What Is the Monthly Payment on a $500,000 Home Equity Loan?
FACT-CHECKEDFACT-CHECKEDThe monthly payment on a $500,000 home equity loan runs roughly $4,000 to $4,600 a month at today's rates on a 15- or 20-year term, and that's on top of your existing mortgage payment. A home equity loan is a second lien, which changes the rate, the qualifying math, and whether a lender will let you borrow that much at all.
Key Takeaways
- A home equity loan is a second lien, so you owe two separate monthly payments.
- Combined loan-to-value is the qualifying math that decides if $500,000 is even available to you.
- A fixed rate on a home equity loan typically runs above your first-mortgage rate.
- Interest is only tax-deductible when proceeds improve the home itself.
- Total interest paid over the term matters more than the payment alone.
The Second-Lien Reframe
A lot of homeowners hear "home equity loan" and picture a slightly smaller version of their first mortgage. Structurally, it works differently: when you take out a home equity loan, you're layering a second, separate obligation on top of the mortgage you already have. The Consumer Financial Protection Bureau describes this plainly: a home equity loan is disbursed as a lump sum, typically carries a fixed interest rate, and uses your home equity as collateral. When a primary mortgage already exists, that loan functions as a second mortgage, and you will make payments on both loans at the same time.
That second-position status is the whole reason the payment picture looks different from a $500,000 first mortgage. The lender holding the second lien gets paid after the first-mortgage lender in a default scenario, so the pricing typically reflects that added risk. Borrowers I've worked with over the years have often assumed the home equity rate would track close to their existing mortgage rate. It usually doesn't. A fixed-rate home equity loan tends to price above the prevailing first-mortgage rate, and if you're sizing this loan, that gap is one of the first things to build into your monthly math rather than discover later.
What $500,000 Actually Costs Per Month
Since no single home equity rate applies to every borrower, the clearest way to see the payment range is to run the amortization math at a few illustrative rates and terms. The numbers below are for illustration only, anchored to Freddie Mac's Primary Mortgage Market Survey, where the most recent weekly survey put the average 30-year fixed rate around 7.4%, up from about 6.95% a month earlier. Home equity loan pricing on a second lien typically sits above this first-mortgage benchmark.
Using standard fixed-rate amortization on $500,000, the illustrative payments look like this:
| Illustrative rate | Term | Monthly payment | Total interest over the term |
|---|---|---|---|
| 7.40% | 20 years | About $3,997 | About $459,400 |
| 7.40% | 15 years | About $4,607 | About $329,200 |
| 8.40% (one point higher) | 20 years | About $4,308 | About $533,800 |
| 6.40% (one point lower) | 10 years | About $5,652 | About $178,200 |
Shortening the term always raises the monthly payment and lowers the total interest paid. Lengthening the term does the opposite. Neither move is automatically right. The correct choice depends on what the rest of your monthly budget, including your first mortgage, can absorb without creating payment shock, which is what you're actually trying to avoid here. Payment shock is the jump in your monthly obligations that catches a household off guard, and it's the number that should drive your term selection more than the headline rate.
The Real Gatekeeper: Combined Loan-to-Value
Before you can shop payment amounts, there's a qualifying question that decides whether $500,000 is even on the table. Fannie Mae's Selling Guide lays out the mechanism lenders use: combined loan-to-value, or CLTV, is calculated by adding your existing mortgage balance to the new home equity loan amount, then dividing that total by your home's appraised value. Lenders use this ratio to size how much equity access you can actually get.
Run the math yourself before getting attached to a number. Say your home appraises at $1,200,000 and your existing mortgage balance is $500,000. Adding a $500,000 home equity loan brings your combined balance to $1,000,000, which is roughly 83% of value. Whether that clears underwriting depends on your lender's specific CLTV limit, which varies by program and isn't a figure to assume in advance. What's consistent across lenders is the direction of the math: the more you already owe on the first mortgage, the less room is left for a home equity loan, no matter how much your home is worth on paper.
People often jump straight to comparing rates before running this math. Both the CLTV question and the rate question matter, but CLTV determines whether you have an application worth pricing at all, which makes it the one to answer first for anyone eyeing a loan this size.
Two Payments, One Household Budget
Because a home equity loan is legally a second mortgage, CFPB guidance is direct that you're taking on payments on both loans simultaneously. That matters for how a lender evaluates your file. Your debt-to-income calculation has to account for the full obligation, meaning your existing mortgage payment plus the new home equity payment, plus whatever other debt you're carrying on cars, credit cards, or personal loans.
You might mentally separate these into different buckets: your mortgage, your new loan, and your credit cards. Each bucket on its own can look manageable, but the total monthly cash leaving your household across all of them is the number that determines whether the loan fits your life. Before locking in a $500,000 request, add up every payment you'd be carrying afterward, including your current obligations, and compare that total against your actual monthly income rather than against what a lender's minimum qualifying ratio allows.
Fixed Rate, Deductibility, and the True Cost of Borrowing
Two more factors change what that monthly number really costs you. First, CFPB guidance describes a home equity loan as usually carrying a fixed rate and a lump-sum disbursement, which is different from a HELOC's typical adjustable rate and revolving structure. That fixed structure is exactly why an amortization table like the one above is a fair way to plan. Your payment on a home equity loan won't move the way a variable-rate HELOC draw payment can.
Second, the IRS is specific about when the interest on that payment even helps you at tax time. Under Publication 936, mortgage interest is deductible only on acquisition debt, meaning funds used to buy, build, or substantially improve the home securing the loan, up to $750,000 in aggregate acquisition debt under the current rule. If your $500,000 home equity loan pays off credit cards, covers tuition, or funds anything other than home improvement, that interest isn't deductible. That single fact changes the after-tax cost of the payment, so weigh it alongside the interest rate itself when you're sizing the loan.
