House flipping — buying a property below market value, renovating it, and selling it at a profit — is the most visible form of real estate investing. It is also one of the most misunderstood. Television shows make flipping look like a weekend project with guaranteed returns. In reality, successful flipping requires disciplined deal sourcing, accurate renovation budgeting, reliable contractor management, precise ARV (After Repair Value) analysis, and a clear understanding of the holding costs that erode your profit every day you own the property.
This guide covers the complete flipping process, from finding deals to collecting your check at the closing table. We will be direct about what works, what does not, and where first-time flippers lose money.
The 70% Rule: Your Maximum Offer
The 70% Rule is the most widely used formula for determining the maximum you should pay for a flip:
Maximum Purchase Price = (ARV x 70%) − Estimated Rehab Costs
Example: A property with an ARV of $300,000 and estimated rehab of $50,000:
- $300,000 x 0.70 = $210,000
- $210,000 − $50,000 = $160,000 maximum offer
The 30% margin covers your holding costs (financing, insurance, taxes, utilities), closing costs on both the purchase and sale (typically 8–12% combined), and your profit. In practice:
- Holding costs: 5–8% of ARV (depending on project duration and financing terms)
- Purchase closing costs: 1–3% of purchase price
- Sale closing costs: 6–8% of sale price (agent commissions + title + transfer taxes)
- Your profit: What is left — typically 10–15% of ARV on a well-executed flip
When to Adjust the 70% Rule
- Higher-value properties ($400K+ ARV): You can accept tighter margins (75% rule) because the absolute dollar profit is still meaningful.
- Lower-value properties (under $150K ARV): Use 65% or lower. The fixed costs (agent commissions, closing costs, minimum rehab costs) take a larger percentage bite on cheaper properties.
- Long rehab timelines (6+ months): Use 65% to account for extended holding costs.
- Fast, cosmetic flips (under 3 months): 72–75% may work if you have low financing costs and a fast market.
Finding Flip Deals
The number one challenge in flipping is finding properties at prices that satisfy the 70% Rule. In a market where retail buyers compete on MLS, this requires creative deal sourcing:
1. MLS (Multiple Listing Service)
Contrary to popular belief, MLS deals are still possible. Focus on: listings that have been on market 60+ days (stale inventory), price reductions, estate sales, REO (bank-owned) properties, and pre-foreclosure listings. Work with an agent who understands investor criteria and can set up automated alerts for properties matching your 70% Rule parameters.
2. Auctions
Foreclosure auctions (courthouse steps), tax lien auctions, and online auction platforms (Auction.com, Hubzu, Xome) can produce below-market deals. Risks: you often cannot inspect the property before purchase, title may have liens, and you typically must pay cash or have financing pre-arranged. Not recommended for beginners without experienced mentorship.
3. Wholesalers
Wholesalers find distressed properties, put them under contract, and assign the contract to you for a fee ($5,000–$15,000 typically). The wholesaler's markup is your cost for their deal-finding effort. Build relationships with 3–5 active wholesalers in your market. Verify the ARV and rehab estimates independently — wholesalers are incentivized to present optimistic numbers.
4. Driving for Dollars
Physically drive neighborhoods looking for signs of distress: overgrown lawns, boarded windows, code violation notices, deferred maintenance. Record addresses using apps like DealMachine or PropStream. Skip trace the owners and make direct contact. This is labor-intensive but produces the best margins because you are sourcing before the property reaches any market.
5. Direct Mail
Send targeted mail to motivated seller lists: absentee owners, pre-foreclosures, inherited properties (probate), code violations, and tax-delinquent properties. Response rates are typically 0.5–2%, meaning you need to send 1,000–5,000 pieces to generate 5–50 responses, from which 1–3 may become deals. Cost: $0.50–$1.50 per piece mailed.
