HELOC vs Home Equity Loan: Compare Payments and Risk

A home equity loan gives you one lump sum, usually repaid in level payments. A home equity line of credit (HELOC) lets you borrow repeatedly up to a limit, and its payment changes as the balance and the rate change. The mistake to avoid is comparing only the first payment. In the $50,000 example below, a HELOC payment of $333.33 a month looks cheaper than a fixed loan payment of $606.64. But the HELOC payment is interest-only, it rises to $477.83 when repayment starts even if the rate never moves, and the whole arrangement lasts ten years longer. All rates and terms here are hypothetical.

What changes between a line of credit and a lump-sum loan?

The CFPB describes the core difference this way. With a home equity loan you receive a specific amount as a lump sum, and the rate may be fixed or adjustable. With a HELOC you can borrow, repay and borrow again up to a maximum, similar to a credit card, and HELOCs usually have adjustable rates, so the payment varies with the balance and the rate. If you already have a mortgage, either product is a second mortgage that you pay in addition to the first.

Both are secured by your home. The CFPB is direct about it: only consider a HELOC if you are confident you can keep up with the payments, because if you fall behind you could lose your home.

A $50,000 example: interest-only now, principal later

Assume a single $50,000 draw at the start, a constant hypothetical 8% rate, a five-year interest-only draw period and a fifteen-year repayment period, with no fees. Real HELOCs allow repeated draws and usually adjustable rates; this is a deliberate simplification.

The draw-phase payment is just the balance times the monthly rate: $50,000 × 8% ÷ 12 = $333.33. After five years you have paid $20,000 in interest and still owe all $50,000. The repayment payment comes from the standard loan formula, PMT = P × r ÷ [1 − (1 + r)^(−n)], applied to $50,000 over 180 months. The step up is $144.49 a month, about 43%, and it happens with the rate unchanged. Over the whole twenty years the example pays $56,008.69 in interest.

The CFPB notes that monthly payments are often significantly higher once the repayment period begins, and in some cases the whole balance can be due when it starts. The CFPB's own illustrations include a ten-year draw period and repayment over ten or twenty years, so the shape of the step depends on the product. Same balance, same 8% rate, three different structures:

A shorter repayment window means a bigger step. A longer draw period means more interest, because the balance is not being paid down.

To test your own balance, rate and periods, estimate draw and repayment payments in the HELOC calculator. Because payments scale with the balance, drawing only $20,000 of the same line would give payments of $133.33 and $191.13 under the first structure. The calculator assumes one full draw and no further borrowing.

Compare a fixed installment loan on its own schedule

The fixed-rate case of a home equity loan has a payment from month one that pays interest and principal together. At the same hypothetical 8% on $50,000:

The fifteen-year line is not a coincidence. It equals the HELOC's repayment payment, because once repayment starts the arithmetic is identical.

Be careful with the comparison. The fixed 10-year loan costs $606.64 a month, while the HELOC example costs $333.33 for five years and then $477.83. But the loan is finished after ten years and the HELOC example runs twenty, so the smaller starting payment is not evidence of a lower total cost. On equal twenty-year horizons at the same rate, the HELOC example pays $56,008.69 of interest against $50,372.81 for a 20-year fixed loan, which is $5,635.88 more, because the first five years leave the principal untouched. In practice the two products carry different rates, so a real comparison needs each offer's actual rate and fees, and this section uses one rate to isolate structure. When a payment horizon is unequal, compare the structure rather than naming a cost winner. The home equity loan calculator models the fixed-rate case, a lump sum with a level payment.

Stress-test a higher rate and the end of the draw period

Two things move a HELOC payment, and they are easy to confuse.

1. Principal starts. At a constant 8%, the payment rises from $333.33 to $477.83. All $144.49 of that comes from repaying principal.
2. The rate changes. Most HELOCs are adjustable, so the rate can move while you are in either phase.

Combine them. Suppose the rate is 8% during the draw period and 10% when repayment begins. The payment goes from $333.33 to $537.30, a rise of $203.97, or about 61%. Of that, $144.49 comes from principal starting and $59.48 from the higher rate.

Different constant rates, same structure, show how a rate change lifts both phases:

The dollar step shrinks as the rate rises, from $171.93 at 6% to $100.08 at 12%, because interest alone is already large in the draw phase, but every payment is higher. The CFPB adds that HELOC payments may change from month to month, and that converting some or all of a balance to a fixed rate, where a lender allows it, usually carries a higher rate than the variable one but is more predictable. The constant-rate tables above are scenarios, not a forecast of where rates will go.

Fees, capacity assumptions and questions for a lender

Fees. Lenders can charge fees when you open a HELOC, and the CFPB notes that some plans require a minimum draw or a minimum balance. The calculator lets you add closing costs, and an annual fee during the draw period if your plan has one. These raise the cost without raising the amount you borrow.

How much can you borrow? The CFPB describes available equity as the value of your home minus what you owe on your mortgage. The calculator's capacity tab applies a combined loan-to-value limit that you enter: with the example inputs of a $600,000 home, a $250,000 first mortgage and an 80% limit, the extra borrowing capacity is $230,000. That is arithmetic on assumptions, not an approval. Lenders also look at your finances and the home's value, and the CFPB warns that a lender may decide not to allow more credit if the home's value drops significantly or your circumstances change.

Questions to put to a lender in writing:

• Is the rate fixed or adjustable, and can part of the balance be converted to a fixed rate?
• How long is the draw period, and what is the payment structure in repayment?
• Is the full balance due at the end of the draw period in any circumstance?
• What fees apply, and are there minimum draws or annual fees?
• Under what conditions can the line be frozen or reduced?

Check your payment against your whole budget with the debt-to-income calculator before you borrow, and talk to a housing counselor if you are already struggling with your mortgage, as the CFPB suggests.

HELOC and home-equity-loan questions

Does a HELOC always have a variable rate?

Usually, but check. The CFPB says HELOCs usually have variable rates and that some let you convert part or all of the balance to a fixed rate. A home equity loan may have a fixed or an adjustable rate. Read the agreement for the rate type and any conversion option.

Why can a HELOC payment rise when the rate is unchanged?

Because the interest-only draw period ends and repayment of principal begins. In the $50,000 example at a constant 8%, the payment rises from $333.33 to $477.83 with no change in rate.

Does the HELOC calculator model several withdrawals?

No. It assumes one full draw at the start, a constant example rate and no further borrowing. Real lines let you draw and repay repeatedly and usually have adjustable rates, so treat the output as a scenario.

Does available equity guarantee approval?

No. The capacity tab applies the combined loan-to-value limit and the balances you enter. A lender decides its own limits and also considers your finances and the home's value.

Is the lower draw-period payment a cheaper loan?

Not necessarily. An interest-only payment leaves the principal untouched, so the total interest over the full life can be higher, as in the 20-year example above. Compare complete costs over equal horizons.

Sources

• Consumer Financial Protection Bureau, What is the difference between a Home Equity Loan and a Home Equity Line of Credit (HELOC)?: lump sum versus repeated draws; page last reviewed 28 August 2026. Accessed 27 October 2026.
• Consumer Financial Protection Bureau, What is a home equity line of credit (HELOC)?: draw and repayment periods, variable rates and the risk to your home; page last reviewed 28 August 2026. Accessed 27 October 2026.