Home Equity Line of Credit Calculator
Estimate your HELOC payments during both draw and repayment periods
Payment Summary
Draw Period
Repayment Period
Payment Schedule
Amortization Summary
| Period | Monthly Payment | Total Payments | Principal Paid | Interest Paid |
|---|
Ready to Calculate
Enter your HELOC details and click "Calculate HELOC Payments" to see your estimated payments and amortization schedule.
About Home Equity Lines of Credit
A Home Equity Line of Credit (HELOC) is a revolving credit line secured by your home's equity. Unlike a traditional home equity loan, a HELOC allows you to borrow only what you need, when you need it, during the draw period.
Draw Period: During the draw period (typically 5-10 years), you can borrow from your credit line as needed, and you'll usually make interest-only payments on the amount you've borrowed.
Repayment Period: After the draw period ends, you enter the repayment period (typically 10-20 years), during which you can no longer borrow funds and must repay both principal and interest.
Note: This calculator provides estimates based on the information you enter. Actual HELOC terms may vary by lender. The calculator assumes you borrow the full amount at the beginning of the draw period and make interest-only payments during the draw period.
Free HELOC Payment Calculator — Estimate Draw & Repayment Period Payments Instantly
A Home Equity Line of Credit is one of the more structurally unusual borrowing products most homeowners encounter — and that unusual structure is exactly where financial planning tends to go wrong. During the draw period, payments are low because you’re only covering interest. When the repayment period begins, the full principal suddenly enters the equation and the monthly obligation can jump sharply. Most borrowers understand this in general terms but haven’t seen the actual numbers for their specific situation. Bluxe’s free HELOC payment calculator shows both periods clearly. Enter your loan amount, interest rate, draw period, and repayment period, and you get the draw-period monthly payment, repayment-period monthly payment, total interest, total cost, and a full amortisation summary — before you sign anything. No sign-up required.
What Is a HELOC?
A Home Equity Line of Credit is a revolving credit facility secured against the equity in your home — the difference between your property’s current market value and the outstanding balance on your mortgage. Unlike a home equity loan, which delivers a fixed lump sum repaid over a set schedule, a HELOC works like a credit card with your home as collateral: you draw what you need, when you need it, up to an approved credit limit, and interest accrues only on what’s actually outstanding.
The two-phase structure is what makes HELOC planning genuinely different from standard loan planning. The draw period — typically five to ten years — allows you to borrow and repay repeatedly, with minimum payments usually covering interest only on the outstanding balance. The repayment period that follows — typically ten to twenty years — closes the credit line and converts the outstanding balance into a fully amortising loan, repaid through principal-plus-interest payments on a fixed schedule. The transition between these two phases produces the payment increase that catches many borrowers unprepared.
How Does This Calculator Work?
The HELOC calculator models both phases sequentially using standard financial formulas, assuming the full approved amount is drawn at the start of the draw period and that interest-only payments are made throughout.
Draw Period Payment Formula
Draw Period Monthly Payment = Loan Amount × (Annual Rate / 12 / 100)
This is pure interest — no principal reduction occurs during the draw period under the interest-only assumption.
Repayment Period Payment Formula
The outstanding balance at the end of the draw period becomes the principal for a standard amortising loan:
Repayment Monthly Payment = P × r / [1 − (1 + r)^(−n)]
Where:
- P = Full loan amount (outstanding at end of draw period)
- r = Monthly interest rate (Annual rate ÷ 12 ÷ 100)
- n = Repayment period in months (Years × 12)
Total Interest Calculation
Total Interest = (Draw Period Monthly Payment × Draw Months) + (Repayment Monthly Payment × Repayment Months) − Loan Amount
Worked Example
Loan amount: $100,000 | Annual rate: 7.5% | Draw period: 10 years | Repayment period: 20 years
Draw Period Monthly Payment: = $100,000 × (7.5 / 12 / 100) = $100,000 × 0.00625 = $625.00 per month
Repayment Period Monthly Payment: r = 0.075 / 12 = 0.00625, n = 20 × 12 = 240 = $100,000 × 0.00625 / [1 − (1.00625)^(−240)] = $625 / [1 − 0.2232] = $625 / 0.7768 ≈ $804.68 per month
Total paid during draw = $625 × 120 = $75,000 Total paid during repayment = $804.68 × 240 = $193,123 Total cost = $75,000 + $193,123 = $268,123 Total interest = $268,123 − $100,000 = $168,123
The payment increase at the transition point — from $625 to $804.68 — is $179.68 per month. Seeing that figure before drawing on the line is far more useful than encountering it on a statement.
HELOC Payment Reference Table
| Loan Amount | Rate | Draw Period | Repayment Period | Draw Payment | Repayment Payment | Total Interest |
|---|---|---|---|---|---|---|
| $50,000 | 7% | 5 years | 10 years | $291.67 | $580.54 | $34,865 |
| $75,000 | 7.5% | 10 years | 15 years | $468.75 | $694.58 | $124,074 |
| $100,000 | 7.5% | 10 years | 20 years | $625.00 | $804.68 | $168,123 |
| $150,000 | 8% | 10 years | 20 years | $1,000.00 | $1,254.66 | $261,118 |
| $200,000 | 8.5% | 5 years | 20 years | $1,416.67 | $1,737.25 | $416,740 |
The final row illustrates how a shorter draw period on a large HELOC concentrates the interest into the repayment phase — $200,000 at 8.5% over a combined 25 years generates over $416,000 in total interest, more than double the original principal.
