How to Calculate Home Equity (and What You Can Do With It)
Home equity = current home value minus your outstanding mortgage balance. If your home is worth $400,000 and you owe $260,000, you have $140,000 in equity — representing a 35% equity stake.
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Home equity equals your home's current market value minus your outstanding mortgage balance (and any other liens). If your home is worth $400,000 and you owe $260,000, you have $140,000 in equity — a 35% equity stake. Equity builds from two sources: your mortgage payments reduce the loan balance, and home appreciation increases the market value.
How to calculate home equity
- Estimate current home value — use a recent Zillow/Redfin estimate as a proxy, or a comparative market analysis from a local agent. For precise purposes (like a HELOC application), a formal appraisal is required.
- Find your current mortgage balance — check your most recent mortgage statement or log in to your servicer's online portal. This is your outstanding principal balance.
- Subtract: Equity = Current home value − Mortgage balance
- Calculate your LTV ratio — Loan-to-Value = Mortgage balance ÷ Home value. At $260,000 balance on a $400,000 home: LTV = 65%. Lenders use LTV to determine how much you can borrow.
How equity builds over time: two components
Equity growth has two drivers that work together — and both are more powerful than most homeowners realise:
| Driver | Example (30-yr loan, $300k home) | Year 1 | Year 10 | Year 20 |
|---|---|---|---|---|
| Mortgage paydown (7%) | Principal portion of each payment | ~$3,000/yr | ~$8,000/yr | ~$15,000/yr |
| Home appreciation (3%/yr) | $300k home gaining value | ~$9,000 | ~$11,700 | ~$15,700 |
| Total equity gain | ~$12,000 | ~$19,700 | ~$30,700 |
In the early years, appreciation drives more equity growth than paydown (on a 30-year loan, the first several years are heavily interest-weighted). By year 15–20, paydown accelerates as the amortisation schedule shifts. Both forces are compounding — appreciation grows a larger base each year, and paydown accelerates as the balance falls.
What you can do with home equity
| Method | How it works | Best for | Key risk |
|---|---|---|---|
| HELOC | Revolving line of credit at variable rate | Ongoing projects, emergency liquidity | Variable rate rises with Fed |
| Home equity loan | Fixed-rate second mortgage, lump sum | One-time large expense | Adds second monthly payment |
| Cash-out refinance | Replace mortgage with larger one; take difference as cash | When current rate is close to market rate | Replaces entire mortgage at new rate |
| Sell the home | Realise equity at close (net proceeds) | Downsizing, relocating | Requires leaving the home |
Equity requirements for borrowing: the CLTV rule
Most lenders allow borrowing against equity up to a Combined Loan-to-Value (CLTV) of 80–85%. You must retain at least 15–20% equity after any new borrowing. This means:
- Home worth $500,000, mortgage $350,000 (70% LTV): at 85% CLTV cap, you can borrow up to $75,000 additional ($500,000 × 0.85 − $350,000).
- Home worth $500,000, mortgage $425,000 (85% LTV): essentially no HELOC borrowing available — you are at the limit already.
- Home worth $500,000, mortgage $200,000 (40% LTV): at 85% CLTV, up to $225,000 additional borrowing available.
Higher credit scores may allow 90% CLTV. The specific limit depends on the lender, your credit profile, and the property type.
Is home equity part of your net worth?
Yes. Net worth = total assets − total liabilities. Your home's current market value is an asset; your mortgage balance is a liability. The difference — equity — contributes to net worth. However, for retirement planning, track investable net worth (excluding home equity) separately: home equity requires selling to access, and most retirees prefer to age in place rather than liquidate housing.
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Authoritative sources
- Consumer Financial Protection Bureau — What Is Home Equity? — CFPB explanation of home equity, how it is calculated, and the different ways to access it through HELOCs, home equity loans, and cash-out refinances.
- Federal Reserve — Distributional Financial Accounts — The Fed's data on household real estate equity and mortgage liabilities by wealth percentile — context for where typical homeowners stand in equity building.
Key takeaways
- Home equity = current home value − outstanding mortgage balance. A $400,000 home with $260,000 remaining has $140,000 in equity (35% equity stake; 65% LTV).
- Equity builds from two sources: mortgage paydown (slowly in early years, accelerating later due to amortisation) and home appreciation (averages 3–4%/year nationally over long periods).
- Borrowing against equity requires retaining at least 15–20% (CLTV cap of 80–85%). Above that, HELOC or home equity loans are available at variable and fixed rates respectively.
- A cash-out refinance replaces your entire mortgage — if you have a low existing rate (3–4%), this strategy is expensive. A HELOC or home equity loan preserves your first mortgage rate.
- Home equity is a real asset and contributes to net worth, but it is illiquid. For financial planning, maintain a separate track for investable assets vs home equity.
- The most flexible way to access equity without committing to a fixed amount is a HELOC. The HELOC guide covers draw periods, repayment structure, rate risk, and when it is better than a cash-out refinance.
Frequently asked questions
How is home equity calculated?
Home equity = current market value of the home minus the outstanding mortgage balance (and any other liens). If your home is worth $420,000 and you owe $280,000, your equity is $140,000 — representing a 33.3% equity stake ($140k ÷ $420k). Equity builds through mortgage paydown and home appreciation.
How fast does home equity build?
Equity builds from two sources: (1) mortgage paydown — on a $300,000 30-year loan at 7%, you pay down approximately $3,000 in principal in year 1, growing to $8,000+ in year 10 as the amortisation schedule shifts more payment to principal; (2) appreciation — at 3–4% annual home price appreciation, a $300,000 home gains $9,000–$12,000/year in equity from rising values.
Can I access home equity without selling?
Yes, through three mechanisms: (1) HELOC — a revolving line of credit against equity, variable rate, typically up to 85% LTV; (2) home equity loan — a fixed-rate second mortgage against equity; (3) cash-out refinance — replace your existing mortgage with a larger one and take the difference as cash. All three use home equity as collateral and require sufficient equity.
How much equity do I need before I can borrow against my home?
Most lenders require you to retain at least 15–20% equity after the loan. Combined loan-to-value (CLTV) limits typically cap at 80–85%. If your home is worth $400,000 and you owe $300,000 (75% LTV), a lender allowing 85% CLTV would let you borrow up to $40,000 additional ($400,000 × 0.85 − $300,000). Higher credit scores may allow 90% CLTV.
Is home equity taxable?
Home equity itself is not taxable income — simply having or growing equity does not create a tax event. When you sell, you may owe capital gains tax on the profit above your cost basis, but the first $250,000 of gain is excluded for single filers ($500,000 for married), if you've lived in the home as your primary residence for 2+ of the last 5 years. Interest on HELOC and home equity loan borrowing may be deductible if the funds are used to buy, build, or substantially improve the home.
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