Why can the HELOC payment jump?
HELOCs usually have adjustable rates. The draw-period payment may also be much lower than the later amortizing payment. Terra shows both instead of presenting the low early payment as the whole story.
Free Financial Calculator · Home equity
HELOC vs. Home-Equity Loan vs. No Loan
Compare the cost and payment structure of borrowing against your home — then stress-test the variable-rate risk before you decide whether borrowing belongs in the plan at all.
Reviewed · Sep 22, 2026
What this does
Models a HELOC with an interest-only draw period, a fixed-rate home-equity loan, and paying cash or saving first. It also tests HELOC rates +1, +2 and +3 percentage points.
Have ready
The amount you may need, loan quotes or rates to test, fees, terms, and — for debt consolidation — the APR and payment on the debt you may replace.
Terra approachCompare total costStress-test variable ratesKeep “don’t borrow” in the comparisonRead the decision guide →
Your assumptions
Use your own lender terms when you have them. The defaults are illustrative examples, not current offers or rate quotes.
HELOC assumptions
Model assumption: the full entered balance is outstanding throughout the draw period and the minimum modeled payment is interest-only. The repayment period then fully amortizes that balance. Actual HELOC draw rules, payment floors, rate caps and conversion options vary by lender.
Home-equity loan assumptions
No-loan alternative
Debt-consolidation check
This compares the entered debt balance with the same amount moved to home-secured borrowing. Lower interest does not remove the collateral risk.
Saved scenarios stay privately in this browser under My Terra. Nothing is saved unless you choose Save this scenario.
Variable-rate risk
HELOC stress test
Each scenario assumes the higher rate applies for the entire modeled draw and repayment periods. It is a stress test, not a forecast.
| Scenario | HELOC rate | Draw payment | Repayment payment | Interest + fees |
|---|
Financing cost above the amount borrowed
“No loan” does not model the opportunity cost of using cash, interest you might earn while saving, inflation, or changes in project cost.
How to read it
Useful math, with visible limits.
Why keep “no loan” in the model?
A loan comparison can make borrowing look inevitable. Terra keeps paying cash or saving first visible because sometimes the best comparison is not HELOC versus loan — it is borrow versus wait.
What is not modeled?
Rate caps, minimum draws, lender-specific payment floors, financed closing costs, home-value limits, credit underwriting, taxes, changing project costs and the opportunity cost of cash are outside this simplified model.
Primary-source context: The CFPB describes HELOCs as home-secured revolving credit, notes that HELOCs usually carry variable rates, and warns that borrowers who cannot repay can lose the home. It also notes that home-equity loans typically provide a lump sum and may carry fixed rates.
Educational scenario only. This calculator does not provide a lending recommendation or determine whether borrowing is appropriate for you. Actual lender terms, taxes, fees and repayment rules control. Borrowing against home equity puts the home behind the debt.