US HELOC Calculator 2026

Use GlobalCalqulate’s free US HELOC Calculator (2026) to estimate your home equity line of credit (HELOC) monthly payment, total interest cost, and borrowing power using home value, mortgage balance, and CLTV/LTV limits. Model interest-only draw period payments, full principal-and-interest repayment payments, and stress-test different rate and term scenarios for renovations or debt consolidation.

Last revised 6 September 2026

By Team GlobalCalqulate · About our editorial standards

Property Information

Current Home Value

Existing Mortgage

Remaining Mortgage Balance

HELOC Request

Desired HELOC Amount

CLTV & Borrowing Power

Maximum Combined Loan-to-Value (CLTV)

HELOC Interest Rate Settings

HELOC Interest Rate

Draw Period

Draw Period (Years)

Repayment Period

Repayment Period (Years)

Inflation & Economic Assumptions

Expected Inflation Rate

Calculation type: Exact calculation.

Formula & methodology

Limitations

Assumes the full approved line is drawn at the start and never redrawn. Real HELOCs are revolving, and most borrowers draw in stages.
HELOC rates are usually variable and tied to the prime rate. The calculator holds the rate you enter constant, so a rate rise during the draw or repayment period is not shown.
Rate caps, floors and minimum-payment rules in your credit agreement are not modelled.
Borrowing power uses a simple combined loan-to-value limit against the home value you enter. Actual approval also depends on credit score, income, debt-to-income ratio, property type and appraised value.
Closing costs, annual fees, inactivity fees and early-termination fees are excluded.
Interest deductibility depends on whether the funds are used to buy, build or substantially improve the home, and is not modelled.
An estimate, not a lending offer.

This page is educational. It applies a standard formula to the figures you enter and shows the arithmetic behind the result. It is an estimate, not an offer, a quotation or financial advice: real costs depend on the provider's pricing, fees and underwriting, and on circumstances this calculator does not collect.

Financial Disclaimer: This calculator estimates available home equity line of credit and payments using the home value, existing mortgage balance, and rate you enter; it does not account for lender-specific combined loan-to-value limits, draw-period vs. repayment-period rate changes, closing costs, or credit-score-based pricing. Actual HELOC terms vary by lender. This tool is for planning purposes only and is not financial advice — confirm final terms with your lender. Full disclaimer.

Methodology, Assumptions & Disclaimers (US HELOC Calculator)

This US HELOC (home equity line of credit) calculator is designed to help homeowners model how much equity they may be able to access and what monthly payments could look like under a typical interest-only draw period followed by a principal-and-interest repayment period. It uses a simplified combined loan-to-value (CLTV) framework and standard amortisation math to provide planning-level estimates, not lender offers or personalised financial advice.

Borrowing power is estimated by multiplying your entered home value by a maximum CLTV percentage and subtracting your existing first mortgage. The approved HELOC amount in the model is the smaller of this available equity and the draw amount you request. Actual underwriting decisions will also consider credit score, income, property type, location, and detailed lender policies that are not captured here.

During the draw period, the engine assumes interest-only payments on the approved HELOC amount using the annual percentage rate (APR) you enter divided by 12. Once the draw period ends, the calculator models a level monthly payment that would fully amortise the remaining balance over the repayment term, assuming the balance is fully drawn at the start of the draw period and there are no additional draws, fees, or prepayments. Real HELOCs may have variable rates, rate caps and floors, minimum payment rules, and fees that change these outcomes.

An optional inflation adjustment discounts the repayment phase payments back into today's US dollars using the inflation rate you choose. This is intended to provide a high-level view of real purchasing-power cost over long horizons, not to forecast future inflation or Federal Reserve policy. The calculator does not model tax deductibility, closing costs, state-by-state lending rules, or how a HELOC interacts with your existing first mortgage beyond CLTV.

Methodology and assumptions are informed by standard US mortgage and home equity practices and educational materials from organisations such as the Consumer Financial Protection Bureau (CFPB), the Federal Reserve, and the Internal Revenue Service (IRS). However, every lender designs its own HELOC product, and published guidance may change over time. Always rely on official loan estimates, closing disclosures, and professional advice before making borrowing decisions.

Last updated: October 1, 2026. This tool is for informational and educational purposes only and does not provide financial, tax, or legal advice. Using this calculator does not create a client–advisor relationship, and results are estimates only. Your actual borrowing limit, interest rate, payment schedule, and tax treatment will depend on lender terms, your credit profile, market conditions, and applicable US laws and regulations.

Help & FAQs

Frequently Asked Questions

Clear answers to common questions to help you use this calculator confidently.

What is a HELOC Calculator?

