The 70% Rule Explained for New Fix-and-Flip Investors

In fix-and-flip real estate, you make your money when you buy, not when you sell. Read that again. It’s the single most important principle that separates profitable flippers from those who flame out after one bad deal. Overpaying for a property is the original sin of flipping, and it’s a mistake that no amount of beautiful staging or savvy marketing can fix.

So, how do you avoid it? How do you walk into a distressed property and know, with confidence, the absolute maximum price you can offer? You use a guardrail. A simple, powerful formula that has kept disciplined investors in the black for decades: the 70 percent rule.

This isn't just a random guideline; it's a foundational underwriting tool. Mastering it means building a protective buffer into every deal, forcing you to account for the costs, fees, and unforeseen problems that inevitably pop up. Forget emotion. Forget a seller’s sob story. The 70 percent rule is your North Star for making data-driven offers that protect your capital.

What is the 70 Percent Rule?

The 70 percent rule is a core principle in real estate investing that provides a quick and effective way to determine the Maximum Purchase Offer (MPO) you should make on a potential flip. It’s not magic; it’s math designed to ensure there's enough room in the deal for all your costs plus a reasonable profit.

Think of it as a sanity check. It prevents you from getting caught up in a bidding war or falling in love with a property’s “potential” while ignoring the harsh realities of its numbers.

The Formula: (ARV x 0.70) – Rehab Costs = MPO

Let’s break this down into its three critical components:

ARV (After-Repair Value): This is the estimated market value of the property after* you’ve completed all the renovations. It’s what you expect the house to sell for in perfect, move-in-ready condition.

* Rehab Costs: This is the total estimated cost of all labor and materials required to get the property to its ARV. This includes everything from a new roof and kitchen cabinets to paint, flooring, and landscaping.

* MPO (Maximum Purchase Offer): This is the result of the formula—the highest price you should pay for the property to make the deal financially viable.

By multiplying the ARV by 70%, you’re immediately setting aside a 30% margin. This margin is crucial, and we’ll get into exactly what it covers shortly. For now, just know that it’s your safety net. Your profit, holding costs, and selling fees all live inside that 30%.

Deconstructing the 70 Percent Rule Formula

A formula is only as good as its inputs. Garbage in, garbage out. If your ARV is wrong or your rehab budget is a fantasy, the 70% rule won't save you. Nailing these two numbers is 90% of the battle.

Finding the ARV (After-Repair Value)

This is the single most important number in your entire calculation. Getting it wrong can sink the project before it even starts. The ARV is not a guess; it's a data-backed estimate based on comparable sales (or "comps").

A comp is a recently sold property that is similar to your target property in location, size, age, bedroom/bathroom count, and style. To find an accurate ARV, you need to:

1. Pull Recent Sales: Look for comps that have sold within the last 3-6 months.

2. Stay Hyper-Local: The best comps are in the same subdivision. The next best are within a half-mile radius.

3. Compare Apples to Apples: The comps must be similar in Square Footage (within 10-15%), bed/bath count, and style (e.g., don't compare a one-story ranch to a two-story colonial).

4. Look at Renovated Properties: Your comps should be properties that have been updated to a similar standard you're planning for your flip.

Do not rely on Zillow's "Zestimate" for your ARV. It’s an algorithm, not a professional valuation. The best way to get a bulletproof ARV is to work with a Realtor who can pull fresh comps directly from the MLS. Better yet, analyze the comps yourself using a powerful tool like the [FlipRuns property analyzer](/) to see the raw data and make your own informed decision.

Estimating Your Rehab Costs

The second major variable is your renovation budget. New flippers almost always underestimate this number. A vague "I think it needs about $30k" is a recipe for disaster.

You need a detailed Scope of Work (SOW) that lists every single task, from demolition to final paint touch-ups. Walk the property with at least two general contractors to get written bids. If you're doing the work yourself, you still need to price out every single material and assign a value to your own time.

Always add a contingency fund of 10-20% on top of your final estimate. You will find unexpected issues once you open up walls—termite damage, outdated wiring, plumbing leaks. Your contingency is not an "if," it's a "when." If your rehab quote is $50,000, your budget should be at least $55,000.

The "30%": What It Really Covers

Many beginners think the 30% cushion in the 70 percent rule is all profit. This is a catastrophic mistake. That 30% chunk has a lot of jobs to do before you get paid. It covers:

* Financing Costs: Points and interest on your hard money loan.

* Holding Costs: Property taxes, insurance, and utilities for the 4-6 months you own the property.

* Buying & Selling Costs: Closing costs on both the purchase and the sale, which can easily be 2-3% on each side.

* Realtor Commissions: Typically 5-6% of the final sales price, paid by you, the seller.

Your Profit: This is what’s left over after* all the expenses above have been paid. In a typical deal, this might be 10-15% of the ARV.

