Short answer
A HELOC commonly adds a separate home-secured line of credit while leaving the first mortgage in place. A cash-out refinance usually replaces the existing mortgage with a new, larger first mortgage. The right comparison depends on current mortgage terms, closing costs, rate structure, repayment period, and funding needs.
Side-by-side comparison
| Factor | HELOC | Cash-out refinance |
|---|---|---|
| First mortgage impact | Usually remains in place. | Usually replaced by a new mortgage. |
| Lien concept | Often a second lien, depending on existing loans. | New first mortgage after old loan is paid off. |
| Funding style | Flexible draws during draw period. | Lump sum at closing. |
| Rate/payment | Often variable; fixed features may exist. | Depends on new mortgage terms. |
| Best planning question | Do I want flexible access without replacing my first mortgage? | Am I comfortable resetting/replacing my first mortgage? |
Sources
Direct answer
A HELOC usually keeps the first mortgage in place and adds a separate home-secured line of credit. A cash-out refinance usually replaces the first mortgage with a larger new mortgage. The right comparison depends on current mortgage terms, costs, rate structure, and funding need.
Reviewed October 3, 2026. This page was materially reviewed for answer clarity, methodology, source support, and internal links. Comparison guidance now highlights first-mortgage impact and total-cost framing.
On this page
Cash-out refinance
A cash-out refinance usually replaces your existing mortgage with a new mortgage for a larger amount. If approved, the homeowner may receive cash back at closing after paying off the existing mortgage and costs.
HELOC
A HELOC is generally a separate line of credit secured by your property. It may let qualified homeowners draw funds over time during a draw period rather than replacing the first mortgage.
When replacing the mortgage matters
If your current mortgage has favorable terms, replacing it may not be attractive. If you want to keep the first mortgage in place, a HELOC may be worth comparing.
When flexibility matters
A HELOC may fit projects with uncertain or staged costs. A cash-out refinance may fit homeowners who want one new mortgage and one lump-sum amount.
Costs and rate structure
Compare closing costs, rate type, APR, repayment term, payment changes, and whether the new financing affects your current mortgage rate.
| Cost question | Why it changes the comparison |
|---|---|
| Will the first mortgage be replaced? | A cash-out refinance can change the rate and term on the entire mortgage balance. |
| How long will you keep the financing? | Upfront costs matter more when the payoff or refinance horizon is short. |
| Do you need funds all at once? | A HELOC may help staged costs; a refinance usually provides a lump sum. |
Long-term repayment impact
A cash-out refinance may reset the mortgage term, while a HELOC may add a separate payment. The best choice depends on total cost and budget fit.
How to compare
Consider whether you want to replace your first mortgage, how much flexibility you need, closing costs, rate type, and long-term repayment impact.
| Question | May point toward HELOC | May point toward cash-out refinance |
|---|---|---|
| Keep current mortgage? | You prefer not to replace it. | You are open to a new first mortgage. |
| Funding need? | Flexible or staged draws. | One larger lump sum. |
| Rate structure? | You can manage possible variable-rate risk. | You want one mortgage structure, depending on terms. |
Authoritative references
Frequently Asked Questions
Does a HELOC replace my mortgage?
Usually no. A HELOC is commonly separate from the first mortgage, though product structures vary.
Does a cash-out refinance replace my mortgage?
Usually yes. It commonly pays off and replaces the existing mortgage with a new one.
Which option is cheaper?
It depends on rates, fees, term, balance, current mortgage, and how long you keep the financing.