HELOC Calculator — Free Home Equity Line of Credit Calculator 2026

A Home Equity Line of Credit (HELOC) lets you borrow against the equity you have built in your home — at significantly lower rates than personal loans or credit cards. But HELOCs have two distinct phases, variable interest rates, and a payment structure that catches many homeowners off guard when the draw period ends.

Our free HELOC calculator shows your available equity, monthly payment during the draw period, monthly payment during repayment, and the full draw/repayment schedule — instantly, with no signup required.

How Much Can You Borrow with a HELOC?

Your HELOC borrowing limit is determined by your home’s current value, your outstanding mortgage balance, and the maximum Loan-to-Value (LTV) ratio your lender allows.

The HELOC borrowing limit formula:

Maximum HELOC = (Home Value × LTV%) − Mortgage Balance

Example: Home value: $400,000 Mortgage balance: $200,000 Lender LTV: 85%

Maximum total debt allowed: $400,000 × 0.85 = $340,000 Minus existing mortgage: $340,000 − $200,000 = $140,000 maximum HELOC

Most lenders allow LTV ratios of 80–90%. Our HELOC calculator uses an adjustable LTV slider so you can see how different lender limits affect your available equity.

HELOC qualification factors beyond LTV:

• Credit score: Most lenders require a minimum 620–680 credit score. Scores above 720 qualify for the best rates and highest LTV ratios.
• Debt-to-income ratio (DTI): Lenders typically cap total debt payments (including the HELOC) at 43–50% of gross monthly income.
• Home appraisal: Lenders require a current appraisal to confirm home value. If your home has appreciated significantly since purchase, your available equity may be higher than you expect.
• Employment and income: Two years of documented income history is standard. Self-employed borrowers typically need two years of tax returns.

How much HELOC can you get? Use the calculator above — enter your home value, mortgage balance, and adjust the LTV slider to match your lender’s limit. The result is your maximum available credit line.

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HELOC Payment Calculator — Draw vs Repayment Period

A HELOC has two distinct phases with completely different payment structures. This is the most important thing to understand before taking out a home equity line of credit.

Draw Period (typically 5–10 years) During the draw period, you can borrow up to your credit limit as needed — similar to a credit card. Most HELOCs require interest-only payments during this period.

Interest-only payment formula:

Monthly Payment = Balance × (Annual Rate ÷ 12)

Example: $50,000 balance at 8.5% APR Monthly payment = $50,000 × (0.085 ÷ 12) = $354/month

Repayment Period (typically 10–20 years) After the draw period ends, you can no longer borrow. Your balance becomes a fixed loan and payments shift to principal + interest — amortized over the repayment period.

Repayment payment formula:

Monthly Payment = Balance × [r(1+r)^n] ÷ [(1+r)^n − 1]
Where r = monthly rate, n = repayment months

Example: $50,000 balance at 8.5% APR, 20-year repayment Monthly payment = $434/month

Our HELOC calculator covers both Interest Only and Principal + Interest payment options during the draw period — toggle between them to see how paying down principal during the draw phase reduces your repayment burden.

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Payment Shock — What Happens When the Draw Period Ends

Payment shock is the single biggest financial risk in a HELOC — and the one thing most HELOC calculators fail to show clearly.

When your draw period ends, your monthly payment does not simply continue. It increases — sometimes dramatically — because you are now paying back principal over a shorter remaining term.

Real payment shock example: $80,000 HELOC balance, 8.5% rate, 10-year draw period ending, 20-year repayment:

• Draw period payment (interest only): $567/month
• Repayment period payment (P+I): $694/month — a 22% jump

At a higher balance or shorter repayment period, the shock is far greater:

$100,000 balance, 8.5%, 10-year repayment:

• Draw period: $708/month
• Repayment: $1,241/month — a 75% increase

This is why our HELOC calculator shows both draw period and repayment period payments side by side — so you can plan for the transition before it happens.

