HELOC Payment Calculator
Draw Period Payment (interest only)
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Repayment Period Payment
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Total Interest (draw period)
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Total Interest (repayment)
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How HELOC Payments Work
A HELOC payment is the monthly amount a borrower owes on a Home Equity Line of Credit, and it changes dramatically depending on whether you are in the draw period or the repayment period. According to the Consumer Financial Protection Bureau (CFPB), a standard HELOC has a 5-to-10-year draw period followed by a 10-to-20-year repayment period. During the draw phase, most lenders require only interest payments, keeping costs low but not reducing the principal balance. Once repayment begins, the borrower pays both principal and interest in fixed installments.
The transition from draw to repayment is often called "payment shock" because monthly costs can increase 50-80% overnight. For a $50,000 balance at 8.5% APR, interest-only payments of $354/month jump to about $434/month over a 20-year repayment period. Understanding both phases is critical for long-term financial planning, especially when using a HELOC for home improvements or equity-based borrowing.
How HELOC Payments Are Calculated
HELOC payment calculations use two distinct formulas depending on the phase:
Draw Period (Interest-Only): Monthly Payment = Balance x (Annual Rate / 12)
Repayment Period (Amortizing): Monthly Payment = Balance x [r(1+r)^n] / [(1+r)^n - 1], where r = monthly rate and n = total repayment months.
- Balance — the outstanding HELOC amount at the start of repayment
- r — the monthly interest rate (annual rate divided by 12)
- n — total number of monthly payments in the repayment period
Worked example: A $50,000 HELOC at 8.5% APR with a 10-year draw period and 20-year repayment. Draw period payment: $50,000 x (0.085 / 12) = $354.17/month. Total draw-period interest: $354.17 x 120 months = $42,500. Repayment payment: $50,000 x [0.007083 x 1.007083^240] / [1.007083^240 - 1] = $434.42/month. Total repayment interest: ($434.42 x 240) - $50,000 = $54,260.80.
Key HELOC Payment Terms
- Draw Period — the initial 5-10 years when you can borrow, repay, and re-borrow funds up to your credit limit. Minimum payments are interest-only.
- Repayment Period — the 10-20 years after the draw period when you pay back both principal and interest. No further draws are allowed.
- Payment Shock — the significant increase in monthly payments when transitioning from interest-only to fully amortizing payments.
- Variable Rate — most HELOC rates adjust with the prime rate, meaning your payment changes when the Federal Reserve moves rates.
- Rate Cap — a contractual ceiling on how high your HELOC rate can go over its lifetime, typically prime + 6%.
Draw Period vs. Repayment Period Payments
The table below illustrates how payments change across different HELOC balances and terms, using the current average rate of 8.5% per Bankrate.
| HELOC Balance | Interest-Only (Draw) | Amortizing (10yr) | Amortizing (20yr) | Payment Increase |
|---|---|---|---|---|
| $25,000 | $177/mo | $310/mo | $217/mo | +23% to +75% |
| $50,000 | $354/mo | $620/mo | $434/mo | +23% to +75% |
| $75,000 | $531/mo | $930/mo | $651/mo | +23% to +75% |
| $100,000 | $708/mo | $1,240/mo | $868/mo | +23% to +75% |
Practical HELOC Payment Examples
Example 1 — Kitchen remodel: Jennifer borrows $60,000 on a HELOC at 9.0% for a kitchen renovation. During the 10-year draw period, she pays $450/month (interest only). Total draw-period interest: $54,000. When repayment begins over 15 years, her payment rises to $608/month. She could save $12,600 in total interest by making $100/month extra principal payments during the draw period. Use our amortization calculator to model extra payment scenarios.
Example 2 — Partial draw: David opens a $100,000 HELOC but draws only $30,000 initially for home repairs. His interest-only payment is $212.50/month at 8.5%. Six months later he draws another $20,000, raising his payment to $354.17/month. He repays $10,000 during the draw period, reducing his balance to $40,000 before the repayment phase begins.
Example 3 — Rate increase scenario: Maria has a $50,000 HELOC balance at prime + 1% (currently 9.5%). If the Fed raises rates by 1% over two years, her rate becomes 10.5%, increasing her interest-only payment from $396/month to $437.50/month. She monitors rate changes using the mortgage calculator to compare refinancing options.
