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Finance Calc Kit
Mortgages

Home Equity Loan Calculator

Calculate your home equity loan monthly payments, total interest, and amortization schedule. Estimate your maximum borrowing amount based on home value and LTV ratio.

Home equity loan terms

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Common amounts:
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Rate presets:
years
Standard terms:
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Equity & borrowing capacity check

Determine your maximum allowable home equity loan based on your home value and lender CLTV limit.

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$
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Current total home equity:$200,000.00
Current first mortgage LTV:50.0%
Maximum borrowing limit:$120,000.00
Projected CLTV with loan:62.5%

Fixed monthly payment (P&I)

$492.37

Equal monthly installments for 180 months (15 yrs) at fixed 8.5% APR

Total interest

$38,626.56

Total payments

$88,626.56

Closing costs (2.0%)

$1,000.00

Net cash proceeds

$49,000.00

Payment breakdown

  • Principal$50,000.0056.4%
  • Total interest$38,626.5643.6%

How this home equity loan is calculated

Standard fixed-rate amortization and lending guidelines determine your monthly payment and capacity.

  1. Maximum borrowing capacity & CLTV limit

    Max Loan=(Home Value×Max CLTV)−First Mortgage\mathrm{Max\ Loan} = (\mathrm{Home\ Value} \times \mathrm{Max\ CLTV}) - \mathrm{First\ Mortgage}

    At an appraised value of $400,000 and an allowable 80% CLTV limit, your maximum combined allowable debt is $320,000. Subtracting your existing first mortgage of $200,000 leaves a maximum potential loan of $120,000.00.

  2. Equal monthly installment formula (P&I)

    M=P×r(1+r)n(1+r)n−1M = P \times \frac{r(1 + r)^{n}}{(1 + r)^{n} - 1}

    For a principal of $50,000 at an annual rate of 8.5% (monthly rate r = 0.007083) across 180 monthly payments, the fully amortizing installment is $492.37.

  3. Total loan cost & financing charges

    Total Interest=(M×n)−P\mathrm{Total\ Interest} = (M \times n) - P

    Multiplying your monthly payment of $492.37 by 180 payments equals total payments of $88,626.56, yielding lifetime interest of $38,626.56.

  4. Net cash proceeds after estimated fees

    Net Proceeds=P−Closing Costs\mathrm{Net\ Proceeds} = P - \mathrm{Closing\ Costs}

    Estimated closing fees of 2.0% ($1,000) subtracted from the $50,000 principal yield net cash in hand of $49,000.00.

Payment schedule

Year-by-year totals. Open a year to see each month.

PeriodPaymentPrincipalInterestBalance
$5,908.44$1,724.60$4,183.84$48,275.40
$5,908.44$1,877.04$4,031.40$46,398.37
$5,908.44$2,042.95$3,865.49$44,355.42
$5,908.44$2,223.53$3,684.91$42,131.89
$5,908.44$2,420.07$3,488.37$39,711.82
$5,908.44$2,633.98$3,274.46$37,077.84
$5,908.44$2,866.80$3,041.64$34,211.05
$5,908.44$3,120.20$2,788.24$31,090.85
$5,908.44$3,395.99$2,512.44$27,694.85
$5,908.44$3,696.17$2,212.27$23,998.69
$5,908.44$4,022.88$1,885.56$19,975.81
$5,908.44$4,378.46$1,529.97$15,597.35
$5,908.44$4,765.48$1,142.96$10,831.87
$5,908.44$5,186.70$721.73$5,645.16
$5,908.44$5,645.16$263.28$0.00
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Understanding Home Equity Loans (Second Mortgages)

A home equity loan, commonly called a second mortgage, is a closed-end installment loan secured by the equity accumulated in your residential property. The lender disburses a single lump sum of cash upfront, which you repay over a fixed schedule through equal monthly installments of principal and interest.

