HELOC · Payment examples · 4 min read
$100,000 HELOC Monthly Payment: California Examples
By Mike Basti, President and Mortgage Broker · NMLS #322904·On a $100,000 HELOC, the interest-only payment during the draw period is about $500 a month at a 6% example rate and about $833 at 10%. Once the draw period ends and you repay the full balance over 20 years, the same $100,000 costs about $716 to $965 a month at those rates. These are examples, not quotes.
$100,000 HELOC payment at different example rates
| Example rate | Interest-only (draw period) | Principal + interest (20-yr repayment) | Principal + interest (15-yr repayment) |
|---|---|---|---|
| 6% (example) | $500 | $716 | $844 |
| 7% (example) | $583 | $775 | $899 |
| 8% (example) | $667 | $836 | $956 |
| 9% (example) | $750 | $900 | $1,014 |
| 10% (example) | $833 | $965 | $1,075 |
Most HELOCs have two stages. During the draw period, often 10 years, many lenders let you pay interest only on what you have borrowed. During the repayment period, often 20 years, you pay principal and interest and can't draw more. The table assumes the full $100,000 is drawn.
If you only draw part of the line
You pay interest only on the amount you have actually used, not the full credit limit. At an 8% example rate:
| Amount drawn | Interest-only payment | Repayment payment (20 years) |
|---|---|---|
| 25% ($25,000) | $167 | $209 |
| 50% ($50,000) | $333 | $418 |
| 75% ($75,000) | $500 | $627 |
| 100% ($100,000) | $667 | $836 |
Why the payment jumps after the draw period
At an 8% example rate, moving from interest-only to 20-year repayment on a fully drawn $100,000 line raises the payment by about $170 a month. That jump catches people off guard. Plan for it from day one: pay some principal during the draw period, or budget for the repayment amount rather than the interest-only amount.
Most HELOCs also have a variable rate tied to the prime rate, so the payment can change even before the draw period ends. Some lenders let you lock part of the balance at a fixed rate. If you want a fixed payment from the start, compare a fixed-rate home equity loan.
How much equity you need for a $100,000 HELOC
Lenders cap the combined loan-to-value (CLTV): your first mortgage plus the new line, divided by the home's value. Many lenders allow 80% to 90% CLTV, depending on credit, property type and how income is documented. Here is the home value needed for a $100,000 line:
| Current first mortgage balance | Home value needed at 80% CLTV | Home value needed at 90% CLTV |
|---|---|---|
| $300,000 | $500,000 | $444,444 |
| $500,000 | $750,000 | $666,667 |
| $700,000 | $1,000,000 | $888,889 |
Requirements vary by lender. See HELOC requirements in California.
What we see in our files
Across 500+ HELOCs and second mortgages we've arranged since 2009, the typical line is $100,000 to $250,000, the typical borrower has a credit score around 700, and most keep their combined loan-to-value under 70%. Paying off higher-interest debt is the most common use. Typical closing time is 14 to 21 days. Full details are in our 2026 HELOC and second mortgage report.
Run your own numbers
Use the HELOC calculator with your own balance and rate, or compare a HELOC, home equity loan and cash-out refinance. Other amounts: $50,000 HELOC payment, $200,000 HELOC payment.
Sources & further reading (checked November 14, 2026): CFPB: What is a HELOC? · CFPB: Home equity loan vs. HELOC · CFPB: What is a debt-to-income ratio?
About Save Financial: an independent California mortgage broker (company NMLS #377740, DRE #01875766) since 2009, with offices in Newport Beach and Marina del Rey, shopping 20+ wholesale lenders on each file. This page is general education, not a loan offer, rate quote or commitment to lend. For your numbers, apply online or call 949-379-5320.