How to Use This Calculator
- 1
Enter the Loan Amount
Input the total principal amount your small business intends to borrow, for example, $100,000 for equipment financing.
- 2
Specify the Annual Interest Rate
Provide the yearly interest rate charged by the lender, such as 5% for a commercial loan.
- 3
Define the Loan Term in Years
Indicate the total duration over which you plan to repay the loan, for instance, 10 years.
- 4
Select Payments per Year
Choose the frequency of your loan payments — 12 for monthly, 4 for quarterly, or 26 for bi-weekly.
- 5
Review Your Results
Examine your Periodic Payment, Total Repaid, Total Interest Paid, Interest-to-Principal Ratio, and Effective Annual Rate. The Insights panel shows annual cash outflow, break-even point, and a principal vs interest breakdown. Scroll down for the full amortization schedule.
Example Calculation
A small business secures a $100,000 loan to expand its operations at 5% interest over 10 years with monthly payments.
Loan Amount
$100,000
Annual Interest Rate
5%
Loan Term
10 years
Payments per Year
12
Results
Periodic Payment
$1,060.66
Total Repaid
$127,278.62
Total Interest Paid
$27,278.62
Interest-to-Principal Ratio
27.3%
Effective Annual Rate
5.116%
Tips
Study the Amortization Schedule
Early payments are interest-heavy. In the first year of a $100,000 loan at 5%, roughly $4,894 goes to interest and $7,834 to principal. Understanding this shift helps you decide when extra payments have the most impact.
Shop for Better Rates
A 1% rate difference on a $100,000 loan over 10 years changes total interest by several thousand dollars. Compare SBA loans, credit unions, and online lenders before committing.
Budget for Annual Cash Outflow
The Effective Annual Rate of 5.116% accounts for monthly compounding and exceeds the 5% nominal rate. Factor the $12,728 annual payment burden into your operating budget.
Consider Extra Payments
If your business generates surplus cash, making extra principal payments in the early years can significantly reduce total interest. Even $100/month extra can save thousands over a 10-year term.
Understanding Small Business Loan Repayment with Amortization
The Small Business Loan Calculator with Amortization provides a complete breakdown of monthly payments, total interest, and a detailed amortization schedule showing how each payment splits between principal and interest over the loan's lifetime.
For a $100,000 business loan at 5% interest over 10 years with monthly payments, the periodic payment is $1,060.66. The total repaid is $127,278.62, with $27,278.62 going to interest.
Interpreting Your Loan Amortization
Financial advisors look beyond the monthly payment to assess total interest burden. The interest-to-principal ratio of 27.3% for the example above means you pay $27.30 in interest for every $100 borrowed — a moderate cost for a 10-year term.
The effective annual rate of 5.116% exceeds the 5% nominal rate because monthly compounding increases the true cost. This metric is crucial when comparing loans with different compounding frequencies.
The Amortization Formula
The periodic interest rate and total payments are determined first:
Periodic Interest Rate = Annual Interest Rate / (100 x Payments per Year)
Total Payments = Loan Term (years) x Payments per Year
Then the Periodic Payment is calculated:
Periodic Payment = (Loan Amount x Periodic Interest Rate) / (1 - (1 + Periodic Interest Rate)^-Total Payments)
Additional outputs:
Total Repaid = Periodic Payment x Total Payments
Total Interest = Total Repaid - Loan Amount
Interest-to-Principal Ratio = (Total Interest / Loan Amount) x 100
Effective Annual Rate = (1 + Periodic Rate)^Payments per Year - 1
Worked Example: Financing a Business Expansion
A small business borrows $100,000 at 5% annual interest for 10 years with monthly payments.
- Periodic Interest Rate: 0.05 / 12 = 0.0041667
- Total Payments: 10 x 12 = 120
- Periodic Payment: ($100,000 x 0.0041667) / (1 - (1.0041667)^-120) = $416.67 / (1 - 0.60716) = $416.67 / 0.39284 = $1,060.66
- Total Repaid: $1,060.66 x 120 = $127,278.62
- Total Interest Paid: $127,278.62 - $100,000 = $27,278.62
- Interest-to-Principal Ratio: ($27,278.62 / $100,000) x 100 = 27.3%
- Effective Annual Rate: (1 + 0.0041667)^12 - 1 = 5.116%
The business makes 120 monthly payments of $1,060.66.
After roughly 5 years, more of each payment goes toward principal than interest, accelerating the payoff.
Strategic Loan Repayment
Understanding the amortization schedule enables strategic decisions about extra payments. In the early years, extra principal payments have the greatest impact on reducing total interest because the balance is highest. Many lenders offer flexible repayment options — verify there are no prepayment penalties before making extra payments.
For businesses with seasonal income, aligning payment schedules with revenue cycles can reduce cash flow strain. The goal is to minimize borrowing costs while maintaining sufficient liquidity for operations and future investments in 2026.
Frequently Asked Questions
What does an amortization schedule show me?
An amortization schedule breaks down each payment into principal and interest portions for every period of your loan. Early payments are mostly interest, while later payments are mostly principal. This helps you understand exactly how much of each payment reduces your actual debt versus covering interest charges.
How is a small business loan with amortization different from interest-only?
An amortizing loan requires both principal and interest in each payment, gradually paying down the balance to zero by the end of the term. An interest-only loan requires only interest payments for a set period, after which you must either pay the principal in a lump sum or begin amortized payments. Amortizing loans cost less in total interest.
Why do I pay more interest at the beginning of the loan?
Interest is calculated on the outstanding principal balance. At the start, the balance is at its highest, so a larger portion of each payment goes to interest. As you pay down the principal over time, the interest portion decreases and more of each payment goes toward reducing the balance.
How does changing the payment frequency affect amortization?
Increasing payment frequency from monthly to biweekly or weekly means you make more payments per year. This reduces the outstanding balance faster, lowering the total interest paid over the life of the loan. Biweekly payments on a 10-year loan can save several months of payments.