Two Ways Your Equity Grows
Home equity grows through two independent forces working simultaneously:
- Mortgage paydown. Every monthly payment reduces your loan balance, directly increasing your equity by that principal amount. In the early years of a 30-year mortgage, paydown is slow — most of each payment is interest. It accelerates significantly in the later years.
- Home appreciation. As your home's market value rises, your equity rises by the same dollar amount. A 3.5% annual appreciation on a $400,000 home adds roughly $14,000 in equity in year one alone — often more than a full year of mortgage paydown in the early stages.
The chart above shows how these two forces combine: the home value line rises while the mortgage balance line falls. The gap between them — which widens over time — is your equity.
How Much Can You Borrow Against Your Equity?
This calculator assumes you can borrow up to 80% of your home's value across all loans combined, the combined loan-to-value (CLTV) limit. The formula is:
Available to borrow = (Home value × 80%) − Current mortgage balance
That 80% figure is a conservative benchmark. Many HELOC and home equity lenders allow up to 85% combined, and some go to 90% for well-qualified borrowers. A cash-out refinance on a primary home is capped at 80% for conventional and FHA loans. If you already owe close to your lender's cap, you will need more equity before you can borrow.
Home Equity Loan vs. HELOC
There are two main ways to borrow against equity without selling:
- Home equity loan. A lump sum at a fixed interest rate, repaid over a set term (typically 5–30 years). Best for one-time expenses like a renovation or debt consolidation.
- HELOC (Home Equity Line of Credit). A revolving line of credit you draw from as needed, usually at a variable rate. Best for ongoing expenses or projects where the total cost is uncertain. You only pay interest on what you draw.
Both use your home as collateral, meaning failure to repay could result in foreclosure. Borrow against equity only for purposes that improve your financial position.
LTV, PMI, and When PMI Goes Away
Your loan-to-value ratio (LTV) has direct financial consequences. An LTV above 80% on a conventional loan means you're paying private mortgage insurance (PMI) — often roughly 0.5–1.5% of the loan annually. Once your balance drops to 80% of the original purchase price, you can request PMI cancellation. Lenders are legally required to cancel it automatically at 78%. If your home has appreciated significantly, a new appraisal may allow you to reach 80% LTV sooner and request early removal.
Frequently Asked Questions
What is home equity?
Home equity is the portion of your home's value that you own outright — the difference between what your home is worth and what you still owe on your mortgage. If your home is worth $400,000 and you owe $280,000, your equity is $120,000, or 30% of the home's value.
How can I borrow against my home equity?
There are three main ways: a home equity loan (lump sum at a fixed rate), a HELOC (home equity line of credit, variable rate), or a cash-out refinance (replace your mortgage with a larger one). Home equity lenders commonly cap total borrowing at 80–85% of your home's value across all loans combined (combined loan-to-value, or CLTV); a conventional or FHA cash-out refinance is capped at 80%.
What is loan-to-value (LTV) ratio?
LTV is the ratio of your mortgage balance to your home's current market value, expressed as a percentage: LTV = (mortgage balance ÷ home value) × 100. On a conventional loan, an LTV above 80% usually means you're paying PMI. For a HELOC or home equity loan, lenders look at the combined LTV of all loans, commonly capped at 80–85%.
How does home equity grow over time?
Home equity grows in two ways: through mortgage paydown (each payment reduces your balance) and through home appreciation (as your home's value rises, so does your equity). In the early years of a mortgage, payments are mostly interest, so paydown is slow. Appreciation often drives more equity growth early on, while paydown accelerates in the later years of the loan.
When does PMI go away?
PMI is required when your LTV exceeds 80%. You can request cancellation once your balance drops to 80% of the original purchase price. Lenders are legally required to automatically cancel PMI at 78% of the original value. If your home has appreciated significantly, a new appraisal may let you reach 80% LTV sooner and request early removal.