Thirty days late. Nine percent of the profit.

What holding cost actually includes

Most investors track two holding costs — loan interest and property taxes — and are then surprised when the closing statement is worse than the spreadsheet. Holding cost is six line items, and the four people forget add up to about a fifth of the total.

Here is the full stack on a working deal. A tier-one sponsor buys at $420,000, budgets $95,000 of rehab, and underwrites to a $640,000 after-repair value. Three caps apply — 92.5% of project cost, 90% of the purchase price, and 75% of ARV — and the loan is the lowest of them. Here the purchase cap binds: 90% of $420,000 plus 100% of the $95,000 rehab is a $473,000 loan at 8.99%, with $42,000 of sponsor cash at close.

Interest is 80% of it, which is why the other five get ignored. But $885 a month of taxes, insurance, utilities, and upkeep is $5,310 across a six-month project — real money that never appears in a napkin underwrite.

One structural note that changes the interest line materially: whether your lender charges interest on drawn funds or on the committed balance. On a non-Dutch loan you pay for the $95,000 rehab tranche only as you draw it. On a Dutch loan you pay for all of it from day one. That is a separate article — Dutch vs non-Dutch interest — and on this deal the difference is worth roughly $2,000 over the rehab period.

Your daily burn number

Monthly framing hides the decision you actually make. Nobody chooses to be a month late. They choose to wait four days for a cheaper sub, six days for a permit they did not expedite, nine days for cabinets ordered after demo instead of at close. Those are daily decisions and they need a daily number.

Divide the monthly carry by thirty and put that number where you will see it. Every schedule decision you make is priced in it.The one habit that changes behaviour

That last line travels. A $300,000 project burns about $84 a day; an $800,000 project about $224. Rates and taxes shift it, but as a mental default for triaging schedule decisions on the fly, $28 per day per $100,000 of cost is close enough to be useful and simple enough to actually remember.

Thirty days, priced

Take the deal to its planned exit first. Six months, on schedule, sold at the $640,000 ARV:

Now add delay. And note where it lands: delay almost always happens at the back end of a project — punch list, final inspection, listing, escrow — by which point the loan is fully drawn. Every extra day accrues interest on the entire $473,000, not on the acquisition draw.

Roughly 9% of the profit per month, on a deal with a healthy 9.7% margin on cost. Push the leverage higher or the margin thinner and the percentage climbs fast. A deal underwritten to $30,000 of profit does not survive a 90-day slip at all — it survives about ten weeks, and then it is a break-even exercise in which you worked for six months for nothing.

Why delay costs more than the carry

The table above is the floor, not the ceiling, because delay produces costs that never show up in a holding-cost line.

The price cut. This is the big one. A house that sits accumulates days on market, buyers read that as a defect, and the answer is almost always a price reduction. One 3% cut on $640,000 is $19,200 — more than four months of holding cost, gone in a single conversation with your agent. And it is causally linked to the delay: the flip that lists in September into an active market does not need the cut that the same house needs listing in December.

From $49,792 to $22,888 — a 54% cut in profit from two months and one price reduction. That is the realistic bad case, and it is far more common than the pure-carry scenario.

Season slip. In most markets, spring and early summer carry a listing premium and a shorter time to contract. A project that misses that window does not just pay more carry; it sells into thinner demand. Ninety days of delay in the wrong direction can move you across a seasonal boundary and cost more than the interest ever did.

Extension pricing. If the delay pushes past maturity you are asking for an extension, and extensions are priced. PML writes fix-and-flip terms from 6 to 18 months, which makes this largely avoidable: taking the longer initial term on a project with real schedule risk costs nothing extra in interest — interest accrues on time outstanding either way — and removes the maturity scramble entirely. There is no prepayment penalty, so finishing early costs you nothing.

The deal you did not do. Your $42,000 of equity, your reserves, and your attention are all locked in a project that should have closed. If your capital turns three times a year at $49,000 a turn, a 90-day overrun is not just $13,284 of carry — it is a full acquisition cycle you did not get to run.

