HELOC Calculator — Estimate Your Monthly Interest and Payments — USA 2026
Free HELOC calculator. Estimate monthly interest payments on your home equity line of credit. See how much equity you can borrow and compare HELOC vs home.
A HELOC lets homeowners borrow against their home equity at lower rates than credit cards or personal loans. HELOCs have two phases: a draw period (usually 10 years) where you pay interest only and a repayment period (usually 20 years) where you pay principal plus interest. Current HELOC rates of 7.5-9.5% are variable tied to Prime Rate making monthly costs fluctuate with rate changes.
How much can I borrow with a HELOC?
HELOC amount = (Home Value x 80-85%) - Existing Mortgage Balance. For a $500000 home with $300000 mortgage: ($500000 x 85%) - $300000 = $125000 maximum HELOC. Some lenders allow up to 90% LTV for excellent credit borrowers. Your credit score income and debt-to-income ratio also affect the approved amount and interest rate.
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HELOC Calculator
How This Calculator Works
This calculator uses the standard reducing balance method to compute your monthly payments. The formula takes your loan principal, annual interest rate, and tenure to calculate the exact Equated Monthly Installment (EMI) or payment amount. Each monthly payment consists of two components — principal repayment and interest charges. In the early months, a larger portion goes toward interest, but as your outstanding balance decreases, more of each payment reduces the principal. This is why making extra prepayments in the early years of your loan saves significantly more interest than prepaying later.
Tips to Get the Best Loan Deal
Always compare the Annual Percentage Rate (APR) rather than just the advertised interest rate, as APR includes processing fees, insurance charges, and other costs. Negotiate your processing fee — most banks will reduce or waive it if you ask. Choose the shortest tenure your budget allows since longer tenures dramatically increase total interest paid. Check prepayment terms before signing — RBI mandates zero prepayment penalty on floating rate home loans in India. Finally, maintain a credit score above 750 to qualify for the best rates from any lender.
Key Information
| Parameter | Details |
|---|---|
| Average HELOC Rate | 8% - 9.5% (variable 2026) |
| Draw Period | 5-10 years (interest only) |
| Repayment Period | 10-20 years (principal + interest) |
| Maximum LTV | 80% - 85% of home value |
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Use Calculator NowFrequently Asked Questions
How much can I borrow with a HELOC?
HELOC amount = (Home Value x 80-85%) - Existing Mortgage Balance. For a $500000 home with $300000 mortgage: ($500000 x 85%) - $300000 = $125000 maximum HELOC. Some lenders allow up to 90% LTV for excellent credit borrowers. Your credit score income and debt-to-income ratio also affect the approved amount and interest rate.
HELOC vs home equity loan which is better?
HELOCs offer flexibility with variable rates and draw-as-needed access ideal for ongoing expenses like renovations. Home equity loans provide lump-sum fixed-rate predictability better for one-time large expenses. HELOC rates average 0.5-1% higher but you only pay interest on what you draw. If you know the exact amount needed a fixed-rate home equity loan provides payment certainty.
Is HELOC interest tax deductible?
HELOC interest is tax deductible only if the funds are used to buy build or substantially improve the home securing the loan. Using HELOC funds for debt consolidation vacations or other purposes makes the interest non-deductible. The combined limit for mortgage and HELOC interest deductions is $750000 in total acquisition debt. Keep records of how HELOC funds are used.
What is PMI and when can I remove it?
Private Mortgage Insurance (PMI) is required when your down payment is less than 20% of the home price. PMI typically costs 0.5-1% of the loan amount annually and is added to your monthly payment. You can request PMI removal once your equity reaches 20% of the original home value, or it automatically drops at 22% equity.
How does a 30-year vs 15-year mortgage affect payments?
A 15-year mortgage has higher monthly payments but dramatically lower total interest. For a $300,000 loan at 6.5%, the 30-year option costs $1,896/month with $382,633 total interest, while the 15-year costs $2,613/month with only $170,389 total interest — saving you over $212,000. Choose 15-year if you can afford the higher payment.
What credit score do I need for a mortgage?
Conventional loans typically require a minimum score of 620, FHA loans accept 580 (or 500 with 10% down). A score above 740 qualifies you for the best rates. Each 20-point increase in your score can save 0.25% on your rate, which translates to thousands of dollars over the life of the loan.
How much down payment do I need to buy a house?
Conventional loans require 3-20% down. FHA loans accept as low as 3.5%. VA loans offer 0% down for eligible veterans. Putting less than 20% down means paying PMI. A larger down payment reduces your monthly payment, total interest, and may qualify you for better rates.
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Last updated: March 2026