Home Equity Loan vs HELOC Calculator: Which One Costs Less?

Both a home equity loan and a HELOC let you borrow against your home's equity. They serve different purposes, carry different risks, and cost different amounts depending on how rates move.

Getting this choice wrong means either paying too much in interest or losing flexibility when you need it.

The Core Difference

Home Equity Loan: A lump sum disbursed at closing. Fixed interest rate. Fixed monthly payment. Repaid over 5-30 years. Works like a second mortgage.

HELOC (Home Equity Line of Credit): A revolving credit line. Variable rate (typically prime + margin). Draw what you need, when you need it. Pay interest only during the draw period. Full repayment during the repayment period.

Side-by-Side Numbers

$50,000 borrowed, 10-year repayment, current market rates:

| | Home Equity Loan | HELOC | |--|-----------------|-------| | Rate | 8.5% fixed | Prime + 0.5% = 8.0% variable | | Monthly payment | $620 | $606 (interest-only draw period) | | Total interest (if rate holds) | $24,400 | $22,800 |

At current rates, the HELOC is cheaper if rates stay flat. But HELOC rates are variable.

If prime rate rises 1.5% over the loan period:

• HELOC effective rate: 9.5% average
• HELOC total interest: $29,700
• Home equity loan advantage: $5,300 less interest

If prime rate falls 1% over the loan period:

• HELOC effective rate: 7.0% average
• HELOC total interest: $19,000
• HELOC advantage: $5,400 less interest

The fixed vs. variable question is a bet on rate direction.

When the Home Equity Loan Wins

Single large expense with known amount. Kitchen renovation, addition, medical procedure, debt consolidation. You know the number. Borrow it, repay it, done. The fixed rate and fixed payment make budgeting simple.

Rate environment risk. If you believe rates are more likely to rise than fall, the home equity loan locks in the current rate. Variable rate debt in a rising rate environment becomes expensive quickly.

Long time horizon. The longer you borrow, the more rate variability affects total cost. A 20-year fixed rate exposure locks out uncertainty for decades.

When the HELOC Wins

Ongoing, uncertain expenses. Home renovation with multiple phases. College tuition over 4 years. Business cash flow supplement. You draw when needed, pay back, redraw. The flexibility matches the irregular cash flow.

Short-term borrowing. If you will repay within 1-2 years, the HELOC rate risk is minimal. Pay interest only during the draw period, repay when the asset arrives (property sale, bonus, settlement).

Rate environment opportunity. If rates fall after you open the HELOC, your cost decreases automatically. No refinancing required.

Conservative initial amount needed. You only pay interest on what you draw. A $100,000 HELOC with $20,000 drawn costs interest on $20,000, not $100,000.

HELOC Draw and Repayment Periods

HELOCs have two phases:

Draw period (typically 5-10 years): Access funds freely. Pay interest only on the balance drawn. Principal payment is optional (but recommended to avoid payment shock).

Repayment period (typically 10-20 years): The line closes. Repay principal plus interest on the outstanding balance. The payment jumps from interest-only to full amortization.

Payment shock example:

• $80,000 balance at end of draw period
• Draw period payment (interest only at 8%): $533/month
• Repayment period payment (principal + interest, 15 years at 8%): $764/month

The $231/month jump surprises borrowers who assume the payment stays the same. Model the repayment period from day one.

Tax Deductibility

Interest on home equity loans and HELOCs is deductible if the funds are used to "buy, build, or substantially improve" the home securing the loan. The deduction requires itemizing.

Using home equity to consolidate credit card debt, fund a vacation, or buy a car: interest is NOT deductible under current law.

Using home equity to add a bathroom, renovate the kitchen, or replace the roof: interest IS deductible (subject to the mortgage interest deduction limits).

This distinction affects the true cost comparison. Home improvement uses get a tax benefit; consumer uses do not.

LTV Limits and Qualifying

Both products require sufficient home equity. Lenders typically allow combined loan-to-value (CLTV) of 80-90%.

Example:

• Home value: $450,000
• Primary mortgage balance: $300,000
• Available equity: $150,000
• CLTV limit (85%): $382,500
• Maximum home equity borrowing: $382,500 - $300,000 = $82,500

To qualify, lenders also check:

• Credit score (720+ gets best rates, 680 minimum for most products)
• Debt-to-income ratio (below 43% for most lenders)
• Income verification

Frequently Asked Questions

Can I convert a HELOC to a fixed rate?

Many lenders offer rate lock options on HELOCs. You can lock a portion or all of the outstanding balance at a fixed rate, converting it to a home equity loan-like instrument within the HELOC structure. Terms vary by lender.

What happens to my HELOC if I sell the house?

The HELOC must be paid off at closing from sale proceeds. The title company handles this. Plan accordingly if you intend to sell before the HELOC is paid.

Is a cash-out refinance better than a home equity loan or HELOC?

In low-rate environments, cash-out refi lets you fold the equity access into your primary mortgage at a competitive rate. With primary mortgage rates above 6.5-7%, refinancing your first mortgage to access equity is often more expensive than keeping the first mortgage and opening a second lien (home equity loan or HELOC). Compare the blended rate of both scenarios.