SBA Loan Calculator

How to use this calculator

This is a straightforward amortization calculator — enter your loan amount, interest rate, and term, and it shows you exactly what your payment structure looks like. But the numbers only tell the truth if the inputs are realistic. Here's how to choose them.

Loan amount

Enter the amount you actually want to borrow. If you're planning to finance the SBA guarantee fee into the loan (most borrowers do), leave the toggle on and enter the amount you need to receive — the calculator will add the fee on top automatically.

Interest rate

The right rate to enter depends on which SBA program you're modeling:

• SBA 7(a) — typical rates run Prime plus 2.25% to 4.75%. With Prime around 7.75%, that puts real-world rates roughly 10% to 12%. Larger, stronger deals land at the low end; smaller and weaker profiles closer to the top.
• SBA 504 — the SBA portion is tied to 10-year Treasury rates and has historically landed in the 5% to 7% range. Use this for the 40% SBA piece; model the bank's 50% piece separately at market rates (typically 7% to 9% currently).
• SBA Express — lenders can charge up to Prime + 6.5%, so expect 12% to 14% on smaller Express loans.

For a realistic estimate on your specific profile, start a pre-qualification — our funding specialists can quote actual indicative rates from our lender network.

Term

SBA 7(a) maximum terms are 10 years for working capital and equipment, 25 years for real estate, and 10 years for business acquisitions. SBA 504 loans use 10, 20, or 25 years. Longer terms lower your monthly payment but substantially increase total interest — the calculator makes this tradeoff explicit.

What the numbers actually mean

Monthly payment

This is your fully-amortized principal and interest payment. It assumes a fixed rate for the entire term. Most SBA 7(a) loans are variable-rate, adjusting quarterly with Prime — so your real payment may shift by $50 to $200 a month as rates move. The calculator shows your starting payment under current rate assumptions.

Total interest paid

This is the difference between what you'll pay over the life of the loan and what you borrowed. It's almost always larger than people expect. A $500,000 loan at 11% over 10 years costs $327,000 in interest — more than half the loan amount again. This is why rate and term matter enormously.

Year-by-year breakdown

Watch closely: in year one, most of your payment goes to interest. In the final year, most goes to principal. This is because interest accrues on the remaining balance, which shrinks over time. One practical implication — paying extra principal early in the loan has outsized impact on total interest saved. An extra $500/month in year one can save tens of thousands over the life of the loan.

Typical SBA loan scenarios

Click any scenario to load it into the calculator above. These reflect common profiles we see at BizLendHub — real amounts, real terms, rates in the middle of the current market range.

What this calculator does not account for

Good tools are honest about their limits. Here's what this one doesn't show:

• Closing costs. Appraisals, title insurance, legal fees, environmental reports, and packaging fees can add 2–5% on top of your loan amount, especially on real estate deals. These are usually paid at closing, not rolled into the loan.
• Variable rate adjustments. Most SBA 7(a) loans adjust quarterly with Prime. The calculator shows a fixed scenario — a useful starting point, but your real payment will move.
• Prepayment penalties. SBA 7(a) loans with terms of 15 years or more carry a declining prepayment penalty for the first three years. For shorter-term loans, there's no penalty.
• Impounds or reserves. Some lenders require a few months of reserves in escrow. This doesn't affect your payment but does affect your cash at closing.

For a full quote that accounts for every cost, submit a pre-qualification — we'll return itemized term sheets from the lenders most likely to fund your deal.

Frequently asked questions