The Business Loan Calculator helps entrepreneurs and established companies estimate monthly loan payments, total interest costs, and visualize a complete amortization schedule. Whether you are financing equipment, real estate, or working capital, this tool lets you compare scenarios and plan repayments with precision -- essential for sound financial planning in 2026.
How Business Loan Payments Are Calculated
The calculator uses the standard amortization formula to determine your fixed monthly payment:
M = P * i / (1 - (1 + i)^-n)
Where P is the principal loan amount, i is the monthly interest rate (annual APR divided by 12), and n is the total number of payments. For a $100,000 loan at 7.5% APR over 5 years: i = 0.075 / 12 = 0.00625, n = 60, giving M = $2,003.79 per month.
| Metric | Value |
|---|---|
| Monthly Payment | $2,003.79 |
| Total Payments (60 months) | $120,227.69 |
| Total Interest | $20,227.69 |
| Interest-to-Principal Ratio | 20.2% |
Comparing Loan Scenarios
Small differences in rate or term have outsized effects on total cost. The table below shows how a $100,000 loan performs under different conditions:
| Scenario | APR | Term | Monthly Payment | Total Interest |
|---|---|---|---|---|
| Base case | 7.5% | 5 years | $2,003.79 | $20,227.69 |
| Lower rate | 7.0% | 5 years | $1,980.12 | $18,807.19 |
| Shorter term | 7.5% | 4 years | $2,417.89 | $16,058.73 |
Dropping the rate by 0.5% saves $1,421 in interest. Shortening the term by one year saves $4,169 but increases the monthly payment by $414. Use the calculator to find the combination that fits your business cash flow.
Understanding Amortization in 2026
Amortization ensures predictable payments, but the interest-to-principal split shifts dramatically over the loan's life. On a $100,000 loan at 8% over 10 years, roughly 53% of first-year payments go toward interest. By the final year, nearly all of each payment reduces principal.
In 2026, small business term loans commonly feature repayment periods of 5 to 10 years, with APRs between 6% and 13% for well-qualified borrowers. SBA 7(a) loans offer competitive rates with terms up to 25 years for real estate. Understanding amortization helps you anticipate when your equity in financed assets accelerates -- typically in the second half of the loan term.