Calculate monthly and total holding costs for a flip: mortgage, property taxes, insurance, utilities, and HOA fees over your hold period.
Holding costs are the silent profit killer in house flipping. Every month you own a property, you're paying a mortgage (or hard money interest), property taxes, insurance, utilities, and potentially HOA fees — whether the property is generating any income or not. A flip that was projected to take 4 months but stretches to 8 months can easily lose $8,000–16,000 in additional carrying costs.
This calculator itemizes your monthly holding expenses and multiplies them by your expected hold period. It shows total carrying costs, cost per day (helpful for understanding the urgency of finishing on time), and how holding costs impact your overall flip profitability.
Use this tool during deal analysis to stress-test your assumptions about timeline. What happens if your rehab takes 2 months longer? What if the house sits on the market for 3 months? These scenarios help you build a realistic budget that includes the true cost of time.
Time is money in flipping — literally. Each extra month adds a fixed cost regardless of whether you've made progress on the rehab. This calculator quantifies the time cost so you can make better decisions about hold period, pricing, and contractor schedules. Instant recalculation lets you compare scenarios side by side, so every buying, selling, or investment decision is grounded in solid financial analysis.
Monthly Holding Cost = Mortgage + Taxes + Insurance + Utilities + HOA + Other Total Holding Cost = Monthly × Hold Period (months) Daily Holding Cost = Monthly / 30
Result: Total holding costs = $12,450
Monthly costs: $1,400 mortgage + $350 taxes + $125 insurance + $200 utilities = $2,075/month. Over a 6-month hold period, total carrying costs are $2,075 × 6 = $12,450. That's $69/day — every day the project is delayed costs $69.
Holding costs are the reason speed matters in flipping. A property that generates $2,500/month in carrying costs needs to be bought, renovated, and sold as quickly as possible. Every delay — permit issues, contractor no-shows, slow markets — directly reduces your profit dollar for dollar.
Professional flippers minimize hold time by having their contractor team lined up before closing, pulling permits during the due diligence period, and pre-ordering materials. They also price properties aggressively when listing rather than chasing top dollar for months. Selling 3% below list price but 2 months faster often nets more profit.
Hard money loans amplify carrying costs because they charge 10—14% interest (compared to 6–7% for conventional loans) and often include monthly fees. A $250,000 hard money loan at 12% costs $2,500/month in interest alone. This is why hard money flippers are especially time-sensitive.
Holding costs (also called carrying costs) are the recurring expenses you pay every month while you own a property. They include mortgage or loan payments, property taxes, insurance, utilities, HOA fees, and any other ongoing expenses. These costs accrue whether the property is being renovated, listed for sale, or sitting vacant.
Divide the annual property tax by 12 to get the monthly cost. For example, if annual taxes are $4,200, the monthly holding cost is $350. Note that some jurisdictions reassess taxes after a sale or renovation, potentially increasing your tax obligation.
For holding cost purposes, include the full mortgage payment (principal + interest). While principal payments technically build equity, they still require cash outflow each month. Hard money loans are typically interest-only, so the full payment is a pure holding cost.
Holding costs typically range from $1,500 to $4,000 per month depending on property value, location, and financing method. Over a typical 5–7 month flip, that's $7,500–$28,000 — a significant portion of your profit margin. Hard money financing increases this substantially.
Every extra month adds one full month of holding costs to your budget. If your monthly carry is $2,500 and the project takes 3 months longer, that's $7,500 of unplanned expense taken directly from your profit. Many negative-return flips were profitable on paper but lost money due to extended timelines.
Yes, absolutely. Standard homeowner's insurance doesn't cover vacant or under-renovation properties. You need a builder's risk or vacant property policy. Costs vary but expect $100–250/month. Going without insurance is a huge liability if the property is damaged by fire, vandalism, or weather.