What is a draw schedule?

A draw schedule outlines exactly when funds will be released by the lender to the builder. These releases are tied to specific construction milestones (e.g., foundation poured, framing complete). The bank will typically send an inspector to verify the work before releasing each draw.

What happens when construction is finished?

Most modern construction loans are 'construction-to-permanent' loans (single close). Once the home is finished and a Certificate of Occupancy is issued, the interest-only construction loan automatically converts into a standard 15- or 30-year amortizing mortgage.

Do I need a contingency fund?

Yes, absolutely. Building a home almost always encounters unexpected costs, such as lumber price spikes or delays. Lenders typically require or recommend a 10% to 20% contingency buffer built into the total loan limit to absorb these cost overruns without stalling the project.

Construction Loan Draw Calculator

Construction Loan Calculator

Loan Basics

Total Base Loan Amount

Interest Rate

Build Period

Draw Schedule

Phase

Amount

Phase

Amount

Phase

Amount

Phase

Amount

Phase

Amount

What Is a Construction Loan Draw Calculator?

A construction loan draw calculator is a specialized financial modeling tool for homebuyers and real estate developers building a property from the ground up. Unlike a standard mortgage where the entire loan amount is handed over on closing day, construction loans are paid out in stages, called "draws", as the builder completes specific milestones. This calculator models exactly how these staggered payouts affect your monthly interest obligations, giving you a precise forecast of your holding costs during the build phase.

How Construction Interest Works

The core advantage of a construction loan is that you are only charged interest on the funds that have actually been disbursed to the builder, not the total loan limit. For example, if you have a $500,000 loan but have only drawn $50,000 to pour the foundation, your monthly interest payment is calculated solely on that $50,000. As construction progresses and more draws are taken to pay for framing, plumbing, and finishing, the disbursed balance grows, causing your monthly interest payments to steadily increase until the project is finished.

Understanding Your Results

The primary output of this calculator is the total interest paid during the build. This represents cash out-of-pocket that you must account for while simultaneously paying for your current living situation. The monthly interest schedule provides a month-by-month breakdown so you know exactly what your bill will look like as the project nears completion. The permanent loan projection estimates what your standard monthly Principal and Interest (P&I) payment will be once the home is finished and the construction loan converts to a standard mortgage.

Key Factors

The total loan amount sets the ceiling for your project budget. The interest rate on construction loans is typically variable and usually 1% to 2% higher than standard mortgage rates because the bank is lending against an unfinished asset. The build period dictates how long you will carry these interest-only payments. A faster build saves you thousands in interest, while weather delays or supply chain issues will drastically increase your holding costs.

The Draw Schedule

The custom draw schedule is the engine of this calculator. You can map out exactly when your builder expects to be paid based on your construction contract. A heavily front-loaded schedule (where the builder requires massive payments early for land or materials) will result in much higher total interest costs. A back-loaded schedule keeps your disbursed balance lower for longer, saving you significant money on interest.

Tips & Best Practices

Always include a 10% to 20% contingency buffer in your loan limit; construction projects almost universally run over budget due to material upgrades or unexpected site issues. Push your builder for a fair draw schedule that ties payments strictly to completed, verifiable milestones rather than upfront deposits. Finally, consider a "Single-Close" or "Construction-to-Permanent" loan, which automatically converts your construction loan into a 30-year mortgage upon completion, saving you thousands of dollars in duplicate closing costs.

Frequently Asked Questions

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