Home Equity / HELOC Calculator

Name: Home Equity / HELOC Calculator
Author: Jitendra Kumar

Estimate available equity, combined loan-to-value, HELOC draw and repayment payments, fixed home equity loan payments, closing costs, DTI, and payment shock.

Last Updated: May 2026

Secured Borrowing Estimate

Home equity loans and HELOCs use your home as collateral. Compare payment and CLTV, but also review appraisal, lien, variable-rate, freeze, and foreclosure risk with the lender.

Home Equity Planning

Estimate borrowing room, CLTV, and payment shock

Load a scenario or enter a lender quote to compare a fixed home equity loan with a HELOC draw-period and repayment-period payment.

Property and Equity

Product Type

Revolving line with an interest-only draw period and later repayment period.

Home Value

Mortgage Balance

Other Property Liens

Requested Credit Line

Initial Draw

Amount expected to be borrowed at opening.

Target Max CLTV

Rate, Term, and Costs

Interest Rate

Draw Period

Repayment Term

Annual Fee

Closing Costs

Fixed Closing Costs

Closing Cost Treatment

Gross Monthly Income

Other Monthly Debt

Home Equity / HELOC Calculator Disclaimer

This calculator is an educational estimate, not mortgage, legal, tax, or financial advice. Actual home equity loan and HELOC terms depend on appraisal, title, lien position, occupancy, credit, income, lender rules, rate index, margin, fees, and state law.

Reviewed For Methodology, Labels, And Sources

Every CalculatorWallah calculator is published with visible update labeling, linked source references, and founder-led review of formula clarity on trust-sensitive topics. Use results as planning support, then verify institution-, policy-, or jurisdiction-specific rules where they apply.

Reviewed By

Jitendra Kumar, Founder & Editorial Standards Lead, oversees methodology standards and trust-sensitive publishing decisions.

Review editor profile

Topic Ownership

Sales tax and tax-sensitive estimate tools, Education and GPA planning calculators, Health, protein, and screening-formula pages, Platform-wide publishing standards and methodology

See ownership standards

Methodology & Updates

Page updated May 2026. Trust-critical pages are reviewed when official rates or rules change. Evergreen calculator guides are checked on a recurring quarterly or annual cycle depending on topic volatility.

Sources & methodology About the review process

How to Use This Calculator

Step 1: Enter property value and liens
Use a current home value estimate, first mortgage payoff balance, and any other property liens.
Step 2: Choose loan type
Select HELOC for draw and repayment modeling or home equity loan for fixed installment payments.
Step 3: Set requested amount and CLTV limit
Enter the desired credit line or loan amount and the combined loan-to-value target from your lender.
Step 4: Add rate, terms, and costs
Model the quoted rate, draw period, repayment term, fixed loan term, closing costs, and annual fee.
Step 5: Review payment and risk indicators
Compare available equity, CLTV after the request, payment shock, DTI, total interest, and cost treatment.

How This Calculator Works

The calculator first estimates current equity by subtracting existing property liens from the home value. It then applies the selected combined loan-to-value limit to estimate how much secured borrowing capacity remains before the requested home equity loan or HELOC.

For a fixed home equity loan, the requested amount and any financed closing costs are amortized over the selected fixed term. For a HELOC, the draw-period payment is modeled as interest-only on the initial draw, then the repayment-period payment amortizes that balance over the repayment term.

The payment-shock result is the increase from the modeled draw payment to the repayment payment. Real HELOC payments may move differently because variable rates, future draws, principal payments, minimum payment rules, and annual fees vary by lender.

What You Need to Know

1) Home Equity and HELOC Formulas

Home equity borrowing starts with the property value and all debt already secured by the home. The calculator uses a target CLTV limit to estimate remaining borrowing room, then models payments based on whether the product is a lump-sum home equity loan or a HELOC.

Metric	Formula	Meaning
Available borrowing	Home value x max CLTV - existing liens	Estimates capacity before the new home equity loan or HELOC.
CLTV	(Existing liens + requested line) / home value	Measures combined debt secured by the property.
HELOC draw payment	Initial draw x monthly rate + monthly annual fee	Models interest-only draw-period payments.
Repayment payment	P x r x (1+r)^n / ((1+r)^n - 1)	Amortizes the drawn balance over the repayment term.

2) Product Comparison

The right structure depends on the project, rate quote, payment risk, and whether borrowing will happen all at once or in stages.

Option	Structure	Common fit
Home equity loan	Lump-sum borrowing with a predictable amortizing payment.	Project with a known cost and fixed payoff schedule.
HELOC	Reusable credit line with draw-period flexibility.	Renovations or staged spending where timing is uncertain.
Cash-out refinance	Replaces the first mortgage and adds cash-out proceeds.	Worth comparing when the first mortgage rate can improve or stay competitive.
Personal loan	Unsecured borrowing without a property lien.	Smaller projects where collateral risk outweighs rate savings.

3) HELOC Payment Shock

A HELOC may look inexpensive during the draw period because payments can be interest-only. When repayment starts, the payment may rise because principal repayment begins. Variable-rate changes can raise or lower both phases.

4) Where to Go Next

Compare a home equity option with a first mortgage change in the Mortgage Refinance Break-even Analyzer. For a detailed fixed payment schedule, use the Loan Amortization Calculator.

Keep the research moving with Mortgage Calculator, Mortgage Refinance Break-even Analyzer, Loan Amortization Calculator, and Debt-to-Income Ratio Calculator.

Frequently Asked Questions

It estimates available home equity, combined loan-to-value ratio, borrowing capacity, closing costs, fixed home equity loan payments, HELOC draw-period payments, repayment-period payments, total interest, and debt-to-income impact.

CLTV compares all mortgage debt secured by the property, including the first mortgage and new home equity borrowing, with the estimated home value. Lenders use CLTV limits to decide how much equity may be borrowed.

A home equity loan usually provides a lump sum with a fixed payment schedule. A HELOC is a revolving line of credit that lets you draw funds during a draw period, then repay the balance during a repayment period.

Many HELOCs allow interest-only payments during the draw period. When repayment begins, the payment may include both principal and interest, and variable-rate changes can also affect the payment.

No. Enter the rate from your lender quote or a rate you want to stress test. HELOC rates are often variable, so actual payments can change if the index or margin changes.

Some lenders allow certain costs to be financed, waived, or recaptured if the line closes early. This calculator lets you model costs paid upfront or added to the balance, but lender terms control the real treatment.

Yes. These loans are secured by the home. If payments are not made, the lender may have foreclosure rights depending on the loan documents and state law.