The short answer
A HELOC (home equity line of credit) is a revolving credit line secured by your home's equity. You're approved for a maximum limit, then during a 10-year "draw period" you borrow, repay, and re-borrow as needed — paying interest only on the balance you actually use. After the draw period, a 20-year "repayment period" begins where you pay back principal plus interest. The rate is usually variable, tied to the Prime Rate.
Think of a HELOC less like a loan and more like a credit card backed by your house — with a much lower rate. Instead of receiving a lump sum, you get access to a pool of money you can tap whenever you need it, which makes it the go-to tool for ongoing or uncertain costs like a multi-stage remodel.
Phase 1: the draw period
The draw period typically lasts 10 years. During this time you can borrow up to your credit limit, repay some or all of it, and borrow again — as many times as you want. Most lenders require interest-only payments during this phase, so your monthly payment is small and depends only on how much you've drawn. Draw $20,000 and you pay interest on $20,000; draw nothing and you pay nothing.
Access usually comes through a check, an online transfer, or a linked card. Because the rate is variable, your interest-only payment moves up or down with the Prime Rate.
Phase 2: the repayment period
When the draw period ends, the repayment period — usually 20 years — begins. Two things change: you can no longer draw new funds, and your payment converts to fully amortizing principal-and-interest. This is the moment borrowers feel "payment shock," because a $50,000 balance that cost ~$333/month interest-only can jump to ~$450–$500/month once principal is included. Planning for that shift is the single most important part of using a HELOC responsibly.
How much you can borrow
Lenders size your line off your combined loan-to-value (CLTV) — your first mortgage plus the new HELOC divided by the home's value. Most California lenders allow 80–90% CLTV. Here's the math on a typical California home:
| Item | Amount |
|---|---|
| Home value | $900,000 |
| Max lien at 85% CLTV | $765,000 |
| Existing first mortgage | − $400,000 |
| Available HELOC line | $365,000 |
HELOC vs. the alternatives
A HELOC isn't the only way to tap equity. Choose based on whether you want flexibility or a fixed payment:
- HELOC — revolving, variable rate, draw as needed. Best for ongoing/uncertain costs. See our HELOC program and HELOC calculator.
- Home equity loan (HELOAN) — fixed-rate lump sum, second mortgage. Best for a known one-time amount. See HELOAN.
- Cash-out refinance — replaces your first mortgage with a larger one. Best when today's rate also improves your first mortgage. See cash-out refinance.
Rule of thumb: if you need money over time and want to pay only for what you use, a HELOC wins. If you want one fixed sum at a fixed rate, compare a HELOAN or cash-out refinance. A California broker can price all three side by side — read our full HELOC vs. home equity loan vs. cash-out comparison.
How Save Financial helps
Save Financial is a California mortgage brokerage (NMLS #377740, DRE #01875766) that shops HELOCs, HELOANs, and cash-out refinances across 40+ wholesale lenders, so you get the sharpest rate and CLTV for your situation instead of one bank's offer. Estimate your payment with our HELOC calculator, then get a real quote — free, no credit pull to start.
Frequently asked questions
How does a HELOC work step by step?
A HELOC works in two phases. During the draw period (usually 10 years) you can borrow against your approved credit line, repay, and borrow again — paying interest only on what you use, often interest-only. When the draw period ends, the repayment period (usually 20 years) begins: you can no longer draw, and you repay the balance as a fully amortizing loan of principal plus interest.
What is the monthly payment on a HELOC?
During the draw period, most HELOCs require interest-only payments, so your payment equals the balance times the current variable rate divided by 12. Example: a $50,000 balance at 8% is about $333/month interest-only. In the repayment period the payment jumps because you're now paying principal too. Use our HELOC calculator to estimate both phases.
Is a HELOC a good idea?
A HELOC is a strong tool for flexible, ongoing needs — home renovations, tuition, or as a standby emergency line — because you only pay for what you draw. It's riskier for one-time lump sums (a home equity loan or cash-out refinance with a fixed rate may be better) and its variable rate means payments can rise. It's secured by your home, so missed payments risk foreclosure.
How much can I borrow with a HELOC?
Most lenders let you borrow up to 80–90% of your home's value minus your existing mortgage (your combined loan-to-value, or CLTV). Example: a $900,000 California home with a $400,000 mortgage at 85% CLTV supports up to about $365,000 in total liens, or roughly a $365,000 HELOC line.
HELOC vs. home equity loan vs. cash-out refinance — which is best?
A HELOC is a revolving, variable-rate line you draw as needed. A home equity loan is a fixed-rate lump sum second mortgage. A cash-out refinance replaces your first mortgage with a bigger one and gives you the difference in cash. HELOCs win on flexibility; the other two win when you want a fixed rate and a one-time amount.
Save Financial, Inc. — NMLS #377740, DRE #01875766. Equal Housing Opportunity. Figures are illustrative for 2026 and not an offer of credit or a guarantee of rates or approval.