"How Much Can I Borrow With a HELOC?"

The valuation comes back at $520,000. Your mortgage statement says you still owe $310,000. The difference is $210,000, and by the time you finish reading the statement, part of that money already has a kitchen in it. Then the lender's answer comes back smaller, and it helps to see exactly where the rest went.

The most you can borrow with a HELOC is your home's value multiplied by the lender's maximum combined loan-to-value, minus what you still owe on your first mortgage. The lender then checks that your income can carry a qualifying payment on the line, and some lenders figure that payment on the whole line, including the part you never plan to draw.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, licensed in fifteen states, NMLS #483943, through C2 Financial Corporation. Below is the arithmetic, the four things that move a lender's maximum up or down, and the actual limits from the second mortgage lenders I work with (a HELOC is a second mortgage when it comes behind your first). Each number carries the date of its sheet, so you can see how current it is.

If you are still deciding between a line of credit, a lump-sum second mortgage and a cash-out refinance, second mortgages and HELOCs explained walks through that choice, and how a fast online HELOC works covers the application itself.

The math behind a HELOC limit

Three numbers decide the ceiling.

Your home's value. For a line of credit this often comes from a computer valuation rather than an appraiser's visit. Quorum's HELOC matrix dated May 1, 2026 uses an automated valuation on lines under $400,000 and a full appraisal above that. Angel Oak's matrix dated May 8, 2026 draws the same line at $400,000 and also orders a full appraisal whenever the combined loan-to-value goes above 80%. How an appraisal works covers that visit.

Your first mortgage balance. The number on your most recent statement.

The lender's maximum combined loan-to-value. Combined loan-to-value, or CLTV, is the total of every mortgage on the home divided by the home's value. A first mortgage of $310,000 plus a $50,000 line on a $520,000 home is a CLTV of about 69%. Each lender publishes its own maximum.

The CFPB's HELOC booklet, in its January 2014 edition, describes the method plainly. Many lenders set the credit limit on a home equity line by taking a percentage of the home's appraised value and subtracting the balance owed on the existing mortgage. Its example uses 75% of a $100,000 home, minus a $40,000 mortgage, for a potential line of $35,000.

The formula, on the home from the opening:

Home value                              $520,000
Lender's maximum CLTV                       80%
Maximum total of all mortgages          $416,000
Your first mortgage balance            -$310,000
                                        --------
Room for a line of credit               $106,000

Same home, same balance, and a lender whose maximum is 90% would leave $158,000 of room.

Four things that lower a lender's maximum CLTV

A lender's maximum CLTV is a table with several rows rather than one number. The riskier the file looks to the lender (a lower score, a bigger line, a home you do not live in, a property with more units), the lower the maximum CLTV on the row you land on.

Your credit score

Quorum's HELOC matrix dated May 1, 2026 allows up to 95% CLTV on a one-unit primary residence with a 720 or higher score, 90% at 680 to 719, and 80% at 640 to 679. Angel Oak's matrix dated May 8, 2026 runs its full-documentation HELOC on a primary residence at 90% CLTV with a 760 score, 85% at 720, and 75% at 680 or 660.

On the $520,000 home above with a $310,000 balance, 95% CLTV leaves $184,000 of room and 80% leaves $106,000, a $78,000 difference between two rows of the same table. Score boundaries work the same way on a first mortgage, as your credit score and your mortgage rate explains.

The size of the line

A bigger line gets a lower ceiling. Quorum's sheet caps the line at $750,000 when the CLTV is under 65%, and at $500,000 once the CLTV goes above 65%, for scores of 680 and up. Scores of 660 to 679 top out at $200,000, and 640 to 659 at $100,000. Angel Oak allows a $750,000 line only at 75% CLTV with a 720 score, while its 90% CLTV row stops at $500,000. The smallest line Angel Oak will open is $125,000, and the smallest at Quorum is $25,000.

