Quick answer
Fix and flip is the strategy of buying a property, renovating it, and selling it for a profit. The business model is simple: buy below value, add value through renovation, sell at a higher price. The execution is harder.
The single most common beginner mistake in fix and flip is not a bad contractor or a slow market. It is paying too much for the property in the first place. If the purchase price is wrong, no amount of renovation can fix the deal.
Who this is for
This article is for new investors who are curious about flipping but have not done a deal yet. It covers how fix-and-flip profit is calculated, how to estimate after-repair value (ARV), how to think about rehab costs, and what makes the strategy riskier than it looks.
It does not cover buy-and-hold rentals or BRRRR. For a side-by-side strategy comparison, see Real Estate Investing Strategies Compared.
How fix and flip works
The mechanics have four stages:
- Acquire: Buy a distressed, outdated, or undervalued property below its post-renovation value.
- Rehab: Renovate to a standard that attracts buyers in the local market.
- List and sell: Put the finished property on the market and close a sale.
- Collect profit: What is left after purchase, rehab, holding costs, selling costs, and financing is profit.
The strategy is a short-cycle capital business, not a passive income strategy. A typical flip takes three to twelve months from purchase to close of sale. If the renovation takes longer, or the listing period runs long, holding costs keep accumulating.
The numbers that determine profit
Before making an offer on a flip, you need to estimate five things:
| Input | What it represents |
|---|---|
| ARV | Expected resale price after renovation |
| Rehab costs | Labor, materials, and contractor overhead |
| Holding costs | Taxes, insurance, utilities, debt service while you own it |
| Selling costs | Agent commissions, closing costs, title, transfer taxes |
| Purchase price | What you paid, including closing and acquisition costs |
Profit is what is left after you subtract all five from the resale price.
Example:
| Line item | Amount |
|---|---|
| ARV (resale price) | $290,000 |
| Purchase price | −$155,000 |
| Rehab costs | −$45,000 |
| Holding costs (7 months) | −$9,800 |
| Selling costs (7%) | −$20,300 |
| Gross profit | $59,900 |
That $59,900 is before your own time, any partnership costs, or taxes. It also assumes each input was estimated correctly. If rehab runs $10,000 over and the sale takes two extra months, profit shrinks fast.
How to estimate ARV
ARV is the estimated sale price for the property after renovation is complete. It is the most important number in a flip and the one easiest to get wrong.
For a full walkthrough of what makes a reliable comp, how to adjust for differences, and where to pull data, see Comps. In brief: use three to five closed comparable sales within 90 days, within a half mile, at similar size and condition. Use the midpoint of that range — not the top — as your ARV.
The ARV trap
New investors tend to use the highest recent sale they can find as their ARV. Sellers and wholesalers can do the same. That creates a deal that looks profitable on paper but does not survive contact with the actual market.
The safer approach: assume your resale price lands at the midpoint of your comp range, then test what happens if it is 5–10% lower.
How to estimate rehab costs
Rehab costs are one of the most unpredictable inputs in a flip. Beginners consistently underestimate them — see Rehab Costs for the full breakdown by category, a scoping template, and why verbal estimates are unreliable.
The critical rule: always walk the property with a contractor before making an offer. Break the scope into components, get at least two bids, and add a 15–20% contingency on top of your best estimate.
Beginners generally do better starting with light-to-medium cosmetic rehab where the scope (paint, flooring, fixtures) is visible and predictable. Heavy structural work — foundation, major systems, additions — carries cost uncertainty that is difficult to underwrite conservatively.
Building a deal pipeline: how to screen 20 deals to find 1
Most beginners analyze individual deals they stumble across. Experienced flippers run a pipeline: sourcing many deals simultaneously, screening quickly, and analyzing deeply only the ones that pass an initial filter.
The two-minute filter
Before building a full pro forma, screen every deal with a quick mental calculation:
If the market cannot support that ARV, skip the deal. No further analysis needed.