Where the days actually go

Delays are not random. In our servicing book the same six causes account for nearly all of them, in roughly this order.

• Permits and municipal inspections. The single largest source, and the one most sensitive to preparation. Plans submitted the week of close instead of during escrow routinely save two to four weeks.
• Long-lead materials. Cabinets, windows, custom millwork, and HVAC equipment have lead times measured in weeks. Ordering them at demo instead of at close is the most common self-inflicted delay in the business.
• Trade sequencing. A sub who does not show costs you the crew behind them too. Sequencing failures cascade in a way that individual delays do not.
• Draw timing. Work stops when money stops. This one is squarely inside your control — know what triggers a draw, document line items as they complete, and request as soon as they do. Our draw inspection article covers exactly what the inspector is verifying and how to keep the cycle short. PML funds approved draws weekly with a 48-hour wire, which only helps if the request goes in on time.
• Discovery. Foundation, sewer lateral, knob-and-tube, unpermitted prior work. Genuinely unpredictable in kind, entirely predictable in aggregate — which is what the contingency is for.
• Escrow and buyer financing. After you are done. Appraisal scheduling, buyer underwriting conditions, and repair negotiations can add three to five weeks after an accepted offer, and you carry every day of it.

Buying time back

Once you know the daily burn, most schedule decisions stop being judgment calls and become arithmetic. The test is one line:

If it costs less than $146 per day saved, buy the time.The whole acceleration decision

Two of those exceed the $146 threshold on carry alone and are still correct, because near the end of a project you are not only buying carry — you are buying the listing window, and the alternative cost is a price cut at $19,200, not $146 a day. The threshold is the floor of the analysis, not the whole of it.

Underwriting the delay before it happens

The professional move is not to eliminate delay. It is to have already paid for it in the underwrite, so the delay is an inconvenience rather than a repricing.

• Add 25% to the contractor’s schedule and underwrite that. A four-month build is a five-month carry. If the deal only works on the contractor’s number, it does not work.
• Take the longer loan term. With 6 to 18 month terms available and no prepayment penalty, a 12-month term on a six-month project is free optionality. Pay off early and you owe nothing extra.
• Hold holding-cost reserves separately from the rehab contingency. They cover different failures. A contingency that gets consumed by carry leaves you exposed on the next surprise.
• Sanity-check against the 70% rule. The rule’s 30% haircut is meant to absorb financing, carry, selling costs, and profit. If your buffered holding cost eats most of that spread, the acquisition price is wrong — not the schedule.
• Know the exit before you demo. If the resale window is tight, a refinance-and-hold exit converts a carry problem into a cash-flow decision instead of a forced price cut.

None of this requires optimism about your schedule. It requires the daily number, an honest buffer, and a loan term that does not force a decision on the worst possible day. Send us the deal and the real timeline — not the one you hope for — and we will structure the term around it.

Glossary

Holding cost (carry)

The total recurring cost of owning a project while it is being renovated and sold: loan interest, property taxes, insurance, utilities, upkeep, and HOA dues.

Daily burn

Monthly holding cost divided by days in the month. The number against which every schedule decision should be priced. Roughly $28 per day per $100,000 of project cost at current rates.

Drawn balance

The portion of the loan actually funded to date. Interest on a non-Dutch loan accrues on this figure, which is why holding cost rises through a project as rehab draws fund.

Long-lead items

Materials with procurement times measured in weeks — cabinets, windows, custom millwork, HVAC equipment. Ordering them at close rather than at demo is the cheapest schedule insurance available.

Days on market (DOM)

How long a listing has been active. Rising DOM is read by buyers as a defect signal and is the mechanism by which delay converts into a price reduction.

Extension

Additional time granted past a loan’s maturity date, typically priced. Largely avoidable by selecting a longer initial term where no prepayment penalty applies.

Contingency

A budgeted reserve for scope surprises discovered during rehab. Distinct from a holding-cost reserve, which covers schedule overrun rather than scope overrun.

Frequently asked questions