HELOC Interest Calculator

HELOC Interest-Only Calculator

A Home Equity Line of Credit (HELOC) interest-only calculator is a simple, useful tool to help you budget for the costs of borrowing against your HELOC.





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  • Key Points
  • •   A HELOC lets homeowners borrow against built-up home equity and often comes with relatively low interest rates.
  • •   Using an interest-only calculator can help you estimate your monthly payments during the draw period so you can decide how much you can afford to borrow.
  • •   During the draw period, some HELOCs let you pay interest only, but payments will increase significantly during the repayment period when principal is also due.
  • •   To qualify for a HELOC, lenders review your credit score, income, and employment history, and most will let you borrow up to 85% of your home’s value minus what you still owe.
  • •   The interest-only calculator can help you decide whether a HELOC fits your budget.

What Is a HELOC Interest-Only Calculator?

An interest-only HELOC calculator allows you to estimate the cost of paying interest on your HELOC during the period when you’re paying only interest (and no principal), which is known as the draw period. You can also see what your monthly payments will be after the draw period, when you’re paying both principal and interest.

What Is a HELOC?

A HELOC is a financial product that gives you access to a line of credit based on the equity you’ve built in your home over time. HELOCs are often available at relatively low interest rates. If you have adequate income to make both a mortgage payment and a HELOC payment, you can have both a HELOC and a home mortgage loan.

How to Use the HELOC Interest-Only Calculator

This HELOC calculator can help you gain a deeper insight into the overall cost of your credit line. To use it, simply enter the amount of your HELOC that you have used so far, the HELOC’s term in years, and the interest rate expressed as an APR. The calculator assumes you’ll make payments monthly.

Using the information you provide, the calculator will estimate your monthly interest-only payment.

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Why Calculate Monthly Payments With a HELOC Interest-Only Calculator?

Some HELOCs allow you to pay only interest during the draw period, with payments against the principal kicking in later during the repayment period. This arrangement can allow borrowers access to cash at a low upfront cost, but it can lead to much larger payments of both principal and interest later on.

This calculator helps you see how much your interest-only payment amounts to. If you were a first-time homebuyer when you purchased your home and you’ve never had a HELOC before, this can be especially helpful.

However, it’s important to understand that your payment amount may increase substantially during the HELOC’s repayment period. Many HELOCs come with a variable interest rate, so your rate — and therefore your payments — may change over time.

Benefits of Using a HELOC Interest-Only Calculator

A HELOC interest-only calculator shows how much your interest-only payments will cost each month, which can help you figure out whether you can afford to take out a HELOC, much like a mortgage calculator or home affordability calculator can help you determine your budget for buying a home.

If you already have a HELOC, the calculator can help you determine how much you can comfortably afford to draw on your credit line before interest costs strain your budget.

Benefits of a HELOC

Because HELOCs offer borrowers access to cash at a relatively low cost, homeowners commonly use them to fund home renovations or improvements. Interest paid on funds borrowed from a HELOC for these purposes is potentially tax-deductible. Please consult your tax advisor.

When repaid diligently, a HELOC may help boost your credit score over time. Unlike many other forms of borrowing against home equity, a HELOC lets you take out only what you need, which may help you avoid overborrowing and paying more interest than necessary.

HELOC Requirements

To qualify for a HELOC, you must own a home and have built up equity in it — which is to say, you must own some portion of your home’s value. For example, if your house is worth $300,000 and you still owe $200,000 toward your mortgage principal, you probably have about $100,000 in equity, though this may vary depending on your mortgage’s specific amortization schedule.

When you take out a HELOC, the lender will review your credit score, income, employment history, and other financial factors that are part of a lending decision. The process is similar to qualifying for a mortgage. Most lenders will allow you to borrow up to 85% of what your home is worth, minus the amount you still owe.

HELOC Process

You can begin the HELOC process with most lenders online. You’ll answer questions about your financial standing and the property or properties that you’re borrowing against. Once you fill out the application, a company representative will contact you and walk you through the remaining steps of the preapproval process. This is a lot like the underwriting process for most types of mortgage loans and may involve a physical inspection or appraisal of your property.

Once your lender has approved your application and offered their terms, you’ll decide whether or not to accept the HELOC and sign the documentation. You can then draw from the HELOC during the draw period, which is usually up to 10 years long. The repayment period comes next and may be up to 20 years.

HELOC Example

Say your home is worth $500,000 and you own $300,000 worth of its equity. You choose to take out $150,000 against its value in a HELOC. Over the course of the HELOC, you’ll pay back the portion of the $150,000 you used, plus any interest accrued over the draw and repayment periods. Keep in mind that if you opt for an interest-only draw period, your payments during the repayment period will likely be substantially larger.

