The short answer
How much equity you can borrow depends on your home's value, what you still owe, and the lender's maximum CLTV (combined loan-to-value). To estimate it, multiply your home's value by the CLTV limit, then subtract your current mortgage balance. The result is the most a HELOC could typically be, subject to credit, income, and underwriting review.
“How much can I actually get?” is the first thing almost every homeowner asks me. It is the right question to start with, and the answer is more straightforward than most people expect. Once you understand one term, CLTV, you can run a solid estimate on the back of a napkin. Let’s walk through it together.
What is home equity?
Home equity is the difference between what your home is worth and what you still owe on it. If your home would sell for more than your mortgage balance, that gap is your equity. It grows as you pay down your loan and as your home’s value rises.
A simple way to picture it:
- Home value: what the property is worth today
- Minus your mortgage balance: what you still owe on all loans secured by the home
- Equals your equity: the portion of the home you own outright
Equity is not cash sitting in an account. It is value tied up in your property. A HELOC (a revolving line of credit secured by your home) is one way to access part of that value without selling. The CFPB’s HELOC overview explains the basics in neutral terms.
What is CLTV, and why does it matter?
CLTV, or combined loan-to-value, is the total of all loans on your home divided by the home’s value. Lenders use a maximum CLTV to decide how much total debt your property can carry. Your first mortgage plus your new HELOC cannot go above that ceiling.
I want you to understand the why behind it. Lenders leave some equity untouched as a cushion. That cushion protects both you and the lender if home values shift or if the property ever has to be sold. The CLTV limit is how that cushion gets built into the math.
Here is how CLTV is calculated:
CLTV = (First mortgage balance + HELOC line amount) / Home value
Every program sets its own maximum, and those limits can change when a new rate sheet comes out. Current program limits are listed in Terms at a Glance.
How do I calculate how much I can borrow?
Multiply your home’s value by the program’s maximum CLTV, then subtract what you currently owe. The number left over is the largest line you could typically be offered, before credit, income, and underwriting are considered. It is a ceiling, not a promise.
Here’s the move, step by step:
- Estimate your home’s value. Use a recent appraisal, comparable sales, or a reasonable estimate.
- Find the current maximum CLTV in Terms at a Glance.
- Multiply your home value by that CLTV percentage.
- Subtract your current mortgage balance (and any other loan secured by the home).
- The result is your estimated maximum line amount.
An illustrative example
These are round, hypothetical numbers for illustration only. They are not an offer and do not reflect current program limits.
Example only: If a home is worth $400,000 and the limit were 80% CLTV, the most total debt the home could carry would be $320,000 ($400,000 x 0.80). If the owner still owes $220,000 on the first mortgage, the estimated maximum HELOC would be $100,000 ($320,000 minus $220,000).
Here is the same idea with a few different balances, using the same hypothetical $400,000 value and example 80% limit:
| Current mortgage balance | Max total debt (example) | Estimated max HELOC (example) |
|---|---|---|
| $150,000 | $320,000 | $170,000 |
| $220,000 | $320,000 | $100,000 |
| $300,000 | $320,000 | $20,000 |
| $330,000 | $320,000 | $0 (already above the example limit) |
Notice the last row. If you already owe more than the CLTV ceiling allows, there is no room for a HELOC under that program, even if you still have some equity on paper.
What else affects how much I can borrow?
Equity sets the ceiling, but it is not the only factor. Your credit profile, income, existing monthly debts, property type, and occupancy can all affect the line amount and pricing you are offered. Final numbers are always subject to underwriting review.
A few things that commonly come into play:
- Credit profile. Your score and history may affect both the line amount and the rate. My HELOC credit score guide covers this in more detail.
- Debt-to-income ratio (DTI). DTI is your total monthly debt payments divided by your gross monthly income. Lenders use it to make sure the new payment fits your budget.
- Occupancy. A primary residence, second home, and rental property are often treated differently, with different limits.
- Property type. Single-family homes, condos, and multi-unit properties may each have their own rules.
- Valuation. The value underwriting uses may differ from an online estimate.
- Minimum and maximum line sizes. Programs typically have both, and those are also listed in Terms at a Glance.
Does living in Georgia or Alabama change anything?
The core math is the same everywhere: home value, times the CLTV limit, minus what you owe. What matters locally is that the property must be located in Georgia or Alabama, and that its value and title are confirmed as part of the process. Local market conditions can affect your home’s value.
Values can vary a lot from one part of the state to another, even between nearby neighborhoods. That is one reason an online estimate is a starting point, not a final number. You can learn more about how I work with homeowners in each state on the Georgia page and the Alabama page.
Is borrowing the maximum a good idea?
Not always. Just because you can access a certain amount does not mean you should use all of it. A good plan matches the line to a clear purpose and a payment you are comfortable with, even if the rate moves. Borrowing less keeps more equity in your home as a cushion.
Most HELOCs have a variable rate, which can rise or fall over time. Before you decide on an amount, think about what the payment would look like if rates went up. If you are weighing a HELOC against refinancing your whole mortgage, my HELOC vs. cash-out refinance guide breaks down the tradeoffs.
How do I get a real number for my home?
The fastest way is to plug your own details into an estimate. With your home value, current balance, and credit range, you can see an estimated line amount and payment in a few minutes, before you commit to anything.
Run the rate estimator to see estimated numbers for your home. If you would rather go over your situation with me, send me a message here. Let’s make sure we set this up correctly, so the number you plan around is one you can count on.
Sources
This guide is general education, not a loan offer or commitment to lend. Programs, rates, and terms are subject to change and to underwriting review. Available for properties in Georgia and Alabama only.
