HELOC Repayment Phase Shock Calculator
One of the biggest risks of HELOCs is payment shock when the draw period ends. Our calculator helps you understand and prepare for this payment increase.
What Is Repayment Shock?
Repayment shock is the dramatic increase in monthly payments when your HELOC transitions from:
- Draw period: Interest-only (or minimal) payments
- Repayment period: Full principal + interest payments
Example of Payment Shock
Scenario: $50,000 HELOC at 8.5%
| Phase | Payment | Increase |
|---|---|---|
| Draw Period (10yr) | $354/month (interest-only) | - |
| Repayment Period (20yr) | $434/month | +$80 (+23%) |
| If balance unchanged | $434/month | +$80/month |
Worst case: If you made interest-only payments for 10 years, your payment jumps $80+ per month.
Factors That Affect Payment Shock
1. Remaining Balance
- Higher balance = larger payment increase
- Paying down principal during draw period helps
2. Interest Rate at Transition
- Rate could be higher in 10 years
- Our stress test shows +1% scenario
3. Repayment Term
- Typically 20 years
- Some lenders offer 10-25 years
How to Minimize Payment Shock
1. Pay Principal During Draw Period
Even $100/month extra makes a big difference:
- $50,000 balance, 8.5%, paying $500/month (vs $354)
- After 10 years: Balance drops to ~$9,000
- Repayment payment: ~$75/month (vs $434 at full balance)
2. Refinance Before Repayment Starts
- Convert to fixed-rate home equity loan
- Refinance into your first mortgage
- Pay off with savings
3. Plan for the Increase
- Know exactly when your draw period ends
- Budget for the higher payment
- Consider refinancing 6-12 months before transition
Our Calculator Shows Payment Shock
Our tool estimates:
- Your draw period payment
- Estimated repayment period payment
- Percentage increase to expect
- Total cost if you don’t pay down principal