How to reduce payment shock:

• Make principal payments during the draw period (our calculator has a Principal + Interest toggle for this)
• Keep your borrowed balance lower than your credit limit
• Plan the draw period end date around income increases or other debt payoffs
• Consider refinancing the HELOC balance into a fixed-rate home equity loan before the repayment period begins

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How HELOC Interest Is Calculated

HELOC interest is calculated daily on your outstanding balance — not on the full credit limit.

Daily interest formula:

Daily Interest = Balance × (Annual Rate ÷ 365)
Monthly Interest = Sum of daily interest charges

Key point: You only pay interest on what you have actually drawn, not on your total approved credit line. If you have a $100,000 HELOC but have only drawn $30,000, you pay interest on $30,000 only.

Variable rate structure: HELOC rates are variable and tied to the Prime Rate plus a lender margin. The formula is:

Your HELOC Rate = Prime Rate + Margin

In 2026, the Prime Rate is approximately 7.50%. Typical margins range from 0.5% to 2.0% depending on your credit score and LTV:

Credit Score	Typical Margin	Estimated HELOC Rate (2026)
760+ (Excellent)	0.50% – 1.00%	8.00% – 8.50%
720–759 (Very Good)	1.00% – 1.50%	8.50% – 9.00%
680–719 (Good)	1.50% – 2.00%	9.00% – 9.50%
620–679 (Fair)	2.00% – 3.00%	9.50% – 10.50%

Rate caps: Most HELOCs have a lifetime rate cap (typically Prime + 6% or an absolute cap of 18%) and periodic caps limiting how much the rate can increase in any single adjustment period.

How is HELOC interest calculated on a daily basis? Your lender applies the daily rate to your end-of-day balance each day of the month. Monthly statements show total interest accrued — this is your minimum interest-only payment during the draw period.

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HELOC Closing Costs — What to Expect

HELOC closing costs are one of the most searched but least explained aspects of home equity borrowing. Many homeowners are surprised to find costs of $500 to $3,000 at closing even on a “no closing cost” HELOC.

Standard HELOC closing costs:

Fee	Typical Range
Appraisal fee	$300 – $600
Origination / processing fee	0% – 2% of credit line
Title search fee	$75 – $200
Recording fee	$50 – $200
Annual fee	$0 – $100/year
Early closure fee	$300 – $500 (if closed within 3 years)

Total closing costs typically range from $500 to $1,500 for most HELOCs, or up to 1–5% for larger lines.

“No closing cost” HELOCs: Some lenders advertise no closing costs. In most cases, the lender pays the upfront costs but recaptures them through a slightly higher interest rate or an early closure fee if you close the HELOC within 2–3 years. Always calculate the total cost of a “no closing cost” HELOC over your expected usage period — it is often more expensive than paying costs upfront on a lower-rate product.

Our HELOC closing costs calculation uses a standard 1% origination estimate by default — adjust this in the calculator for your specific lender’s terms.

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HELOC vs Home Equity Loan — Which Is Better?

If you have built equity in your home, you have two main borrowing options: a HELOC or a home equity loan (also called a second mortgage). The right choice depends on how you plan to use the funds.

Feature	HELOC	Home Equity Loan
Structure	Revolving credit line	Lump sum, fixed loan
Interest rate	Variable (Prime + margin)	Fixed rate
Payment certainty	Payments change with rates	Same payment every month
Draw flexibility	Borrow as needed	All at once
Best for	Ongoing projects, renovation over time	One-time large expense
Rate risk	High — rises with Prime Rate	None — fixed at origination
Closing costs	$500 – $1,500 typical	$2,000 – $5,000 typical

HELOC is better when:

• You are doing a home renovation in phases and need to draw funds over time
• You want a lower initial payment and have tolerance for rate variability
• You may not use the full credit line and only want to pay interest on what you borrow

Home equity loan is better when:

• You need a specific lump sum (debt consolidation, large purchase, tuition)
• You want predictable fixed payments
• You are in a rising rate environment and want to lock in today’s rate

HELOC vs mortgage refinance: If your existing mortgage rate is already low, a cash-out refinance reprices your entire mortgage at the current higher rate — which can cost tens of thousands over the loan life. A HELOC keeps your existing mortgage in place and only adds a second lien at a higher rate on the incremental amount you borrow. In 2026’s rate environment, a HELOC is typically far cheaper than refinancing a sub-4% mortgage to access equity.

