Home equity guide
HELOC vs. cash-out refinance: which one keeps your low rate?
If your first mortgage has a low rate, a HELOC usually lets you keep it. A cash-out refinance replaces it. Here's how to tell which one costs you less.
If your first mortgage rate is well below today's market, a HELOC usually beats a cash-out refinance, because you keep the cheap loan and only pay a newer rate on the new money. A cash-out refinance wins when your current rate is already near the market, when you need a lot of cash compared to what you owe, or when you want one fixed payment and no variable rate.
That's the short answer. I shop both through 175+ lenders, so I don't care which one you pick. For the product details, see my pages on HELOC Orange County options and cash-out refinance in Orange County. This guide is the math that decides between them.
The one question that decides most cases
What rate is on your first mortgage right now?
A lot of Orange County owners bought or refinanced when rates were at the bottom. Many of those loans sit somewhere in the 2s and 3s. If that's you, a cash-out refinance asks you to take a loan you already have at a low rate and reprice the whole thing at today's rate, just to get a slice of new cash.
A HELOC doesn't touch the first mortgage. It's a separate line behind it. The old loan keeps its rate, its balance and its payoff date.
I spent seventeen years at Chase, the last three managing a Southern California lending team. The most common regret I heard from homeowners wasn't about their rate. It was refinancing the whole loan to get sixty grand. They traded a big cheap loan to get a small expensive one, and it was baked into their payment for thirty years.
Blended rate: the math behind "keep your first"
This is the concept most online comparisons skip. When you compare a HELOC to a cash-out refi, don't compare the HELOC rate to the refi rate. Compare what you'd pay across all the money you owe.
Here's an illustration. Round numbers, made up, not a quote:
- Home value: $1,000,000 (illustration)
- Current first mortgage: $400,000, and say your current rate is 3%
- New cash needed: $150,000
Path A, cash-out refinance. You take a new $550,000 first mortgage. Every dollar of it, including the $400,000 you already owed at 3%, now carries the new refi rate. Call that rate R.
Path B, HELOC. The $400,000 stays at 3%. Only the $150,000 carries the HELOC rate. Call that rate H.
First-year interest, roughly:
- Path A: $550,000 × R
- Path B: $12,000 (that's 3% of $400,000) + $150,000 × H
Your blended rate on Path B is ($12,000 + $150,000 × H) ÷ $550,000. The $400,000 at 3% drags the average way down. That's why a HELOC with a higher rate than the refi can still cost less in total.
Put it another way. If your first mortgage is at 3% and the new money would cost several points more, you only pay that higher cost on the new money. With a cash-out refi, you pay the new rate on the old money too.
A quick way to feel it: every 1 percentage point on $400,000 is about $333 a month of interest. So if a cash-out refi's rate lands 3 points above your current 3%, you've added roughly $1,000 a month in interest on money you already owed, before you've spent a dollar of the new cash.
Run your own numbers here:
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Side by side
| HELOC | Cash-out refi | |
|---|---|---|
| What happens to your first mortgage | Stays in place. Same rate, balance and payoff date. | Paid off and replaced by a new, larger first mortgage. |
| Rate type | Usually variable. Some lenders let you lock portions at a fixed rate. | Usually fixed for the life of the loan. Adjustable options exist. |
| Closing costs | Usually lower. Some lines have annual fees or draw minimums. | Full first-mortgage closing costs on the entire new loan amount. |
| Payment structure | Often interest-only during the draw period, then principal and interest during repayment. You pay interest only on what you've drawn. | One fully amortized payment on the whole balance from day one. |
| Best when | Your first rate is low, you need a smaller slice of cash, or you need money over time (a remodel, an ADU, tuition). | Your first rate is near market, you need a large amount, or you want one fixed payment. |
| Risk | Rate can rise. Payment jumps when the draw period ends. Line can be frozen if values fall. | You give up your old rate for good. Total interest can rise because the whole balance restarts on a new term. |
Both loans are secured by your home. Neither one is free money.
When the HELOC wins
- Your first mortgage rate is well below market. This is the big one. The wider the gap, the more a cash-out refi costs you.
- The new money is a small share of the total. $80,000 on top of a $500,000 balance is a HELOC job. Repricing $580,000 to get $80,000 rarely pencils.
- You need the money in stages. A remodel or ADU pays contractors over months. With a line, you draw as bills come in and pay interest only on what's out. I wrote more on that in ADU financing in Orange County.
