Holding costs are the ongoing expenses that run from the day you close on a distressed property to the day you close on the resale. They are often underestimated, sometimes ignored entirely, and they are one of the most reliable ways a deal that looked profitable on paper turns into a breakeven or a loss.
Key takeaways
- Holding costs include financing, taxes, insurance, utilities, and sometimes HOA dues — every month the property sits, they compound.
- The longer the rehab and the longer the property sits on the market, the more holding costs grow relative to your projected margin.
- A realistic timeline estimate is as important as a realistic rehab budget; the two are connected.
- Many investors use the 70% rule as a starting point for maximum allowable offer, but that rule of thumb does not automatically account for unusually long timelines or high local carrying costs — treat it as a floor for scrutiny, not a ceiling for comfort.
- Underwriting holding costs line by line, before you make an offer, is the discipline that separates operators who stay in business from those who do not.
What counts as a holding cost
The category sounds simple, but it has more line items than most newer investors expect.
Financing. If the property is financed with hard money or private money, the interest accrues daily or monthly from the date of purchase. Hard money rates vary widely by lender and by borrower track record. On a six-month hold, that interest can represent a meaningful portion of your projected margin. On a nine- or twelve-month hold, it can consume margin you thought was there. Origination points paid at closing are a sunk cost, but monthly interest is a holding cost — track them separately in your underwriting.
Property taxes. Taxes accrue whether or not the property is occupied or under renovation. Depending on your county and the assessed value, this may be a modest line or a significant one. Check the current tax bill in the county records before you close; do not rely on what the prior owner was paying if an assessment change is possible.
Insurance. A standard homeowner's policy typically does not cover a vacant property under renovation. Vacant or builder's risk policies exist for exactly this scenario, and they cost more than standard coverage. Get a quote specific to the property before you finalize your underwriting — do not use a flat percentage estimate across every deal.
Utilities. Running electricity, water, and gas during a rehab is often necessary and sometimes required by code. These costs are real and accumulate monthly. In colder climates, winterizing or maintaining heat is a cost as well.
HOA dues. If the property is in a homeowners association, dues continue during your hold period. Unpaid dues can become a lien. Confirm whether an HOA exists and what the monthly assessment is before you close.
Lawn, maintenance, and security. An unoccupied property needs basic upkeep to avoid code violations and to maintain curb appeal for eventual listing. In some jurisdictions, the municipality can issue citations and assess fees on vacant properties that fall below maintenance standards.
Why timeline is the variable most investors mismodel
Every holding cost line item is a rate multiplied by time. The rehab budget estimate gets attention; the timeline estimate often does not get the same rigor.
A hypothetical example: suppose total holding costs on a property run around two thousand dollars per month (a rough, illustrative figure that will vary significantly by deal and market). A rehab projected at three months that runs to five months adds roughly four thousand dollars in unbudgeted holding costs. If the property then sits on the market for two months before going under contract, and closing takes another thirty to forty-five days, the original three-month hold becomes an eight- or nine-month hold. The numbers change substantially.
The sources of timeline slippage worth modeling in advance include:
- Contractor availability and sequencing delays, which are common in active renovation markets
- Permit timelines, which vary by municipality and by scope of work
- Material lead times, which have been unpredictable in recent years for certain categories
- Listing-to-contract time in the current market, which depends on inventory, seasonality, and pricing
- Buyer financing contingencies and appraisal timelines on the resale
A conservative underwriting approach builds in a buffer on both the rehab timeline and the marketing timeline. What that buffer is will depend on the specific market conditions and the scope of work. The discipline is building it in at all, rather than assuming best case.
How holding costs interact with the 70% rule and your ARV
The 70% rule is a widely used rule of thumb in fix-and-flip underwriting. In its most common form, it suggests that the maximum allowable offer is roughly 70% of the after-repair value minus the estimated rehab cost. The intent is to leave room for holding costs, closing costs on both ends, and a margin.
The rule of thumb is a useful starting screen, but it is not a substitute for line-item underwriting. A few situations where relying solely on 70% can mislead:
- High-value properties in markets with elevated carrying costs may need a tighter percentage to protect the same dollar margin.
- Properties with complex rehabs or permit requirements may have longer timelines than the rule accounts for.
- Markets where days on market have lengthened recently may require more holding cost buffer than the rule was originally calibrated to assume.
- Properties with title complications, delinquent taxes, or liens (common in distressed acquisitions) can extend the hold before you even start the rehab clock.
The right use of the rule is as a first filter. If a deal does not work at 70%, it almost certainly does not work at all. If it does work at 70%, that is when you build the full line-item model and pressure-test the timeline.
The mistakes that quietly compress margins
Beyond timeline underestimation, a few patterns recur in deals that underperform:
Carrying costs not re-run when the rehab scope changes. Scope creep is common in distressed properties — issues found behind walls, under floors, or in crawlspaces are not visible at walkthrough. When the rehab budget increases, many investors update the cost side but do not re-run the timeline and holding cost implications.
Using an ARV that is too optimistic. After-repair value should be based on closed comparable sales, not active listings. Active listings are asking prices; they are not confirmed market values. The comps used should be similar in size, condition, and location, and recent enough to reflect current market conditions. If the market has softened since those comps closed, a downward adjustment may be warranted.
Ignoring both sides of closing costs. Acquisition closing costs are obvious — they happen at purchase. Resale closing costs are sometimes underweighted. Depending on the transaction, seller-paid concessions, agent commissions (subject to current market norms and any applicable rule changes), transfer taxes, and title fees all reduce the net proceeds from the resale.
No exit strategy if the flip does not sell. A flip that does not sell at the expected price within the expected timeline creates a decision point. Dropping the price extends holding costs and reduces margin. Renting the property changes the financing picture significantly, especially if a hard money loan is outstanding. The time to think through a backup exit is during underwriting, not when the listing has sat for sixty days.
What to do next
Before making an offer on any distressed property, build a line-item holding cost estimate: financing, taxes, insurance, utilities, HOA if applicable, and maintenance. Estimate a realistic timeline that includes rehab, listing, contract-to-close, and a buffer for delays. Run those numbers at multiple timeline scenarios — base case, extended by two months, extended by four months — and confirm the deal still works under the longer scenarios.
CoreVest Acquisitions identifies distressed properties through public county records and shares those leads with member investors, which means the deal analysis starts before a lot of competition is aware the property is available. For investors who want help keeping the paperwork and deadlines organized through the transaction, CoreVest TC coordinates that process as a separate service.
On any contract, assignment, or ownership transfer question, rules vary by state and change. Consult a licensed real estate attorney in your state, your state real estate commission, and your closing attorney or title company before acting on any specific deal structure.
This is general educational information, not legal, tax, or investment advice. Rules and markets vary by state and by deal, so consult a licensed attorney, your state real estate commission, and your own advisors before acting.