Strategies to Manage HELOC Payments
- Make principal payments during the draw period: Even small extra payments reduce your balance and lower future repayment-period payments significantly.
- Convert to a fixed rate: Many lenders offer fixed-rate conversion options for all or part of your HELOC balance, locking in predictable payments before rates rise.
- Refinance before repayment begins: If rates have dropped or your credit has improved, refinancing the HELOC into a new credit line or mortgage refinance may lower your rate.
- Budget for the payment increase: Calculate your full amortizing payment now and set aside the difference between it and your interest-only payment each month.
- Avoid maxing out the credit line: Keeping utilization below 80% of your limit improves your credit score and provides a buffer for emergencies.
Current HELOC Rate Trends
As of early 2026, average HELOC rates in the United States range from 8.5% to 10.5%, according to Bankrate. The prime rate stands at 8.5%, with most HELOC products priced at prime + 0% to prime + 2% depending on creditworthiness. The Federal Reserve held rates steady through late 2025, and economists anticipate potential cuts in mid-to-late 2026 that could bring some relief to HELOC borrowers. Historically, HELOC rates have averaged between 5% and 9% over the past two decades, per Federal Reserve data.
Frequently Asked Questions
What is a HELOC and how does it differ from a home equity loan?
A Home Equity Line of Credit (HELOC) is a revolving credit line secured by your home that allows you to borrow, repay, and re-borrow during the draw period, typically 5-10 years. Unlike a home equity loan, which provides a one-time lump sum at a fixed rate, a HELOC has a variable rate and charges interest only on the amount you have actually drawn. The CFPB reports that approximately 60% of equity borrowers choose HELOCs for their flexibility, particularly for ongoing projects like home renovations where costs emerge over time.
What is the draw period and how long does it last?
The draw period is the initial phase of a HELOC, lasting 5 to 10 years depending on your lender's terms. During this time, you can access funds up to your credit limit, repay them, and draw again as needed. Minimum monthly payments are typically interest-only, which keeps costs low but does not reduce the principal. For example, on a $50,000 balance at 8.5%, your draw-period payment is only $354/month. Some lenders allow you to make voluntary principal payments during this phase, which reduces your balance and lowers future repayment costs.
Why do HELOC payments increase after the draw period?
HELOC payments increase because the loan transitions from interest-only to fully amortizing payments that include both principal and interest. During the draw period, a $50,000 balance at 8.5% costs $354/month. When the 20-year repayment period begins, the same balance requires $434/month, a 23% increase. If your repayment period is only 10 years, payments jump to $620/month, a 75% increase. This "payment shock" catches many borrowers off guard, so financial advisors recommend calculating repayment costs before drawing funds.
Are HELOC interest rates fixed or variable?
Most HELOCs carry variable interest rates tied to the prime rate, which is set by major banks based on the Federal Reserve's federal funds rate. As of early 2026, the prime rate is 8.5%, and typical HELOC rates range from 8.5% to 10.5% depending on the borrower's margin. Some lenders offer fixed-rate conversion options that let you lock in a rate on all or part of your outstanding balance, providing payment predictability. However, fixed-rate HELOCs generally carry slightly higher rates than the initial variable rate.
How can I reduce the total interest paid on my HELOC?
The most effective strategy is making voluntary principal payments during the draw period, even when only interest is required. Paying an extra $200/month on a $50,000 balance at 8.5% during a 10-year draw period reduces the remaining balance by approximately $24,000, saving over $30,000 in total interest across the life of the HELOC. Other strategies include converting to a fixed rate when variable rates are rising, refinancing into a lower-rate product if your credit improves, and paying off the HELOC with a cash-out refinance if your first mortgage rate is lower.
What happens if I cannot make my HELOC payments?
Because a HELOC is secured by your home, defaulting on payments can lead to foreclosure. If you are struggling, contact your lender immediately to discuss options such as a loan modification, temporary forbearance, or converting the balance to a fixed-rate term loan with lower payments. The CFPB recommends reaching out before missing a payment, as lenders are generally more willing to work with proactive borrowers. Late payments also damage your credit score, typically dropping it 60-110 points for the first missed payment, according to FICO.