Estimating Rehab Costs
Inaccurate rehab estimates are the #1 profit killer for new flippers. Here is a framework:
Cosmetic Rehab ($15–$30/sq ft)
- Interior paint: $1.50–$3.00/sq ft
- Flooring (LVP): $3.00–$6.00/sq ft installed
- Kitchen refresh (cabinets, counters, appliances, no layout change): $8,000–$18,000
- Bathroom refresh (vanity, toilet, hardware, no layout change): $3,000–$6,000 per bath
- Light fixtures and hardware: $1,000–$3,000
- Landscaping and curb appeal: $2,000–$5,000
Moderate Rehab ($30–$60/sq ft)
- Everything above, plus:
- Full kitchen renovation (new cabinets, layout modification): $15,000–$35,000
- Full bathroom renovation: $8,000–$15,000 per bath
- Electrical panel upgrade: $2,000–$4,000
- Plumbing repairs (not full replacement): $3,000–$8,000
- HVAC replacement: $5,000–$12,000
- Roof replacement: $8,000–$18,000 (depends on size and materials)
- Window replacement: $400–$800 per window
Full Gut Rehab ($60–$120+/sq ft)
- Everything above, plus:
- Structural work (foundation, framing): $10,000–$50,000+
- Complete electrical rewire: $8,000–$20,000
- Complete plumbing replacement: $8,000–$25,000
- Permits and engineering: $3,000–$10,000
- Dumpsters and hauling: $3,000–$8,000
The contingency rule:Always add 15–20% to your total rehab estimate for unexpected issues. On older properties (pre-1960), add 25%. Every experienced flipper has a story about opening a wall and finding a problem that added $10,000+ to the project.
ARV Analysis: Getting the Number Right
Your ARV determines everything. If your ARV is wrong, your 70% Rule calculation is wrong, your profit projection is wrong, and you may lose money. Here is how to determine ARV accurately:
- Pull 3–6 comparable sales (comps): Same neighborhood, similar size (within 20% sq ft), similar bed/bath count, similar condition (after your renovation), sold within 6 months.
- Adjust for differences: $10–$30/sq ft for size differences, $3,000–$8,000 for extra bedrooms or bathrooms, $5,000–$15,000 for garage vs. no garage.
- Drive the comps: Physically look at the comparable properties. Photos can be misleading. Is the comp on a busy road? Next to a commercial property? In a different school zone?
- Be conservative: Use the lower end of the comp range, not the highest sale. You are betting your profit on this number.
- Talk to a local agent: An experienced listing agent in your target area can tell you what the property will realistically sell for. Their opinion is worth more than any algorithm.
Managing Contractors
Contractor management is the second most common failure point for flippers (after bad ARV estimates). Key principles:
Finding Good Contractors
- Get referrals from other investors, not Google. Join local real estate investor groups (REIAs, BiggerPockets local meetups, Capital Ladder community) and ask who people use.
- Get 3 bids on every major scope of work.
- Verify license, insurance (general liability + workers' comp), and references.
- Start with a small project ($5,000–$10,000) before committing to a full rehab.
The Scope of Work Document
Before any work begins, create a detailed scope of work (SOW) that specifies exactly what will be done, with materials, brands, colors, and finishes identified. A vague SOW leads to disputes, change orders, and cost overruns. The SOW should be detailed enough that any contractor could bid on it without asking clarifying questions.
Payment Structure
- Never pay more than 10% upfront. Legitimate contractors do not need 50% deposits.
- Pay in draws tied to milestones: demo complete, rough-in complete, drywall complete, finish complete.
- Inspect each milestone before releasing payment.
- Hold 10% retainage until final punch list is complete.
The Flip Timeline
Time is money in flipping. Every day you hold the property, you are paying financing costs, insurance, taxes, and utilities. Target timelines:
- Cosmetic flip: 4–8 weeks rehab + 4–8 weeks on market = 2–4 months total
- Moderate rehab: 8–16 weeks rehab + 4–8 weeks on market = 3–6 months total
- Full gut: 16–26 weeks rehab + 4–12 weeks on market = 5–9 months total
Most first-time flippers underestimate the timeline by 30–50%. Permits take longer than expected. Materials are backordered. Contractors no-show. Inspections fail. Budget for delays by using the longer end of these ranges.
Holding Costs: The Silent Profit Killer
On a $200,000 property financed with a hard money loan at 12% + 2 points:
- Hard money interest: $2,000/month ($24,000/year)
- Origination points (2%): $4,000 (paid at closing)
- Property taxes: $250–$400/month
- Insurance: $150–$250/month
- Utilities: $150–$250/month
- Total holding costs: approximately $2,550–$2,900/month
On a 6-month project, that is $15,300–$17,400 in holding costs plus the $4,000 in points. This is why timeline discipline matters — every extra month costs nearly $3,000 in pure overhead.
