Calculate Home Equity Line of Credit payments and interest.
A HELOC has two phases: the draw period and the repayment period. Here's how the calculations work:
HELOC formulas:
Key insight: During the draw period, you only pay interest. When repayment starts, your payment increases significantly as you pay back principal.
Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]
P = principal, r = periodic interest rate, n = number of payments.The calculator applies the entered principal or balance, periodic interest rate, repayment term and any supported fees or extra payments. Payment and interest figures depend on compounding frequency, payment timing and which taxes, insurance or charges are included.
A HELOC Calculator Loan Payments & Costs A HELOC calculator can help you forecast payments and costs for a home equity line of credit, taking into account the borrowed amount, your interest rate, your repayment term, and how you plan to repay it. While many calculators allow you to estimate an interest-only payment during the HELOC draw period, and then a principal-and-interest payment during the repayment period-or estimate both-the actual loan amounts and fees paid will likely differ, due to the fact that interest rates on a HELOC can change frequently and other factors such as minimum payment requirements and lender fees vary widely.
When making an estimate on money you have already borrowed against the account, take into consideration your outstanding balance. While your line of credit may be at $100,000, but your outstanding balance is only $35,000, an estimated calculation on the $35,000 balance should be more accurate.
How it works: A HELOC Calculator uses the loan balance, rate and payment assumptions that you key in to try to give you an estimate of how your monthly payment may look. With interest only a basic calculation may come up for interest due to the draw period and it may be that outstanding balance and amortise for a number of months in the repayment period.
The name stands for Home Equity Line Of Credit. This credit facility is similar to a fixed lump-sum loan but secured using the equity in your home. Here, the balance outstanding will fluctuate because you can access and repay funds at your convenience. Many HELOCs have variable rates, so the payment you see when setting it up might differ from your full payment over time.
If the modeled draw-period payment is interest only, a monthly estimate can be calculated as:
Monthly Interest Payment = Outstanding Balance × Annual Interest Rate ÷ 12
When the annual interest rate is entered as a percentage, convert it to decimal form before using the formula.
For example, 8% becomes 0.08.
For a fully amortizing repayment period with a constant interest rate, the standard payment formula is:
Monthly Payment = P × r ÷ (1 − (1 + r)−n)
Where:
This shows calculation based on the fact that interest rate does not change within the projected period of repayment. Actual payment can be different in the scenario of adjustable rate HELOC.
Assume a homeowner has drawn $50,000 from a HELOC with an assumed annual interest rate of 8.00%.
Outstanding balance: $50,000
Annual interest rate: 8.00%
Monthly rate: 0.08 ÷ 12 = 0.0066667
Estimated monthly interest:
$50,000 × 0.0066667 ≈ $333.33
Based on that plan of paying only interest each month with no change to the principal and rate, the approximate amount of interest you'll be paying per month is $333.33.
Now assume the same $50,000 balance must be repaid over 10 years at an unchanged 8.00% annual rate.
Number of monthly payments: 10 × 12 = 120
Monthly interest rate: 0.08 ÷ 12 = 0.0066667
Using the amortization formula, the estimated monthly principal-and-interest payment is approximately:
$606.64 per month
This shows why a payment might go up when a HELOC switches from a interest-only draw period to a repayment structure including a principal reduction payment.
The biggest difference is between the credit limit, the amount drawn, and the outstanding balance. Usually, the amount on your bill corresponds to how much you currently owe the lender, not just how much you can potentially borrow.
When the remaining loan amount is higher, your interest charges go up, and often your required repayment amount also gets higher. The higher the interest rate, the higher the estimated payment. However, when the repayment period is longer, it often decreases the monthly loan repayment amount but you could pay more interest.
To compare situations, adjust only one factor at time. For instance, look at that exact $50,000 balance at 6 percent and also at 8 percent. After that look at two different repayment time frames at 8 percent. Then the effect of any given assumption is clearer.
