First Lien HELOC Glossary: Every Term Explained

Essential Terms

First Lien HELOC

A home equity line of credit that sits in the primary (first) lien position on your property, replacing your traditional mortgage. Unlike second-lien HELOCs, a first lien HELOC becomes your main home loan. See how it works.

Average Daily Balance

The method of calculating interest based on the average of your balance for every day in the billing cycle. Each deposit immediately reduces the average, lowering interest charges. This is the foundation of why velocity banking works. Contrast with amortized interest. See why this matters.

Amortization

The process of spreading a loan into fixed periodic payments where early payments are mostly interest and later payments are mostly principal. A 30-year mortgage uses amortization. In year one, roughly 80% of each payment goes to interest.

Velocity Banking

A debt payoff strategy that uses a first lien HELOC as an all-in-one financial hub. By depositing income directly against the HELOC balance and only withdrawing for expenses, the borrower reduces their average daily balance and pays off their home in 5-7 years. See the complete guide.

Sweep Account / Sweep Function

An automatic feature in qualifying first lien HELOCs that moves money between your checking sub-account and the HELOC principal. Income sweeps against the balance; expenses pull from available credit. This happens without manual transfers. See how the sweep works.

Draw Period

The initial phase (typically 10-15 years) during which you can borrow, repay, and re-borrow up to your credit limit. Interest-only payments are usually available during this period. This is when velocity banking is most effective.

Repayment Period

The phase after the draw period (typically 10-20 years) during which you can no longer draw additional funds and must repay the outstanding balance. With velocity banking, most borrowers pay off entirely during the draw period.

Index

A benchmark interest rate tied to the treasury bond market that serves as the variable component of your HELOC rate. Common indexes include the 1-Month T-Bill, 1-Year T-Bill, and 1-Year CMT (Constant Maturity Treasury). The index fluctuates with bond market conditions — it is not set by your lender.

Margin

The percentage added to the index to determine your HELOC interest rate. Your margin is set at closing based on credit score, LTV, and lender criteria, and remains fixed for the life of the loan. Only the index fluctuates.

Loan-to-Value Ratio (LTV)

Your total mortgage debt divided by your home's appraised value. An LTV of 90% means you have 10% equity. Most first lien HELOC lenders require 90% LTV or lower (10%+ equity). PMI may be required for LTVs above 80%.

Debt-to-Income Ratio (DTI)

Your total monthly debt payments divided by gross monthly income. Most lenders require DTI below 43-50% for first lien HELOC qualification.

Monthly Surplus

Your take-home income minus all monthly expenses. This is the engine of velocity banking — the larger your surplus, the faster your payoff. A $2,500/month surplus on a $300,000 balance yields a roughly 6-year payoff.

Lien Position

The priority order of claims on a property. First lien has the highest priority in the event of default. A first lien HELOC replaces your mortgage in the first position; a traditional HELOC sits behind the mortgage in second position.

Interest-Only Payment

A payment option during the draw period where you only pay accrued interest, not principal. This maximizes cash flow flexibility for velocity banking by ensuring your entire surplus targets principal reduction voluntarily.

Cash-Out Refinance

Replacing your existing mortgage with a new, larger loan and receiving the difference in cash. An alternative to a HELOC for accessing equity, but with fixed terms and significant cost differences.

Equity

The portion of your home's value that you own outright — home value minus outstanding mortgage balance. A home worth $400,000 with a $300,000 mortgage has $100,000 (25%) equity.

FirstLienHELOC.com is an educational platform. We are not a licensed lender. Results vary based on individual financial circumstances.