A home equity line of credit (HELOC) can give homeowners flexible access to money by allowing them to borrow against the equity in their home. Unlike a traditional home equity loan, a HELOC is generally a revolving credit line, which means you may be able to borrow, repay, and borrow again during the draw period, subject to the lender's terms.
This HELOC Payment Calculator estimates your monthly HELOC payment, available credit after a new draw, combined loan-to-value (CLTV), draw-period interest, repayment-period payment, total interest, total modeled payments, and an estimated repayment amortization schedule.
Enter your current HELOC balance, credit limit, additional amount assumed drawn now, interest rate, draw period, and repayment period. The calculator assumes the additional draw is available and taken immediately, the entered interest rate remains unchanged, and no further borrowing occurs during the modeled period.
Actual HELOC payments and costs can differ because lenders may use variable rates, daily interest calculations, different minimum-payment formulas, fees, payment caps, and other terms.
HELOC Payment Calculator
Estimate your HELOC payment, available credit, combined LTV, total interest, and repayment schedule using your current balance, credit limit, assumed new draw, interest rate, and loan periods.
HELOC Information
HELOC Payment Results
Important: This calculator assumes that the additional draw is taken immediately, the entered interest rate remains constant, the modeled balance does not receive additional draws, and the selected payment structure remains unchanged. Actual HELOC payments may differ because lenders can use variable rates, daily balance calculations, lender-specific minimum-payment formulas, fees, and other terms.
How to Read Your Results
Estimated Repayment Amortization
| Year | Starting Balance | Principal Paid | Interest Paid | Ending Balance |
|---|
What Is a HELOC?
A home equity line of credit, or HELOC, is a revolving credit line secured by a home. It can allow a homeowner to access money based on available credit and the lender's requirements.
Unlike a traditional home equity loan, which generally provides a specific amount of money upfront, a HELOC can allow the borrower to draw funds as needed during an available draw period.
The exact structure of a HELOC varies by lender. Interest rates, credit limits, payment requirements, draw periods, repayment periods, fees, and other terms are determined by the credit agreement.
How a HELOC Works
A HELOC commonly has two main stages: a draw period and a repayment period.
Draw Period
During the draw period, the borrower may generally access available credit up to the approved credit limit, subject to the lender's rules.
Depending on the HELOC agreement, payments during this period may be based primarily on interest, or they may include principal and interest.
This calculator lets you model either an interest-only draw-period payment or a principal-and-interest payment.
Repayment Period
When the draw period ends, the HELOC generally moves into its repayment phase according to the loan agreement. New borrowing may no longer be available, and payments can increase because principal repayment may become required.
This calculator estimates the repayment payment by amortizing the modeled balance remaining at the end of the draw period over the selected repayment term.
How the HELOC Payment Calculator Works
1. Current HELOC Balance
This is the amount you currently owe on your HELOC.
2. HELOC Credit Limit
The credit limit is the maximum amount of credit available under the HELOC agreement, subject to its terms.
The calculator uses the credit limit to determine how much credit would remain after the additional amount assumed drawn now.
Available Credit After Draw = Credit Limit − Current Balance − Additional Draw
3. Additional Amount Assumed Drawn Now
This input represents an additional amount that the calculator assumes is borrowed immediately.
This distinction is important. If you plan to borrow money months or years in the future, the calculator does not model the timing of that future draw. It treats the entered amount as though it becomes part of the balance immediately.
4. Total HELOC Balance
The modeled balance is calculated as:
Total HELOC Balance = Current HELOC Balance + Additional Draw
5. Estimated Home Equity
For the basic calculation, estimated home equity is:
Home Equity = Home Value − Mortgage Balance
The calculator does not subtract the HELOC from this result because it separately calculates the combined debt and CLTV after the new draw.
6. Combined Loan-to-Value
Combined loan-to-value, or CLTV, compares the total mortgage and HELOC debt with the estimated value of the property.
CLTV = (Mortgage Balance + HELOC Balance) ÷ Home Value × 100
A higher CLTV means a larger percentage of the home's estimated value is represented by secured debt.
7. Draw-Period Payment
For an interest-only estimate, the calculator uses:
Monthly Interest = HELOC Balance × Annual Interest Rate ÷ 12
This simplified calculation does not reduce the principal balance.
For the principal-and-interest option, the calculator uses a standard amortization formula over the selected draw period.
8. Repayment-Period Payment
The repayment payment is calculated using the balance remaining after the modeled draw period and the selected repayment term.
The standard fixed-payment formula used for the amortizing estimate is:
M = P × [r(1 + r)n] ÷ [(1 + r)n − 1]
- M = estimated monthly payment
- P = principal balance
- r = monthly interest rate
- n = total number of monthly payments
If the interest rate is 0%, the calculator divides the balance evenly over the number of payments.
HELOC Payment Example
Consider a homeowner with the following figures:
- Current HELOC balance: $50,000
- HELOC credit limit: $100,000
- Additional amount assumed drawn now: $25,000
- Interest rate: 8%
- Home value: $400,000
- Mortgage balance: $250,000
- Draw period: 10 years
- Repayment period: 15 years
The modeled HELOC balance would be $75,000 after the assumed immediate draw.
