What Is Holding Costs?
Holding costs = mortgage (or interest-only for flips) + property tax + insurance + utilities + maintenance + HOA (if applicable). For a flip, you might pay $2,500/month in holding costs over 6 months = $15,000—that comes straight out of profit. For a rental, holding costs are part of operating expenses; when the unit is vacant, you still pay them. A Memphis duplex with $1,800/month mortgage, $185 taxes, $120 insurance, $80 utilities = $2,185/month in holding costs. One month vacant = $2,185 out of pocket. Conservative underwriting adds 1–2 months of holding costs to your flip budget.
Holding costs are the ongoing expenses you pay while owning a property—mortgage (or interest), property tax, insurance, utilities, maintenance—whether it's rented, vacant, or under rehab.
At a Glance
- What it is: Ongoing costs while you own a property
- Why it matters: Eats into flip profit; must be covered during vacancy
- Key components: Mortgage, taxes, insurance, utilities, maintenance
- Flip rule: 6–8 months holding costs in budget—rehab delays happen
Monthly Holding Cost = Mortgage + Taxes + Insurance + Utilities + Maintenance
How It Works
For flips. You're not collecting rent. Every month you're paying: mortgage (or hard money interest), taxes, insurance, utilities (if you're running AC during rehab), and maintenance. A $150,000 hard money loan at 12% interest-only = $1,500/month. Property taxes in Columbus: ~$2,200/year = $183/month. Insurance: $1,200/year = $100/month. Utilities during rehab: $150/month. Total: ~$1,933/month. A 6-month hold = $11,600. Budget 12 months if you're conservative—rehab delays, permit delays, and market slow-downs happen.
For rentals. When occupied, rent covers holding costs (minus your profit). When vacant, you pay out of pocket. Vacancy rate in your pro forma accounts for that—but actual vacancy can be longer. A 2-month vacancy on a $1,200/month unit = $2,400 lost rent plus you're still paying the mortgage. Holding costs during vacancy = double hit.
For rehabs. Add utilities (power for tools, HVAC to prevent mold), dumpster, permit fees, and sometimes temporary insurance riders. A 4-month rehab in Phoenix: $2,200/month mortgage + $250 taxes + $150 insurance + $200 utilities = $2,800/month. Total: $11,200. Add 2 months contingency = $15,600 in holding costs for the rehab period.
Real-World Example
Indianapolis fix-and-flip. Purchase $95,000, rehab $42,000, hard money at 12% interest-only. Monthly: interest $950, taxes $120, insurance $85, utilities $100. Holding cost: $1,255/month. You plan 5 months. Actual: permit delay (2 weeks), contractor scheduling (3 weeks), winter slow-down (1 month). Total hold: 8 months. Holding costs: $10,040. Your pro forma had $6,275. You're $3,765 over. That comes out of your $28,000 gross profit. You still make $24,235—but the margin is thinner than you modeled. Next flip, you budget 8 months of holding costs.
Pros & Cons
- Predictable—you know mortgage, taxes, insurance
- Budgetable—multiply by expected hold period
- Forces discipline—long holds = higher costs = need to buy right
- Integrates with operating expenses for rentals
- Can spike—insurance renewals, tax reassessment
- Hard to reduce—mortgage and taxes are fixed
- Vacancy amplifies—you pay without revenue
- Rehab delays compound—every extra month adds full holding cost
Watch Out
- Underestimating hold time: Flips routinely take 2–3 months longer than planned. Budget 8 months, not 5.
- Ignoring utilities during rehab: You're running power, HVAC, water. $150–300/month adds up.
- Tax reassessment on purchase: In many states, buying triggers reassessment. Your first full year of taxes may be 20–30% higher than the previous owner's.
- Vacancy during lease-up: Value-add with 20% vacancy. You're paying holding costs on empty units during renovation and lease-up. Model 3–6 months of partial vacancy.
Ask an Investor
The Takeaway
Holding costs = mortgage + taxes + insurance + utilities + maintenance—what you pay every month while you own the property. For flips, they come straight out of profit; budget 6–8 months minimum. For rentals, they're part of operating expenses; vacancy means you pay without revenue. Conservative underwriting adds 1–2 months of holding costs to your flip budget.