- You'll pay it back fast. Bonus coming, a house selling, a business payout. A line you can pay down and close costs less to exit than a new 30-year loan.
When the cash-out refinance wins
Yes, it's sometimes the right call. A cash-out refi wins when:
- Your first mortgage rate is already near today's rates. If you bought recently, there's no cheap loan to protect. Consolidating into one loan can be simpler and cost less.
- You need a lot of cash compared to your balance. If the new money is bigger than what you owe, the blended-rate advantage of a HELOC shrinks fast.
- You want a fixed payment and no surprises. Some people sleep better with one fixed number. That's a real reason, not a weak one.
- You're sitting on high-cost debt or an old HELOC. Rolling a HELOC that's about to enter repayment into a fixed first mortgage is a common, sensible move. See what happens when your HELOC draw period ends.
- You have an adjustable first mortgage. If your first is going to reset anyway, refinancing it and taking cash at the same time can make sense.
Second mortgage vs. refinance: what people mix up
"Second mortgage" sounds like a warning sign. It's just a position. A HELOC and a home equity loan are both second mortgages. They sit behind your first.
The difference between the two:
- A HELOC is a line. Draw, repay, draw again during the draw period. Usually variable.
- A home equity loan is a lump sum with a fixed payment. Same "keep your first" logic, but you get all the cash on day one.
There's also a newer, online version, the West Capital Lending Digital HELOC. It's built differently from a bank line, and the details and its disclosures live on the Digital HELOC page.
The downsides of a HELOC, plainly
People ask what the catch is. There are a few, and they're manageable if you know them.
- Variable rate. Most HELOCs float with the prime rate. If rates rise, your payment rises. Every 1 percentage point on $100,000 drawn is about $83 a month of interest.
- The draw period ends. If you've been paying interest only, the payment jumps when principal kicks in. Plan for it from day one.
- Your house is the collateral. Miss payments and you can lose the home. Same as any mortgage.
- Lines can be frozen or cut. After 2008, lenders froze and reduced lines when values dropped. It can happen again.
- Two loans, two payments. Some people don't want to track both.
None of that means a HELOC is a bad idea. It means you size it right and have a plan to pay it down. If you want to see what a line would cost at a few different rates, try the HELOC payment calculator.
How I'd decide, in order
- Write down your current first mortgage rate and balance. Not a guess. Look at the statement.
- Decide how much you need, and when. All at once, or over a year?
- Get real quotes on both. With an APR on each, plus closing costs. Not a rate sheet off a website.
- Compare total interest over the time you'll actually keep the money. Not over thirty years if you plan to pay it off in five.
- Check the exit. What does it cost to pay off each one early? When does the HELOC payment change?
When I run this for a client, they see both options in one table, from multiple lenders. If your current loan already wins and you shouldn't touch it, I'll say that too.
The bottom line
A low first mortgage is an asset. Don't trade it away without doing the math. For most Orange County owners who locked in at the bottom, a HELOC or home equity loan gets the cash without giving up the rate. For owners whose first mortgage is already near market, or who need one fixed payment, a cash-out refinance can be the cleaner answer.
Send me your first mortgage statement and the number you need, and I'll put both on one page for you.
Questions people ask
Is it ever a good idea to do a cash-out refinance?
Yes. A cash-out refinance can make sense when your current first mortgage rate is close to or above today's rates, when the cash you need is large compared to your balance, when you want one fixed payment instead of two loans, or when you're paying off a HELOC that's about to hit its repayment period. If your first mortgage rate is well below the market, a HELOC usually costs less because you only pay the newer rate on the new money.
What is the downside of a HELOC?
Most HELOCs carry a variable rate, so the payment can rise. The payment also changes when the draw period ends and principal payments start. Your home secures the line, and a lender can freeze or reduce a line if values drop. Some lines carry fees or a minimum draw. Knowing these going in is what keeps a HELOC from turning into a problem.
Can I keep my low mortgage rate and still get cash?
Yes. A HELOC or a home equity loan is a second mortgage. It sits behind your first mortgage, which stays exactly as it is, rate and all. You borrow against the equity above your current balance.
Is a second mortgage better than a refinance?
It depends on three numbers: your current first mortgage rate, how much you need, and how fast you'll pay it back. A second mortgage usually wins when your first rate is low and the new money is a smaller slice of the total. A refinance usually wins when your first rate is already near market or you need a lot of cash.
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