Investor · Ground-Up Construction · Build to Sell
Build to Sell Calculator: Spec Home Profit After Financing
Quick answer: Build to sell profit is the sale price minus selling costs, minus everything it took to build: land, demolition, hard and soft costs, contingency, loan points and the interest you carry while building and selling. Interest only runs on the part of the construction loan that has been drawn, so enter your term sheet's loan-to-cost, rate and timeline to see your real profit and return on cash.
Built by Jim Blackburn · NMLS #1072866 · $500M+ closed · 7× Scotsman Guide Top Producer
Enter the interest rate and points from your term sheet to see interest carry, profit and return. The loan-to-cost and selling-cost figures are examples, not a quote; replace them and the example costs, timeline and sale price with your own.
Land & build budget
Site work, foundation, framing, systems, finishes and builder fees.
Soft costs: permits, plans, engineering, impact fees, builder's risk insurance, taxes during the build. Contingency is figured on hard costs plus demolition.
Construction loan (from your term sheet)
Interest accrues only on money drawn. A steady build averages near half; front-loaded land or site work pushes it higher.
Timeline & sale
Selling costs: agent commissions, transfer taxes, title and any seller concessions, as a percent of the sale price.
Enter your interest rate
Estimates only — not a commitment to lend or a Loan Estimate. Jim Blackburn, NMLS #1072866.
How Build to Sell Profit Is Calculated
A build to sell project has two cost layers. The first is the build itself: land or a teardown, demolition, hard costs, soft costs and a contingency for overruns. The second is the cost of the money: origination points paid at closing and the interest that runs from the first draw until the home sells. Profit is what's left of the sale price after selling costs and both layers are paid.
Example with the starting numbers: $250,000 land + $25,000 demolition + $600,000 hard + $60,000 soft + $62,500 contingency (10% of hard and demolition) = $997,500 project cost. At 80% loan-to-cost the loan is $798,000, so the builder brings $199,500, plus any origination points on the term sheet. Interest and profit depend on the rate in your term sheet.
Why Interest Carry Depends on the Draw Schedule
A construction loan isn't handed over in one piece. The lender funds draws as work is finished and inspected, and interest is charged only on what has been drawn. Early in the build, little is out; near the end, almost all of it is. This calculator uses an average draw outstanding (50%, 60% or 75%) for the build months, then charges interest on the full loan for the months the finished home is on the market:
Interest carry = loan × (rate ÷ 12) × [(build months × average draw %) + months to sell]
If your land is bought with loan funds at closing, or the site work is heavy and early, more of the loan is out sooner; choose 75%. A steady build with the land paid in cash fits closer to 50%.
Loan-to-Cost vs. Completed Value
Lenders on spec construction usually size the loan as a percentage of total project cost (loan-to-cost). Many also check it against the projected completed value of the home and use whichever gives the smaller loan. Because these limits differ from lender to lender and project to project, this page doesn't assume one; enter the loan-to-cost from your term sheet. If your lender caps by completed value and that produces a smaller loan, your cash equity goes up by the difference.
Reading the Results
- Profit margin on sale price tells you how much room the deal has if the market softens. It is roughly how far the sale price could fall before the profit is gone, before counting the extra interest a slower sale adds.
- Return on cash invested measures profit against the cash you actually put in, including points and the interest you pay monthly during the project.
- Break-even sale price is the floor: below it, the project loses money after financing and selling costs.
Change the months to sell to stress-test the deal. A home that sits on the market for six months instead of three keeps the fully drawn loan accruing interest the whole time.
Frequently Asked Questions
What does a build to sell calculator show?
It adds up what a ground-up spec home costs to build (land or teardown, demolition, hard costs, soft costs and a contingency), sizes the construction loan from your lender's loan-to-cost limit, estimates the interest you carry while building and selling, and subtracts everything plus selling costs from your projected sale price. The result is your estimated net profit, margin on the sale price and return on the cash you put in.
How is the construction loan amount set on a build to sell project?
Most construction lenders size the loan as a percentage of total project cost, called loan-to-cost (LTC). Some also cap the loan at a percentage of the home's projected completed value, and the lower of the two applies. Your term sheet states which limits your lender uses. Enter its LTC here; whatever the loan doesn't cover is the cash you bring.
Why does build to sell loan interest accrue only on the drawn balance?
Construction loans are funded in draws as work is completed and inspected, so early in the build only part of the loan is outstanding. Interest is charged on the money actually drawn. The average draw outstanding setting (50%, 60% or 75%) approximates how much of the loan is out, on average, during construction. Once the home is finished and listed, the loan is fully drawn and interest runs on the full balance until it sells.
What costs belong in a build to sell budget?
Hard costs are the physical build: site work, foundation, framing, systems, finishes and builder fees. Soft costs are everything else needed to build: plans, engineering, permits, impact and utility connection fees, surveys, builder's risk insurance and property taxes during construction. A contingency (a percentage of hard and demolition costs) covers overruns. Selling costs, such as agent commissions, transfer taxes and seller concessions, come out of the sale price.
What happens to build to sell profit if the home takes longer to sell?
Every extra month on the market adds a month of interest on the fully drawn loan, plus taxes, insurance and utilities you are still paying. Change the months to sell field to see how much a slow sale costs. The break-even sale price result shows the lowest price at which you'd recover all costs and financing.
Is there a standard profit margin for a build to sell home?
There's no official standard. Builders, investors and lenders each set their own targets depending on the market, the size of the project and the risk. This calculator shows both the margin on the sale price and the return on cash invested so you can compare a deal against your own targets and your lender's requirements.
Why doesn't this build to sell calculator show an interest rate?
Construction loan pricing varies by lender, project, experience and loan size, and it changes often, so we don't post rates. Enter the rate from your term sheet and the interest carry, total cost, profit and return results will fill in.
Planning a Build to Sell Project?
Send us your budget, timeline and projected sale price and we'll review the construction financing options for your project.
- Only 2 minutes to complete
- No credit score impact
Related Construction and Investor Tools
Important Disclaimer
This calculator illustrates the costs, financing and profit of a build to sell project using only the numbers you enter. Loan-to-cost, points, interest rates, draw schedules and other terms vary by lender and project; use the figures from your own term sheet. Results exclude income taxes, cost overruns beyond your contingency, and changes in market value. It is not a Loan Estimate, a rate quote, a loan approval or a commitment to lend. All borrowers must qualify based on lender and property guidelines. Jim Blackburn, NMLS #1072866. Equal Housing Opportunity.