Renovation Financing Calculator

Compare financing options for your renovation. Calculate monthly payments, total interest, and see how your home equity affects borrowing power for HELOCs and home equity loans.

Results

Visualization

How It Works

This calculator shows monthly payments and total interest for renovation financing. It compares home equity loan rates to personal loan rates and checks whether your equity level qualifies you for a HELOC, which typically offers lower rates.

The Formula

Monthly Payment = P x [r(1+r)^n] / [(1+r)^n - 1], where P = loan amount, r = monthly interest rate, n = total payments. Total Interest = (Monthly Payment x n) - P.

Variables

  • Loan Amount — How much you need to borrow for your renovation project
  • Interest Rate — Annual percentage rate; home equity loans typically 6-9%, personal loans 10-18%
  • Term — Repayment period in years; longer terms mean lower payments but more total interest
  • Home Equity % — Your equity percentage; need 20%+ to qualify for HELOC, which offers the lowest rates

Worked Example

Borrowing $50,000 at 7.5% for 10 years: monthly payment = $593.51. Total paid = $71,221. Total interest = $21,221 (42% of the loan amount). A personal loan at 12.5% would cost $36,836 in interest, so using home equity saves $15,615.

Practical Tips

  • Home equity loans and HELOCs typically offer rates 3-8% lower than personal loans or credit cards
  • Interest on home equity loans used for home improvements may be tax-deductible (consult a tax advisor)
  • Shorter loan terms cost more per month but save thousands in total interest over the life of the loan
  • A HELOC works like a credit card with a draw period; only borrow what you need when you need it
  • Compare at least 3 lenders; rates and fees vary significantly between banks, credit unions, and online lenders

Frequently Asked Questions

What is the difference between a HELOC and a home equity loan?

A home equity loan gives you a lump sum with fixed monthly payments. A HELOC is a revolving credit line you draw from as needed, usually with a variable rate. Both use your home as collateral.

How much equity do I need to borrow against my home?

Most lenders require at least 15-20% equity remaining after the loan. For example, with 40% equity on a $400,000 home ($160,000 equity), you could potentially borrow up to $80,000-$100,000.

Is renovation financing tax deductible?

Interest on home equity loans and HELOCs used to buy, build, or substantially improve your home may be deductible up to $750,000 of total mortgage debt (2025 tax law). Personal loan interest is not deductible.

Should I use savings or a loan for my renovation?

If you have sufficient savings and an emergency fund, paying cash avoids interest. But if rates are low and you can invest your cash at higher returns, financing may make sense mathematically.

What credit score do I need for a home improvement loan?

Home equity products typically require 660+. Best rates go to 740+. Personal loans are available with lower scores (580+) but at significantly higher rates.

Last updated: March 20, 2026 · Reviewed by the RemodCalcs Editorial Team