Unlike credit cards or personal loans, a home equity loan is secured by real estate, which usually allows borrowers to secure significantly lower interest rates and higher borrowing limits. However, because your home serves as collateral, failure to maintain payments puts your ownership at risk. Evaluating your exact monthly commitment, lifetime financing fees, and equity cushion is crucial before taking on a secondary lien.

Homeowners evaluating equity financing often compare fixed second mortgages against revolving credit lines. If your funding requirements are spread over several years rather than needed all at once, explore our HELOC calculator to see how interest-only draw periods operate. Alternatively, if your current first mortgage carries an elevated interest rate that you want to replace entirely while extracting cash, use our cash out refinance calculator to evaluate a single new primary lien.

How Borrowing Capacity and CLTV Are Determined

Lenders establish your maximum borrowing power using your home current market appraisal, your outstanding first mortgage balance, and their Combined Loan-to-Value (CLTV) limit. Most financial institutions cap allowable CLTV at 80% to 85%, leaving at least a 15% to 20% equity safety buffer in your home. To measure how much your property has gained in value since purchase and model your long-term equity growth, use our housing appreciation calculator.

Max Loan Amount=(Home Value×Max CLTV)−First Mortgage Balance\mathrm{Max\ Loan\ Amount} = (\mathrm{Home\ Value} \times \mathrm{Max\ CLTV}) - \mathrm{First\ Mortgage\ Balance}

For instance, if your property appraises at $400,000 and your primary mortgage balance is $200,000, an 80% maximum CLTV policy permits up to $320,000 in total mortgage encumbrances ($400,000 multiplied by 0.80). Subtracting your $200,000 first mortgage leaves a maximum potential home equity loan of $120,000.

Underwriters also evaluate your debt obligations to verify that your monthly income can comfortably absorb both your primary mortgage and the new second mortgage payment. You can verify your qualification ratios in advance using our debt to income calculator.

Home Equity Loan vs. HELOC vs. Cash-Out Refinance

Selecting the right equity extraction strategy depends on your timeline, risk tolerance, and prevailing interest rates. Each mechanism presents distinct structural trade-offs:

FeatureHome Equity LoanHELOCCash-Out Refinance
DisbursementSingle lump sum at closingRevolving draw as neededLump sum after paying off old loan
Interest RateFixed for full termVariable (pegged to Prime)Fixed or adjustable
Monthly PaymentPredictable equal installmentsInterest-only then amortizingSingle new consolidated payment
First Mortgage ImpactLeaves existing rate untouchedLeaves existing rate untouchedReplaces entire existing loan
Best Used ForFixed-cost renovations, major debtOngoing or emergency expensesLowering overall mortgage rate

Preserving a low existing first mortgage rate is one of the strongest arguments for choosing a second mortgage over refinancing. If your primary mortgage carries a sub-4% fixed rate, replacing it through a cash-out refinance at current market rates could dramatically inflate your overall borrowing cost. You can calculate your combined effective borrowing cost across both liens with our blended rate calculator.

Mathematical Formulas and Worked Example

A home equity loan is amortized as an installment annuity. The equal monthly payment is calculated using the standard reducing-balance amortization formula:

M=P×r(1+r)n(1+r)n−1M = P \times \frac{r(1 + r)^{n}}{(1 + r)^{n} - 1}

In this equation, M is the monthly payment, P is the principal loan amount, r is the monthly interest rate (annual interest rate divided by 12 and by 100), and n is the total number of monthly payments (loan term in years multiplied by 12).

