Second Lien vs. First Lien: What’s the Difference?
The lien position matters—a lot. Here’s what second lien (HELOC) vs. first lien (cash-out refinance) means for you.
TL;DR: Second lien (HELOC) keeps your first mortgage intact with low closing costs (~$750) but higher rates. First lien (cash-out refinance) replaces your mortgage with lower rates but higher closing costs ($10,000+) and term reset. Choose second lien to preserve a low first mortgage rate; choose first lien for the lowest overall rate on large amounts.
What Is Lien Position?
First lien: Primary mortgage - gets paid first if home is sold Second lien: HELOC or home equity loan - gets paid after first mortgage
Comparison Table
| Factor | First Lien (Refinance) | Second Lien (HELOC) |
|---|---|---|
| Position | #1 in line | #2 in line |
| Closing Costs | High ($10k+) | Low (~$750) |
| Rate | Lower | Higher |
| Risk to Lender | Lower | Higher |
| Keeps First Mortgage | No | Yes |
Why Second Liens Cost More
Second lien lenders take more risk:
- If home sells, first mortgage gets paid first
- Second lien might not get fully repaid
- Higher risk = higher rate
Typical rate spread: 1-2% higher than first mortgage
When Each Makes Sense
First Lien (Cash-Out Refinance):
- You want lowest possible rate
- Large borrowing amount ($75k+)
- Staying in home 10+ years
- Refinance rate is competitive
Second Lien (HELOC):
- You love your first mortgage rate
- Need flexibility (ongoing access)
- Might move within 5 years
- Smaller borrowing amount
Combined LTV Limits
Lenders care about combined loan-to-value (CLTV):
| Loan Type | Max CLTV |
|---|---|
| First lien only | 80-97% |
| Second lien (under 80% CLTV) | Easier approval |
| Second lien (80-85% CLTV) | Harder but possible |
| Second lien (85%+ CLTV) | Very difficult |
Example:
- Home: $400,000
- First mortgage: $280,000 (70% LTV)
- HELOC available: Up to $40,000 (to reach 80% CLTV)
Our Calculator Considers Both
We show:
- HELOC (second lien) payment and costs
- Cash-out refinance (first lien) payment and costs
- Total cost comparison over 10 years
- Which wins based on your timeline
The “Subordination” Option
Can you keep first mortgage AND add a second lien?
Yes, through subordination:
- First lender agrees to remain in first position
- HELOC becomes second lien
- Requires first lender approval
- Depends on your LTV and payment history
Frequently Asked Questions
What’s the difference between first and second lien?
A first lien (primary mortgage) gets paid first if the home is sold. A second lien (HELOC or home equity loan) gets paid after the first mortgage. Second liens have higher rates because lenders take more risk—they’re second in line for repayment.
Why are HELOC rates higher than first mortgage rates?
HELOCs are second liens, meaning if the home is foreclosed, the first mortgage gets paid first. HELOC lenders may not recover their full investment, so they charge 1-2% more than first mortgage rates to compensate for this risk.
Should I choose HELOC or cash-out refinance based on lien position?
Choose HELOC (second lien) if you have a low first mortgage rate you want to keep. Choose cash-out refinance (first lien) if you want the lowest possible rate and don’t mind replacing your current mortgage. Use our calculator to compare total costs.