Tax Implications: Short-Term Capital Gains
This is where many new flippers get an unpleasant surprise. Flipping profits are taxed as ordinary income, not long-term capital gains:
- Federal: Properties held less than 12 months are taxed at your ordinary income rate (up to 37% for the highest bracket in 2026)
- Self-employment tax: If the IRS considers you a “dealer” (flipping is your primary business activity), profits may be subject to an additional 15.3% self-employment tax (Social Security + Medicare). This is the single biggest tax trap for flippers.
- State income tax: Varies by state (0% in TX, FL, TN, WA; up to 13.3% in CA)
- No 1031 exchange: Properties held for sale (flips) do not qualify for 1031 like-kind exchanges. You cannot defer taxes on flipping profits.
- No depreciation: You cannot depreciate a property you intend to sell. Flips are inventory, not investment property.
Example: You earn $40,000 profit on a flip. You are in the 24% federal bracket and live in a state with 5% income tax. If classified as a dealer: $40,000 x (24% + 5% + 15.3% SE tax) = $17,720 in taxes. Your net profit: $22,280. The tax bite is real.
Strategies to Minimize Flip Taxes
- Flip through an S-Corp: Can reduce self-employment tax by paying yourself a reasonable salary and distributing remaining profits as S-Corp distributions (not subject to SE tax). Consult a CPA — this must be structured properly.
- Hold for 12+ months: If you can hold the property long enough to qualify for long-term capital gains treatment (and you are not classified as a dealer), you pay 15–20% federal instead of ordinary rates. This is difficult for flips but possible for longer projects.
- Offset with rental portfolio: Some investors maintain both a flipping business and a rental portfolio. Losses or depreciation from rentals can offset flipping income on the overall tax return. Consult a CPA experienced in real estate.
When Flipping Goes Wrong
- Bad ARV: You estimated $300K ARV but the property sells for $270K. Your $45,000 projected profit just became $15,000 or a loss.
- Rehab overruns: Budget was $40K, actual was $65K. Foundation issue, mold, termites, plumbing replacement — all common surprises.
- Market shift: You bought in a hot market, but by the time you list (4–6 months later), rates have risen and buyer demand has cooled. Days on market stretch from 14 to 60+.
- Contractor abandonment: Your contractor takes a deposit and disappears, or does substandard work that must be torn out and redone.
- Permit issues: You discover the property has unpermitted additions that must be addressed before sale. Cost and timeline both increase dramatically.
Sample Flip Analysis
Use our Flip Calculator to model your own scenarios.
- ARV: $280,000
- Purchase price: $165,000 (59% of ARV)
- Rehab budget: $42,000 (including 15% contingency)
- Closing costs (buy): $4,950
- Holding costs (5 months): $14,500
- Closing costs (sell, 7%): $19,600
- Total all-in cost: $246,050
- Gross profit: $33,950
- Taxes (estimated 35%): $11,883
- Net after-tax profit: $22,067
- ROI on cash invested (hard money, 15% down): 52%
The margins are real but thin. The $22,067 after-tax profit required 5 months of active work, significant project management, and $40,000+ in cash at risk. This is why the 70% Rule exists — it protects you when things go wrong.
Bottom Line
House flipping is a business, not a passive investment. It requires active deal sourcing, construction management, market analysis, and financial discipline. The returns can be excellent (20–50% annualized ROI on successful flips), but the failure rate is real: studies suggest 10–15% of flips break even or lose money.
Start with a cosmetic flip in a market you know well. Use the 70% Rule conservatively. Add 20% to your rehab estimate and 30% to your timeline estimate. And never, ever skip the ARV analysis.
Sources: ATTOM Data Solutions (flip rate and ROI statistics, 2024), IRS Publication 544 (Sales and Other Dispositions of Assets), IRC Section 1031 (like-kind exchanges), Freddie Mac PMMS, National Association of Realtors (closing cost estimates), RSMeans construction cost data. Rehab cost ranges are approximate national averages; actual costs vary by market, material quality, and labor availability. This guide is for educational purposes only and does not constitute investment, legal, or tax advice. Consult a CPA and real estate attorney before flipping. See our full disclaimer.