You got a number. Maybe it came from a form you filled out online, maybe from a postcard you finally called back, maybe from a walkthrough that took twenty minutes. Now you’re staring at it and asking the only question that matters: is this cash offer fair?
That question deserves a real answer built on actual numbers, not a vague “trust us” from whoever handed you the offer. This guide gives you the formula, the math, and the red flags so you can judge whether a cash offer is fair for yourself, without relying on anyone’s reassurance.
Why “Fair” Doesn’t Mean the Same Thing as Retail Price
The most common mistake homeowners make when judging whether a cash offer is fair is comparing it directly to what Zillow says the house is worth, or what a similar home down the street listed for.
That comparison isn’t apples-to-apples. A cash offer reflects the home’s current condition, is made without an agent, without a mortgage contingency, and often without any repairs at all. A retail listing price reflects the home after it’s been repaired, staged, marketed for weeks or months, and sold to a buyer who’s financing the purchase and expects move-in-ready condition.
To judge whether a cash offer is fair, you need to compare it against what you’d actually walk away with in a traditional sale, not the sticker price on the listing. That net number, after commissions, repairs, and months of carrying costs, is almost always lower than sellers expect, and it’s the real benchmark that determines whether a cash offer is fair.
The Real Formula Behind Every Cash Offer
Every legitimate cash buyer arrives at a number using some version of the same formula. Understanding it is the single fastest way to know whether a cash offer is fair on your own home.
Offer = After Repair Value (ARV) minus repair costs minus holding and selling costs minus a reasonable profit margin.
Here’s what each piece means. ARV is what your home would sell for on the open market once it’s fully repaired and updated, based on recent comparable sales in your neighborhood. Repair costs are the realistic cost of bringing your home to that fully updated condition, including materials, labor, and permits.
Holding and selling costs cover what the buyer pays while they own the property: property taxes, insurance, utilities, and the eventual cost of reselling it, including commissions if they list it through an agent. The profit margin is what the buyer needs to make the deal worth the risk and the capital they’re tying up.
Run through a simple example. If your home’s ARV is 200,000 dollars, it needs 40,000 dollars in repairs, and the buyer’s holding and selling costs run another 20,000 dollars, a reasonable offer with a 10 to 15 percent margin would land somewhere between 110,000 and 120,000 dollars.
That may look far from the 200,000-dollar ARV, but it’s the math, not a lowball, and it’s exactly why a cash offer is fair or unfair depending on whether the underlying numbers are honest.
What Percentage of ARV Should You Expect
Once you understand the formula, the next question is what percentage of after-repair value is normal. Most reputable cash buyers land somewhere between 65 and 85 percent of ARV, depending on the home’s condition, the local market, and how much work it needs.
A home that only needs paint and cleanup will land toward the higher end of that range. A home needing a new roof, updated electrical, and a full kitchen gut will land lower, because more of the ARV gets consumed by repair costs before the buyer ever sees a profit.
If an offer comes in well below 50 percent of ARV with no clear repair estimate to justify it, that’s a signal worth questioning. A cash offer is fair when the gap between ARV and the offer can be explained by real repair numbers and real holding costs, not when the gap is simply as large as the buyer thinks they can get away with.
How to Calculate Your Own ARV Before You Accept Anything
You don’t have to take anyone’s word for your home’s after-repair value. You can build a rough estimate yourself before you ever compare it against an offer.
#1. Pull recent sales of similar homes in your immediate neighborhood, ideally within the last three to six months and within a half mile of your property.
#2. Match on square footage, bedroom and bathroom count, and lot size as closely as possible, since these have the biggest impact on comparable value.
#3. Look specifically at homes that sold in fully updated, move-in ready condition, since ARV assumes your home has been brought to that same standard.
#4. In Cook County, the Assessor’s Office offers a free tool for exactly this kind of research. The Find Comparable Properties tool lets you pull recent comparable sales by neighborhood, property class, square footage, and age, which gives you a solid, publicly verifiable starting point.
#5. Once you have a realistic ARV range, get a rough repair estimate from a contractor for the work your home actually needs, so you can run the formula yourself and see whether a cash offer is fair against your own numbers.
Running the Traditional Sale Math for Comparison
The other half of knowing whether a cash offer is fair is understanding what a traditional sale would actually net you, not just what it would list for. Sellers frequently compare a cash offer to a listing price and feel shortchanged, without accounting for everything that gets subtracted between listing and closing.
