Legacy Investing CalculatorsShow

Line of credit cost

What does a drawn credit line cost over the chosen number of days?

Your numbers

$
%
days

Interest cost

$226.85

Daily cost$3.78
Amount due if paid then$12,226.85

Tip. This covers interest on the draw only. Add any unused-line or annual fees separately.

Assumptions

  • Simple interest: drawn × APR × days ÷ 365.
  • No fees or minimum interest charges.

Explore the numbers

Examples and charts

Start with a scenario, then read the response curve to see which input actually moves the answer.

Example 1

Two-week gap

A short cash-flow bridge where the interest is genuinely small.

Interest cost

$52.93

Example 2

Two-month bridge

A draw held until an expected payment arrives.

Interest cost

$226.85

Example 3

Draw that drifted

The same balance still outstanding half a year later.

Interest cost

$680.55

Sweeps days drawn from half to one and a half times your value, holding everything else fixed.

Response curve

How days drawn moves the result

Interest cost

$226.85

$100$150$200$250$300$35040 days60 days80 days
Chart axis: Days drawnNow 60 days$227

What this calculates

Estimates simple interest on a drawn line of credit over a chosen number of days, which is the right shape for short bridge borrowing.

How to use it

  1. Start with amount drawn and work down the form, or load an example to begin from a realistic case.
  2. Read the headline result alongside the supporting rows, which show the intermediate figures behind it.
  3. Check the assumptions. They decide what the number includes and, more importantly, what it leaves out.
  4. Sweep days drawn on the response curve to see how much it actually moves the answer.
  5. Run a cautious case as well as an optimistic one before using the estimate in a decision.

Common mistakes

  • Forgetting the draw is principal you still have to repay.
  • Ignoring an unused-line or annual fee that dwarfs the interest on a small draw.
  • Treating a variable line rate as fixed over a long draw.

Formula

Interest = drawn × APR × days ÷ 365

Inputs

  • Amount drawn
  • APR (%)
  • Days drawn (days)

FAQ

Is this how my HELOC or business line actually bills?

Close enough for planning. Real statements often use a daily periodic rate on the average daily balance, and some use a 360-day year, which changes the total slightly.

What if I draw and repay in stages?

Interest accrues on what is outstanding each day, so a partial repayment reduces it immediately. Model each tranche separately, or enter the average balance and the full period.

Why is a line of credit usually cheaper than a card?

Lines are often secured or underwritten against a business, and they charge interest from the draw date rather than carrying a card's penalty pricing. The trade is that a secured line puts an asset at risk.

Are these numbers financial advice?

No. They are educational estimates based on the inputs and assumptions on this page. Confirm important decisions with a qualified professional and your own documents.

Read the full guideLine of credit vs term loan

The questions people usually ask next.