Tap to view the answer

A HELOC Calculator estimates potential borrowing amounts, monthly payments, and interest costs for a Home Equity Line of Credit. It provides indicative figures based on your home value, mortgage balance, and interest rate. The results are meant for planning and general understanding.

Are fees and closing costs included?

Tap to view the answer

No. HELOCs include origination fees (0.5-2%), appraisal fees ($300-700), annual maintenance fees ($25-100), and closure fees ($300-500). CFPB requires Truth in Lending (TILA) disclosures. Add these to this calculator's estimates for true total borrowing cost.

How much home equity can I access as a HELOC?

Tap to view the answer

Lenders typically allow 80-90% combined loan-to-value (CLTV). If your home is worth $400k with a $300k mortgage, you have $100k equity. At 80% CLTV, maximum borrow is $20k ($400k × 80% - $300k). Credit score and debt-to-income also matter.

Are HELOC interest payments tax-deductible?

Tap to view the answer

Interest is tax-deductible if used for home improvements (IRC Section 163(h)). Interest on personal expenses, credit card payoff, or other uses is NOT deductible. IRS caps total deduction to $750k of home equity debt. Consult your CPA.

Does the calculator assume a variable interest rate?

Tap to view the answer

Yes, HELOCs commonly have variable rates, and the calculator may assume a constant rate for simplicity. If rates change, actual costs may vary. You can adjust the rate to explore scenarios.

Need more help? Contact support or email globalcalqulate@gmail.com

We typically reply within 24–48 hours.

Sources & references

Home equity loans and home equity lines of credit — Consumer Financial Protection Bureau
Interest on home equity loans, often still deductible under new law — Internal Revenue Service

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Year-by-year projection (approximate) – yearly breakdown of opening balance, interest, principal, and closing balance.
Year	Opening	Interest	Principal	Closing
Y1	$120,000.00	$9,808.31	$2,461.44	$117,538.56
Y2	$117,538.56	$9,597.38	$2,672.36	$114,866.20
Y3	$114,866.20	$9,368.38	$2,901.36	$111,964.84
Y4	$111,964.84	$9,119.76	$3,149.99	$108,814.85
Y5	$108,814.85	$8,849.83	$3,419.92	$105,394.93
Y6	$105,394.93	$8,556.77	$3,712.98	$101,681.96
Y7	$101,681.96	$8,238.60	$4,031.15	$97,650.81
Y8	$97,650.81	$7,893.16	$4,376.59	$93,274.22
Y9	$93,274.22	$7,518.12	$4,751.63	$88,522.59
Y10	$88,522.59	$7,110.94	$5,158.80	$83,363.79
Y11	$83,363.79	$6,668.87	$5,600.87	$77,762.92
Y12	$77,762.92	$6,188.92	$6,080.82	$71,682.10
Y13	$71,682.10	$5,667.84	$6,601.90	$65,080.19
Y14	$65,080.19	$5,102.11	$7,167.63	$57,912.56
Y15	$57,912.56	$4,487.90	$7,781.84	$50,130.72
Y16	$50,130.72	$3,821.06	$8,448.68	$41,682.04
Y17	$41,682.04	$3,097.07	$9,172.67	$32,509.36
Y18	$32,509.36	$2,311.05	$9,958.70	$22,550.67
Y19	$22,550.67	$1,457.67	$10,812.08	$11,738.59
Y20	$11,738.59	$531.16	$11,738.59	$0.00
Total	—	$125,394.91	$120,000.00	$0.00

Year

Opening

Interest

Principal

Closing

$120,000.00

$9,808.31

$2,461.44

$117,538.56

$9,597.38

$2,672.36

$114,866.20

$9,368.38

$2,901.36

$111,964.84

$9,119.76

$3,149.99

$108,814.85

$8,849.83

$3,419.92

$105,394.93

$8,556.77

$3,712.98

$101,681.96

$8,238.60

$4,031.15

$97,650.81

$7,893.16

$4,376.59

$93,274.22

$7,518.12

$4,751.63

$88,522.59

Y10

$88,522.59

$7,110.94

$5,158.80

$83,363.79

Y11

$83,363.79

$6,668.87

$5,600.87

$77,762.92

Y12

$77,762.92

$6,188.92

$6,080.82

$71,682.10

Y13

$71,682.10

$5,667.84

$6,601.90

$65,080.19

Y14

$65,080.19

$5,102.11

$7,167.63

$57,912.56

Y15

$57,912.56

$4,487.90

$7,781.84

$50,130.72

Y16

$50,130.72

$3,821.06

$8,448.68

$41,682.04

Y17

$41,682.04

$3,097.07

$9,172.67

$32,509.36

Y18

$32,509.36

$2,311.05

$9,958.70

$22,550.67

Y19

$22,550.67

$1,457.67

$10,812.08

$11,738.59

Y20

$11,738.59

$531.16

$11,738.59

$0.00

Total

—

$125,394.91

$120,000.00

$0.00

How to Use This Calculator

Start with your US property details

Enter your current home value and the remaining balance on your first mortgage. This allows the calculator to estimate your combined loan-to-value (CLTV) ratio, which most US lenders use to cap HELOC limits.

