Quick answer
A first-lien HELOC is a home equity line of credit in first position. It pays off your mortgage, or sits on a home you own free and clear, so there's no other loan ahead of it. Interest is charged on the daily balance, and the rate is usually variable. It can save interest if you keep a lot of cash flowing through it. It usually doesn't make sense if your current mortgage rate is low and fixed.
How a first-lien HELOC works
A normal HELOC sits behind your mortgage. A first-lien HELOC is the only loan on the home. It either pays off your existing mortgage or goes on a home with no mortgage at all.
You get a credit limit and draw from it like any HELOC. Interest is figured on the balance each day. Some first-lien HELOCs work like a checking account: your paycheck goes in, your bills come out, and every dollar sitting in the account lowers the balance you pay interest on.
The math behind the paycheck strategy
Example only. You move a $250,000 balance onto a first-lien HELOC at an example 8% variable rate. Interest on $250,000 is about $1,667 a month.
Now say $8,000 of take-home pay lands in the line each month and you spend it down over the month. Your average balance might sit around $242,000 instead of $250,000. That trims interest to about $1,613, saving roughly $54 that month. Any money you don't spend stays in the line and keeps lowering the balance.
The savings come from spending less than you earn and leaving the difference in the line. The account structure doesn't create savings on its own. If you'd spend the money anyway, the benefit is small.
First-lien HELOC vs. a traditional mortgage
| Factor | First-lien HELOC | 30-year fixed mortgage |
|---|---|---|
| Rate | Usually variable | Fixed |
| Payment | Often interest-only during the draw period | Same principal and interest every month |
| Access to equity | Draw any time up to the limit | Need a refinance or second loan |
| Interest | On the daily balance | On the scheduled balance |
| Typical max loan-to-value | Often 80% or less | Up to 97% for some purchases |
| Discipline needed | High | Low |
Who a first-lien HELOC fits
- High, steady income with cash left over each month. The bigger the surplus you leave in the line, the more it saves.
- Homes owned free and clear where the owner wants a ready credit line in first position.
- Borrowers who already have a variable-rate mortgage and want more flexibility.
- Investors who move money in and out and want low interest during short holds.
Risks to weigh
- Rate changes. If rates rise, so does your cost on the whole balance, including the part that used to be your mortgage.
- Giving up a low fixed rate. Moving a 3% to 4% mortgage onto a variable line usually costs more, not less.
- Easy access cuts both ways. The line makes it simple to borrow back what you paid down.
- The draw period ends. After that, payments include principal and can jump. See what happens when the draw period ends.
- Fewer lenders. Fewer programs offer first-lien HELOCs, and approval can be stricter.
On a paid-off home
If you own the home outright, any HELOC you open is automatically in first position. That's often the simplest way to keep cheap, flexible access to your equity. More here: HELOC on a paid-off house.
FAQ
What is a first-lien HELOC?
A home equity line of credit in first position, with no other mortgage ahead of it. It either replaces your mortgage or sits on a home you own free and clear.
Is a first-lien HELOC a good idea?
It can be if you have a high income with money left over each month, discipline, and no low fixed-rate mortgage to give up. For most people with a low fixed rate, keeping the mortgage and adding a regular HELOC is cheaper.
Are first-lien HELOC rates lower than regular HELOC rates?
Often a little, because the lender is first in line. They're usually still variable, and can be higher than a fixed first mortgage rate.
Can I get a HELOC on a house with no mortgage?
Yes. On a paid-off home, any HELOC is automatically in first position.
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