A typical HELOC will typically have two phases. Under the draw period you can take money out of the credit line up to the limit, pay money back, and take out more money as allowed by the terms of the agreement. What you’ll need to pay the lender during draw period varies but could possibly involve paying just the interest, or perhaps both some interest and some of the principal.
Although it is standard to cease borrowing at the start of the repayment stage of a loan and repay it in installments as specified by the loan terms, the repayments may begin to escalate rapidly at this stage if they include payment of capital.
A HELOC calculator might show each of these phases distinctly so double check that what you're seeing is a payment toward a HELOC, of a draw period payment, an of a draw period payment, of a draw period payment of
Most HELOCs have variable interest rates. This means the interest rate on the loan changes at times according to the contract for the line of credit. Should rates increase, interest incurred on remaining loan amounts could increase. Should rates decrease, interest could decrease.
For example, an interest-only payment on a $50,000 balance would be different at 6%, 8%, and 10%:
| Annual Rate | Approximate Monthly Interest on $50,000 |
|---|---|
| 6.00% | $250.00 |
| 8.00% | $333.33 |
| 10.00% | $416.67 |
The above table, again, is based on a consistent balance of $50,000 and what could essentially be termed a rough estimate of interest based on average interest rates and one month of payments. HELOC interest may vary based on when the lender bills customers and how the balance is actually computed.
Home equity is generally the difference between the home's current value and debt secured by the property.
Home Equity = Home Value − Outstanding Mortgage Debt
For example, if a home is worth $500,000 and the existing mortgage balance is $300,000:
$500,000 − $300,000 = $200,000 of estimated equity
However, that does not mean that the home owner can actually borrow the full $200,000 amount. They might have their own criteria for the client that may influence how much they are willing to lend based on credit-worthiness, income, property value, and the loan-to-value ratio.
A lender may evaluate the debt secured by the property relative to its value using a combined loan-to-value calculation.
CLTV = (Mortgage Balance + HELOC Amount Included in the Calculation) ÷ Home Value × 100
For example, assume:
CLTV = ($300,000 + $50,000) ÷ $500,000 × 100 = 70%
Depending on how the lender looks at a HELOC - how the amount you borrowed or the entire credit line - a calculator outcome is nothing more than an estimate of whether or not you qualify.
Because an interest-only payment doesn't lower the amount you originally borrowed, it may appear to be an amount you can afford, when in reality it's money that can add up over time. You pay interest only and never actually touch your principal amount; meaning the balance is the same as it always was.
As an instance example, if you happen to paid roughly $333.33 a month in interest on a $50,000 principal at eight%, that may alone may be nowhere adequate to pay off the $50,000 principal. When principal repayment begins, your monthly fee may be capable of rise.
A simple HELOC Calculator often assumes principal and interest only and doesn’t take into account lender-related costs like application fees, appraisal costs, annual fees, account-maintenance fees, early-closure costs, etc. There may be additional fees depending on a credit agreement.
The real cost of borrowing should be assessed by the lender's full disclosure rather than the calculator payment alone.
It depends on the loan terms. You could get a principal-and-interest payment by factoring in the term of payment and amortizing outstanding amount on loan against this term with the interest rates of payment. You could calculate estimate for an interest-only payment with the sum of funds in draws, and interest rates during a draw phase.
Depends on how the rate of interest and schedule for repayment works. Simple estimate at 8 percent compounded annually for interest-only repayment on a principal of $50k would roughly be $333.33/month. A fully amortized repayment of ten years at the continued same rate (compounded annually) is $606.64/month roughly.
It can! If the HELOC features variable interest rates, changes to the relevant index can also effect your interest rate, monthly payment, and how much you pay in interest over the life of the HELOC.
Interest is usually charged against the amount you owe rather than against the unused credit you could draw, depending on your loan agreement.
No further borrowing takes place after this and the loan balance goes into repayment as per the loan schedule. The payment may increase on account of paying back both the interest and principal.
A home equity line of credit (HELOC) often uses a revolving loan with periods during which you are permitted to borrow the loan more than once. A home equity loan often pays out money as a lump sum that is repaid in terms of a regular payment plan.