For a side-by-side comparison of your current mortgage payoff timeline vs adding a HELOC payment, see our Mortgage Calculator.

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HELOC to Pay Off Your Mortgage

Using a HELOC to pay off your mortgage faster is a strategy called mortgage acceleration or velocity banking. The concept works by using a HELOC as a cash flow management account — depositing income, paying bills, and applying lump sums to your mortgage principal periodically.

How the strategy works:

1. Open a HELOC up to your maximum available equity
2. Deposit your monthly income into the HELOC (reducing the balance and daily interest)
3. Pay your monthly mortgage from the HELOC
4. Apply any surplus (income minus expenses) to your HELOC balance
5. Repeat — each cycle reduces your mortgage balance faster

Does it actually work? Mathematically, yes — if your HELOC rate is lower than your mortgage rate, and you have consistent positive monthly cash flow to apply as lump sum payments. In 2026, with HELOC rates at 8–10% and many mortgages at 3–7%, the math only works favourably for homeowners with mortgages above the current HELOC rate.

The honest caveat: Using a HELOC to pay off your mortgage requires strict cash flow discipline. If you spend the available HELOC balance rather than applying it to the mortgage, the strategy fails and you end up with more debt at a higher rate.

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HELOC Rates 2026 — Prime Rate and Margin Explained

HELOC rates in 2026 are directly linked to the Federal Reserve’s monetary policy through the Prime Rate. Understanding this relationship is essential for anyone considering a HELOC.

The Prime Rate connection: The Prime Rate is set at approximately 3 percentage points above the Federal Funds Rate. When the Fed raises or lowers rates, the Prime Rate adjusts within days, and most HELOCs adjust in the same billing cycle.

2026 HELOC rate environment: The Federal Funds Rate has been held in a range of 4.25–4.50% through early 2026, putting the Prime Rate at approximately 7.50%. This means:

• Excellent credit HELOC: approximately 8.00–8.50%
• Good credit HELOC: approximately 9.00–9.50%
• Fair credit HELOC: approximately 10.00–11.00%

How to get the best HELOC rate in 2026:

• Maintain a credit score above 720 before applying
• Keep your LTV below 80% — lenders offer better margins at lower LTV
• Have 2+ years of stable documented income
• Shop at least 3–4 lenders — margins vary by 0.5–1.5% between institutions
• Consider a credit union — credit unions often offer lower margins than commercial banks

Rate cap protection: Confirm your HELOC’s rate cap before signing. A lifetime cap of Prime + 6% or an absolute 18% cap is standard. Some lenders offer a fixed-rate conversion option — allowing you to lock in a portion of your balance at a fixed rate during the draw period.

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Is HELOC Interest Tax Deductible in 2026?

HELOC interest deductibility changed significantly with the 2017 Tax Cuts and Jobs Act (TCJA) and the rules remain in effect in 2026.

The current rule: HELOC interest is tax deductible only if the funds are used to buy, build, or substantially improve the home that secures the HELOC. The IRS calls this “qualified residence interest.”

Deductible uses (2026):

• Kitchen or bathroom renovation
• Room addition or home extension
• Roof replacement, HVAC, major structural repairs
• New deck, pool, or significant landscaping attached to the home

Not deductible uses (2026):

• Debt consolidation (paying off credit cards or personal loans)
• College tuition or student loan payoff
• Purchasing a vehicle
• Medical expenses
• General living expenses or vacations

The $750,000 total mortgage debt limit: For married couples filing jointly, HELOC interest is deductible on debt up to a combined $750,000 of total mortgage debt (first mortgage + HELOC). For single filers, the limit is $375,000.

