What determines your HELOC borrowing limit

The amount you can borrow through a HELOC depends on three things your lender calculates: how much your home is worth, how much you still owe on your mortgage, and your credit profile. Lenders typically let you borrow between 80 and 90 percent of your home's current value, minus what you owe. So if your home is worth $300,000 and you owe $150,000 on your mortgage, a lender using an 85 percent threshold would let you borrow up to about $105,000 through a HELOC (85% of $300,000 = $255,000, minus $150,000 owed = $105,000 available).

Your credit score, income, and debt-to-income ratio also matter. A lender will pull your credit report and verify your income to make sure you can actually repay what you borrow. Someone with a 750 credit score and stable income will usually get a higher limit than someone with a 650 score and irregular income, even if both own homes of equal value. Some lenders also set a floor — they may not offer a HELOC smaller than $25,000 or $50,000, which means a home with very little equity may not may have access to at all.

Key Takeaways

  • Most lenders calculate your maximum HELOC by taking 80 to 90 percent of your home's value and subtracting what you owe on your mortgage.
  • Your credit score, income, and existing debts all affect how much a lender will actually offer you, even if the math says you have more equity available.
  • The home value used is usually an appraisal or automated valuation the lender orders, not your purchase price or what you think it is worth.
  • Lenders often set minimum HELOC amounts, so homes with small amounts of equity may not may have access to for a line of credit at all.

How lenders measure your home's value

Lenders do not use your purchase price or your own estimate. They order an appraisal or use an automated valuation model (AVM) — a computer estimate based on recent sales of similar homes in your area. An appraisal costs $300 to $500 and takes one to two weeks. An AVM is faster and cheaper but less precise. Some lenders use an AVM first and only order a full appraisal if you are borrowing a large amount or if the AVM seems off.

The value they arrive at directly changes your borrowing limit. If an appraisal comes back lower than you expected, your maximum HELOC shrinks. If it comes back higher, your limit grows. This is why two homeowners on the same street with identical mortgages might get different HELOC offers — their homes may have appraised at different values, or one may have made recent renovations that increased the appraisal.

How your credit score and income affect your offer

Even if the math says you have $100,000 in available equity, a lender may offer you only $50,000 if your credit score is below 650 or your debt-to-income ratio is already high. Lenders want to see that you can handle the new monthly payment without defaulting. If you carry $3,000 in monthly debt payments and earn $5,000 a month, your debt-to-income ratio is 60 percent — most lenders want to see 43 percent or lower before they approve a HELOC.

Your income does not have to be from a W-2 job. Self-employed people, retirees, and people with rental income can all get HELOCs, but lenders will ask for tax returns, bank statements, or other proof. Recent job changes, gaps in employment, or a drop in income can slow down approval or reduce your offer. Lenders typically want to see at least two years of stable income history.

The difference between your credit limit and what you actually draw

Your credit limit is the maximum you are allowed to borrow. Your draw is what you actually take out. A lender might approve you for a $100,000 HELOC, but you do not have to use all of it. You can draw $10,000 now, $25,000 in six months, and leave the rest untouched. You only pay interest on the money you actually borrow, not on the full credit limit.

This is one reason a HELOC can be useful for people who are not sure exactly how much they need to spend. You get approved for a large amount, but you can draw slowly as you need the money. However, keep in mind that during the draw period (usually 5 to 10 years), your lender can freeze or reduce your credit limit if your home value drops sharply, your credit score falls, or the economy enters a recession. After the draw period ends, you move into the repayment period, when you can no longer draw new money and must pay back what you borrowed.

Why your offer might be lower than you expect

Lenders are more cautious now than they were before 2008. Most will not lend you more than 80 to 85 percent of your home's value, even if you have perfect credit. Some lenders are even more conservative and cap HELOCs at 75 percent. This cushion protects the lender if your home value drops — they want to make sure the home is still worth more than what you owe if they have to foreclose.

Your lender may also reduce your offer if you have recent late payments, high credit card balances, or other signs of financial stress. A bankruptcy or foreclosure within the last seven years will disqualify you from most lenders, though some credit unions or portfolio lenders (lenders who keep loans on their own books rather than selling them) may work with you after three to five years.

How to find out your actual borrowing limit

The only way to know for certain is to contact lenders and ask for a pre-qualification or pre-approval. This is free and does not lock you into anything. The lender will ask about your home value, mortgage balance, credit score, income, and debts. Some lenders let you start this process online; others require a phone call. Within a few days, they will give you a range — for example, "You may be able to borrow between $50,000 and $75,000."

If you want a more precise number, you can request a full pre-approval, which includes a property appraisal or AVM. This takes longer but gives you a firm offer. Keep in mind that pre-approvals are usually good for 60 to 90 days. If you do not close within that window and your credit or home value changes, the lender may revise the offer.

Comparing offers from different lenders

Different lenders use different formulas. One might offer you 85 percent of your home's value; another might offer 80 percent. One might use a higher appraisal than another. One might have stricter credit requirements. Getting quotes from at least two or three lenders — a bank, a credit union, and an online lender — can show you the range of what is actually available to you.

When you compare, look at the credit limit offered, the interest rate, the draw period length, and any fees (appraisal, annual, or origination). A higher credit limit is not always better if it comes with a higher rate or longer repayment period. Some lenders also offer a lower introductory rate for the first year or two, which can make the early payments cheaper but will reset later.

Frequently Asked Questions

Can I get a HELOC if I have less than 20 percent equity in my home?

Yes, but your options are limited. Some lenders will work with 10 to 15 percent equity, though the credit limit will be smaller and the interest rate higher. Many lenders have a minimum equity requirement of 15 or 20 percent, so you may need to contact several before finding one that will work with you.

What if my home value dropped since I bought it?

Your HELOC limit is based on current value, not purchase price. If your home is now worth less than what you owe, you have negative equity and cannot get a HELOC. If you have some equity but less than before, your borrowing limit will be lower than it would have been at the higher value.

Does paying off my mortgage increase my HELOC limit?

Yes. Your available equity is your home's value minus what you owe. If you pay down your mortgage, you owe less, so your available equity grows. If you pay off the mortgage entirely, your entire home value becomes available equity (up to the lender's maximum, usually 80 to 90 percent).

Can I increase my HELOC limit after I open it?

Yes. If your home value increases or you pay down your mortgage, you can ask your lender for a higher credit limit. Some lenders will do a quick review; others may order a new appraisal. There is usually no fee to request an increase, but the lender can say no if your credit or income has declined.

What happens to my HELOC if I sell my home?

The HELOC must be paid off at closing. The sale proceeds go to pay off your mortgage first, then your HELOC, then any other liens. If there is not enough money to pay off the HELOC in full, you will owe the remaining balance to the lender even after you sell.