The remaining credit would be:
$100,000 − $50,000 − $25,000 = $25,000
The home equity estimate would be $150,000, based on a $400,000 home value and $250,000 mortgage balance.
Total secured debt after the HELOC draw would be $325,000, producing an estimated CLTV of 81.25%.
The calculator then estimates the draw-period payment and repayment-period payment based on the selected payment structure and constant-rate assumption.
Why HELOC Payments Can Change
A major consideration with many HELOCs is that the interest rate can be variable. If the rate changes, the amount of interest charged on the outstanding balance can also change.
For example, a payment calculated using an 8% rate may not remain the same if the actual HELOC rate later increases to a higher rate.
Payments can also change when the draw period ends and the HELOC enters the repayment phase.
HELOC Credit Limit and Available Credit
Your HELOC credit limit is different from the amount you currently owe.
For example, if your credit limit is $100,000 and your current balance is $50,000, you may have $50,000 of unused credit before considering any additional draw, assuming the lender's terms permit it.
If you then assume a $25,000 immediate draw, the calculator estimates:
$100,000 − $50,000 − $25,000 = $25,000 available credit
The available-credit calculation is purely mathematical. It does not determine whether the lender will permit a particular draw.
HELOC Draw Period vs. Repayment Period
| Feature | Draw Period | Repayment Period |
|---|---|---|
| Borrowing | May be available under the credit agreement | May no longer be available |
| Principal Payments | Depend on HELOC terms | Generally required |
| Interest | Charged on outstanding balance | Charged on outstanding balance |
| Payment | May be interest-only or include principal | Generally includes principal repayment |
These are general descriptions rather than universal rules. Your actual HELOC agreement controls how your credit line operates.
HELOC Interest-Only Payment Example
Suppose the modeled HELOC balance is $75,000 and the assumed annual interest rate is 8%.
A simplified monthly interest-only estimate is:
$75,000 × 8% ÷ 12 = $500 per month
This calculation assumes the entire $75,000 balance remains outstanding and the rate stays at 8%.
Actual HELOC interest may be calculated using the lender's specific daily balance method, and the actual payment can change as the balance or interest rate changes.
What Happens When the Draw Period Ends?
When the draw period ends, the HELOC may move into its repayment phase. Depending on the agreement, you may no longer be able to make new draws from the credit line.
Payments can also become higher because principal repayment may be required instead of an interest-only payment structure.
This is one reason borrowers should consider the potential repayment-period payment before using a large portion of their available HELOC credit.
HELOC Costs Beyond the Payment
The payment shown by this calculator does not represent every possible cost associated with a HELOC.
Depending on the lender and credit agreement, additional costs may include application or origination fees, appraisal expenses, title-related charges, annual fees, transaction fees, closing costs, or other charges.
A HELOC with a lower interest rate may not necessarily have the lowest overall cost if it includes higher fees or other charges.
Before accepting a HELOC, compare the interest rate, payment structure, fees, rate-adjustment rules, credit limit, draw period, repayment period, and other terms.
HELOC vs. Home Equity Loan
A HELOC and a home equity loan both use home equity as part of the borrowing structure, but they work differently.
A home equity loan generally provides a specific amount of money that is repaid according to a defined schedule.
A HELOC generally provides a revolving credit line that can allow the borrower to access funds during a draw period.
A home equity loan can provide more predictable payments when its rate is fixed, while a HELOC can offer greater flexibility but may have variable rates and changing payment amounts.
If you want to compare the borrowing amount and payment characteristics of a home equity loan, see our Home Equity Loan Calculator.
How to Use the HELOC Payment Calculator
- Enter your current HELOC balance.
- Enter your HELOC credit limit.
- Enter the additional amount you assume will be drawn immediately.
- Enter the current or assumed HELOC interest rate.
- Enter your estimated home value.
- Enter your current mortgage balance.
- Select the remaining draw period.
- Select the repayment period.
- Choose an interest-only or principal-and-interest draw-period assumption.
- Select Calculate HELOC Payment.
Review the estimated payment, available credit after the draw, CLTV, total interest, total modeled payments, and repayment amortization schedule.
Factors That Affect Your HELOC Payment
- HELOC balance: A larger outstanding balance generally creates more interest expense.
- Interest rate: A higher rate generally increases interest costs.
- Credit limit: Your available borrowing is limited by the credit line established by the lender.
- Additional draws: Borrowing more increases the outstanding balance.
- Draw-period payment structure: Interest-only and principal-and-interest payments produce different results.
- Repayment term: A shorter repayment period generally results in higher scheduled payments but can reduce interest over the repayment period.
- Rate changes: A variable rate can cause future payments to rise or fall.
- Fees: Additional lender charges can increase the overall cost of the HELOC.
How to Manage HELOC Costs
- Borrow only the amount you actually need.
- Understand how the interest rate can change.
- Know when the draw period ends.
- Plan for potentially higher repayment-period payments.
- Compare interest rates and fees from different lenders.
- Check the lender's minimum-payment calculation.
