Home Improvement Loan Calculator: Monthly Payment & Interest
Work out the monthly payment and total interest on a home improvement loan used to fund a renovation, repair, or upgrade.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year amortization schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Monthly payment | Total interest | Total of payments |
|---|---|---|---|
| $20k · 12.0% · 5-year | $444.89 | $6,693.34 | $26,693.34 |
| $10k · 13.5% · 3-year | $339.35 | $2,216.70 | $12,216.70 |
| $40k · 10.5% · 7-year | $674.43 | $16,651.86 | $56,651.86 |
| $7.5k · 15.0% · 2-year | $363.65 | $1,227.60 | $8,727.60 |
How This Calculator Works
Enter the amount you need for the project, the APR, and the repayment term. A home improvement loan is typically an unsecured personal loan: it is not tied to your home, so it funds quickly but is priced on your credit rather than your equity. The calculator produces a constant monthly payment and a full year-by-year breakdown.
The Formula
Fixed-Rate Amortization
P = loan amount, r = monthly rate (APR ÷ 12), n = number of monthly payments
Worked Example
Borrowing $20,000 for a renovation at 12% APR over 5 years gives a monthly payment of about $445. Across the loan you repay roughly $26,700, so interest adds close to $6,700 to the project's overall cost.
Key Insight
An unsecured home improvement loan funds fast and puts no lien on your house, but its rate is well above home-equity borrowing. For large projects, compare the total interest here against a home equity loan before deciding which is cheaper overall.
Frequently Asked Questions
Is a home improvement loan secured?
Usually not. Most home improvement loans are unsecured personal loans priced on your credit score and income, so they do not place a lien on your home.
How is it different from a home equity loan?
A home equity loan is secured by your house, offering a lower rate but a slower process and foreclosure risk. An unsecured home improvement loan is faster and lien-free but carries a higher rate.
What term should I choose?
Home improvement loans usually run one to twelve years. A shorter term raises the monthly payment but cuts total interest; match the term to how long the improvement will serve you.
Can I use it for any project?
Generally yes — renovations, repairs, new systems, or energy upgrades. Because the loan is unsecured, the lender rarely restricts the specific use of the funds.
Does the loan add value to my home?
The loan itself does not; the improvement might. Projects vary widely in how much value they return, so weigh the interest cost against the expected benefit.
Related Calculators
Data Sources & Benchmarks
This calculator draws on 3 independent, dated sources. The starting values for interest rate are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Payments use the standard fixed-rate amortization formula. The calculator assumes a fixed APR with no origination fee deducted from proceeds; where a fee is deducted, enter the amount actually received.
Written by Ugo Candido · Last updated May 17, 2026.