What is a Business Loan Calculator?
A business loan calculator helps entrepreneurs and business owners estimate their monthly repayment obligations before committing to a loan. By inputting the loan principal, interest rate, and term length, you instantly see the monthly payment, total repayment amount, and full interest cost — giving you the data to compare lenders and negotiate better terms.
How is the Monthly Payment Calculated?
The calculation uses the standard amortization formula: M = P[r(1+r)ⁿ] / [(1+r)ⁿ–1], where P is the principal, r is the monthly interest rate (annual rate ÷ 12), and n is the number of monthly payments. Each payment covers accrued interest first, with the remainder reducing the principal balance.
What is a Good Interest Rate for a Business Loan?
In 2026, competitive business loan rates typically range from 6.5% to 12% for qualified borrowers with strong credit and established revenue. SBA-backed loans tend to offer lower rates. The Federal Reserve benchmark rate (shown live above) is the starting point from which banks determine their prime rate and lending spreads.
Fixed vs. Variable Rate Business Loans
Fixed-rate loans lock in your interest rate for the full term — ideal when rates are low or rising. Variable-rate loans fluctuate with the prime rate, which tracks the Federal Reserve's benchmark. If the Fed cuts rates, your variable-rate payment decreases; if rates rise, so does your cost. This calculator models fixed-rate loans.
When to Use This Calculator
- You're comparing loan offers from multiple banks and need to see which has the lowest true monthly cost.
- You're planning a business expansion and want to model how different loan amounts and terms affect your cash flow.
- You're applying for an SBA loan and need to estimate payments across different term lengths (7, 10, or 15 years).
- You want to stress-test whether a higher interest rate would still keep your payments within a comfortable range.
- You're preparing a business plan and need realistic debt-service numbers for your financial projections.
Worked Example: $50,000 at 7.5% Over 60 Months
Let's walk through a realistic scenario. You need $50,000 to buy new equipment for your manufacturing business. A bank offers you a 5-year (60-month) loan at 7.5% annual interest. Here's how the first three months look:
| # | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $1,005.12 | $702.62 | $302.50 | $49,297.38 |
| 2 | $1,005.12 | $706.86 | $298.26 | $48,590.52 |
| 3 | $1,005.12 | $711.12 | $293.99 | $47,879.40 |
Over the full 60 months, you'll pay $60,307.20 total — that's $10,307.20 in interest, or about 20.6% of the original loan. Shortening the term to 36 months would increase the monthly payment to $1,548.22 but cut total interest to $5,735.92 — saving you $4,571.28.
FAQ: How is monthly payment calculated?
The calculator uses the standard amortization formula: M = P[r(1+r)^n] / [(1+r)^n-1]. It spreads principal and interest across the full term and updates balance month by month.
FAQ: What is a good business loan rate in 2026?
For qualified borrowers, many offers fall between 6.5% and 12%, depending on credit, collateral, and lender type. SBA-backed financing can be lower than unsecured alternatives.
FAQ: Fixed vs. variable rate?
This tool models fixed-rate loans. For variable loans, run multiple scenarios with different rates to stress-test payment risk if the Fed benchmark changes.
FAQ: Can I use this for personal loans?
While designed for business loans, the amortization formula is the same for personal loans. The difference lies in typical rates and terms — personal loans usually carry higher rates and shorter terms than business loans.
FAQ: Does this account for taxes and fees?
This calculator shows the gross payment based on principal, interest rate, and term. It does not include origination fees, insurance, or tax deductions. Consult your accountant for the net after-tax cost of borrowing.
Next Step: Are You Funding-Ready?
Before you take on debt, pressure-test whether your business is actually ready for external capital and investor scrutiny.
Recommended Lender Platforms
If you want to compare offers quickly, lender marketplaces can surface rates and term options faster than approaching one bank at a time.
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