Example: Property asking $150,000, rough rehab estimate $40,000. Required ARV = ($150,000 + $40,000) ÷ 0.70 = $271,400. If renovated three-bedrooms in that neighborhood top out at $240,000, the deal fails the screen before you ever pull a comp.
What a real deal pipeline looks like
| Stage | What you do | Typical conversion rate |
|---|---|---|
| Leads (listings, direct mail, wholesalers) | Apply 2-minute screen | Pass: ~10–15% |
| Passed filter | Pull 3–5 real comps, refine ARV | Continue: ~30–40% |
| ARV confirmed | Build full profit calculation, walk property | Offer: ~20–30% |
| Offer made | Negotiate; accept or lose | Accepted: ~30–50% |
For every deal you close, you typically evaluate 15–30 leads. Building the pipeline habit before you have capital to deploy is what separates investors who get deals done from those who spend months analyzing one property at a time.
The 70% rule
The 70% rule is a quick screen for flips: offer no more than 70% of ARV minus estimated repair costs.
Formula: Maximum offer = (ARV × 0.70) − Rehab costs
Using the earlier example:
- ARV: $290,000
- Rehab: $45,000
- Maximum offer: ($290,000 × 0.70) − $45,000 = $203,000 − $45,000 = $158,000
The 70% factor reserves roughly 30% of ARV to cover holding costs, selling costs, and profit margin. The exact percentage is not a law—it is a starting point. In markets with lower transaction costs or very predictable rehabs, some investors work with 75%. In higher-risk markets or with less reliable rehab estimates, staying closer to 65% provides more cushion.
Use the 70% rule calculator as a first-pass screen, then verify with a full profit projection.
Maximum allowable offer (MAO)
MAO is a more precise version of the 70% rule that accounts for your specific holding, selling, and target profit inputs instead of using a flat percentage.
Formula: MAO = ARV − Rehab − Holding costs − Selling costs − Target profit
This gives you a defensible maximum bid based on your actual deal economics rather than a rule of thumb. Use the MAO calculation after you have a real rehab estimate and real holding cost numbers.
Holding costs
Holding costs are the monthly expenses you carry while you own the property. They accumulate every day until the sale closes.
Common holding costs include:
- Loan interest or hard money loan payments
- Property taxes (prorated monthly)
- Insurance
- Utilities
- HOA fees if applicable
- Maintenance during the holding period
A typical fix and flip might carry $1,200–$2,000 per month in holding costs depending on financing and market. If a renovation takes two months longer than planned, that can cost $2,400–$4,000 in unexpected expense.
Days on market and sale risk
Flips depend on selling the finished property. If the market softens or your price is above what buyers will pay, the property sits. Every day it sits, holding costs accumulate.
Check days on market data for the market and price range you are targeting before buying. A market where listings in your price band are sitting 90 days means more risk than one where they go under contract in two weeks.
Selling costs
Selling costs typically run 7–10% of the sale price — agent commissions, closing costs, title, transfer taxes, and any concessions. On a $290,000 sale, that is $20,300–$29,000. If you forget to model this, your profit projection is off by that full amount before you even consider rehab and holding costs.
See Selling Costs for a state-by-state breakdown of transfer taxes and a full worked example.
Contractor management: the execution variable nobody talks about
More flips fail because of contractor problems than because of bad ARV estimates. Bad estimates are usually caught before closing. Contractor problems emerge during the project, when your capital is committed and your holding costs are running.
What makes contractor management hard
- Scope creep: Contractors add work, sometimes without asking. Every change order costs money and time.
- Multiple active projects: Most contractors work several jobs simultaneously. Your project gets attention when theirs slow down.
- Payment sequencing: Paying too much upfront removes leverage. Paying too slowly delays the next phase.
- Hidden damage: Discoveries mid-demo (mold, rotted framing, outdated wiring) create new scope you could not see at the walkthrough.
