Calculate HELOC payments
Calculating HELOC payments means modeling two phases of the same drawn balance. The HELOC Calculator needs drawn amount, annual rate, draw period years and repayment period years. During the draw period, payment covers interest on what is drawn. During repayment, the balance amortizes over the repay years at a higher payment.
QuickCalculators reports both phase payments and the increase between them.
Only the drawn balance earns interest in this model, not the unused credit line.
Pay interest-only during the draw period
Paying interest-only during the draw period keeps the monthly cost tied to outstanding draws. The HELOC Calculator multiplies drawn balance by the periodic rate for the draw-phase payment. New draws would raise that payment in practice; this page treats drawn as a fixed input for clarity.
QuickCalculators keeps principal unchanged across draw periods under the interest-only assumption.
Interest-only draw payments can look manageable while debt is still revolving, which is why the repayment jump must be checked next.
Repay the balance in the repayment period
Repaying the balance in the repayment period amortizes the drawn amount over the remaining term. The HELOC Calculator solves a fixed payment that clears principal and interest across repay years. When the repayment window is shorter, the jump from IO to amortizing is larger.
Extending repay years softens the payment but raises total interest. QuickCalculators shows that tradeoff when repay years change.
Plans that rely only on the draw payment understate the true carrying cost of the line.
See the payment jump between phases
Seeing the payment jump between phases is the main HELOC risk. The HELOC Calculator places draw and repayment payments side by side so the increase is explicit. A $50,000 draw at 8% might cost a few hundred dollars interest-only per month, then require a substantially higher amortizing payment once repayment begins.
QuickCalculators flags that rise because it is where budgets break.
Unlike a home equity loan's single amortizing payment from day one, a HELOC defers principal paydown until the repayment phase.
Read the disclaimer
QuickCalculators labels HELOC Calculator results as estimates for information only. The HELOC Calculator does not provide lending or financial advice. Variable rates, fees, credit limits and lender minimums sit outside this model.
Correct a common misconception: HELOC and home equity loan are the same product
A common misconception is that a HELOC is just another name for a home equity loan. A HELOC is a revolving line with draw and repay phases; a home equity loan is usually a fixed lump sum that amortizes from the start. The HELOC Calculator models the two-phase structure on purpose.
Frequently asked questions
What does the HELOC Calculator compute?
The HELOC Calculator computes draw-period interest-only payments and the repayment-period amortizing payment for a drawn balance, rate, draw years and repay years on QuickCalculators.
Is the draw payment interest-only?
Yes, in this model the draw phase pays interest only on the drawn balance. Actual HELOC minimums can vary by lender.
Why do payments rise in repayment?
Payments rise because amortization of principal begins over the repayment years. The HELOC Calculator shows that higher payment explicitly.
How is a HELOC different from a home equity loan?
A HELOC revolves and has separate draw and repay phases. A home equity loan typically disburses once and amortizes immediately. Use the Home Equity Loan Calculator for the lump-sum case.
Summarize the HELOC Calculator
The HELOC Calculator models interest-only draw payments and amortizing repayment payments on a drawn home equity balance. QuickCalculators highlights the phase jump and labels results as estimates, not advice.