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Tips on HELOCs

To successfully apply for a HELOC, make sure you’re in good financial standing. If you have high levels of outstanding debt or a poor credit score, you may not qualify for a HELOC, or you may only qualify for a high interest rate. The process of applying for a HELOC is similar to applying for a mortgage or a mortgage refinance.

Consider the purpose of the HELOC. While some projects, such as home improvement, may be worth the debt, funding a wedding or vacation might not make financial sense in the long run. A HELOC isn’t the only option if you need to borrow against your home — a home loan help center can help you explore your choices.

The Takeaway

A HELOC can be a relatively low-cost way for homeowners to access the equity they’ve built as cash. To understand how much you might need to pay each month in interest, it helps to use a HELOC interest-only calculator.

²SoFi Bank, N.A. NMLS #696891 (Member FDIC), offers loans directly or we may assist you in obtaining a loan from SpringEQ, a state licensed lender, NMLS #1464945.
All loan terms, fees, and rates may vary based upon your individual financial and personal circumstances and state.
You should consider and discuss with your loan officer whether a Cash Out Refinance, Home Equity Loan or a Home Equity Line of Credit is appropriate. Please note that the SoFi member discount does not apply to Home Equity Loans or Lines of Credit not originated by SoFi Bank. Terms and conditions will apply. Before you apply, please note that not all products are offered in all states, and all loans are subject to eligibility restrictions and limitations, including requirements related to loan applicant’s credit, income, property, and a minimum loan amount. Lowest rates are reserved for the most creditworthy borrowers. Products, rates, benefits, terms, and conditions are subject to change without notice. Learn more at SoFi.com/eligibility-criteria. Information current as of 06/27/24.
In the event SoFi serves as broker to Spring EQ for your loan, SoFi will be paid a fee.

Unlock your home’s value with a home equity line of credit from SoFi, brokered through Spring EQ.

FAQ

How do you calculate an interest-only payment on a HELOC?

Given how complex interest calculations can be, the best way to calculate an interest-only HELOC payment is to utilize an interest-only HELOC calculator, which will do the math for you.

Is it better to pay interest only on a HELOC?

Not necessarily. While interest-only payments may make money from a HELOC more accessible in the short term, it’s important to understand that during the repayment period, those payments will dramatically increase. To lower your overall HELOC costs, consider paying down principal throughout the HELOC’s lifetime.

How do you calculate an interest-only payment?

Interest-only payment calculations depend on the amortization schedule. Your lender may provide you with a full amortization schedule, but an interest-only calculator can quickly give you a good estimate.


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SoFi loans are originated by SoFi Bank, N.A., NMLS #696891 (Member FDIC). For additional product-specific legal and licensing information, see SoFi.com/legal. Equal Housing Lender.

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Terms, conditions, and state restrictions apply. Not all products are available in all states. See SoFi.com/eligibility-criteria for more information.

*SoFi requires Private Mortgage Insurance (PMI) for conforming home loans with a loan-to-value (LTV) ratio greater than 80%. As little as 3% down payments are for qualifying first-time homebuyers only. 5% minimum applies to other borrowers. Other loan types may require different fees or insurance (e.g., VA funding fee, FHA Mortgage Insurance Premiums, etc.). Loan requirements may vary depending on your down payment amount, and minimum down payment varies by loan type.

Financial Tips & Strategies: The tips provided on this website are of a general nature and do not take into account your specific objectives, financial situation, and needs. You should always consider their appropriateness given your own circumstances.

Tax Information: This article provides general background information only and is not intended to serve as legal or tax advice or as a substitute for legal counsel. You should consult your own attorney and/or tax advisor if you have a question requiring legal or tax advice.

²SoFi Bank, N.A. NMLS #696891 (Member FDIC), offers loans directly or we may assist you in obtaining a loan from SpringEQ, a state licensed lender, NMLS #1464945.
All loan terms, fees, and rates may vary based upon your individual financial and personal circumstances and state.
You should consider and discuss with your loan officer whether a Cash Out Refinance, Home Equity Loan or a Home Equity Line of Credit is appropriate. Please note that the SoFi member discount does not apply to Home Equity Loans or Lines of Credit not originated by SoFi Bank. Terms and conditions will apply. Before you apply, please note that not all products are offered in all states, and all loans are subject to eligibility restrictions and limitations, including requirements related to loan applicant’s credit, income, property, and a minimum loan amount. Lowest rates are reserved for the most creditworthy borrowers. Products, rates, benefits, terms, and conditions are subject to change without notice. Learn more at SoFi.com/eligibility-criteria. Information current as of 06/27/24.
In the event SoFi serves as broker to Spring EQ for your loan, SoFi will be paid a fee.

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