How a Pro Flipper Actually Calculates Profit
TLDRThe offer formula is simple: max allowable offer plus rehab plus profit equals after repair value; the hard part is setting the profit number. Percents alone do not work because they break down at the price extremes. Use a minimum lump sum floor, adjust for risk using the scale of livability, and separate your lender income from your investor income.
Table of Contents
- The Basic Offer Formula
- Why Percents Break Down
- The Three Factors That Matter
- Using the Scale of Livability for Risk
- Stop Counting Every Paycheck as Investor Profit
- FAQ
The Basic Offer Formula
The max allowable offer formula is one line:
Max allowable offer + rehab + profit = ARV
If you are buying a house for $200,000, putting $50,000 into it, and selling for $300,000, your profit is $50,000. On $250,000 of cash in the deal, that is a 20 percent margin.
That is the number most people chase. Twenty percent return on money in. Sometimes they hear 15 percent is fine. Sometimes they hear 17 percent. Someone tells them 20 percent is a home run. All of those answers are kind of right and kind of useless, because percents alone do not tell you whether a deal is good.
The formula is the easy part. Setting the profit number is the work.
Why Percents Break Down
Two real examples from my own deals. Names of the properties and exact addresses are not the point. The numbers are.
Deal one. Cosmetic renovation. Acquired for $21,000 and all in at $51,000. It was probably the best deal I have ever bought. The windows were boarded, with mattresses, used syringes, and human waste inside. But the electrical, plumbing, and mechanical systems worked. The job was mainly a cleanout, paint, and flooring.
Deal two. Huge renovation. Took the roof off, built a second story. Acquired for $350,000. Rehab $250,000. All in at $600,000.
Now apply the classic 20 percent rule to both.
| Deal | All In | 20% Target | Lump Sum |
|---|---|---|---|
| Cosmetic | $51,000 | 20% | $10,000 |
| Second story | $600,000 | 20% | $120,000 |
On the cosmetic, 20 percent is $10,000. That was not enough for me. On the second story, 20 percent is $120,000. I would have taken that return because I actually lost money on that project.
Same percent, two completely different outcomes. The formula is incomplete.
Common MistakeCopying a percent rule from somebody else’s YouTube video without thinking about your price point. The 20 percent rule works great in the middle of the range and falls apart on both ends.
The Three Factors That Matter
When I set a profit number, I think through three things in order.
One. Minimum lump sum. My rule of thumb is $30,000 per deal, or 10 percent of cash in, whichever is higher. On the cosmetic $51,000 deal, I rounded $30,000 to a 60 percent return on cash. On the $600,000 second-story deal, 10 percent is $60,000.
Two. Risk profile. I look at how close the house is to livable when I buy it and how much work separates me from the next buyer.
Three. Lending structure. Whether I am using hard money, private money, or cash, and how I account for interest and points in the formula.
Those three levers set the profit input that goes into the max allowable offer formula.
| Factor | What It Changes |
|---|---|
| Price point | Whether to use minimum lump sum or percent |
| Risk profile | How much cushion to add to the profit target |
| Lending | Whether to count your own interest as a separate paycheck |
Percent is a starting point. Lump sum is a floor. Risk pushes you above the floor. Lending tells you what you are actually earning.
Using the Scale of Livability for Risk
The scale of livability is how I visualize risk on any deal.
Imagine a line. On the right side is livable, where ordinary buyers may be able to use retail financing. On the left side is not livable, where that financing and buyer pool can narrow sharply.
The distance from your starting point to the livability line is your risk. Every job between the two points is a chance for something to go wrong, blow the budget, or add months to the timeline.
| Project in the source | Position and risk |
|---|---|
| Livable cosmetic rehab | Close to being sold or rented again |
| Roof-off second-story addition | Farther from the livability threshold |
| New build | Farthest from the threshold; Ross avoids it |
On a cosmetic house that is already livable, I may accept less profit because I can sell or rent it sooner. On a second-story addition, I require more room because there is much more work between the purchase and a livable exit.
Key ConceptMonetize means you can either sell it or rent it. The closer you are to monetization on day one of ownership, the less risk the deal carries. New construction is the furthest from monetization, which is why I do not build from scratch.
The scale is a way to compare construction risk. It does not replace a full scope, actual bids, financing terms, or local due diligence.
Stop Counting Every Paycheck as Investor Profit
This is the trap that kept me undercounting my costs for years.
If you fund your own deal, you have two roles: investor and lender. If you manage your own construction, that is a third role: contractor. Ross also gave examples in which the operator is paid as a wholesaler or a licensed real estate agent.
Each role is a separate business with a separate paycheck.
| Role | Paid As |
|---|---|
| Investor | Profit on the flip |
| Lender | Interest in the source example; add actual charges separately |
| Contractor | Cost plus markup (say 20%) |
| Wholesaler | Assignment fee |
| Agent | Commission |
People say, “That is a great deal for you because you do the construction.” And I used to nod along. In reality, that statement means you are getting paid as the contractor and not as the investor, which means one of your businesses is losing money while the other looks fine.
The source makes the lender split concrete. On $250,000 at 12% annual interest, Ross calculated $2,500 per month, or $15,000 over a six-month hold. He said points would also be likely but did not include them in that example. If the operator funds the deal, that $15,000 is lender income. It is not a substitute for the investor’s $30,000-or-10% target.
Pro TipOn every deal, list the roles you are actually playing. Pay each role separately in your mental accounting. A deal that only pays your contractor self is a bad investor deal, even if the total cash looks okay.
For example, a $250,000 deal where the rehab is $50,000. If I am the contractor on that job at cost plus 20 percent, my contractor paycheck is roughly $10,000. That is separate from the $30,000 minimum I expect as the investor. Separate again from interest if I funded it myself. Run the math this way and you will find that some deals you thought were great were really just you working for yourself at an hourly rate.
A deal has to pay your investor self. Every other paycheck is a bonus, not a substitute.
FAQ
How do I know if a deal hits my minimum when I am just starting out?
The source rule is my $30,000 floor or 10% of cash in, whichever is higher, then more room as the work moves left on the scale of livability. It specifically explains why a flat 20% rule breaks at the price extremes.
What if I do not have cash and need hard money?
Build the actual financing cost into the deal. In the source calculation I used 12% interest for six months and said I was not including points. If your lender charges points or other fees, add the documented terms rather than pretending the source example included them.
Why 10 percent and $30,000 as minimums?
The source presents them as Ross’s rule of thumb. It does not claim they are universal thresholds. Project risk, price point, and actual financing still change the decision.
Does this change for BRRRR rentals?
The source does not give a BRRRR formula. It is a flip-profit lesson. A refinance-and-hold exit needs its own underwriting.
What is the difference between profit margin and annualized return?
The source does not calculate annualized return. It compares a percentage target with a lump-sum floor and then adjusts the required room for construction risk.