Home Equity Loan Calculator

Calculate the monthly payment and total interest on a fixed-rate home equity loan, and compare it against typical HELOC pricing.

Home Equity Loan Summary

Monthly Payment

$492

Fixed · 15 yr · 8.5%

Total Interest

$38,627

44% of everything you pay

Loan amount$50,000
Total repaid$88,627
Payoff dateOctober 2041 (15 yr)

Loan Terms

Lump-sum amount, fixed rate, and term

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Home equity loans deliver the full amount at closing and amortize fully — the payment above never changes, unlike a variable-rate HELOC.

Term Comparison

Same $50,000 at 8.5% — shorter terms cost less overall

TermMonthly PaymentTotal InterestTotal Repaid
5 years$1,026$11,550$61,550
10 years$620$24,391$74,391
15 years (yours)$492$38,627$88,627
20 years$434$54,139$104,139
25 years$403$70,784$120,784
30 years$384$88,404$138,404

Loan vs Typical HELOC Rates

$50,000 over 15 years, amortized at each rate

RateMonthly PaymentTotal Interestvs Your 8.5% Quote
7.5%$464$33,431-$29/mo
8%$478$36,009-$15/mo
8.5% (your quote)$492$38,627—
9%$507$41,284+$15/mo
9.5%$522$43,980+$30/mo
10%$537$46,714+$45/mo

HELOC rates are variable (prime rate plus a lender margin) and their minimum payments are often interest-only during the draw — fine for flexibility, but the balance does not shrink. The rows above amortize fully at each rate so you can compare like for like; the HELOC calculator models the two-phase structure in detail.

Quick Answer

A home equity loan is a fixed-rate lump sum repaid in equal monthly installments. On $50,000 at 8.5% over 15 years, the payment is about $492.37 per month and total interest runs about $38,627. Because the rate is fixed — unlike a variable-rate HELOC — the payment never changes, which makes budgeting simple and shields you if rates rise.

Key Facts

  • A home equity loan is one lump sum at closing — unlike a HELOC, you cannot re-borrow what you repay
  • The rate and monthly payment are fixed for the entire term, so rising market rates never change your cost
  • It is a second mortgage secured by your home; missing payments puts the home at risk of foreclosure
  • Shorter terms save a lot of interest: $50k at 8.5% costs ~$38,627 over 15 years but ~$24,391 over 10
  • Most lenders want combined loan-to-value (first mortgage + equity loan) under 80-90% of home value
  • Interest may be tax-deductible when the funds buy, build, or substantially improve the home — ask a tax pro

Frequently Asked Questions

Home equity loans use the standard fully amortizing installment formula: Payment = P × r × (1+r)^n ÷ ((1+r)^n − 1), where P is the amount borrowed, r is the monthly rate (annual rate ÷ 12), and n is the term in months. On $50,000 at 8.5% over 15 years, that works out to about $492.37 per month — every payment is identical, and the loan is fully paid off at month 180.

A home equity loan pays you one lump sum at a fixed rate with one fixed payment — best when you know exactly how much you need. A HELOC is a revolving variable-rate line: during a draw period (commonly 10 years) you borrow and repay flexibly, often interest-only, then the balance amortizes in a repayment phase. The loan gives certainty; the HELOC gives flexibility — usually at the cost of rate risk.

At 8.5% over 15 years, about $38,627 in total interest ($492.37 × 180 = $88,627 repaid). Term length matters more than small rate differences: 10 years costs about $24,391 in interest at $619.93/month, while 20 years drops the payment to $433.91 but raises interest to about $54,139. Use the calculator to test your exact quote.

Typically yes, slightly. Home equity loans sit in second lien position, so lenders charge a modest premium over comparable first-mortgage rates. The trade-off is the fixed rate: HELOC rates float monthly with the prime rate plus a margin, so a HELOC that looks cheaper today can get more expensive quickly. Compare real quotes for both using the rate table above.

Most lenders cap combined loan-to-value — your first mortgage balance plus the equity loan — at 80-90% of the home appraised value. On a $400,000 home with a $250,000 mortgage, an 85% cap leaves about $90,000 of available equity ($400,000 × 0.85 − $250,000). Lenders also weigh credit score and debt-to-income, so the actual limit can be lower.

Formula:Payment = P × r × (1+r)^n ÷ ((1+r)^n − 1)

How this works

Calculations are run entirely in your browser. No inputs are sent to our servers and no account is required. Formulas follow standard US definitions from the IRS and the CFPB where applicable; international users should confirm local tax and regulatory rules apply.

What this tool can’t do

When to consult a professional

This is a software engineering tool, not financial advice. Run the math here, then take the result to a certified financial planner, CPA, or your bank before making a decision that materially affects your money.

Sources

  1. [1]
    Consumer Financial Protection Bureau (CFPB)
    Official sourceconsumerfinance.govAccessed Apr 21, 2026

    US consumer finance regulator; authoritative on mortgage disclosures, APR rules, credit cards.

Joseph Orduna
Founder & Software Engineer

Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).