This Starbrook Lending calculator, from Mason City, Iowa, estimates payments on a drawn credit line balance from the numbers you enter. The result is arithmetic only, not an offer; real rates and terms come from funding partners.
How Are Payments Calculated on a Line of Credit? What It Means for Mason City, IA Retailers
Line of credit payments are figured one of two ways. An interest-only payment is the drawn balance times the annual rate divided by twelve, or the balance times the rate divided by 365 for each day. An amortizing payment adds principal so the balance reaches zero over a set number of months.
Illustration only, invented figures: a retailer with $40,000 drawn at an invented annual rate of 10.5% pays about $350.00 a month interest-only, or about $1,855 a month to pay the balance off in 24 months (our arithmetic).
Inputs the Line of Credit Payment Calculator Interest Only Uses for Insurance Agencies
- Balance: the amount drawn, not the limit; an agency drawing $15,000 against a $50,000 line enters $15,000.
- Annual rate: from the offer, written as a percent.
- Months: how long the agency plans to take to pay the balance down.
Inputs the Line of Credit Payment Calculator Interest Only Uses for Station and C-Store Owners
- Balance: the fuel load or store order drawn on the line.
- Annual rate: the rate on the offer, including any index plus margin.
- Months: the number of months until the draw is paid down from sales.
A station drawing for a fuel load often pays it down in days or weeks, so the interest-only arithmetic below is the closer guide.
Limits of the Line of Credit Payment Calculator Interest Only
- It assumes a fixed rate; many lines are variable.
- It does not include annual fees, draw fees or unused-line fees.
- It does not model interest-only periods, daily interest or new draws during the term.
- It is not an offer.
Business lines of credit explains renewals and covenants.
An Invented $40,000 Draw on a Mason City, IA Kitchen Line, Month by Month
Illustration only, invented figures: a kitchen line at an invented annual rate of 10.5%. Month one carries an invented $40,000; month two, after a paydown, an invented $28,000; month three an invented $15,000.
| Month | Balance | Interest for the month |
|---|---|---|
| 1 | $40,000 | $350.00 |
| 2 | $28,000 | $245.00 |
| 3 | $15,000 | $131.25 |
Invented figures continued: the three months cost about $726.25 in interest together (our sum).
Balance Times Rate Over 365: Daily Interest on a Line Worked by Hand
Illustration only, invented figures: $40,000 at 10.5% costs about $11.51 a day (balance times rate divided by 365), or about $356.71 over a 31-day month (our arithmetic), slightly more than the monthly figure of $350.00.
Daily interest rewards paying down early in the month: a paydown on day 5 stops interest on that amount for the remaining days.
To run it with your own numbers, multiply the balance by the annual rate as a decimal, divide by 365, and multiply by the days the balance stays out. Repeat the step for each change in the balance, then add the pieces; the sum is the interest for the period before any fees.
When the Draw Period Closes and Principal Joins the Payment
Many lines have a draw period, when payments can be interest-only, followed by a repayment period, when principal is added and new draws stop. Illustration only, invented figures: $40,000 at 10.5% turning into a 24-month repayment raises the payment from about $350.00 to about $1,855 (our arithmetic).
Check the draw period, the repayment terms and the renewal date before relying on interest-only payments. Questions can go to the request form or by phone.
By Starbrook Lending · Updated