How to Calculate Your Home Flip Timeline and Total Cost Before You Buy

The Four Cost Buckets That Determine Flip Profitability

Every flip profit or loss traces back to four buckets: acquisition cost, rehab cost, carrying cost, and selling cost. Any missing component undermines the accuracy of the entire projection.

Acquisition cost includes the purchase price, buyer closing costs (typically 1% to 2% of purchase price), inspection fees, and title insurance. On a $220,000 purchase, acquisition costs often total $223,500 to $224,400 before a single contractor is hired.

Rehab cost is the most variable bucket and the one most often underestimated. Experienced flippers apply a contingency buffer of 15% to 20% on top of contractor quotes. A quoted renovation of $45,000 should be budgeted at $51,750 to $54,000.

Carrying cost runs from the day of purchase close to the day of resale close. It includes hard money loan interest, private money loan interest or conventional mortgage interest, property taxes, homeowner's insurance, and utilities. This bucket grows every week the project runs long.

Selling cost includes the listing agent commission (typically 2.5% to 3% of resale price), buyer's agent commission (2.5% to 3%), transfer taxes, and any seller-paid closing concessions. On a $310,000 resale, selling costs typically total $18,600 to $24,800.

How to Build a Flip Timeline: The Three-Phase Model

A realistic flip timeline has three sequential phases: acquisition, active renovation, and disposition. Each phase carries a distinct cost profile and a distinct risk of overrun.

Phase 1: Acquisition (14 to 30 days). This phase covers the period from accepted offer to purchase close. Hard money lenders typically close in 10 to 21 business days. Conventional lenders take 30 to 45 days. Hard money lenders usually fix timing in this phase, but delays push every subsequent phase later.

Phase 2: Active Renovation (45 to 120 days). Scope and existing property condition drive this range. A cosmetic flip (paint, flooring, fixtures, landscaping) typically runs 45 to 60 days. A structural or systems-level renovation (roof, HVAC, electrical panel, foundation) runs 90 to 120 days or longer. Budget for this phase generously. Permit delays alone add 14 to 30 days in many U.S. municipalities.

Phase 3: Disposition (30 to 75 days). This phase covers listing, contract execution, buyer financing, and resale close. In a strong seller's market, disposition can compress to 30 days. In a slower market, 60 to 75 days is realistic. Do not assume the fastest scenario when projecting carrying costs.

Total realistic timeline: 89 to 225 days. Plan carrying costs across the full range, not the optimistic end.

Worked Example 1: The Cosmetic Flip

A flipper purchases a single-family home in Columbus, Ohio for $185,000. Acquisition costs (closing costs, title, inspection) add $3,100. The renovation scope is cosmetic: new flooring ($8,200), full interior paint ($4,500), kitchen hardware and fixtures ($3,800), landscaping ($2,200), and a 15% contingency buffer ($2,805). Total rehab budget: $21,505.

The flipper finances the purchase with a hard money loan at 11.5% interest-only on $185,000. Monthly interest: $1,774. Property taxes in this Columbus zip code run $312 per month. Insurance runs $95 per month. Monthly carrying cost: $2,181.

The projected timeline is 75 days (30-day acquisition already closed, 45-day renovation, no listing period included yet). The flipper projects a 45-day disposition phase. Total project duration from purchase close: 90 days, or 3 months.

Total carrying cost: 3 x $2,181 = $6,543.

After-repair value (ARV): $265,000. Selling costs at 5.5% commission plus $1,800 in transfer taxes and concessions: $16,375.

Profit calculation:

• Total cost: $185,000 + $3,100 + $21,505 + $6,543 + $16,375 = $232,523
• Gross profit: $265,000 - $232,523 = $32,477
• Return on total cost: 32,477 / 232,523 = 13.97%

That margin is workable but tight. A 30-day renovation overrun adds another $2,181 in carrying cost and drops net profit to $30,296.

Worked Example 2: The Full Rehab Flip

A flipper in Memphis, Tennessee acquires a distressed property for $112,000 with $2,400 in acquisition costs. The renovation requires a new roof ($14,500), HVAC replacement ($9,800), full kitchen gut ($22,000), two bathroom remodels ($11,400), electrical panel upgrade ($4,200), and cosmetic work ($8,100). Contractor quotes total $70,000. The flipper applies a 20% contingency: $84,000 total rehab budget.

Financing: $112,000 hard money loan at 12% interest-only. Monthly interest: $1,120. Property taxes: $195 per month. Insurance: $110 per month. Monthly carrying cost: $1,425.

Projected timeline from purchase close: 105 days renovation plus 60 days disposition = 165 days, or 5.5 months.

Total carrying cost: 5.5 x $1,425 = $7,838.

ARV: $218,000. Selling costs at 5.5% commission plus $1,200 in concessions: $13,190.

Profit calculation:

• Total cost: $112,000 + $2,400 + $84,000 + $7,838 + $13,190 = $219,428
• Gross profit: $218,000 - $219,428 = -$1,428

The deal loses money at this ARV and this rehab budget. The flipper must either negotiate the purchase price down to at least $108,000, compress the renovation contingency, or verify a higher ARV before making an offer. This is exactly the calculation that must happen before, not after, purchase.

The Maximum Allowable Offer Formula

The maximum allowable offer (MAO) is the highest purchase price at which the deal still meets a minimum profit threshold. Many experienced flippers require a minimum gross profit of $25,000 or a minimum return of 12% on total cost.

MAO formula (plain text): MAO = ARV - Minimum Profit - Rehab Budget - Carrying Cost Estimate - Selling Costs - Acquisition Costs (non-purchase)

For the Memphis example above, targeting a $25,000 minimum profit: MAO = $218,000 - $25,000 - $84,000 - $7,838 - $13,190 - $2,400 = $85,572

At the $112,000 purchase price, the deal fails the test by $26,428. That number defines exactly how much price reduction the flipper must negotiate, or how much ARV evidence they need to surface, before the deal is viable.

Why Carrying Costs Compound Faster Than Most Flippers Expect

Hard money loans typically carry rates between 10% and 14% annually, plus origination points of 1% to 3% of the loan amount paid at close. A $175,000 hard money loan at 12% with 2 points costs $3,500 at origination and $1,750 per month in interest. Over a 6-month flip, that loan costs $14,000 in interest alone before property taxes and insurance.

Investors who switch to a conventional investment property loan at 7.5% on the same $175,000 balance pay $1,094 per month, or $6,563 over 6 months. The difference, $7,437, drops directly to the bottom line. The tradeoff is a longer approval timeline and stricter underwriting. The right choice depends on deal speed requirements.

Run Your Flip Numbers Before You Make an Offer

The CalcMoney Mortgage Calculator lets you model monthly carrying costs under any loan rate, term, and balance. Plug in your hard money rate, your projected balance, and your estimated hold period to see total interest carry before committing to a purchase price.

Change the rate input to compare a hard money loan at 12% against a conventional investment loan at 7.5%. The dollar difference in monthly and total interest determines whether the speed premium of hard money financing is worth the cost on any specific deal.

Build the four cost buckets first. Run the MAO formula. Then model the financing cost with a real calculator before the offer goes in.

You Might Also Like

• 1031 Exchange Timeline and Replacement Rules: The Exact Calculations You Need
• how to calculate buyer closing cost by state
• Cost Segregation Tax Benefit: How to Calculate What You're Actually Leaving on the Table

Results are estimates for informational purposes only. Consult a licensed financial professional before making financial decisions.