| Scenario | Loan | Rate | Term | Frequency | Extras | What to watch |
|---|---|---|---|---|---|---|
| Working capital | $75,000 | 12.0% | 3 years | Monthly | $0 | Payment size and total interest |
| Equipment finance | $250,000 | 10.5% | 5 years | Monthly | $5,000 at period 12 | Payoff date shift after lump sum |
| Seasonal business | $120,000 | 11.0% | 4 years | Quarterly | $200 each period | Cash flow timing and balance drops |
The calculator first converts the annual rate into an effective periodic rate based on your compounding and payment frequency: r = (1 + APR/c)^(c/p) − 1, where c is compounding periods per year and p is payments per year.
The scheduled payment is then computed using the standard amortization payment formula: PMT = P·r·(1+r)^n / ((1+r)^n − 1). If r = 0, then PMT = P/n.
Each period splits the payment into interest and principal: Interest = Balance·r and Principal = Payment − Interest. Extra payments increase principal reduction and can shorten the term.
- Enter the loan amount, rate, and term that match your offer.
- Select a payment frequency and compounding style from your agreement.
- Add origination fees and closing costs to estimate net proceeds.
- Use extra payments to model faster payoff or interest savings.
- Click Calculate to view totals and the full schedule.
- Download CSV for spreadsheets, or create a PDF for sharing.
Cash Flow Planning for Fixed Installments
Amortized business loans convert a large principal into predictable installments. Use the schedule to map monthly, weekly, or quarterly outflows against revenue cycles. A five-year term spreads payments, while a shorter term raises installments but reduces total interest. Align frequency with your invoicing rhythm to avoid liquidity pressure.
Interest, Principal Mix, and Margin Impact
Early payments are interest-heavy because the balance is highest. Over time, interest shrinks and principal grows. Track the interest line item to estimate financing cost as a percentage of gross margin. When rates change, even a one-point difference can materially alter total interest over dozens of periods.
Fees, Net Proceeds, and True Cost of Capital
Origination fees and closing costs reduce the cash you actually receive. Compare net proceeds against the total paid figure to understand the full cost of borrowing. If the fee is funded into the loan, the schedule reflects a higher financed amount; if paid upfront, your effective cost rises even if the nominal rate stays the same.
Extra Payments and Payoff Acceleration
Small recurring extras can shorten the payoff date and lower interest. A one-time lump sum is useful after seasonal peaks, contract milestones, or asset sales. Use the chart to visualize how faster balance reduction reduces interest exposure. For planning, compare scenarios: no extras, modest recurring extras, and a targeted lump sum.
Market Benchmarks and Sensitivity
Compare your quoted rate to peer benchmarks, then test sensitivity by adjusting rate, term, and frequency. Evaluate the payment-to-revenue ratio and the interest-to-profit ratio to keep debt service sustainable. If refinancing is possible, the schedule helps quantify break-even timing by comparing interest saved versus refinance fees.
1) What is an amortization schedule?
It is a period-by-period table showing each payment’s interest, principal, extra amount, and remaining balance until the loan is paid off.
2) Why does interest start higher and decline later?
Interest is calculated on the current balance. Early in the loan the balance is larger, so interest is larger. As the balance drops, interest decreases and more of each payment goes to principal.
3) How do fees affect what I actually receive?
Fees reduce net proceeds. You may borrow $250,000 but receive less after origination fees and closing costs. The calculator estimates both total fees and net proceeds.
4) What does compounding change in the math?
Compounding helps convert the annual rate into an effective periodic rate. Daily compounding can produce a slightly different periodic rate than monthly compounding, affecting the payment and totals.
5) Do extra payments always save money?
Usually yes, because extras reduce principal earlier, lowering future interest. Confirm your lender allows prepayments without penalties and check whether extras apply directly to principal.
6) Can I download and share results with my accountant?
Yes. After calculating, download the CSV for spreadsheets or use the PDF export for quick sharing. Printed output also works for documentation packs.