Guides · Construction · 7 min read
What an unsold spec home costs per month, how to weigh a price cut against continued carry, and when an incentive or a rental exit is the better answer.
In the September 2026 NAHB/Wells Fargo Housing Market Index, 38% of builders reported cutting prices, the average cut held at 6%, and 66% reported using sales incentives. Those are national survey figures and your market may be better or worse. But they describe the decision a lot of spec builders are sitting in front of this fall: the house is finished, the showings are thin, and the construction loan has a maturity date.
Most builders make this decision by feel. It can be made with arithmetic, and the arithmetic usually says to act sooner than feels comfortable.
A finished, unsold home costs money every month it sits. Take a spec home listed at 640,000 with 420,000 outstanding on the construction loan. The interest rate below is an illustration for the math, not a quote; current national average indicators are on the rates page.
| Monthly holding cost | Amount |
|---|---|
| Interest on 420,000 at an illustrative 10%, interest-only | 3,500 |
| Property taxes | 550 |
| Insurance (builder's risk or vacant property) | 250 |
| Utilities | 180 |
| Landscaping, snow, cleaning, staging upkeep | 220 |
| Total per month | 4,700 |
That is about 155 a day. It leaves out two things that are harder to see: the return you are not earning on the 100,000 or more of your own cash tied up in the house, and the next project you cannot start because the capital and your borrowing capacity are still committed to this one. Run your own figures on the holding cost calculator.
A price cut and a month of carry are the same thing in different units. Divide the cut by the monthly holding cost and you get the number of months of waiting it is worth.
| Price cut on 640,000 | Dollars | Equal to this many months of carry |
|---|---|---|
| 2% | 12,800 | 2.7 |
| 4% | 25,600 | 5.4 |
| 6% | 38,400 | 8.2 |
Read the table as a question. A 4% cut costs the same as holding for about five and a half months. If you believe the home will sell at full price inside that window, hold. If you think it could sit longer, the cut is cheaper, and it gets your capital back sooner.
Holding does not buy you the original price. It buys you a chance at it, and you pay 4,700 a month for the chance whether or not it comes through.
The comparison above assumes the home is worth 640,000 six months from now. If nearby builders are cutting, each of their closings becomes a comparable sale against you. Wait six months in a market that slips 3% and you have spent 28,200 on carry and still taken a 19,200 reduction. That is the outcome builders describe afterward as the one that hurt.
Construction loans are short. If the home finished in month nine of a twelve-month term, you have three months of marketing before maturity. Extensions are commonly available, subject to the lender's review, and commonly carry a fee; one point on a 420,000 balance is 4,200, close to another month of carry. Ask about extension terms before you need one, and talk to your lender early. A borrower who calls sixty days before maturity with a plan is in a different conversation than one who calls the week it comes due. How interest accrues during the build affects this too; see how construction draws work.
Buyers and agents read days on market. A house that has sat for 120 days draws lower offers than the same house at day 20, because everyone assumes something is wrong with it or with the price. A modest cut early usually does more than a larger one late.
A seller-paid concession of 12,000 toward a buyer's closing or financing costs takes the same 12,000 out of your proceeds as a 12,000 price cut. The difference is the recorded price. With a concession the sale closes at 640,000; with a cut it closes at 628,000, and that lower number is what the appraiser sees when you sell the house next door.
If the sale market is thin and the rental market is not, holding the home as a rental can be a legitimate exit. It works only if the numbers do. The construction loan was not written to be held, so the plan is typically a refinance into long-term rental financing, and that loan is sized on the rent. A home that needs 420,000 paid off and rents for 3,200 a month may not support that balance, which means bringing cash to the refinance. Work it through with the rental numbers that matter and the rental cash flow calculator before you treat it as a fallback.
A rental exit that requires 60,000 of new cash to avoid a 38,400 price cut is not a rescue. Sometimes the right answer is to take the cut, close, and put the capital into the next job.
If you are planning a spec build or working out the exit on one that is finished, you can send us the project. Financing is for business entities on non-owner-occupied property and is subject to underwriting. This guide is educational and is not legal, tax, or investment advice.
Send the address, the budget, and the timeline — you will get a straight answer, not a maybe.
Submit a ProjectAdd the interest on the outstanding construction loan balance, property taxes, vacant-property or builder's risk insurance, utilities, and upkeep. On a finished home with a 420,000 loan balance, the total commonly lands between 4,000 and 5,000 a month, most of it interest. Extension fees at loan maturity are on top of that.
Divide the price cut in dollars by your monthly holding cost. The result is the number of months of carry the cut is worth. If you honestly expect the home to sit longer than that at the current price, the cut is the cheaper path. The comparison only holds if the market is flat; in a softening market, waiting costs carry and price together.
Often, when you have more homes to sell nearby. A seller-paid concession costs you the same cash as an equal price cut, but the recorded sale price stays higher, which matters for the comparable sales behind your next appraisal. Appraisers do adjust for large concessions, so the benefit is real but limited.
Sometimes. The rent has to cover the debt on a long-term rental loan, and a construction loan usually has to be refinanced first because it was not written to be held. If the rent does not support the payoff balance, converting to a rental requires bringing cash in, which is a different decision than waiting.
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