Whether you live in the home

On both sheets, the home you live in gets the most room. On Angel Oak's sheet, a second home or an investment property is limited to 80% CLTV with a 720 score and 75% with a 700, with the line capped at $400,000. Quorum's HELOC allows a second home at 90% CLTV with a 680 score and does not take investment properties. Its separate investment HELOC, on the same May 1, 2026 product snapshot, stops at 80% CLTV and a $250,000 line.

The type of property

Angel Oak lists single-family homes, townhomes, two-unit properties and warrantable condominiums as eligible, so a three- or four-unit property is outside that program. Quorum takes one- to four-unit properties but steps the ceiling down: 90% on a two-unit primary residence with a 680 score, and 75% on a three- or four-unit.

The full credit limit can count, even if you never draw it

A line of credit has two numbers: the credit limit, and the amount you have drawn. Luxury Mortgage's Simple Seconds guidelines, version 3.0 dated May 12, 2026, use the credit limit for the CLTV test: the CLTV ratio is calculated "by dividing the total of all liens (First Mortgage Loan Amount + all subordinate financing, including the credit limit of any Home Equity Lines of Credit regardless of amount drawn) by the value to be utilized for the transaction."

Under that rule, a $150,000 line you plan to use $40,000 of still has to fit inside the CLTV maximum at the full $150,000, and an existing HELOC with a zero balance counts at its full limit.

Some lines require a draw at closing. Angel Oak's HELOC requires a minimum initial draw of 80% of the line, and Quorum's sheet says no draw is required at closing. Section 1026.40 of Regulation Z requires the lender to disclose any minimum draw requirement in the disclosures it gives you with the application.

Your income still has to carry the line

The CLTV table tells you the most the lender could lend on the home, and your debt-to-income ratio (DTI), your monthly debt payments divided by your gross monthly income, tells you whether your income can carry a line that size.

Lenders qualify you on a payment larger than the interest-only payment Angel Oak and Quorum charge during the draw period. Quorum's sheet uses a principal and interest payment at the prevailing rate, paid off over a 20-year term. Angel Oak's sheet says the DTI is "calculated at start rate plus 2% of the maximum line over the repay period." Both produce a qualifying payment above what you would pay during the draw period, because the lender is testing whether you can afford the line once principal is due.

The ratio limits step down with credit too. Quorum uses two ratios: a housing ratio, which is your mortgage payments alone against your income, and a total debt ratio, which adds the rest of your monthly debts. It allows 43% and 45% with a score above 720, and 38% and 43% below it. Angel Oak allows a total DTI of 50% with a score of 700 or higher and 45% below that. It also requires at least $2,500 a month left over after your debts, rising to $3,500 when the DTI is over 45%. How debt-to-income works covers how the debts and the income are counted.

So your answer is the smaller of two numbers: the room the CLTV table leaves, and the line whose qualifying payment fits under the DTI limit.

Finding your own number

1. Your most recent mortgage statement. The balance is one of the three inputs, and the rate on it tells us whether a second mortgage or a cash-out refinance fits better.
2. A realistic value for the home. A recent sale on your street, a county assessment and an online estimate are all fine starting points.
3. Your credit score. Angel Oak uses the middle of your three bureau scores, and the primary wage earner's middle score when there is more than one client on the file. That score picks the row of the table.
4. How much of the line you will really use. A smaller line means a smaller qualifying payment, which is easier to fit under the DTI limit than a line sized to all of your equity.
5. Your monthly debts. The qualifying payment on the full line goes on top of them, and the total has to fit under the lender's ratio.

Common mistakes with HELOC amounts

Counting equity as room. Equity is value minus balance. Room is value times the lender's maximum CLTV minus balance, and the gap is the share of the home the lender requires you to keep.

Applying right after buying. Quorum requires six months of ownership and uses the lower of the purchase price or the appraised value before that. Angel Oak requires twelve months of ownership. A recent gain in value does not count yet.

Listing the home for sale and then applying. Angel Oak will not take a home that was listed for sale in the last six months. Quorum will, with the CLTV capped at 80%, once the listing comes down.

