Your borrowing limit depends on your home's equity and your lender's rules

A HELOC (home equity line of credit) lets you borrow up to a percentage of the equity you have built in your home. Most lenders will let you borrow between 80% and 90% of your home's total value, minus what you still owe on your mortgage. So if your home is worth $300,000 and you owe $200,000 on your mortgage, you have $100,000 in equity. A lender offering 80% of home value would let you borrow up to $40,000 through a HELOC (80% of $300,000 is $240,000, minus the $200,000 you owe).

The exact amount varies by lender, your credit score, your income, and how stable your employment looks. Some lenders are more conservative and cap HELOCs at 75% of home value; others go to 90%. Your bank or credit union will run the numbers and tell you a specific maximum before you commit to anything.

Key Takeaways

  • Most lenders let you borrow 80% to 90% of your home's value, minus what you owe on your mortgage.
  • Your credit score, income, and employment history affect how much a lender will offer you.
  • You do not have to borrow the full amount available — you can draw only what you need.
  • The amount you can borrow may be lower if you have other debts or if your home's value has dropped.

How lenders calculate your maximum HELOC amount

Lenders start with your home's current market value, which they find through an appraisal or an automated valuation model. They then explore their loan-to-value ratio — typically 80% or 85% — to get the total amount they would lend against your home. From that number, they subtract your outstanding mortgage balance. The result is your maximum HELOC amount.

Example: Your home appraises at $400,000. Your lender uses an 85% loan-to-value ratio. You owe $250,000 on your mortgage. The math works like this: $400,000 × 0.85 = $340,000. Then $340,000 − $250,000 = $90,000 maximum HELOC.

If you have other debts — car loans, personal loans, credit cards with high balances — the lender may reduce your maximum. They look at your total monthly debt payments and compare them to your gross monthly income. If your debt-to-income ratio is too high, they will lower the HELOC amount or deny you altogether.

What happens if your home's value drops

If your home loses value after you open a HELOC, your lender may reduce the amount you can borrow. This happened to many homeowners during the 2008 housing crisis, when lenders froze or cut HELOC limits as property values fell. Some lenders will not reduce an existing HELOC, but others will, especially if you have not drawn on it yet.

If you already have an open HELOC and your home's value drops significantly, contact your lender to understand their policy. Some will let you keep the full amount; others will send you a notice that your credit line has been reduced. This is one reason to draw on a HELOC early if you think you might need it — once the money is in your account, the lender cannot take it back.

Credit score and income requirements

Most lenders require a credit score of at least 620 to 640 to open a HELOC, though many prefer 700 or higher. A higher score usually means a lower interest rate and a higher borrowing limit. If your score is below 620, you may not be able to get a HELOC at all, or you will face a much smaller limit.

Lenders also want to see steady income. They will ask for recent pay stubs, tax returns, and sometimes bank statements to verify you can make payments. Self-employed borrowers often need two years of tax returns. If you have been at your job for less than two years, some lenders will still work with you, but others will not. Gaps in employment or frequent job changes can lower the amount you are offered.

The difference between your credit limit and what you actually borrow

Your HELOC credit limit is the maximum you can borrow, but you do not have to use it all. You only pay interest on the money you actually draw. During the draw period — usually 5 to 10 years — you can borrow, repay, and borrow again, like a credit card. You might have a $50,000 limit but only draw $15,000 in the first year. You pay interest only on that $15,000.

This flexibility is one reason people prefer HELOCs to home equity loans, which give you a lump sum all at once. With a HELOC, you can open the line, leave it untouched, and use it only if you need it. Some lenders charge an annual fee to keep the account open even if you do not borrow anything, so read the terms carefully.

How to find out your specific borrowing limit

The only way to know your exact maximum is to contact lenders directly. You can start with your current bank or credit union, since they already know your financial history. You can also shop around — different lenders have different standards, and one may offer you more than another.

When you contact a lender, ask them to give you a pre-qualification estimate. This usually involves a soft credit check, which does not hurt your credit score. The lender will ask about your home's value, your mortgage balance, your income, and your debts. Within a day or two, they can tell you a rough range of what you might borrow. If you want to move forward, they will order a full appraisal and run a hard credit check, which does show on your credit report.

Frequently Asked Questions

Can I borrow more than 90% of my home's value?

Most mainstream lenders cap HELOCs at 80% to 90% of home value. Some specialty lenders go higher, but they typically charge much higher interest rates and fees. Borrowing more than 90% of your home's value is risky because you have little cushion if the market drops.

What if I owe more on my mortgage than my home is worth?

If you are underwater — meaning your mortgage balance exceeds your home's value — you cannot open a HELOC. Lenders will not lend against negative equity. You would need to pay down your mortgage or wait for your home's value to rise before a HELOC becomes an option.

Does my HELOC limit stay the same forever?

No. Lenders can reduce or freeze your HELOC if your home's value drops, if your credit score falls, or if your income declines. They can also reduce it if you miss payments or if economic conditions change. Some lenders review accounts annually and adjust limits accordingly.

Can I increase my HELOC limit after I open it?

Yes. If your home's value rises or your financial situation improves, you can ask your lender to increase your credit line. They will run a new appraisal and credit check. Some lenders increase limits automatically over time if you have a good payment history.

What if I have a second mortgage — does that reduce my HELOC amount?

Yes. A second mortgage is another lien on your home, and lenders subtract it from your available equity just as they do with your first mortgage. If you have a first mortgage of $200,000 and a second mortgage of $30,000 on a $350,000 home, your available equity is $120,000, not $150,000.