HELOC Calculator CalculatorScale.com
Revolving Line of CreditTwo-Phase Amortization

Home Equity Line of Credit (HELOC) Calculator

Model interest-only payments during the draw period, fully amortizing payments during the repayment period, and estimate your maximum HELOC borrowing limit based on home equity.

Modify the values and click the Calculate button to use

• Draw Period (Interest-Only): During the initial draw phase, payments cover only accrued monthly interest without reducing the principal balance.

• Repayment Period (P&I): The line of credit closes to new draws, and the principal is amortized into fixed monthly payments over the remaining term.

1. HELOC Payment & Amortization Calculator

$
%
Interest-only
Amortized P&I
Results
Draw Period (5 Yrs)

$333.33

Interest-Only / Mo
Repayment (15 Yrs)

$477.83

Amortized P&I / Mo
Total of 240 Payments$106,008.69
Total Interest Paid$56,008.69

Loan Amount vs. Total Interest Breakdown

Amortization Schedule

Review interest-only draw payments followed by principal amortizing repayment.

Balance & Cumulative Interest Trajectory (Draw vs. Repayment)

YearPhaseInterestPrincipalEnding Balance
Year 1Draw (Interest-Only)$4,000.00$0.00$50,000.00
Year 2Draw (Interest-Only)$4,000.00$0.00$50,000.00
Year 3Draw (Interest-Only)$4,000.00$0.00$50,000.00
Year 4Draw (Interest-Only)$4,000.00$0.00$50,000.00
Year 5Draw (Interest-Only)$4,000.00$0.00$50,000.00
Year 6Repayment (P&I)$3,934.99$1,798.92$48,201.08
Year 7Repayment (P&I)$3,785.68$1,948.23$46,252.84
Year 8Repayment (P&I)$3,623.98$2,109.94$44,142.91
Year 9Repayment (P&I)$3,448.85$2,285.06$41,857.85
Year 10Repayment (P&I)$3,259.19$2,474.72$39,383.13
Year 11Repayment (P&I)$3,053.79$2,680.12$36,703.01
Year 12Repayment (P&I)$2,831.35$2,902.57$33,800.44
Year 13Repayment (P&I)$2,590.43$3,143.48$30,656.97
Year 14Repayment (P&I)$2,329.53$3,404.39$27,252.58
Year 15Repayment (P&I)$2,046.96$3,686.95$23,565.63
Year 16Repayment (P&I)$1,740.95$3,992.96$19,572.67
Year 17Repayment (P&I)$1,409.54$4,324.38$15,248.29
Year 18Repayment (P&I)$1,050.61$4,683.30$10,564.99
Year 19Repayment (P&I)$661.90$5,072.01$5,492.98
Year 20Repayment (P&I)$240.93$5,492.98$0.00

2. The Amount of Line of Credit You Can Borrow

Estimate your maximum home equity line of credit amount based on property value and lender CLTV limits.

$
$
Result
You may borrow up to:

$230,000.00

Your current loan-to-value ratio: 41.7%
Max Allowable Combined Debt (80%):$480,000.00
Current 1st Mortgage Balance:$250,000.00

Underwriting & Qualification Notes

There are other factors that may affect the home equity line of credit amount you qualify for, such as your credit history. Applicants with a credit score below 630 may not qualify.

Your other debts can also affect the amount you are eligible for. In general, lenders typically won't approve a loan for borrowers with a debt-to-income (DTI) ratio of 43% or higher.

HELOC Fundamentals

What is a Home Equity Line of Credit (HELOC)?

A Home Equity Line of Credit (HELOC) is a revolving credit facility secured by your home's equity. Unlike a standard mortgage or fixed home equity loan, a HELOC functions much like a credit card: you are approved for a maximum borrowing limit and can draw and repay funds as needed during the draw period.

1. Draw Period (Years 1–10)

During this phase, you can borrow funds up to your credit limit. Most lenders only require interest-only monthly payments on the active balance drawn, keeping initial out-of-pocket costs low.

2. Repayment Period (Years 11–30)

Once the draw period ends, the line of credit closes. You can no longer withdraw funds, and the outstanding balance is amortized into monthly principal and interest payments until paid off.

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