How to Calculate Your Home Equity for Borrowing

Understand the simple steps to determine your home's equity, a key figure for accessing loans like HELOCs or cash-out refinances.

By Garret Merkley · Explainer · Aug 21, 2026

Branched from How to Use a Home Equity Line of Credit (HELOC) for Renovations and Major Expenses

Quick take

Home equity is the difference between your home's market value and your outstanding mortgage debt.
Lenders typically allow you to borrow against a portion of your equity, often capped by Loan-to-Value (LTV) ratios.
A professional appraisal provides the most accurate home value for borrowing purposes.
Regularly checking your equity helps you understand your financial position and borrowing potential.

Home equity is the portion of your home that you truly own, free and clear of debt. It's a straightforward calculation: your home's current market value minus the total amount you still owe on your mortgage(s). For borrowing purposes, this equity represents the collateral you have available to secure loans like a Home Equity Line of Credit (HELOC) or a cash-out refinance.

Step 1: Determine Your Home's Current Market Value

The first step is to get a realistic estimate of what your home would sell for today. You can start with online valuation tools, but for any formal borrowing, lenders will almost always require a professional home appraisal. An appraiser will evaluate your home's condition, features, recent comparable sales in your area, and local market trends to provide an unbiased, official valuation.

Step 2: Calculate Your Total Outstanding Mortgage Debt

This step is usually simpler. Gather your latest mortgage statements to find the exact principal balance owed on your primary mortgage. If you have a second mortgage, a Home Equity Line of Credit (HELOC), or any other loans secured by your home, you'll need to include those outstanding balances as well. Add all these amounts together to get your total outstanding debt.

Step 3: Perform the Basic Equity Calculation

Once you have your home's current market value and your total outstanding debt, you can calculate your raw home equity. The formula is: Current Market Value - Total Outstanding Mortgage Debt = Home Equity. This figure represents the total value you have built up in your home.

Step 4: Understand Borrowable Equity (Loan-to-Value Ratio)

While you might have a certain amount of total equity, lenders typically won't let you borrow against 100% of it. They use a metric called the Loan-to-Value (LTV) ratio to assess risk. This ratio compares the amount of the loan you're seeking (plus any existing mortgages) to your home's appraised value. For products like HELOCs or cash-out refinances, lenders commonly cap the combined LTV (CLTV) at 80% or 85%. This means your maximum borrowable amount is usually 80-85% of your home's value, minus your existing mortgage balance.

Knowing your home equity is fundamental if you're considering using your home as a financial tool. It directly tells you how much money you might be able to access for significant expenses, such as home renovations, consolidating high-interest debt, or funding education. Understanding your equity also provides a clear picture of your household's financial health and how your biggest asset is performing over time, especially as market values fluctuate and you pay down your mortgage principal.

Key Factors Affecting Your Equity

**Market Value Changes:** Local housing market trends, supply and demand, and economic conditions directly impact your home's value.
**Mortgage Payments:** Each payment you make reduces your principal balance, directly increasing your equity over time.
**Home Improvements:** Strategic renovations and upgrades can enhance your home's appeal and market value, thereby boosting your equity.

Do I always need a professional appraisal to calculate my equity?

For an initial estimate, you can use online tools. However, for any official borrowing against your home equity, lenders almost always require a professional appraisal to verify your home's current market value.

What happens to my equity if my home's value decreases?

If your home's market value drops, your equity decreases. This can reduce your available borrowing power and, in some cases, might lead to a lender freezing or reducing your HELOC if your Loan-to-Value (LTV) ratio exceeds their limits.

Is "borrowable equity" the same as "total equity"?

No. Total equity is the full amount you own outright in your home. Borrowable equity is the *portion* of that total equity that a lender is willing to let you access, typically capped by their LTV requirements (e.g., 80-85% of your home's value, minus existing mortgages).

How often should I check my home equity?

It's a good practice to check your home equity annually, or whenever you are considering a major financial decision that involves leveraging your home. Market conditions can change, and your mortgage balance steadily decreases.