A HELOC is a credit line secured by your home — a second lien that sits behind your existing mortgage without disturbing it. Program structures vary more than most borrowers expect: some lines revolve, letting you draw as needs arrive; others fund fully at signing with the ability to redraw as you repay. Draw periods, repayment schedules, and interest-only availability all differ by program too. None of that is a problem — it's the menu. Matching the structure to what you're actually funding is the placement work, and it happens before the application, not after.
The rate, plainly: HELOCs come in two forms — fixed and variable, both available outright. A fixed line locks your payment certainty in from the start. A variable line is priced as an index plus a margin: the index (usually the prime rate) moves with the Federal Reserve, in both directions, while your margin is set at placement and stays put. Which form fits depends on how long you'll carry the balance and what payment certainty is worth to your plan — that's part of the strategy call, not something you should have to guess at.
Terms run from ten to thirty years across my lender network, each with its own draw-period rules; longer terms trade speed of payoff for lower payments. The right term follows from what you're funding — a staged renovation and a one-time buyout shouldn't be on the same clock.
One more mechanic worth knowing: on a primary residence, federal law gives you a three-business-day window to cancel after you sign — funds release when it ends. It’s a consumer protection, and it’s already inside the funding timeline. (Second homes and investment properties skip this window; see the FAQs.) Calculate your equity.