- Review annual, transaction, appraisal, and other potential fees.
- Consider making additional principal payments when permitted and affordable.
Important HELOC Risks
- Your home is collateral: A HELOC is generally secured by your home. Failure to meet the agreement's obligations can put the property at risk.
- Variable interest rates: A rate increase can increase your future interest expense and payment.
- Payment shock: Payments can rise when the draw period ends and principal repayment begins.
- Over-borrowing: Repeatedly drawing from the credit line can increase debt and interest costs.
- Property value changes: A decline in home value can reduce your equity position.
- Fees: Fees and other charges can increase the total cost of borrowing.
Related Calculators
These calculators can help you evaluate other parts of your borrowing and personal-finance decisions:
- Home Equity Loan Calculator
- Home Equity Calculator
- Mortgage Principal & Interest Calculator
- Mortgage Interest Calculator
- Debt-to-Income Calculator
- Personal Loan Calculator
- Closing Cost Calculator
- Mortgage Payment Calculator
Frequently Asked Questions
Here are answers to common questions about HELOC payments, credit limits, interest, and using this calculator.
What is a HELOC?
A HELOC, or home equity line of credit, is generally a revolving credit line secured by a home. It can allow a homeowner to access funds subject to the lender's credit limit and other terms.
How does a HELOC payment work?
A HELOC payment depends on the outstanding balance, interest rate, and payment rules in the credit agreement. Some HELOCs may use interest-only payments during part or all of the draw period, while others may require principal and interest.
What is an interest-only HELOC payment?
An interest-only payment generally covers the interest charged on the outstanding balance without reducing the principal through that payment calculation.
What is a HELOC credit limit?
The HELOC credit limit is the amount of credit established under the credit agreement. The amount you can actually access is subject to the lender's terms and your available unused credit.
How is available HELOC credit calculated?
For this calculator, available credit after the assumed draw is calculated as the credit limit minus the current balance and additional amount assumed drawn now.
Why can a HELOC payment increase?
A HELOC payment can increase when the interest rate rises, when the borrower draws more money, or when the draw period ends and principal repayment begins.
Are HELOC interest rates fixed?
Many HELOCs have variable interest rates, although the exact rate structure depends on the lender and credit agreement. This calculator assumes the entered rate remains constant for the modeled estimate.
What is the HELOC draw period?
The draw period is the period during which the borrower may generally access available credit according to the HELOC agreement. The length and rules vary by lender.
What happens when the HELOC draw period ends?
The HELOC generally moves into its repayment phase according to the agreement. New borrowing may no longer be available, and payments can increase because principal repayment may become required.
Does this calculator assume the new draw happens immediately?
Yes. The "Additional Amount Assumed Drawn Now" is treated as an immediate addition to the current HELOC balance. The calculator does not model a draw that occurs at a later date.
Does this calculator account for future HELOC draws?
No. It assumes no additional borrowing after the amount entered as the immediate draw. Actual HELOC costs can be different if you continue drawing from the credit line.
Does the calculator account for HELOC rate changes?
No. It assumes the entered interest rate remains constant. Actual payments may change if the HELOC's variable interest rate changes.
Does the calculator include HELOC fees?
No. The calculator focuses on estimated payment and interest calculations. Actual HELOC costs may include annual fees, transaction fees, closing costs, appraisal expenses, or other lender-specific charges.
What is combined loan-to-value?
Combined loan-to-value, or CLTV, compares the total mortgage and HELOC debt with the estimated value of the home. It is expressed as a percentage.
Does this calculator guarantee HELOC approval?
No. The calculator provides mathematical estimates only. Actual approval, credit limits, rates, and terms depend on the lender and the borrower's financial and property circumstances.
Final Thoughts
A HELOC can provide flexible access to home equity, but understanding the payment structure is important before borrowing. The balance, credit limit, interest rate, draw period, repayment period, and payment rules can all affect your total cost.
Use this HELOC Payment Calculator to compare different borrowing amounts and repayment assumptions. Pay particular attention to the difference between the draw-period payment and the repayment-period payment, especially when an interest-only assumption is used.
Remember that the calculator assumes the additional draw is taken immediately and that the interest rate remains constant. Actual HELOC payments can change as the rate, balance, and lender-specific payment rules change.
Calculator limitation: This calculator provides estimates for educational and planning purposes. It assumes the additional amount entered is drawn immediately, the entered interest rate remains constant, no further draws occur, and the selected payment structure remains unchanged. It does not model every lender-specific HELOC feature, variable-rate adjustment, daily interest calculation, minimum-payment rule, fee, or charge.
Disclaimer: The calculations on this page are mathematical estimates based on the information entered by the user. Actual HELOC interest rates, payments, credit limits, fees, draw periods, repayment periods, minimum-payment requirements, and other terms vary by lender and borrower. A HELOC is generally secured by the home, and failure to meet the obligations of the credit agreement can put the property at risk. This calculator does not provide lending, financial, tax, legal, or investment advice and does not guarantee approval, borrowing capacity, rates, payments, or loan terms. Review the actual credit agreement and obtain current information from the lender or a qualified professional before making a borrowing decision.