Loan Details
SBA loans typically range 5-10%
10.0 years
One-time fee charged at loan origination
Loan Summary
Yearly Summary
| Year | Principal Paid | Interest Paid | Remaining Balance |
|---|---|---|---|
| Year 1 | $20,910.00 | $35,762.70 | $329,090.00 |
| Year 2 | $23,214.36 | $33,458.34 | $305,875.64 |
| Year 3 | $25,772.66 | $30,900.04 | $280,102.99 |
| Year 4 | $28,612.89 | $28,059.81 | $251,490.09 |
| Year 5 | $31,766.13 | $24,906.57 | $219,723.96 |
| Year 6 | $35,266.87 | $21,405.83 | $184,457.09 |
| Year 7 | $39,153.40 | $17,519.30 | $145,303.69 |
| Year 8 | $43,468.24 | $13,204.46 | $101,835.45 |
| Year 9 | $48,258.59 | $8,414.11 | $53,576.85 |
| Year 10 | $53,576.85 | $3,095.84 | $0.00 |
How to Calculate an SBA Loan Payment
- 1
Enter the loan amount
SBA 7(a) loans go up to $5 million; SBA 504 also caps at $5M for the CDC portion; SBA Express tops out at $500,000. Enter the amount you plan to borrow. - 2
Set the interest rate
SBA 7(a) rates are variable and capped at Prime + 3.0%–4.5% depending on loan size and term. In April 2026, typical SBA 7(a) rates fall between 10.5% and 13.5%. Enter your quoted rate, or use the default for a rough estimate. - 3
Choose the term
SBA 7(a) terms are up to 10 years for working capital and equipment, up to 25 years for real estate. SBA 504 terms are 10, 20, or 25 years. Enter the term in months. - 4
Add the SBA guarantee fee
The SBA charges a one-time guarantee fee based on the guaranteed portion of the loan. Use the origination fee field to model this — see the fee table below for current tiers. - 5
Review the payment and amortization
The calculator shows your monthly payment, total interest, total cost including fees, and the effective APR. Expand the amortization schedule to see how each monthly payment splits between principal and interest.
When to Use the SBA Loan Calculator
Before applying for an SBA 7(a) loan
Comparing SBA 7(a) vs conventional business loans
SBA 504 real estate financing
SBA Express and Export Express
About This Tool
The SBA Loan Calculator estimates monthly payments, total interest, and the effective APR for loans guaranteed by the U.S. Small Business Administration — including the 7(a), 504, and Express programs. Enter your loan amount, interest rate, term in months, and the SBA guarantee fee as a percentage, and the tool produces a full amortization schedule showing how every payment splits between principal and interest.
SBA 7(a) is the most common program and caps at $5 million. Interest rates are variable and tied to the Prime rate, with the SBA capping the maximum margin at 3.0%–4.5% above Prime depending on loan size and term. As of April 2026, Prime sits around 8.0%, putting typical SBA 7(a) rates in the 10.5%–13.5% range. Terms run up to 10 years for working capital and equipment, and up to 25 years for commercial real estate. The SBA guarantee fee ranges from 0% on loans at or below $1 million (currently waived through fiscal year 2026) to 3.75% on the guaranteed portion of larger loans.
SBA 504 loans fund commercial real estate and heavy equipment with a 50/40/10 structure: 50% from a bank, 40% from a Certified Development Company (CDC) at a fixed rate, and 10% equity from the borrower. Terms are 10, 20, or 25 years. SBA Express loans cap at $500,000 with faster approval but higher rates — up to Prime plus 6.5% — and reduced paperwork.
Use this calculator alongside the business loan calculator to compare an SBA offer against a conventional term loan, the amortization calculator to model early-payoff scenarios, and the break-even calculator to confirm the monthly payment fits your projected revenue. For real estate deals specifically, pair it with the mortgage calculator.
How It Compares
Lender-branded calculators (SmartBiz, Lendio, Fundera) often require an email address and funnel you into a quote request. The SBA's own payment tool on sba.gov does not show full amortization and does not include the guarantee fee in the total cost. This calculator runs entirely in your browser, never stores or transmits the numbers you enter, and computes the full amortization plus effective APR including fees — all in one place and with no signup.
The core math is the standard amortization formula: monthly payment = P × r × (1+r)^n / ((1+r)^n − 1), where P is principal, r is monthly rate, and n is total months. The effective APR adds the guarantee fee to the total interest and divides by the principal and term — a useful number for apples-to-apples comparison with a non-SBA loan offer that has no fees.