Enter the expected amount, rate and term, calculate a base case, then increase the rate or shorten the term. Compare the monthly payment and total interest to understand the trade-off between cash flow and borrowing cost.
You can illustrate how a lender may have varying amounts for your HELOC payments given different amounts you've borrowed by looking at several of these examples. For the purposes of this demonstration; a fixed rate has been used (and lender fees are disregarded, as are future increases to rate)
| HELOC Balance | Annual Rate | Interest-Only Monthly Estimate |
|---|---|---|
| $10,000 | 8% | $66.67 |
| $25,000 | 8% | $166.67 |
| $50,000 | 8% | $333.33 |
| $75,000 | 8% | $500.00 |
| $100,000 | 8% | $666.67 |
The estimates above use the simplified interest-only formula: Balance × Annual Rate ÷ 12. They demonstrate how the interest payment changes when the outstanding balance changes while the rate remains constant.
Since a HELOC is usually a revolving line of credit, borrowing more will typically expand the amount that you have used. All other things being equal (meaning, interest rate), the larger the balance, the higher the interest you will pay.
For example, if you expand an outstanding balance from $25,000 to $50,000 at the same 8 percent interest annual interest rate, simple interest-only estimates would jump from somewhere around $166.67 per month to $333.33 per month.
And, since a HELOC usually changes value (up or down) over the draw period, actual payments can also change with changes in balance. This is part of why a payment estimate doesn’t show everything you’ll pay to use a HELOC.
For a certain balance and interest rate, an extended amortization period would mean that the minimum principal-and-interest payment would be lower, while at the same time that more total interest will be paid over the term of the modeled loan.
For example, a $50,000 balance at an assumed 8% annual rate produces approximately these payments under different fully amortizing terms:
| Repayment Term | Approximate Monthly Payment |
|---|---|
| 5 years | $1,013.82 |
| 10 years | $606.64 |
| 15 years | $477.82 |
| 20 years | $418.22 |
These are based on an 8% interest rate held over the entire repayment period, using conventional monthly amortization. Your actual HELOC may vary.
Monthly payment and total interest are different measures. A lower monthly payment does not necessarily mean the borrowing is less expensive overall.
The total amount of interest on a fully-amortizing loan can be calculated by taking the monthly payment, multiplied by the number of monthly payments and subtracting original principal:
Total Interest = (Monthly Payment × Number of Payments) − Principal
For example, using the 10-year, $50,000, 8% scenario:
$606.64 × 120 − $50,000 ≈ $22,797
This is an illustration based on a constant rate and scheduled amortization. It is not a prediction of the total interest on an actual variable-rate HELOC.
A payment estimate may not capture every cost or future event associated with a HELOC. Depending on the calculator's inputs, the result may exclude:
For an actual borrowing decision, compare the calculator's assumptions with the terms in the lender's current HELOC agreement and disclosures.
The HELOC balance is the amount currently owed. Available credit is the portion of the credit line that remains available to borrow. These values should not be entered interchangeably.
Say your HELOC has a $75,000 credit line, you’ve used $30,000, and you still have $45,000 available. Your payment calculation on that available balance is typically determined by the outstanding balance and lender payment requirements.
If the other values remain fixed for each scenario, the results become much simpler to compare. Given that real HELOC rates change due to economic fluctuations, multiple interest rate assumptions may give you a better picture of how rising interest rates would impact your costs.
| Term | Meaning |
|---|---|
| HELOC | Home equity line of credit secured by the borrower's home. |
| Credit Limit | The maximum amount available under the credit agreement, subject to its terms. |
| Outstanding Balance | The amount currently owed on the HELOC. |
| Draw Period | The period during which borrowing may generally be available under the agreement. |
| Repayment Period | The period during which the outstanding balance is repaid according to the agreement. |
| Interest-Only Payment | A payment structure in which the calculated payment may cover interest without reducing principal. |
| Variable Rate | An interest rate that can change according to the terms of the HELOC. |
| Home Equity | The difference between a property's value and outstanding debt secured by the property. |