Important: Always consult a tax professional for your specific situation. Our calculator does not include tax benefit calculations — the deductibility depends on how you use the funds, which varies by borrower.

Data Source

HELOC rate and lending data in this calculator is sourced from the Federal Reserve H.15 Statistical Release (Selected Interest Rates), which publishes the weekly Prime Rate used as the benchmark for most HELOC pricing. The 80% Combined Loan-to-Value (CLTV) cap reflects standard underwriting guidelines published by Fannie Mae (Selling Guide B2-1.3) and the Consumer Financial Protection Bureau (CFPB)

HELOC disclosure requirements under Regulation Z. Draw period and repayment period structures are based on CFPB Home Equity Line of Credit examination procedures (2024). Current Prime Rate: 7.50% (Federal Reserve, April 2026). Results are estimates for planning purposes only — actual CLTV limits, margin, and rate vary by lender and creditworthiness.

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Frequently Asked Questions

How is a HELOC payment calculated? During the draw period, your HELOC payment is calculated as your outstanding balance multiplied by your monthly rate (annual rate ÷ 12). On a $50,000 balance at 8.5%, your interest-only payment is $50,000 × (0.085 ÷ 12) = $354/month. During repayment, the balance amortises over the remaining term using the standard mortgage payment formula.

How much HELOC can I get on my home? Your maximum HELOC equals your home value multiplied by the lender’s LTV ratio (typically 80–85%), minus your outstanding mortgage balance. On a $400,000 home with a $200,000 mortgage and 85% LTV, your maximum HELOC is $140,000.

What is the difference between a HELOC draw period and repayment period? The draw period (typically 5–10 years) is when you can borrow and usually pay interest only. The repayment period (typically 10–20 years) begins when you can no longer draw funds and must repay the balance as principal plus interest. The transition causes a significant payment increase — our calculator shows both periods side by side.

Is a HELOC a good idea in 2026? A HELOC makes sense if you need flexible access to equity for home improvements or ongoing expenses, you can tolerate variable rate risk, and you are not refinancing a mortgage that is already below current HELOC rates. With HELOC rates at 8–10% in 2026, using a HELOC to pay off low-rate mortgage debt is generally not advantageous.

What credit score do I need for a HELOC? Most lenders require a minimum credit score of 620. To qualify for the best rates and highest LTV ratios, a score of 720 or above is recommended. Credit unions often have more flexible requirements than commercial banks.

What happens if I don’t use my HELOC? An unused HELOC costs nothing in interest — you only pay interest on amounts actually drawn. However, most HELOCs have an annual fee of $0–$100. Some lenders charge an inactivity fee if you do not draw any funds within 12 months, or an early closure fee if you close the line within 2–3 years of opening.

Can I pay off my HELOC early? Yes, you can pay down or pay off your HELOC balance at any time during the draw period. Some lenders charge an early closure fee of $300–$500 if you close the account entirely within 2–3 years. Paying down the balance is always free — just reduces your outstanding balance and daily interest.

What is the difference between a HELOC and a home equity loan? A HELOC is a revolving line of credit with a variable rate — you draw as needed during the draw period. A home equity loan is a lump sum at a fixed rate repaid in equal monthly instalments. HELOCs offer flexibility; home equity loans offer payment certainty. In a rising rate environment, a home equity loan’s fixed rate is often the safer choice.

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Related Calculators

• Mortgage Calculator — Compare your current mortgage payoff timeline with and without applying HELOC draws to principal. Essential for the mortgage acceleration strategy.
• Closing Costs Calculator — Planning to buy or refinance? Estimate the full closing costs before committing to a new mortgage or HELOC.
• Net Worth Calculator — Your home equity is a major component of net worth. Track total assets versus liabilities including your HELOC balance.