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You found an SBA loan that could work for your business. Now you want to know how much it will cost each month. Our SBA loan calculator helps you answer that question by giving you a quick estimate before you fill out a single form.
Just enter the amount you want to borrow, an interest rate, and how many years you will take to pay it back. The calculator then shows your estimated monthly payment. Below, I explain what real numbers to enter for each one.
| Program | Typical interest rate (current) | Maximum loan amount | Repayment terms |
|---|---|---|---|
| SBA 7(a) | Usually variable: the prime rate (6.75% as of June 10, 2026) plus a lender spread capped by loan size, so max rates run about 9.75% to 13.25% today; fixed-rate options also exist | $5 million | Up to 10 years for working capital and equipment; up to 25 years for real estate |
| SBA 504 | Fixed, set as a spread above the 10-year Treasury (about 4.55% as of June 10, 2026) at the time the debenture is sold | $5.5 million (CDC/debenture portion) | 10, 20, or 25 years |
| SBA Microloan | Generally 8% to 13% | Up to $50,000 (average about $13,000) | Up to 7 years |
Use the SBA Loan Calculator
Enter the amount of money you want to borrow, an interest rate, and a term in years. This calculator will give you an estimated monthly payment.
This calculation gives you an estimate of the total amount paid each month for principal and interest only. Principal represents the amount borrowed. Lenders charge interest for borrowing the money.
The SBA also charges a one-time guaranty fee that is typically included in the loan amount. So it is not part of the monthly payment estimate this calculator provides.
Our calculator gives you an estimate, not a final offer. Your real payment depends on the rate a lender gives you, the term you choose, and a one-time SBA fee. Your Clarify lending advisor can create actual payment scenarios during your consultation to show how the loans could work for you based on your financial situation.
How SBA Loan Payments Are Determined
The mathematical process called amortization is used to calculate each fixed monthly payment. Your monthly payment stays constant for the life of the loan, with equal payments made until the loan is repaid. In the early stages of the loan, larger portions of each payment go toward paying interest. In later stages, larger portions go toward reducing the outstanding loan balance.
Here's an equation that lenders use to calculate SBA loan payments:
M =
P ×
r(1 + r)n
(1 + r)n − 1There's no need to do this by hand, but it helps to understand what each variable represents. P is the amount borrowed. R is your monthly interest rate, which is your yearly interest rate divided by 12. N is the number of monthly payments, which equals your years multiplied by 12.
There are two primary factors that affect your loan payment. An increase in the interest rate increases your payment. Extending your repayment period decreases your monthly payment but increases the overall interest you repay during the loan period.
Here's an example of how changing your loan terms affects your monthly and total interest payments. The following examples assume an interest rate that falls within today's range for 7(a) loans.
| Loan amount | Interest rate | Term | Est. monthly payment | Est. total interest |
|---|---|---|---|---|
| $250,000 | 11.5% | 10 years | About $3,515 | About $172,000 |
| $250,000 | 11.5% | 25 years | About $2,540 | About $512,000 |
| $500,000 | 9.5% | 25 years | About $4,370 | About $810,000 |
As shown in the first two entries, increasing the repayment period from 10 years to 25 years reduces your monthly payment by nearly 30%. But it significantly increases the total interest paid on your loan. Selecting an appropriate repayment term is as important as selecting an acceptable interest rate.
After determining a potential loan's costs, the next phase involves assessing the SBA loan requirements.
Selecting an Appropriate Interest Rate
Many clients have a hard time picking an interest rate to enter into their calculator, so this section will provide some guidance.
Most 7(a) Loans Have Adjustable Rates
Variable interest rates represent most 7(a) loans' interest rate structure.
Variable rates are open to change based on market conditions and time. Lenders set the rate on an adjustable-rate loan by adding their own margin to a benchmark rate called the prime rate. The current prime rate is 6.75%. The SBA establishes ceilings on how large a lender's margin can be on a particular loan, depending on the dollar amount being borrowed.
Here are today's ceiling rates for 7(a) variable-interest loans:
| Loan amount | Rate ceiling |
|---|---|
| $50,000 or less | Base rate plus 6.5% |
| $50,001 to $250,000 | Base rate plus 6.0% |
| $250,001 to $350,000 | Base rate plus 4.5% |
| Greater than $350,000 | Base rate plus 3.0% |
Many borrowers receive quoted interest rates well under these ceilings. So, entering a higher interest rate into your calculator will result in a conservative, somewhat high estimate.
A Few 7(a) Loans Offer Fixed-Rate Options
In addition to variable-rate options, some lenders offer fixed-rate options on certain loans.
Fixed rates remain unchanged for the entire term of a loan. If you want consistent monthly payments no matter how the market moves, consider asking a lender about a fixed-rate option.
All SBA 504 Loans Have Fixed Rates
Rates are fixed for SBA 504 loans, so the borrower's monthly payments stay stable. The rate is set by adding a margin over a U.S. government obligation that matures in 10 years (about 4.55% as of June 10, 2026). Because the rate on a 504 loan is fixed, a 504 estimate stays relatively stable, while an estimate from a variable-rate 7(a) option would likely change if market conditions changed.
Why Does This Matter?
When you compare quotes for variable-rate loans, keep in mind that any quote is valid only at that moment, because it reflects the prime rate at that time. If the prime rate changes later, your loan payments will change too. Consider running a slightly higher interest rate through your calculator to see how stable your payment would be.
The SBA Guaranty Fee
Most calculators provide estimates representing only principal and interest payments. This can make your estimated monthly payment look reasonable next to other financing options. But it leaves out another significant expense tied directly to an SBA loan, the one-time SBA guaranty fee.