#1. Agent commissions typically run 5 to 6 percent of the sale price, split between the listing and buyer’s agents.
#2. Repair costs to make the home market-ready often run into the thousands, sometimes tens of thousands, depending on condition.
#3. Homes on the market for 60 to 90 days accumulate real carrying costs: mortgage payments, taxes, insurance, and utilities.
#4. Buyer-requested repairs after inspection frequently reduce the final sale price further, even after the home has already been fixed up once.
#5. Closing costs, title fees, and seller concessions typically account for another 1 to 3 percent of the sale price.
Once you subtract all of that from the listing price, the traditional sale net is often much closer to the cash offer than sellers initially assume. If the gap between the two numbers is roughly 10,000 to 20,000 dollars, the cash offer is fair territory, and the speed and certainty of a cash sale may make it the stronger choice even without matching the traditional net exactly.
Red Flags That Signal You’re Being Lowballed
Not every cash offer is fair, and knowing the warning signs protects you from buyers who are counting on you not doing the math.
#1. The buyer refuses to explain how they arrived at the number. A legitimate buyer can walk you through their ARV estimate and repair costs. If they won’t, that’s a problem.
#2. There’s heavy pressure to sign today or the offer disappears. Real cash offers don’t need artificial urgency to be worth taking.
#3. The buyer asks for money upfront before making an offer or before closing. Legitimate cash buyers make their money at closing, not from fees charged to you beforehand.
#4. The buyer has no verifiable local track record, no reviews, and no physical address you can find.
#5. The offer is dramatically below even the low end of the typical 65 to 85 percent of ARV range, with no repair estimate to justify the gap.
These patterns line up closely with tactics the Federal Trade Commission warns consumers about across industries: pressure to act immediately, refusal to explain the math, and upfront payment demands. If you believe you’ve encountered outright fraud or deceptive practices in a real estate transaction, the Illinois Attorney General’s Consumer Protection Division accepts complaints and can point you toward next steps.
Questions to Ask Before You Accept Any Offer
Before signing anything, ask the buyer these questions directly. How the buyer answers tells you almost as much as the number itself.
#1. What comparable sales did you use to determine the ARV of my home?
#2. Can you break down your repair cost estimate line by line?
#3. Are there any fees I’m responsible for at closing?
#4. How many homes have you closed on in this area in the last year?
#5. Is this offer contingent on anything, and if so, what?
A buyer who answers these clearly and specifically is showing you a cash offer is fair through transparency, not just through a number on a page.
When a Below-Market Offer Is Still the Right Call
Sometimes the math shows a real gap between a cash offer and the traditional sale net, and the cash offer is still the better decision. This is common for sellers dealing with foreclosure, where speed matters more than maximizing every dollar.
It’s also common for inherited property and homes going through probate, where sellers may not have the time, local presence, or desire to manage repairs and showings. Sellers navigating divorce or a tenant-occupied rental situation often land in the same position. In these cases, a cash offer is fair not because it matches the traditional sale net dollar for dollar, but because the certainty and speed carry real value that a spreadsheet alone doesn’t capture.
How Sell To Dynasty Calculates Its Offers
At Sell To Dynasty, the goal is to make sure every seller understands exactly why a cash offer is fair before they ever sign anything. Offers are built using the same ARV, repair cost, and holding cost formula outlined above, using real comparable sales from the Chicago Southland and Northwest Indiana markets, not guesswork.
You can read more about the reasoning behind the approach on the Why We Buy page, and see the full range of property conditions accepted on the What We Buy page. If you’ve already received an offer from another buyer and aren’t sure it’s a fair one, the blog post on what sellers should know before accepting an offer covers additional details worth reviewing before you sign anything.
The full process is outlined on the How It Works page, and answers to common seller questions are available on the FAQ page.
Get a Real Number to Compare
You don’t have to guess whether a cash offer is fair, and you shouldn’t have to take anyone’s word for it either. Pull your own comps, run the formula, compare it against a realistic traditional sale net, and ask direct questions before you sign.
If you want a transparent, no-pressure number to run through this same math, request a free cash offer from Sell To Dynasty or call or text (219) 319-1916. You’ll get a real explanation of how the number was calculated, so you can decide for yourself whether the cash offer is fair for your situation, not just take someone’s word for it.