Equity Line of Credit Payments Calculator
See your HELOC payment under both phases: the low interest-only payment during the draw period, and the higher principal-and-interest payment when the repayment period kicks in. Plan ahead for the transition.
A Home Equity Line of Credit (HELOC) has two phases that produce dramatically different payments. During the draw period (typically 10 years), the minimum payment is just the monthly interest — often $50–$300 on a typical balance. When the repayment period begins (typically 20 years), the lender amortizes the remaining balance into principal-and-interest payments — often 2–3× the draw-period figure. With the average HELOC APR at 9.18% in January 2026 (Federal Reserve H.15) and Q4 2025 outstanding HELOC balances at $311 billion (Fed G.19, March 2026 release), payment-shock at the draw-to-repayment transition has become a material risk for many homeowners.
bolt Quick Answer
An equity line of credit payments calculator computes both your current draw-period (interest-only) payment and your projected repayment-period (amortizing) payment. Draw payment = balance × APR ÷ 12. Repayment-period payment uses the standard amortization formula M = P × r × (1+r)N / ((1+r)N−1) over the remaining repayment term. On a $50,000 balance at 9% APR, the draw-period payment is $375/month. When repayment begins over 20 years, the payment jumps to $450/month — a 20% increase. With a 10-year repayment term, the jump is much larger: $633/month, nearly double.
tips_and_updates Key Takeaways
- check_circle Draw period (typically 10 years) requires only interest — but principal never decreases.
- check_circle Repayment period (10–20 years) amortizes the remaining balance — payments often double or triple.
- check_circle Most HELOCs are variable-rate — payment moves with prime rate (currently 7.50%, Fed January 2026).
- check_circle Some HELOCs offer a "convert to fixed" option that locks part of the balance into a fixed rate sub-loan.
- check_circle Plan for the transition 12–24 months ahead — refinance into a fixed-rate home equity loan if payment shock would strain budget.
Estimate Your HELOC Payments — Both Phases
Adjust balance, APR, and the repayment-period term to see your draw-period and repayment-period payments side by side.
Draw-Period Payment (Interest Only)
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Why Plan Around the HELOC Transition
Payment Shock Is Real
Average HELOC payment doubles or triples at the draw-to-repayment transition. Borrowers who haven't planned often refinance under pressure — at whatever rate is available.
Variable-Rate Risk
Most HELOCs reset monthly to prime + margin. The Fed's prime rate moves; your payment can move with it. Modeling future scenarios is the only defense.
Calculate Privately
All math runs locally. Test scenarios, stress-test rate hikes — nothing transmitted, no soft pull, no hard pull.
How HELOC Payments Work in Two Phases
A HELOC is structured as a revolving credit line secured by your home equity. The loan agreement defines two distinct phases. During the draw period — typically the first 10 years — you can borrow up to your credit limit, pay it down, and re-borrow as needed. The minimum monthly payment during this phase is just the interest on the outstanding balance, computed as balance × APR ÷ 12. Principal is optional. Many borrowers pay only the minimum, treating the line like a long-term emergency fund or a cheap-ish source of short-term capital.
When the draw period ends, the line shifts into the repayment period — typically 10 to 20 years. New draws are no longer permitted, and the outstanding balance is amortized into fixed principal-and-interest payments using the standard formula. This is when payment shock hits. A $50,000 balance paying $375/month interest-only suddenly requires $450/month over 20 years (or $633/month over 10 years) — a 20–70% jump even before any rate hikes.
By the Numbers
Per Federal Reserve Consumer Credit G.19 (released March 2026), US households held $311 billion in HELOC balances at end-Q4 2025 — up $14B YoY as homeowners tapped record home equity. The CFPB estimates roughly 12% of HELOC borrowers will hit the draw-to-repayment transition by 2028. Payment shock is now a material policy concern.
Sample Payment Shock Scenarios
The table below shows draw-period and repayment-period payments for common HELOC balance levels at 9% APR. The shock is largest for shorter repayment terms — a 10-year repayment doubles the monthly payment, while a 20-year repayment is closer to a 20% jump.
| Balance | Draw Payment (IO) | 20-yr Repay Payment | 10-yr Repay Payment |
|---|---|---|---|
| $25,000 | $ 188 | $ 225 | $ 317 |
| $50,000 | $ 375 | $ 450 | $ 633 |
| $75,000 | $ 563 | $ 675 | $ 950 |
| $100,000 | $ 750 | $ 900 | $1,267 |
| $150,000 | $1,125 | $1,350 | $1,900 |
Calculations at 9.00% APR. Draw-period payment = balance × APR ÷ 12 (interest only). Repayment-period payment uses standard amortization over the stated term.
