What Is a HELOC?
A HELOC (Home Equity Line of Credit) is a revolving credit line secured by your home's equity. If you have ever asked what a HELOC is or how a HELOC payment works, the short answer is this: you borrow against your available equity, pay interest on what you use during the draw period, and later repay principal plus interest during the repayment period.
Unlike a traditional loan where you receive a lump sum upfront, a HELOC lets you borrow as much or as little as you need — up to your credit limit — during a set period. You only pay interest on what you actually use.
To qualify, lenders typically require:
- At least 15–20% equity in your home
- A credit score of 620 or higher (680+ for better rates)
- A debt-to-income ratio below 43%
Estimate Your HELOC Payments
The Two Phases of a HELOC
Draw Period (Typically 5–10 Years)
During the draw period, you can borrow from the credit line freely, much like using a credit card. Most HELOCs require interest-only payments during this phase, which keeps your monthly payments low.
You can borrow, repay, and borrow again — the balance is flexible. This makes HELOCs ideal for ongoing expenses like a multi-phase home renovation.
Repayment Period (Typically 10–20 Years)
Once the draw period ends, you can no longer borrow from the line. Your outstanding balance converts to a fixed repayment schedule, and you'll pay both principal and interest each month.
This is often where borrowers get surprised — payments can increase significantly compared to interest-only payments during the draw period. That jump is commonly called HELOC payment shock, and it is one of the main reasons borrowers should estimate both phases before opening the line.
Example: $80,000 HELOC balance at 8% interest:
- Interest-only payment (draw period): ~$533/month
- Principal + interest payment (20-year repayment): ~$669/month
How HELOC Interest Rates Work
HELOCs almost always have variable interest rates tied to a benchmark, typically the prime rate (which follows the Federal Funds Rate). Your rate is calculated as:
HELOC Rate = Prime Rate + Margin
For example, if the prime rate is 7.5% and your lender's margin is 1%, your rate is 8.5%. When the Fed raises or lowers rates, your HELOC rate moves accordingly.
Some lenders offer a fixed-rate conversion option, letting you lock a portion of your balance at a fixed rate — useful in a rising-rate environment.
HELOC vs. Home Equity Loan vs. Cash-Out Refinance
All three let you access your home's equity, but they work very differently:
| Feature | HELOC | Home Equity Loan | Cash-Out Refi |
|---|---|---|---|
| Structure | Revolving credit line | Lump-sum loan | New mortgage |
| Interest rate | Variable | Fixed | Fixed |
| Draw flexibility | Borrow as needed | One-time disbursement | One-time disbursement |
| Monthly payment | Interest-only during draw | Fixed from day one | Fixed (replaces old mortgage) |
| Closing costs | Low (0–2%) | Moderate (2–5%) | High (2–5% of new loan) |
| Best for | Ongoing or phased expenses | One large known expense | Consolidating at lower rate |
| Risk | Rate fluctuations | Higher initial payment | Resets mortgage term |
When a HELOC makes sense:
- Home renovations spread over time
- Emergency fund backup
- Education expenses paid in installments
- Business startup costs
When a home equity loan makes more sense:
- Debt consolidation
- Single large purchase (new roof, addition)
- You prefer payment predictability
When cash-out refinance makes sense:
- Your existing mortgage rate is higher than current rates
- You want to simplify into one payment
- You need a very large amount
Use our home equity calculator to estimate available equity, our HELOC calculator to model the two payment phases, and our mortgage calculator to compare what a cash-out refi might look like.
HELOC Fees and Costs to Know
HELOCs typically come with lower closing costs than a full mortgage, but there are several fees to watch for:
- Application/origination fee: $0–$500
- Annual fee: $50–$100/year (sometimes waived the first year)
- Inactivity fee: Charged if you don't use the line
- Early termination fee: If you close the HELOC within 2–3 years
- Closing costs: Often 0–2% of the credit limit
Some lenders advertise "no closing cost" HELOCs — read the fine print. They often recover costs through slightly higher interest rates.
Key Risks to Understand
Your home is collateral. Unlike credit cards or personal loans, defaulting on a HELOC can lead to foreclosure. Only borrow what you can comfortably repay.
Variable rates can rise. If interest rates increase significantly, your payments will too. Budget for rate increases when planning HELOC use.
Reduced equity reduces flexibility. Drawing heavily on your HELOC reduces your home equity, potentially affecting your ability to refinance or sell.
Payment shock at repayment. The transition from interest-only to full principal+interest payments can be jarring. Plan for it well in advance.
Is a HELOC Right for You?
A HELOC works best when:
- You have a specific use with a clear plan to repay
- You're comfortable with a variable rate and the possibility of higher payments
- You don't need all the funds at once — flexibility is valuable for your situation
- The purpose adds value (home improvement) or replaces higher-cost debt
If you're borrowing to fund lifestyle expenses or consumption without a repayment strategy, a HELOC can become a debt trap. The flexibility that makes it powerful also makes it easy to overuse.
See our loan calculator to model different repayment scenarios and find a comfortable monthly payment target before committing.
Key Takeaways
- A HELOC is a revolving credit line secured by home equity — borrow, repay, and borrow again
- The draw period (interest-only) is followed by the repayment period (principal + interest)
- Rates are variable and tied to the prime rate — they move with the Fed
- HELOCs have lower upfront costs than home equity loans or cash-out refinances
- Compared to home equity loans: HELOCs offer flexibility; equity loans offer rate certainty
- Your home is collateral — only borrow what you can repay