Loans

Interest-Only Line of Credit Calculator

Estimate interest-only payments on a HELOC or business line of credit, then model the repayment phase.

Inputs

Credit limit

Maximum you can draw on the line.Current balance drawn

Interest rate (APR)

Variable rates are common on lines of credit.Interest-only draw period

years

Repayment period after draw

years

Extra principal during draw

Optional. Applied each month on top of the interest-only payment.

Interest-only payment

$177.08

First month, at current balance

Payment if maxed out

$354.17

At full credit limit

Repayment phase payment

$216.96

Principal + interest for 20 yr

Utilization

50.0%

$25,000 available

Interest during draw

$21,250.00

Interest during repayment

$27,069.42

Total interest

$48,319.42

Total paid

$73,319.42

Principal vs. interest (lifetime)

Monthly payment by phase

Balance over time

Month	Payment	Principal	Interest	Balance
1	$177	$0	$177	$25,000
2	$177	$0	$177	$25,000
3	$177	$0	$177	$25,000
4	$177	$0	$177	$25,000
5	$177	$0	$177	$25,000
6	$177	$0	$177	$25,000
7	$177	$0	$177	$25,000
8	$177	$0	$177	$25,000
9	$177	$0	$177	$25,000
10	$177	$0	$177	$25,000
11	$177	$0	$177	$25,000
12	$177	$0	$177	$25,000