Construction Loan Calculator

Estimate your construction loan payments, down payment, and interest costs with ease.

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Launch Construction Loan Calculator

You're just a step away from using construction loan calculator. Fill out the quick setup form below to get started. Whether you're here to explore, create, manage, or solve — this experience is built to work seamlessly for you.

Construction Loan Calculator

Project Information:

$
If you do not own the property (or land), kindly provide the amount you intend to pay for its purchase.
$
What is the budget for your construction project?
$
If you do not own the property (or land), kindly provide the amount you intend to pay for its purchase.
months
What is the estimated time to complete the project in months?

$
This is the calculated required down payment to receive the loan.

$
This is the calculated loan amount for your project.

Loan Information

%
Enter the expected interest rate for your loan.

The first payment that covers only interest is figured by calculating the interest on the maximum loan amount and then deducting the expenses related to construction.

The last interest-only payment during the construction phase is calculated based on the highest loan amount.

The principal and interest payments for the rest of the loan term.

Explore Construction Loan Calculator

About Construction Loan Calculator

Planning a construction project—whether building your dream home or investing in property—requires serious financial planning. The Construction Loan Calculator is a powerful tool designed to help prospective homeowners and developers understand the real costs behind financing a new build.

With just a few simple inputs—like the land/property purchase price, construction budget, and estimated home value—this tool provides detailed financial projections. It calculates the required down payment, loan amount, and payment schedule, including initial interest-only payments during the construction phase and the principal + interest payments after the build is complete.Output (after clicking “Submit”):

This tool is ideal for:

Homebuyers planning to build their own residence

Real estate investors looking to finance new developments

Contractors and builders estimating financing needs for clients

Loan officers or financial advisors offering clients quick estimates

For instance, a user entering a $100,000 land purchase, $300,000 construction budget, 4% interest rate, and 360-month loan term will instantly see how much they need for the down payment, the total loan amount, and what monthly payments to expect—before and after construction is completed.

By understanding costs upfront, users can better manage expectations, assess affordability, and negotiate with lenders confidently.

 

How Construction Loan Calculator Works

User Inputs:

Price of property/land – If not already owned

Cost of construction project – Total build cost

Value of home when complete – Estimated final property value

Length of project (months) – Duration of construction

Interest Rate – Annual interest rate

Loan Term – Loan duration in months

(Admin Field: Downpayment Interest Percentage) – Default is 20%

Calculations:

Down Payment – Based on a percentage (e.g., 20%) of project value

Loan Payment – Total loan amount minus down payment

Initial Interest-Only Payment – Monthly interest on the loan during construction

Final Interest-Only Payment – Last interest-only payment at peak loan balance

Principal + Interest Payment – Monthly payment over the life of the loan after construction

Output (after clicking “Submit”):

Down Payment Required

Loan Amount

Initial & Final Interest-Only Payments

Ongoing Principal + Interest Payment

 

Report an Issue with Construction Loan Calculator

If you encounter any issues or have suggestions for improvements, please report them using the form below.

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Maximum file size: 268.44MB

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