Sizing the line to the equity instead of the need. A line you will never fully use can push your DTI past the limit and cost you a smaller line that would have fit.

An example, with invented numbers

Numbers below are made up to show the mechanism. Marcus, his home, his lender and the lender's table are all invented, and nothing here is a quote.

Marcus lives in a single-family home. The lender's automated valuation puts it at $520,000, his first mortgage balance is $310,000, and his middle credit score is 735. The lender in this example allows 90% CLTV at his score on a primary residence.

Home value                              $520,000
Maximum CLTV at a 735 score                 90%
Maximum total of all mortgages          $468,000
First mortgage balance                 -$310,000
                                        --------
Room for a line of credit               $158,000

Marcus wants $120,000 for a renovation. The lender qualifies him on a principal and interest payment for the full $120,000 over a 20-year term, on top of his first mortgage, taxes, insurance and a car payment. If the total fits under the lender's ratio, the $120,000 line is approved. If it does not, the line gets smaller until it fits, even though the CLTV table left $158,000 of room.

At a 715 score, the same lender's 85% row would have left $132,000 of room, and on a second home the 80% row would have left $106,000.

The comparison across lenders

Every sheet above changes. With a HELOC question, I run your value, your balance and your score across the second mortgage lenders I work with and show you which one leaves the most room. That comparison is what a mortgage broker does that a single bank cannot.

Availability differs by lender and by state. Quorum's HELOC is not offered in Texas, Angel Oak does not offer its owner-occupied program there, and each lender keeps its own state list, so we confirm early which lenders can lend where your home is.

Your next step

The rate tool on this site prices first mortgages. It does not price a home equity line or a second mortgage, so for those I quote you directly. You are welcome to call me at (843) 765-0000 or email me at jeff@solverya.com. Please have your current mortgage statement, an idea of your home's value, and the amount you have in mind.

If the question is really whether to replace your first mortgage with a cash-out refinance instead of adding a second, the rate tool on the homepage can show you pricing for that scenario on your own time. You can choose a rate option that works best for you, and that selection can change later.

Nothing here is a loan approval, a denial or a commitment to lend. Lender limits, valuation methods and documentation rules vary by lender, by state and by file, which is why every sheet above carries its date.

Common questions

How much of my home's value can I borrow with a HELOC?

It depends on the lender's maximum combined loan-to-value and your credit score. On the sheets I work from, dated May 2026, the ceiling on a one-unit primary residence is as high as 95% of the home's value with a 720 or higher score. With a score in the 640s or 660s it is 75% or 80%. Your first mortgage balance comes off that total, and what is left is the most the line can be.

Does my credit score change how much I can borrow on a HELOC?

Yes. Lenders publish their maximum CLTV in rows by score. On Quorum's May 1, 2026 sheet the primary-residence maximum is 95% at 720 and above, 90% from 680 to 719, and 80% from 640 to 679, and the maximum line size drops at lower scores too.

Can I get a HELOC on a second home or an investment property?

Often, with less room. Angel Oak's May 8, 2026 matrix limits a second home or investment property to 80% CLTV with a 720 score, with a lower line cap than on the home you live in. Quorum's HELOC takes second homes at 90% CLTV with a 680 score, and its separate investment property HELOC stops at 80% CLTV with its own lower line cap. The line caps are in the section above on what lowers a lender's maximum CLTV. On both the Angel Oak and Quorum sheets, the home you live in gets the highest ceiling.

Does the lender count the whole line or only what I draw?

Often the whole line. Luxury Mortgage's Simple Seconds guidelines count the full credit limit of a home equity line in the combined loan-to-value test regardless of the amount drawn. Angel Oak's sheet figures the qualifying payment for your debt-to-income ratio on the maximum line.

Can a lender lower my HELOC limit after it is opened?

Yes, in limited situations. Under Regulation Z section 1026.40, a lender may stop additional draws or reduce the credit limit during any period in which the value of the home declines significantly below the appraised value used for the line.