The CFPB also notes that home equity loans may carry upfront fees and costs, so the true cost of borrowing includes more than the monthly figure. Compare total repayment, meaning every dollar of interest and fees over the life of the loan, against the payment that shows up on a single month's statement. That total-cost lens tends to hold up better than chasing the lowest advertised rate. At AmeriSave, our loan officers walk you through that full picture, including how a second lien interacts with an existing mortgage, before recommending a structure.
Choosing Between a Home Equity Loan and Other Options
If you want access to $500,000 in equity, you shouldn't automatically default to a home equity loan. If the money is already spent, meaning contractors are hired or bills are already coming due, a fixed-rate option like a home equity loan or cash-out refinance usually wins because you're committing to amortize that balance regardless. If your plan is still an idea with nothing finite locked in, a revolving line can mean paying interest only on what you actually draw. The size of your existing first mortgage matters too. Refinancing an entire $600,000 first mortgage just to access a small second draw rarely pencils out the same way a standalone home equity loan does at a larger amount like $500,000.
Whatever structure you land on, the objective stays the same. A small monthly payment that drags on for years and a short term that strains your budget are both worth avoiding, and neither one matters in isolation from the loans you already have. The option that fits best is the one that balances payment size against total interest without ignoring the rest of your financial picture. An AmeriSave loan officer can run the CLTV and payment math on your own numbers before you commit to a request.
Freddie Mac. Primary Mortgage Market Survey (PMMS).
Consumer Financial Protection Bureau. What is a home equity loan?
Consumer Financial Protection Bureau. What is the difference between a Home Equity Loan and a Home Equity Line of Credit (HELOC)?
Fannie Mae. Selling Guide B2-1.2-02, Combined Loan-to-Value (CLTV) Ratios.
Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction.
Internal Revenue Service. Real estate (taxes, mortgage interest, points, other property expenses) frequently asked questions.
Jon brings extensive experience in loan origination, sales leadership, and operations to AmeriSave, based in Waikiki, HI. Starting as a Loan Originator, he was promoted to Manager after 13 months and to VP eight months later, eventually managing 330 direct reports and establishing AmeriSave's Spanish lending channel. Married with three children, he specializes in transparent, technology-enabled lending that prioritizes client relationships and consumer empowerment.
Frequently Asked Questions
No. A home equity loan taken out while a primary mortgage already exists is a second mortgage, as CFPB guidance explains. You'll owe payments on both loans at the same time, and the home equity loan is priced and underwritten in second position behind your existing mortgage, which typically means a higher rate than your first mortgage carries. The amortization is also usually shorter: a $500,000 first mortgage is commonly spread over 30 years, while a home equity loan of the same size tends to run 10 to 20 years, so the monthly payment on the second lien can be larger than the payment on a first mortgage of the same amount.
Combined loan-to-value is the primary gate. Under Fannie Mae's Selling Guide definition, lenders add your existing mortgage balance to the requested home equity loan amount, then divide by your home's appraised value. The lower your existing mortgage balance relative to home value, the more room typically exists for a large home equity loan, though specific limits vary by lender and program. On a $1,200,000 home with a $500,000 first mortgage, adding $500,000 brings CLTV to roughly 83%, which is above the 80% ceiling many lenders apply, so you'd need more value, a smaller request, or a program with a higher CLTV allowance.
CFPB guidance describes home equity loans as typically carrying a fixed interest rate with funds disbursed as a lump sum. That differs from a home equity line of credit, which typically carries an adjustable rate and revolving access. The fixed structure is why a home equity loan payment stays level for the life of the loan, and why the amortization math in this article holds: once the rate and term are set at closing, the payment on a $500,000 balance is the same in year ten as in month one. If you'd rather borrow in stages and pay interest only on what you've drawn, a HELOC fits better, but you give up that payment certainty.
Only under specific conditions. IRS Publication 936 allows the deduction when the loan proceeds go toward buying, building, or substantially improving the home securing the debt, and total acquisition debt stays within the current $750,000 aggregate cap, or $375,000 if you're married filing separately. If you use the funds for other purposes, such as debt consolidation or tuition, that interest isn't deductible however the loan is labeled. The cap matters at this loan size: a $500,000 home equity loan stacked on a $500,000 first mortgage is $1,000,000 of secured debt, so even with a qualifying use, only the interest on the first $750,000 would qualify. Confirm the allocation with a tax professional.
A shorter term spreads the same $500,000 balance over fewer payments, so each one is larger, but you'll pay less total interest over the life of the loan. A longer term lowers the monthly payment while increasing total interest paid. The right choice depends on what your full monthly budget, including your existing mortgage, can absorb without creating payment shock.
Yes. CFPB notes that home equity loans may carry upfront fees and costs in addition to the interest rate, and those typically include an appraisal, title work, recording charges, and lender origination fees. If you compare loan offers on the monthly payment alone, you can miss meaningful differences in total borrowing cost, so ask for the full cost breakdown on the Loan Estimate before comparing options. Figures on a Loan Estimate can still change before closing if your circumstances change, so compare the final Closing Disclosure against it line by line.
It depends on how committed your spending plan already is and how large your existing first mortgage is. If your funds are already earmarked for a specific cost, a fixed-rate option like a home equity loan is often the better fit. If your plans are still undecided, a revolving line lets you pay interest only on what you draw. Run the combined loan-to-value math first, since it determines what's even available to you.