Property development

Construction Loan Draw Calculator

Estimate average balance, interest and peak construction debt. Enter your own assumptions and local rates.

What this calculator estimates

Estimate average balance, interest and peak construction debt. It combines the inputs below to produce Estimated peak construction debt. Every assumption remains editable so the estimate can reflect the property, financing and location being evaluated.

Worked example

Using the displayed sample assumptions, the calculator produces $2,415,000. This is an illustration, not a market quote. Change one input at a time to understand what drives the result.

Inputs and assumptions

• Total project cost — sample input: 3000000 currency units
• Equity funded first — sample input: 750000 currency units
• Construction months — sample input: 18 months
• Construction loan rate — sample input: 8 %
• Loan fees — sample input: 30000 currency units

How to interpret the result

Stress-test cost, timing, financing and stabilization assumptions. Compare a conservative case with an expected case and keep a record of the assumptions used.

Common mistake to avoid

Do not treat a preliminary budget as a guaranteed project cost. Local definitions, taxes, lending practices and measurement requirements can materially change the result.

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Reviewed 2026-09-08.