What the heloc calculator tells you
A HELOC (home equity line of credit) is a revolving line of credit secured by your home’s equity. Instead of a single lump sum, you get a credit limit you can borrow against, repay, and borrow again — paying interest only on what you have actually drawn.
Most HELOCs have two phases. During the draw period (often around 10 years) you can pull funds and typically make interest-only payments. When the repayment period begins, you can no longer draw, and your payment jumps to a fully amortizing amount that pays the balance down to zero over the remaining term.
That flexibility makes a HELOC popular for investors who need capital on demand — covering a rehab, bridging to a flip, or funding a down payment. On the off-market Miami deals we source, fast access to equity can be the difference between landing a property and watching it go.
How it works
- Calculate your available line: available line = (home value × maximum CLTV%) − current mortgage balance. CLTV is often capped around 80%–90%.
- Decide how much of that line you actually draw — you only pay interest on the drawn amount, not the full limit.
- During the draw period, the interest-only payment = amount drawn × (annual rate ÷ 12).
- When the repayment period starts, the calculator switches to a fully amortizing payment that retires the balance over the remaining term.
- Compare the two payments so you are ready for the step-up when interest-only ends.
Frequently asked questions
How does a HELOC work?
A HELOC gives you a revolving credit line secured by your home, with a limit based on your equity and the lender’s CLTV cap. You draw funds as needed during a draw period (often about 10 years) and usually pay interest only on what you borrow. After the draw period ends, you enter a repayment period where you can no longer draw and pay down the balance with larger, fully amortizing payments.
What is the difference between a HELOC and a home equity loan?
A home equity loan is a one-time lump sum at a fixed rate with a fixed payment. A HELOC is a reusable credit line, usually at a variable rate, where you borrow and repay repeatedly and pay interest only on the drawn balance during the draw period. Choose a HELOC for flexible, ongoing access and a home equity loan for a single, known expense.
How is a HELOC payment calculated?
During the draw period, the payment is typically interest only: the amount you have drawn multiplied by the monthly rate (annual rate ÷ 12). For example, a $50,000 balance at 8% costs about $50,000 × (0.08 ÷ 12) ≈ $333 a month. In the repayment period the payment becomes fully amortizing, covering both principal and interest over the remaining term, so it is noticeably higher.
What is the draw period on a HELOC?
The draw period is the window — commonly around 10 years — during which you can borrow from the line and usually make interest-only payments. Once it ends, the repayment period begins: you can no longer draw, and you repay the outstanding balance with amortizing payments, often over the next 10–20 years. Planning for that payment jump is essential.
Can I use a HELOC to buy an investment property?
Yes. Investors frequently use a HELOC on a primary home or another property to fund a down payment, an all-cash purchase, or a rehab, then repay the line after refinancing or selling. The appeal is on-demand capital and interest only on what you draw; the risk is a variable rate and the fact that your home secures the debt, so a delayed deal still accrues interest.
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