The one-time SBA guaranty fee applies only when a borrower receives an SBA-backed loan that lasts longer than one year. Most borrowers do not pay the fee directly. Lenders add it to their loan instead.
Here is a summary of today's maximum SBA guaranty fees for SBA-backed loans:
| Loan type or amount | Guaranty fee |
|---|---|
| $150,000 or less | 2% of the guaranteed amount |
| $150,001 to $700,000 | 3% of the guaranteed amount |
| Over $700,000 | 3.5% of the guaranteed portion up to $1 million, plus 3.75% of any guaranteed amount above $1 million |
| Short-term loans of one year or less | 0.25% |
| Manufacturer loans of $950,000 or less | No up-front guaranty fee |
Lenders also pay an annual servicing fee (0.55% of the guaranteed portion for 2026). That fee is not passed on to borrowers, so do not add it back into your estimated monthly payment.
Your Down Payment and Equity Investment
When using an SBA loan estimator to figure out monthly payments, many users overlook the cash they need up front for their business, known as a down payment or equity contribution.
For a 7(a) loan, the SBA doesn't set one fixed down payment. Lenders set their own minimum based on your situation, including the purpose of the financing (for example, buying equipment versus expanding commercial space).
The SBA 504 program sets minimum percentages. So when estimating monthly payments, enter only what you plan to borrow after your down payment, not the total project cost.
For an SBA 504 loan, you generally contribute at least 10% of the project cost as equity. That rises to 15% if your business is new (open two years or less) or the property has a special use. It rises to 20% when both are true.
Why does this matter? A larger down payment means you borrow less, which results in lower estimated monthly payments. So use an SBA loan estimator that calculates with the actual amount borrowed, not the total project cost.
Are Faster Non-SBA Financing Options More Suitable?
An SBA loan typically offers low-cost financing. But these loans often require long application processing times and a lot of documentation. Approval can take several weeks, and some applications take 30 days or longer. Below are examples of when other financing options are a better fit:
| Your situation | What may fit |
|---|---|
| Do you need cash quickly? | If you can't afford to wait several weeks (or months), faster financing options may meet your needs more quickly, even if their pricing is higher. |
| Will your needs be short-term? | Other options may fit better if your capital needs come and go, like short-term or recurring expenses (for example, seasonal gaps or ongoing costs such as utilities). A business line of credit or a short-term loan can work better for these cyclical shortfalls than a long-term SBA loan. |
| Are you acquiring one specific item? | Equipment financing covers purchases of specific business assets, like machinery or trucks. Invoice factoring turns unpaid customer invoices into immediate cash. |
The good news is these options use similar formulas to calculate monthly payments. So you can compare them side by side instead of assuming the SBA is always the cheapest once you factor in the wait.
Estimate Your Loan Costs, Then Apply
Figuring out which SBA program fits your business is harder than running estimates in a calculator.
Clarify Capital helps small to midsize business owners find solid financing options. We connect you with more than 75 vetted lenders who compete for your business, so you can compare real financing offers based on hard numbers instead of guesswork. When you're ready to see real numbers, apply today.
Frequently Asked Questions
Here are some common questions that I hear from clients about calculating their monthly payments on an SBA loan.
How Do You Determine How Much I'll Pay Each Month on an SBA Loan?
You determine your monthly payment with the standard amortization formula, which spreads principal and interest into equal payments across the term. Enter your loan amount, interest rate, and term in the calculator above for an estimate (principal and interest only, not the guaranty fee).
What Interest Rate Should You Assume When Calculating How Much You Will Pay on an SBA Loan?
For a 7(a) loan, assume a variable interest rate near today's maximums, roughly 9.75% to 13.25% depending on loan size at the current 6.75% prime rate. That's conservative since many lenders quote lower, while SBA 504 loans are fixed-rate and Microloans typically run 8% to 13%.
How Much Would I Have To Pay per Month on a $500,000 SBA Loan?
At about 9.5% over 25 years, a $500,000 SBA loan runs about $4,370 per month, though it varies with your rate and repayment term. A shorter term raises the monthly payment but cuts total interest, so use the calculator above to compare.
How Long Can I Take To Repay an SBA Loan?
It depends on the use: A 7(a) loan runs up to 25 years for real estate and up to 10 years for equipment or other business assets. A 504 loan runs 10, 20, or 25 years, and Microloans up to seven years (SBA, 2026).
Do Most SBA Loan Calculators Account for All of the Fees Involved in Borrowing Money Through an SBA Program?
No. Most calculators, including this one, show only principal and interest and skip the one-time SBA guaranty fee (2% to 3.75% of the guaranteed portion for 2026); lenders usually roll it into your loan, so add it to your loan amount for a fuller estimate (SBA, 2026).
Are the Interest Rates Charged Under an SBA Loan Adjustable or Fixed?
Most 7(a) loans carry an adjustable interest rate, the prime rate plus an SBA-capped margin, though some fixed-rate options exist; SBA 504 loans are fixed. Because an adjustable rate can move with prime, any payment estimate is a snapshot that could change (SBA, 2026).
Will You Protect My Personal and Financial Data if I Decide To Get a Quote for My Business?
Yes. Clarify follows SOC 2 security principles to protect your information, and checking your options won't affect your credit score.
Bryan Gerson
Co-founder, Clarify
Bryan has personally arranged over $900 million in funding for businesses across trucking, restaurants, retail, construction, and healthcare. Since graduating from the University of Arizona in 2011, Bryan has spent his entire career in alternative finance, helping business owners secure capital when traditional banks turn them away. He specializes in bad credit funding, no doc lending, invoice factoring, and working capital solutions. More about the Clarify team →
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