HELOC Calculator

Calculate HELOC payments during the draw period and repayment period. See your maximum borrowing power based on home equity and 85% LTV limits.

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How to Use This Calculator

A Home Equity Line of Credit (HELOC) lets you borrow against your home equity as needed, similar to a credit card but with much lower interest rates because your home serves as collateral. This calculator helps you understand the two distinct phases of a HELOC. During the draw period (typically 5-10 years), you can borrow up to your credit limit and usually make interest-only payments. Once the draw period ends, the repayment period begins (typically 10-20 years), during which you can no longer borrow and must repay both principal and interest in fully amortizing payments. The payment jump from draw to repayment period can be significant — sometimes doubling or tripling — so planning ahead is critical. Most lenders limit your total borrowing to 85% of your home value minus your existing mortgage balance, known as the combined loan-to-value (CLTV) ratio. HELOCs typically carry variable interest rates tied to the prime rate, which means your payments can fluctuate as rates change. This calculator helps you estimate payments under both phases so you can budget appropriately and determine whether a HELOC or a fixed-rate home equity loan is the better choice for your needs.

Frequently Asked Questions

What is the difference between a HELOC and a home equity loan?
A HELOC is a revolving line of credit with variable rates — you borrow as needed during the draw period and pay interest only on what you use. A home equity loan gives you a lump sum at a fixed rate with fixed monthly payments from day one. HELOCs offer flexibility; home equity loans offer predictability. Choose a HELOC for ongoing expenses (home renovations, education) and a home equity loan for a one-time need.
How much can I borrow with a HELOC?
Most lenders allow you to borrow up to 85% of your home's value minus your existing mortgage balance. On a $400,000 home with a $250,000 mortgage: $400,000 x 0.85 = $340,000 minus $250,000 = $90,000 maximum HELOC. Some lenders go up to 90% CLTV, while others cap at 80%.
What happens when the HELOC draw period ends?
When the draw period ends, you enter the repayment period. You can no longer borrow additional funds, and your payments convert from interest-only to fully amortizing principal and interest payments. This can cause a significant payment increase. For example, a $40,000 balance at 8.5% goes from about $283/month (interest-only) to roughly $347/month over a 20-year repayment period.

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