If the interest rate is zero percent, the monthly installment simplifies to principal divided by total months:

M=PnM = \frac{P}{n}

Detailed Worked Calculation

Consider a homeowner with the following profile:

  • Home appraisal value: $400,000
  • First mortgage balance: $200,000
  • Lender maximum allowable CLTV: 80% ($320,000 allowable debt ceiling)
  • Home equity loan requested: $50,000
  • Fixed interest rate: 8.5% APR
  • Repayment tenure: 15 years (180 monthly payments)
  • Estimated closing costs: 2.0% ($1,000)

Step 1: Compute the monthly interest rate:

r=0.08512≈0.00708333r = \frac{0.085}{12} \approx 0.00708333

Step 2: Calculate the compounding factor for 180 months:

(1+r)180=(1+0.085/12)180≈3.567825(1 + r)^{180} = (1 + 0.085/12)^{180} \approx 3.567825

Step 3: Solve for the monthly principal and interest installment:

M=50,000×0.00708333×3.5678253.567825−1≈$492.37M = 50{,}000 \times \frac{0.00708333 \times 3.567825}{3.567825 - 1} \approx \$492.37

Step 4: Compute the total loan payments and total lifetime interest:

Total Payments=492.37×180=$88,626.56\mathrm{Total\ Payments} = 492.37 \times 180 = \$88{,}626.56
Total Interest=$88,626.56−$50,000=$38,626.56\mathrm{Total\ Interest} = \$88{,}626.56 - \$50{,}000 = \$38{,}626.56

Subtracting the 2% closing costs ($1,000) provides net cash proceeds in hand of $49,000. Your combined debt totals $250,000 ($200,000 first mortgage + $50,000 second mortgage), resulting in a projected CLTV of 62.5% and leaving $150,000 of protective equity in your residence. To see how small extra principal payments accelerate your payoff date, model your custom timeline in our amortization calculator.

Strategic Uses, Closing Costs, and Tax Considerations

Because home equity loans disburse upfront capital at fixed rates, they are most effectively deployed for high-impact, one-time expenditures:

  • Capital Home Improvements: Remodeling kitchens, replacing roofs, or expanding living space directly enhances property value. Under current IRS regulations, mortgage interest paid on second mortgages may be tax-deductible if the borrowed funds are utilized exclusively to buy, build, or substantially improve the home securing the loan.
  • High-Interest Debt Consolidation: Replacing credit card balances at 20% to 25% APR with a home equity loan at 8% to 9% can generate thousands of dollars in interest savings and streamline multiple monthly obligations into a single payment. You can analyze your overall interest savings with our debt consolidation calculator.
  • Closing Costs & Fees: Lenders typically assess closing expenses ranging from 2% to 5% of the borrowed sum to cover appraisals, title searches, credit checks, and origination. Borrowers can either pay these fees out of pocket at settlement or deduct them from loan disbursements.

Frequently asked questions

What is the difference between a home equity loan and a HELOC?
A home equity loan provides a single lump-sum payout at a fixed interest rate with predictable equal monthly installments over a set term. A HELOC functions as a revolving line of credit with a variable interest rate, allowing you to draw and repay funds repeatedly during an initial draw period.
How much money can I borrow with a home equity loan?
Most lenders permit borrowing up to an 80% to 85% Combined Loan-to-Value (CLTV) limit. Your maximum loan equals your appraised property value multiplied by the lender CLTV percentage, minus your current outstanding primary mortgage balance.
What happens if property values decline after taking a home equity loan?
If local home values drop, your combined loan balance may exceed the market value of your property, placing you in negative equity (or underwater). Your required fixed monthly payments do not change, but you may face difficulty selling or refinancing until sufficient principal is paid down.
Is home equity loan interest tax-deductible?
Under the Tax Cuts and Jobs Act, interest on second mortgages is generally tax-deductible only if the borrowed funds are used to buy, build, or substantially improve the home that secures the loan, and subject to overall mortgage interest caps. Using proceeds for personal spending or non-housing debt does not qualify.
What credit score and income are needed to qualify?
Most conventional lenders require a minimum FICO credit score of 620 to 680, at least 15% to 20% retained home equity, documented reliable income, and a total debt-to-income (DTI) ratio typically at or below 43%.
Can I pay off my home equity loan early?
Yes, most lenders permit early principal prepayment. However, always review your loan agreement beforehand to confirm that your lender does not impose an early payoff penalty or prepayment clause within the first two or three years.

Resources and references

The formulas and methods in this calculator were checked against these independent sources.