Paste a listing. Calculate the profit.
Enter the address and asking price below to get an ARV estimate, a starting repair number, a 70% rule max offer, and projected profit - in your browser, with no account and no card.
Enter a property. Get a quick deal estimate.
Add the address and asking price. You can include property details for a more useful starting estimate. No account or card required.
Your quick estimate runs in this browser. The full workspace can research comparable sales and property records.
Enter the address and asking price to see estimated value, repairs, offer range, and projected profit.
Your free workspace can research comparable sales, valuation sources, and tax records, then save the deal for later.
How the flip math works
Every fix-and-flip analysis answers the same three questions, in order:
The 70% rule compresses this into one line - offer at most 70% of ARV minus repairs - which is why it is a useful screen and a dangerous final answer. Six months of holding costs on a slow flip can eat the margin the rule assumed. The calculator above shows both the 70% rule number and an all-in max purchase figure.
A worked example
This is the real math from our sample analysis of 17 Woodlawn Ave, Holbrook, MA - a 4 bed / 2 bath colonial listed at $549,000. The 70% rule says the listing is roughly $113k over a flip-safe offer, which is exactly the kind of thing you want to know before you offer, not after you close. See the complete analysis in the sample deal report, or read the full 70% rule guide →
Common questions
Is this flip calculator really free?
Yes. The calculator on this page runs in your browser with no account and no card. A free Rehabfolio account adds AI comp research, tax records, and the ability to save the deal.
What is the 70% rule?
A quick screen for flip offers: pay at most 70% of the after-repair value (ARV) minus repair costs. On a $300,000 ARV with $40,000 of repairs, the max offer is $170,000. It is a starting point - the full analysis should include financing, holding, and selling costs.
How do I estimate ARV?
ARV comes from recently sold comparable properties: similar beds, baths, square footage, and condition, as close to the subject as possible. Rehabfolio's Web CMA researches comps with live web search and shows you the sources behind the number.
What costs does a full flip analysis include?
Purchase price, repairs with a contingency, financing costs, holding costs (interest, taxes, insurance, utilities), buying costs, and selling costs. Profit is what survives all six.
Can the calculator replace my judgment?
No. Every output is a draft estimate. Verify comps, walk the property, and get contractor input before making an offer.
Get comps and sources behind the number.
A free account runs the full Web CMA - comparable sales, tax records, and source links - and saves the deal so the analysis becomes your rehab budget if you buy.