Four Strategies to Avoid Payment Shock
- chevron_right Pay principal during the draw period. The lender's required minimum is interest-only, but you can pay more. Even $50/month extra cuts your eventual repayment-period balance and the resulting payment shock.
- chevron_right Refinance to a fixed-rate home equity loan. Convert the variable-rate revolving balance into a fixed-rate, fixed-term loan. Locks in payment, eliminates rate risk, and starts amortization immediately.
- chevron_right Use a built-in fixed-rate option. Many HELOC products (Bank of America, Wells Fargo, US Bank, regional credit unions) let you lock portions of the balance into fixed-rate sub-loans within the line — keeping the unused capacity revolving while the converted portion amortizes.
- chevron_right Renegotiate at the transition. Some lenders extend the draw period or modify terms if payment shock would cause hardship. Less reliable than the other options but worth asking before defaulting.
Variable-Rate Math: How Prime Rate Moves Your Payment
Most HELOCs are priced at prime + margin, where prime is the Wall Street Journal Prime Rate (7.50% as of January 2026 per the Federal Reserve H.15 release) and margin is the lender's spread (typically 0.5%–3.0%). When the Federal Open Market Committee raises or cuts the federal funds rate, prime usually moves in lockstep within days. A 0.25% Fed hike on a $50,000 HELOC adds about $10/month to the interest-only payment and roughly $7/month to a 20-year repayment payment.
The implication: if you expect rates to rise, the variable-rate HELOC becomes more expensive month-by-month. The fixed-rate refinance option becomes more attractive in rising-rate environments. Conversely, in a falling-rate environment, holding the variable HELOC and paying more principal can be the optimal strategy. Use the calculator above to model 1- and 2-percentage-point rate hikes against your current balance.
Equity Line of Credit Payments FAQs
What is the minimum payment on a HELOC during the draw period? expand_more
During the draw period (typically the first 10 years), most HELOCs require only the monthly interest charge — calculated as balance × APR ÷ 12. On a $50,000 balance at 9% APR, that's $375/month. Some lenders require a small principal portion (1–2% of balance), but interest-only is the most common minimum. Principal payment is optional, which is why HELOCs are popular for short-term cash flow but dangerous as long-term debt.
What happens when my HELOC draw period ends? expand_more
The line transitions into the repayment period — typically 10 or 20 years. New draws are no longer permitted (you can't borrow more), and the outstanding balance is converted into amortizing principal-and-interest payments. The minimum payment usually rises 20–100% depending on remaining balance and repayment term. Many borrowers refinance into a fixed-rate home equity loan or sell the home before the transition to avoid payment shock.
Can I extend my HELOC draw period? expand_more
Sometimes — it depends on the lender. Some banks offer a "draw period extension" for an additional 5–10 years upon request, often with a small fee and re-underwriting (income, credit, home value). Other lenders do not extend. If extension isn't available, your options are to (1) refinance into a new HELOC, (2) refinance into a fixed-rate home-equity loan, or (3) accept the transition to repayment payments.
How much does a Fed rate hike change my HELOC payment? expand_more
Most HELOCs reset monthly to prime + margin. A 0.25% Fed funds rate hike typically translates to a 0.25% increase in prime within days. On a $50,000 balance, that's about $10/month more in interest-only payment, or about $7/month more on a 20-year repayment payment. Over the average 5–7 year HELOC holding period, accumulated rate hikes (or cuts) can swing total interest by thousands of dollars.
Should I pay extra principal on my HELOC during the draw period? expand_more
Almost always yes if cash flow allows. Three benefits: (1) you reduce the balance that will eventually amortize, lowering future repayment-period payment shock; (2) every dollar of principal stops accruing interest from that month forward; (3) you build available credit room for future emergencies. The lender may require you to specify "principal only" — verify on your statement that the extra was applied as principal, not as next month's interest.
Can I convert my HELOC balance to a fixed rate? expand_more
Many lenders offer an in-product fixed-rate conversion — Bank of America, Wells Fargo, US Bank, PNC, and most credit unions all support it. You select a portion of the outstanding balance, lock it at a fixed rate for a fixed term (often 5–20 years), and continue using the remaining unused credit as a revolving line. The fixed sub-loan amortizes alongside the variable portion. Compare the conversion fixed rate to a full HELOC refinance — sometimes refinancing produces a lower rate, sometimes the in-product option is cheaper.
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