How to Use the Calculator on Bluxe
- Open the free HELOC payment calculator on Bluxe — no account, no login, and the full amortisation summary is available immediately after calculation.
- Enter the loan amount — the total credit limit approved on your HELOC, or the amount you intend to draw if you don’t plan to use the full line.
- Input the annual interest rate as quoted by your lender; most HELOCs carry a variable rate tied to the prime rate, so use the current rate for today’s payment estimate and rerun the calculation if the rate changes.
- Set the draw period in years — confirm this against your HELOC agreement, as terms vary by lender between five and ten years in most cases.
- Enter the repayment period in years — typically ten to twenty years, again confirmed against your specific agreement.
- Click Calculate HELOC Payments — draw period payment, repayment period payment, total interest, total cost, and the full amortisation summary appear immediately.
Practical tip: run the calculation at two different interest rates — your current rate and your current rate plus 2% — to model the payment impact of a rate increase during the draw period. Since most HELOCs are variable-rate products, stress-testing against a moderate rate increase before drawing is a straightforward step that many borrowers skip.
Understanding Your Results
Four summary figures appear before the amortisation table: draw period monthly payment, repayment period monthly payment, total interest, and total cost. The draw period payment is your near-term monthly obligation — what you’re committing to paying while the line is available. The repayment period payment is the future obligation that begins when the draw period ends — and the gap between the two is the payment shock to plan for. Total interest is the full cost of the credit above principal. Total cost adds both together into the complete repayment figure.
HELOC Payment Shock Assessment Guide
| Repayment Payment ÷ Draw Payment | Payment Increase | Planning Priority |
|---|---|---|
| Below 1.5x | Modest increase | Standard budget adjustment |
| 1.5x – 2x | Significant increase | Plan draw-period savings to absorb |
| 2x – 3x | Substantial increase | Reassess draw amount or repayment term |
| Above 3x | Severe increase | Review HELOC structure with lender |
A repayment payment more than twice the draw payment warrants careful cash flow planning — particularly if your income or expenses are likely to change in the years between now and the repayment phase start.
Why This Matters
HELOC payment shock — the sudden increase in monthly obligation when the repayment period begins — is one of the more predictable and yet consistently underestimated financial transitions in homeowner borrowing. The low interest-only draw payments create a comfort level that the much higher repayment payments then disrupt, often arriving at a point in life when other financial pressures may also be increasing. Modelling both numbers at the outset, before the line is activated, is simply good planning — and it takes less than a minute with this calculator.
HELOCs have also become more broadly relevant as home equity has increased significantly for owners who purchased or refinanced at lower mortgage rates. Many homeowners are sitting on substantial equity that a HELOC could access for renovations, education costs, or debt consolidation. Whether that access makes financial sense depends heavily on the total cost calculation — which this tool provides immediately, before any commitment is made.
Practical Tips
Model rate increases before drawing Most HELOCs are tied to the prime rate and adjust with it. The rate you receive an approval at today may not be the rate you’re paying in years three or seven of the draw period. Running the calculator at your current rate and at that rate plus 1.5% to 2% shows the payment range you may need to accommodate — both during the draw period and at the repayment transition.
Consider paying principal during the draw period The calculator assumes interest-only draw period payments — which is the minimum required by most lenders. Making voluntary principal payments during the draw period reduces the balance that enters the repayment phase, directly lowering the repayment monthly obligation. Even modest principal contributions during the draw period can meaningfully reduce the payment shock at transition.
Use the amortisation table to plan the transition The amortisation summary shows the outstanding balance at the end of the draw period — which is the exact figure that gets amortised over the repayment term. If that balance looks higher than your future budget can comfortably service, the time to address it is now, by drawing less or paying down principal, not at the repayment start date.
Compare HELOC total cost against a home equity loan A home equity loan provides a fixed lump sum at a fixed rate with a fixed repayment schedule from day one — no draw period, no payment shock, but also no revolving flexibility. If you know approximately how much you need and when, running the total cost of a fixed home equity loan against the HELOC total cost from this calculator gives you a straightforward basis for choosing between the two products.
Who Should Use This Calculator?
Any homeowner considering or currently holding a HELOC who wants payment clarity across both phases of the product will find this tool directly applicable:
- Homeowners evaluating a HELOC application who want to see the full payment picture — both draw and repayment period — before approving the credit line activation
- Existing HELOC holders approaching the end of their draw period who want to calculate the exact repayment payment they’ll face starting in the next billing cycle
- Homeowners comparing a HELOC against a home equity loan or cash-out refinance who need the total interest and total cost figure for each option to make a fair comparison
- Financial advisors modelling HELOC scenarios for clients who want a fast, formula-accurate payment and amortisation tool without building a spreadsheet from scratch
- Anyone using a HELOC for a specific large expense — a renovation, tuition, or debt consolidation — who wants to verify the total cost of that borrowing decision before committing
If you found this helpful, you might also want to try Bluxe’s [Loan Repayment Calculator] to model a standard fixed-term loan repayment schedule — useful for comparing the HELOC’s two-phase structure against a conventional loan’s straightforward single-phase approach.
A Note Before You Go
The payment estimates and amortisation figures this calculator produces assume the full loan amount is drawn at the start of the draw period and that interest-only minimum payments are made throughout that phase. Actual HELOC payment obligations depend on your drawn balance at any given time, your lender’s specific payment terms, applicable rate adjustments, and any fees embedded in the agreement. Use these figures as an accurate structural planning baseline — and review your specific HELOC agreement carefully for the terms that govern your actual payment obligations.