Home Equity Line of Credit (HELOC) Calculator
Calculate heloc with our free Heloc Calculator. Compare rates, see projections, and make informed financial decisions. Free to use with no signup required.
Formula
Available HELOC = (Home Value x CLTV Limit) - Mortgage Balance
Available equity is calculated by multiplying home value by the maximum combined loan-to-value ratio and subtracting the existing mortgage balance. Draw period payments are interest-only: Payment = Balance x Monthly Rate. Repayment period uses standard amortization: PMT = P x [r(1+r)^n] / [(1+r)^n - 1].
Worked Examples
Example 1: Home Renovation HELOC
Problem: A homeowner with a $450,000 home and $280,000 mortgage wants a $60,000 HELOC at 8.0% for kitchen renovation. 10-year draw, 20-year repayment, 85% CLTV limit.
Solution: Available equity = $450,000 x 0.85 - $280,000 = $102,500\n$60,000 draw is within limits\nDraw period interest-only: $60,000 x 8%/12 = $400/month\nDraw period interest total: $400 x 120 = $48,000\nRepayment monthly: $502\nRepayment interest: $60,480\nTotal interest: $48,000 + $60,480 = $108,480
Result: Draw: $400/mo | Repay: $502/mo | Total interest: $108,480
Example 2: Debt Consolidation HELOC Analysis
Problem: Compare using a $30,000 HELOC at 9% vs keeping $30,000 in credit card debt at 22% APR with $600 minimum payments.
Solution: Credit card: $600/month at 22%\nPayoff time: 82 months\nTotal interest: $19,177\n\nHELOC draw period: $30,000 x 9%/12 = $225/month (interest only)\nHELOC repayment: $270/month for 20 years\nTotal HELOC interest: $27,000 + $34,800 = $61,800\n\nBut if you pay $600/mo on HELOC repayment:\nPayoff in 64 months, total interest: $9,642\nSavings vs credit card: $9,535
Result: HELOC saves $9,535 if matching CC payment amount
Frequently Asked Questions
What is a HELOC and how does it differ from a home equity loan?
A HELOC (Home Equity Line of Credit) is a revolving credit line secured by your home equity, similar to a credit card but with much lower interest rates. Unlike a home equity loan (which provides a lump sum at a fixed rate), a HELOC lets you draw funds as needed during a draw period (typically 5-10 years), paying interest only on the amount borrowed. After the draw period ends, you enter the repayment period (10-20 years) where you pay back both principal and interest. HELOCs typically have variable interest rates tied to the prime rate, while home equity loans have fixed rates. A HELOC offers more flexibility for ongoing projects or expenses with uncertain total costs, while a home equity loan is better for a one-time large expense with a known amount.
How is my available HELOC amount calculated?
Your available HELOC amount is determined by your home equity and the lender combined loan-to-value (CLTV) limit. Most lenders allow a maximum CLTV of 80-90%, meaning your mortgage balance plus HELOC cannot exceed this percentage of your home value. The formula is: Available HELOC = (Home Value x CLTV Limit) - Mortgage Balance. For example, with a $400,000 home, $250,000 mortgage, and 85% CLTV limit: Available = ($400,000 x 0.85) - $250,000 = $90,000. Your actual approved amount also depends on credit score (typically 680+ required), debt-to-income ratio (usually under 43%), income verification, and the property appraisal. Some lenders offer up to 90% or even 95% CLTV for well-qualified borrowers.
What happens during the draw period of a HELOC?
During the draw period (typically 5-10 years), you can borrow from your HELOC up to the approved credit limit, repay some or all of the borrowed amount, and borrow again as needed. Most HELOCs require only interest payments during this period, which keeps monthly payments low but means you are not reducing the principal balance. You can access funds through HELOC checks, a linked debit card, or online transfers. Some lenders allow you to convert portions of your variable-rate HELOC balance to fixed-rate loans during the draw period. At the end of the draw period, you can no longer access additional funds, and the outstanding balance transitions to the repayment period with higher monthly payments that include both principal and interest.
How do variable interest rates affect HELOC payments?
HELOC interest rates are typically variable, tied to the prime rate plus a margin set by your lender. When the Federal Reserve raises or lowers the federal funds rate, the prime rate follows, directly affecting your HELOC rate. For example, if your HELOC rate is prime + 1.5% and the prime rate is 8.50%, your rate would be 10.0%. A 1% rate increase on a $50,000 HELOC balance increases your interest-only payment by approximately $42 per month. Over the life of the loan, rate fluctuations can significantly impact total interest paid. Some HELOCs offer introductory rates, rate caps (limiting how much the rate can increase per adjustment and over the loan lifetime), or the option to lock portions of the balance at a fixed rate.
What are the tax implications of a HELOC?
Since the Tax Cuts and Jobs Act of 2017, HELOC interest is only tax-deductible if the funds are used to buy, build, or substantially improve the home securing the loan. Interest on HELOC funds used for debt consolidation, education, vacations, or other purposes is no longer deductible. The deduction is limited to interest on total mortgage debt (including HELOC) up to $750,000 for loans originated after December 15, 2017. For example, if you take a $50,000 HELOC at 8.5% to renovate your kitchen, the approximately $4,250 annual interest may be deductible, saving roughly $1,000 in taxes at the 24% bracket. However, using the same HELOC to pay off credit card debt would not qualify for the deduction. Consult a tax advisor for your specific situation.
When is a HELOC a better choice than a cash-out refinance?
A HELOC is typically better when you need flexible access to funds over time (like phased home renovations), when your current mortgage rate is lower than available refinance rates (keeping your low-rate mortgage intact), when you need a smaller amount relative to your home value, or when you want to minimize closing costs. Cash-out refinancing typically costs 2-5% of the loan amount in closing costs, while HELOC closing costs are much lower or sometimes waived. However, a cash-out refinance may be better when you need a large lump sum, want a fixed interest rate, or can refinance to a lower rate than your current mortgage. If current mortgage rates exceed your existing rate by 1% or more, a HELOC preserves your favorable existing mortgage terms while still accessing equity.