Add lender CLTV limit and desired draw

Enter the maximum CLTV percentage your lender is quoting (for example, 80% or 85%) and the HELOC amount you are considering drawing for renovations, debt consolidation, or other goals.

Set interest rate, draw period, and repayment term

Input the HELOC interest rate, the length of the interest-only draw period, and the years you expect to take to repay the balance. The model assumes the line is fully drawn at the start of the draw period for conservative planning.

Review monthly payments and total cost

Click Calculate to see estimated interest-only payments during the draw period, full principal-and-interest payments during repayment, total interest across both phases, and an optional inflation-adjusted view of the repayment phase.

Understanding Your Results

Interest-only draw period payment
Shows the estimated monthly payment if you only cover interest during the draw period, assuming you fully draw the approved HELOC at the stated APR.
Principal and interest repayment payment
Estimates the level monthly payment required to pay off the drawn HELOC balance over the repayment term once the draw period ends.
Approved HELOC amount and borrowing power
Highlights how much of your requested HELOC is supported by your home value, mortgage balance, and maximum CLTV, along with any remaining borrowing capacity.
Combined loan-to-value (CLTV)
Shows your approximate CLTV after adding the HELOC to your existing mortgage. Many US lenders cap CLTV to manage risk, so this metric is central to approval decisions.
Total interest across draw and repayment
Summarises the estimated interest you may pay on the HELOC over both the interest-only draw period and the principal-and-interest repayment period, assuming rate and payments stay constant.
Inflation-adjusted repayment phase cost
If you enable inflation adjustment, the tool discounts the repayment phase payments back into today's US dollars so you can compare the real cost of using a HELOC to other long-term goals.

Key Tips

✓
Treat a HELOC as a strategic tool for renovations, education, or consolidating higher-rate debt rather than an open line for everyday spending.
✓
Stress-test your budget for the higher principal-and-interest payments that begin when the draw period ends, not just the initial interest-only payments.
✓
Compare the total cost of using a HELOC with alternatives such as a cash-out refinance, personal loan, or doing a smaller project in stages.
✓
If you consolidate credit card balances into a HELOC, close or reduce limits on old cards where appropriate so you are not tempted to rebuild the same debt.
✓
Review your HELOC terms for rate caps, annual fees, and draw period rules so there are no surprises later.

US HELOCs, CLTV and Payment Strategy Explained

What is a US HELOC and how does it work?

A home equity line of credit (HELOC) is a revolving credit line secured by the equity in your US home. Instead of receiving one lump-sum loan, you get an approved credit limit and can draw, repay, and redraw funds during the draw period, much like a credit card backed by your property. Your borrowing capacity is usually driven by a maximum combined loan-to-value (CLTV) ratio set by the lender, your credit profile, income, and property type.

Many US lenders offer draw periods of 5–10 years with interest-only payments, followed by a 10–20 year repayment period where the balance is amortised. Because the line is secured by your home, rates are often lower than unsecured personal loans or credit cards—but your home is at risk if you cannot keep up with payments.

How this calculator estimates HELOC borrowing power (CLTV method)

This calculator uses a common US-style CLTV framework to estimate borrowing power. It multiplies your home value by your chosen maximum CLTV percentage to estimate the total debt your lender may allow to be secured by the property. It then subtracts your existing first mortgage balance to estimate available equity. The approved HELOC amount is the smaller of that available equity and the draw amount you requested.

For example, if your home is worth $450,000 and your mortgage balance is $280,000, an 85% CLTV cap implies a maximum total debt of $382,500. Subtracting the mortgage leaves roughly $102,500 in potential equity. If you request a $50,000 HELOC, the calculator treats that entire amount as approved; if you request $120,000, the approved amount would be capped around $102,500 in this simplified model.

Draw period vs repayment period and the payment jump

During the draw period many HELOCs allow you to make interest-only payments, which keeps monthly cost relatively low but does not reduce principal. The repayment period switches to principal-and-interest payments that fully amortise the balance over the remaining term.

The calculator reflects this by estimating (1) an interest-only payment during the draw years based on your approved HELOC amount and APR, and (2) a level repayment payment that would retire the drawn balance over the repayment term. This makes it easier to see how much your monthly obligation could increase once you move from draw to repayment, and whether that fits alongside your mortgage, taxes, insurance, and other goals.

