Run the numbers

Construction loan calculator.

Enter the land, hard and soft costs, and the completed value to estimate the loan at loan-to-cost, the equity you bring, and the interest you carry while the loan is drawn.

Project assumptions

Use the budget you know today. The result updates as the assumptions change.

Project budget
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Already own the lot? Enter its current value.

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Loan terms
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The rate, loan-to-cost, origination fee and loan term are prefilled with Sphinx Capital's published construction terms as of October 5, 2026. Change any of them to match your project. See the construction program page for current terms.

How it works

A disciplined first pass before underwriting.

  1. 01Add land, hard costs, soft costs and a contingency to reach the total project cost.
  2. 02Size the loan at loan-to-cost; the rest of the project cost is your equity.
  3. 03Interest accrues on the drawn balance only, so the draw schedule decides what you carry.

The loan funds its share of the land at closing and the same share of each monthly draw. Draws are assumed at the start of each month; after the last draw, the full loan accrues interest until the end of the term. Projected profit is the sale price or completed value minus the total project cost, the origination fee and the estimated interest.

Ready to put the project in front of us?

Start the construction application, or talk to us first about the budget, the draw schedule and timing.