How to reduce contractor risk
| Practice | Why it matters |
|---|---|
| Written scope before signing | Verbal agreements become disputes |
| Payment tied to milestones | Keeps contractor incentivized to finish each phase |
| Weekly site visits (or daily on heavy rehab) | Catches problems before they compound |
| Hold 10–15% until final walkthrough | Ensures punchlist items get done |
| Backup contractor on call | Timeline insurance if primary relationship breaks down |
When fix and flip makes sense
Fix and flip can work well when:
- You can estimate ARV accurately. You have access to good recent comps or a reliable local agent who can verify resale value.
- You have a realistic rehab estimate. Not a verbal ballpark—an actual scope breakdown with at least one contractor walkthrough.
- The purchase price leaves real margin. After applying your MAO calculation, you can still negotiate the property to a price that works.
- You have holding cost cushion. If the renovation runs long or the sale is slow, you can carry the costs without being forced to sell cheap.
- You understand the local market. Knowing which finishes buyers expect, which price bands move fastest, and what a comparable finished home actually looks like is a real edge.
When fix and flip does not make sense
- Rehab scope is unpredictable. Foundation issues, structural problems, mold, or unknown plumbing and electrical risk create cost uncertainty that is difficult to underwrite conservatively.
- Your ARV is based on one optimistic comp. If your deal only works at the top of the comp range, the margin is too thin.
- The local resale market is slow. High days on market, falling prices, or rising inventory in your price band increases holding cost risk.
- You are new to contractor management. Rehab projects require active oversight. Delegating to a contractor you cannot evaluate is risky.
Common beginner mistakes
Overpaying because of ARV optimism
The easiest way to hurt a flip is to use a high ARV to justify a high purchase price. Always test what happens if your sale price comes in 5–10% below your estimate.
Underestimating rehab
First-time flippers almost always underestimate rehab costs. Common misses include HVAC, electrical upgrades, hidden water damage, and code compliance. Add a contingency, then add a little more.
Ignoring holding costs
A flip with a tight margin can survive a smooth execution. It cannot survive a four-month renovation and a two-month listing period if holding costs were not in the model.
Modeling a fast sale
Use realistic days on market for the local market and price range, not what you hope. Optimistic sale timing is a subtle way to understate holding costs.
Skipping the full profit calculation
The 70% rule is a screen, not a business plan. Before going under contract, run a full profit calculation that includes ARV, purchase price, all rehab costs, every holding cost month, and complete selling costs.
FAQ
Is fix and flip a good strategy for beginners?
It can be, but it is more demanding than buy and hold. Success depends on accurate ARV, realistic rehab estimation, good contractor management, and enough reserve capital to handle delays. Beginners without construction experience should start with lighter rehab projects where scope is more predictable.
How much profit should I target?
A commonly cited rule of thumb is at least 10–20% of ARV, but the right target depends on your market, risk tolerance, capital cost, and the reliability of your estimates. The more uncertain your inputs, the higher your required margin should be.
What financing do most flippers use?
Options include conventional investment property loans, hard money loans, private money, and personal capital. Hard money is popular for flips because it closes fast and does not require owner-occupancy, but the costs are significant. Model the actual rate, fees, and term before assuming it makes sense for your deal.
Do I need a contractor before I make an offer?
Ideally yes, or at least a walkthrough with someone who can spot major cost surprises. A verbal estimate from someone who has not seen the property is not reliable enough to base an offer on.
What happens if I cannot sell the property?
If a flip does not sell, you either reduce the price, convert it to a rental, or hold longer while carrying costs. None of these is free. Having reserve capital and a backup plan before you buy is part of responsible deal structure.
Next steps
Before analyzing a flip, estimate ARV from real comps, break down the rehab by component, and calculate a full profit projection.
Useful tools:
- Fix and Flip Profit Calculator — full profit projection with all inputs
- 70% Rule Calculator — quick MAO screen
For a comparison of fix and flip against rental strategies, see Real Estate Investing Strategies Compared.
This article is for education only and is not financial, legal, tax, or investment advice. Consult qualified professionals before buying property.