Direct answer
A HELOC payment may increase when it moves from an interest-only example to principal-and-interest repayment. The increase depends on balance, rate, repayment term, and lender rules.
Published and reviewed October 3, 2026. This calculator is educational only. Borrow Home Equity is not a lender.
Calculator
Interest-only example: $333.33
Repayment example: $606.64
Dollar difference: $273.31
Percentage difference: 82.0%
Crawlable examples
| Balance | Rate | Term | Interest-only | Repayment | Total interest / difference |
|---|---|---|---|---|---|
| $25,000 | 8% | 120 months | $166.67 | $303.32 | $136.65 |
| $50,000 | 8% | 120 months | $333.33 | $606.64 | $273.30 |
| $75,000 | 8.5% | 180 months | $531.25 | $738.55 | $207.30 |
| $100,000 | 9% | 180 months | $750.00 | $1,014.27 | $264.27 |
| $50,000 | 0% | 120 months | $0.00 | $416.67 | $416.67 |
Methodology and assumptions
Interest-only estimate = balance x annual rate / 12. Repayment estimates use standard amortization over the selected term. The zero-rate repayment case uses balance divided by term months.
Limitations
These tools exclude fees, APR differences, daily accrual differences, future draws, rate changes, minimum payment rules, balloon features, taxes, insurance, and lender-specific requirements.
Sources
Frequently Asked Questions
Is this calculator a loan offer?
No. It is an educational calculator only and does not guarantee approval, rates, terms, or available funds.
Do actual HELOC payments vary?
Yes. Actual HELOC payment rules, fees, APR, rate changes, and repayment terms vary by lender and agreement.
Is Borrow Home Equity a lender?
No. Borrow Home Equity is not a lender and does not set rates or make credit decisions.