Worked example: US homeowner using a HELOC for renovations

Imagine a US homeowner with a $450,000 property and a $280,000 existing mortgage. Their lender is comfortable up to an 85% CLTV and offers a HELOC at 8% APR with a 10-year interest-only draw period and a 20-year repayment period. The homeowner would like to draw $50,000 to update their kitchen and bathrooms.

Using these figures, the calculator estimates borrowing power based on CLTV, confirms that $50,000 fits within the available equity, and then calculates the approximate interest-only payment during the draw years, along with the principal-and-interest payment required during repayment. It also summarises total interest paid across both phases and, if you enable inflation adjustment, an approximate real-dollar cost of the repayment phase. You can rerun the example with different draw amounts, rates, or terms to stress-test cash flow before you sign any agreement.

HELOC vs cash-out refinance vs home equity loan

US homeowners weighing a HELOC often compare it to a cash-out refinance or a traditional home equity loan. A HELOC tends to offer more flexibility—you can borrow only what you need when you need it—but payments can fluctuate as rates change or when you move from interest-only to principal-and-interest. A cash-out refinance replaces your first mortgage and may offer a single fixed rate but restarts the clock on your entire mortgage balance. A home equity loan usually provides a fixed-rate lump sum with predictable payments but less flexibility than a line of credit.

This calculator focuses on the HELOC side of the comparison. For a full picture, pair it with mortgage and refinance calculators so you can compare monthly payments, total interest, and how much of your home equity you are putting at risk under each option.

Common US HELOC mistakes and risk factors

Working through scenarios in this tool can highlight common HELOC pitfalls: using a line of credit for discretionary lifestyle spending, underestimating how much payments can rise when the draw period ends, ignoring the impact of rising variable rates, or consolidating high-interest credit card debt into a HELOC and then running card balances back up.

Because a HELOC is secured by your home, falling behind on payments can have more serious consequences than missing a credit card bill. Before using a HELOC for debt consolidation, compare the total cost and repayment timeline with a structured debt payoff plan and ensure you have a realistic budget that prevents balances from creeping back up.

Formula & methodology

Limitations

Assumes the full approved line is drawn at the start and never redrawn. Real HELOCs are revolving, and most borrowers draw in stages.
HELOC rates are usually variable and tied to the prime rate. The calculator holds the rate you enter constant, so a rate rise during the draw or repayment period is not shown.
Rate caps, floors and minimum-payment rules in your credit agreement are not modelled.
Borrowing power uses a simple combined loan-to-value limit against the home value you enter. Actual approval also depends on credit score, income, debt-to-income ratio, property type and appraised value.
Closing costs, annual fees, inactivity fees and early-termination fees are excluded.
Interest deductibility depends on whether the funds are used to buy, build or substantially improve the home, and is not modelled.
An estimate, not a lending offer.

Calculator inputs

Property Information

Existing Mortgage

HELOC Request

CLTV & Borrowing Power

HELOC Interest Rate Settings

Draw Period

Repayment Period

Inflation & Economic Assumptions

Your results

Formula & methodology

Limitations

Methodology, Assumptions & Disclaimers (US HELOC Calculator)

What is a HELOC Calculator?

Are fees and closing costs included?

How much home equity can I access as a HELOC?

Are HELOC interest payments tax-deductible?

Does the calculator assume a variable interest rate?

Sources & references

Related calculators

More United States calculators

Popular US Calculators

Calculator inputs

Property Information

Existing Mortgage

HELOC Request

CLTV & Borrowing Power

HELOC Interest Rate Settings

Draw Period

Repayment Period

Inflation & Economic Assumptions

Your results

Year-by-year projection (approximate)

How to Use This Calculator

Example US HELOC Calculation

Understanding Your Results

Key Tips

US HELOCs, CLTV and Payment Strategy Explained

What is a US HELOC and how does it work?

How this calculator estimates HELOC borrowing power (CLTV method)

Draw period vs repayment period and the payment jump

Worked example: US homeowner using a HELOC for renovations

HELOC vs cash-out refinance vs home equity loan

Common US HELOC mistakes and risk factors

When to use this US HELOC calculator and related tools

Formula & methodology

Limitations

Year-by-year projection (approximate)

How to Use This Calculator

Example US HELOC Calculation

Understanding Your Results

Key Tips

US HELOCs, CLTV and Payment Strategy Explained

What is a US HELOC and how does it work?

How this calculator estimates HELOC borrowing power (CLTV method)

Draw period vs repayment period and the payment jump

Worked example: US homeowner using a HELOC for renovations

HELOC vs cash-out refinance vs home equity loan

Common US HELOC mistakes and risk factors

When to use this US HELOC calculator and related tools