300,000 | $450,000 | $2,700,000 |
Total cash needed = Down payment + Closing costs (2-4%)
Example on $2M purchase:
- Down payment (15%): $300,000
- Closing costs (3%): $60,000
- Total cash needed: $360,000
Amortization Schedule: How Payments Break Down
Your monthly payment consists of principal and interest.
Early years: Mostly interest Later years: Mostly principal
Example on $1M loan at 11.25%, 10 years:
Year 1:
- Monthly payment: $13,900
- Interest portion: ~$9,375
- Principal portion: ~$4,525
- Remaining balance after year 1: $945,700
Year 5:
- Monthly payment: $13,900 (same)
- Interest portion: ~$6,500
- Principal portion: ~$7,400
- Remaining balance after year 5: $622,000
Year 10:
- Monthly payment: $13,900 (same)
- Interest portion: ~$100
- Principal portion: ~$13,800
- Remaining balance: $0
Key insight: In early years, you're paying mostly interest. Don't expect balance to drop quickly.
Tax Deductions: The Silver Lining
Good news: Interest is tax-deductible as business expense.
Example:
- Annual loan payments: $166,800
- Interest portion (Year 1): ~$112,500
- Your tax rate: 30%
- Tax savings: $33,750/year
After-tax cost of loan: $133,050 instead of $166,800
This is huge. The government is essentially subsidizing 30% of your interest.
Important: Principal payments are NOT deductible. Only interest.
Comparing Loan Scenarios
Use our calculator to compare different options:
Scenario A: Larger loan, shorter term
- $1.5M loan, 10 years, 11.25%
- Payment: $20,850/month
- Total interest: $1,002,000
Scenario B: Smaller loan, longer term
- $1.3M loan, 15 years, 11.25%
- Payment: $15,080/month
- Total interest: $1,414,400
Which is better?
- Scenario A: Higher payment but less total interest
- Scenario B: Lower payment but more total interest
Answer: Depends on your cash flow comfort and long-term plans.
Variable vs Fixed Rates
SBA 7(a) loans:
- Variable rate (tied to Prime)
- Currently Prime + 2.75% = 11.25%
- Adjusts quarterly
How payments change if Prime moves:
If Prime increases 1% (to 9.5%):
- New rate: 12.25%
- $1M loan payment: $14,350 (+$450/month)
If Prime decreases 1% (to 7.5%):
- New rate: 10.25%
- $1M loan payment: $13,450 (-$450/month)
SBA 504 loans:
- Fixed rate (currently ~6.5%)
- Never changes
- More predictable
Use our calculator to model different rate scenarios.
How to Use the Calculator for Business Acquisition
Step-by-step:
1. Find business EBITDA Look at tax returns and financial statements.
2. Calculate purchase price Usually 2.5-4x EBITDA.
3. Determine down payment 10-15% of purchase price.
4. Calculate loan amount Purchase price - down payment = loan amount.
5. Use calculator Enter loan amount, rate (11.25%), term (10 years).
6. Check DSCR Does EBITDA support the payment? Need 1.25x minimum.
7. Adjust if needed If DSCR is too low, reduce purchase price or increase down payment.
Common Calculator Mistakes
Mistake 1: Using wrong interest rate Don't use 5% because that's what you saw online in 2019. Current rates are ~11%.
Mistake 2: Forgetting about down payment $1M business doesn't mean $1M loan. It's $850K-900K after your down payment.
Mistake 3: Not including working capital You need cash after purchase for operations. Don't drain everything for down payment.
Mistake 4: Ignoring personal take-home Loan payment comes out of business EBITDA. What's left for you?
Example:
- EBITDA: $400,000
- Loan payment: $166,800
- Left for owner: $233,200 (before taxes)
Mistake 5: Not planning for contingencies Business drops 20% in revenue? Can you still make payments?
What If You Can't Afford the Payments?
You've run the numbers and the payments are too high. Options:
Option 1: Negotiate lower purchase price
Every $100K reduction = ~$1,390/month savings
Option 2: Larger down payment
More down = smaller loan = lower payment
Option 3: Seller financing
Seller carries part of purchase (with no payments for 2+ years)
Option 4: Look at smaller businesses
Can't afford $2M business? Look at $1M businesses.
Option 5: Partner with someone
Split ownership and payments
Option 6: Wait and save more
Not what you want to hear, but sometimes the smart move.
Advanced: Building a Complete Financial Model
Beyond basic payment calculation, smart buyers model:
Cash flow projections:
- Year 1-5 revenue projections
- Expected expenses
- Loan payments
- Owner compensation
- Cash reserves
Sensitivity analysis:
- What if revenue drops 10%?
- What if expenses increase 5%?
- What if you lose top customer?
Break-even analysis:
- Minimum revenue to cover all costs
- How much buffer do you have?
Our calculator gives you the foundation. Build on it with your own projections.
Other Calculators You Need
Beyond SBA loan payment calculator, use:
DSCR Calculator See if business cash flow supports loan
Business Valuation Calculator Estimate what business is worth
Down Payment Calculator Figure out total cash needed
ROI Calculator Calculate your return on investment
SBA Eligibility Quiz See if you qualify for SBA financing
Working with Real Lenders
Calculator gives estimates. Real lenders give actual terms.
What affects your actual rate:
- Your credit score
- Business risk profile
- Down payment amount
- Lender choice
Typical range:
- Best rates: 10.5-10.75%
- Average rates: 11-11.5%
- Higher risk: 11.5-12%+
How we help: We shop your loan to 75+ lenders and get you multiple quotes. Then you pick the best one.
Process:
- Use calculator to estimate what you need
- Apply with us
- We shop to multiple lenders
- You get real quotes within 1-2 weeks
- Compare and choose
Frequently Asked Questions
Q: Are SBA loan calculators accurate? A: Very close. Actual payment might vary by $50-100/month due to exact rate and fees.
Q: What interest rate should I use? A: Current market rate is 11-11.5% for most borrowers in 2026.
Q: Can I pay off SBA loan early? A: Yes, with no prepayment penalty after 3 years. Some banks allow it earlier.
Q: Do SBA loans have balloon payments? A: No. Fully amortized over the term. Same payment entire time.
Q: What if my business doesn't make enough? A: You won't qualify. Either negotiate lower price, put more down, or look at smaller businesses.
Q: Can I refinance my SBA loan later? A: Yes. If rates drop or business improves, you can refinance to better terms.
Take the Next Step
Now that you understand SBA loan calculations:
1. Run the numbers Use our calculator to see what you can afford
2. Check if you qualify Take the eligibility quiz (2 minutes)
3. Get real quotes Apply here and we'll shop your loan to 75+ lenders (free service)
4. Talk to an expert Have questions? Apply and we'll call you within 24 hours
Final Thoughts
An SBA loan calculator is your first step in buying a business.
It helps you:
- Estimate monthly payments
- See if you can afford a business
- Calculate required down payment
- Understand total cost
But don't stop at the calculator. Every deal is unique. Talk to lenders (or work with us) to get actual quotes based on your specific situation.
The calculator gives you the foundation. Real quotes tell you what you'll actually pay.
Calculate your SBA loan payment now or apply for real quotes.