When you see it broken down, that 30% gets eaten up fast. This is why the 70% rule is so effective—it forces you to account for these easily forgotten “soft costs” from day one.

The Rule in Practice: Real-World Examples

Let’s run the numbers on a couple of hypothetical deals to see the rule in action.

Example 1: The Bread-and-Butter Flip

You find a dated but solid single-family home in a good neighborhood. After analyzing comps, you determine the ARV is $400,000. You walk the property with your contractor, who quotes you $65,000 for a full cosmetic renovation (kitchen, baths, flooring, paint, fixtures).

Let's apply the 70 percent rule:

* ARV: $400,000

* ARV x 0.70: $280,000

* Subtract Rehab Costs: $280,000 - $65,000

* Maximum Purchase Offer (MPO): $215,000

The seller is asking $225,000. Because you’ve done your homework, you can confidently offer $215,000 and explain that this is the highest number that works based on the required renovations. If they accept, you’ve bought yourself a deal with a built-in $120,000 margin ($400k ARV - $215k purchase - $65k rehab) to cover costs and profit.

Example 2: The Deal to Walk Away From

A wholesaler brings you an "amazing deal" on a townhouse. They claim the ARV is $320,000. The property needs significant work, which you estimate at $50,000. The asking price is $205,000.

At first glance, it might seem okay. But let's run the formula:

* ARV: $320,000

* ARV x 0.70: $224,000

* Subtract Rehab Costs: $224,000 - $50,000

* Maximum Purchase Offer (MPO): $174,000

The math shows your absolute maximum offer should be $174,000. The seller's asking price of $205,000 is $31,000 over what the deal can support. This is a hard pass. Paying their price would wipe out your entire profit margin and then some. This is the power of the rule: it provides the discipline to walk away.

Is the 70 Percent Rule a Hard-and-Fast Rule?

No, it's a guideline—a very, very good one. Experienced investors sometimes adjust the percentage based on market conditions, the type of project, and their business model.

When to Adjust the Percentage

* Hot Markets: In a rapidly appreciating seller's market, competition is fierce. To secure a deal, you may need to increase your offer by flexing to a 75% or even 80% rule. However, you are consciously eating into your own margin and taking on more risk. You must be 100% confident in your ARV and rehab numbers to do this.

* Cold Markets: In a buyer's market with high inventory and slow sales, you might tighten up and use a 65% rule to build in an even larger safety cushion against longer holding times and potential price drops.

* Light Cosmetic Flips: If a property only needs $10,000 in paint and carpet, your timeline is shorter, holding costs are lower, and risk is minimized. You might feel comfortable using a 75% rule.

For new flippers, the advice is simple: stick to the 70% rule for your first several deals. It will protect you from yourself. Once you have a few successful projects under your belt, you can start to understand the nuances of when and how to adjust. A great way to game out these scenarios is with a dedicated [70 percent rule calculator](/70-percent-rule-calculator) that lets you tweak the variables instantly.

The Bottom Line

The 70 percent rule isn't a secret code; it's a simple framework for making smart, profitable decisions in the high-stakes game of fix-and-flip investing. It forces you to bake in a margin for financing, closing costs, holding costs, and—most importantly—your profit.

Your job as an investor is to find properties where the numbers work. Don't try to force a deal by fudging your ARV or underestimating repairs. Trust the math. Use the 70 percent rule as your primary filter, and you’ll dramatically increase your chances of building a sustainable and profitable flipping business.

FAQ

Does the 70 percent rule account for closing costs and realtor commissions?

Yes. These expenses are paid out of the 30% gross margin that the rule sets aside. This common misconception is why many new flippers get into trouble. The 30% is not pure profit; it's a bucket of money that must cover all holding costs, financing fees, buying/selling costs, commissions, and then your net profit.

If I do the rehab work myself, can I ignore labor costs?

No. This is a classic rookie mistake. Your time has value. You should pay yourself a fair hourly wage and include that in your "Rehab Costs" budget. If you don't, you aren't calculating your true profit; you're just working for free. Additionally, if you get injured or can't finish the project, you need to have the funds available to hire a professional to complete the job.

Is the 70 percent rule still useful in a hot market where properties sell quickly?

It's more crucial than ever. A hot market can create a sense of FOMO (Fear Of Missing Out) and tempt you to overpay just to get a deal. The 70 percent rule is the discipline that keeps you grounded. While you might need to adjust to 75% or higher to be competitive, you do so knowing you are explicitly reducing your profit margin and safety net. It turns a hopeful guess into a calculated risk.

Can I just use Zillow’s “Zestimate” for the ARV?

Absolutely not. A Zestimate is an automated valuation model that is often inaccurate and should never be used for a serious investment decision. Your ARV must be based on a thorough analysis of recent, hyper-local, and truly comparable sales (comps), preferably pulled directly from the MLS by a qualified real estate agent or through a professional-grade analysis platform.