Seller-Financed Note Arbitrage
Buy on one note. Sell on a better note. Keep the spread.
A slow flip is a deal you never rehab and never rent — you buy a property on seller financing, immediately resell it to a retail buyer on a second, higher-priced note, and collect the difference in cash flow and equity for years.
Free calculator · no account needed · 14-day full platform trial
$0
Down payment in example deal
~$181/mo
Cash flow while both notes run
~$63k
Total profit over full term
No rehab
No contractors, no renters
The strategy
What is a slow flip?
A normal flip needs cash, contractors, and a fast exit. A slow flip needs neither — you profit from the difference between two notes over time, instead of a single resale event.
Step 1 — You buy
Acquire the property on a note
A motivated seller carries the financing. You put down little or nothing and pay them monthly on a note you control — often at a below-market rate.
Example: $30,000 at 8%, 5-year seller note
→
Step 2 — You sell
Resell to a retail buyer on a better note
You sell the same property to an end buyer on seller financing — at a higher price and rate, with their down payment. You pocket the spread immediately and every month.
Example: $55,000 at 12%, 10-year buyer note
How it works
Four moves. No rehab crew required.
The whole strategy lives in the paperwork — the property doesn't change, only the paper on top of it.
01
Find a motivated seller
Target owners who'll carry the note — often distressed, inherited, or off-market properties bought well below retail.
02
Buy on their note
Put down little or nothing. The seller carries financing at your terms, and you own the note on a property worth more than you owe.
03
Resell to a retail buyer
Your buyer can't (or won't) get a bank loan. You sell on a second seller-financed note at retail price, a higher rate, and a real down payment.
04
Collect the spread
Bank the buyer's down payment minus yours, keep the monthly payment difference, and own the equity when the buyer's note pays down.
See it with real numbers
Example slow-flip deal
Every slow flip has two sides of the same property. Here's a representative deal — adjust your own in the free calculator.
719 Jackson Ave, Evansville, IN
Same property, two notes. Your profit is the difference between them.
Buy side — your note to the seller
Purchase price$30,000
Your down payment$0
Interest rate8%
Term5 years
Your payment~$608/mo
→
Sell side — buyer's note to you
Resale price$55,000
Buyer's down payment$5,000
Interest rate12%
Term10 years
Buyer's payment~$789/mo
$5,000
Upfront down-payment spread
~$181/mo
Cash flow, first 5 years
~$63,000
Total profit over full term
Why slow flips
Build a cash-flowing note portfolio without a rehab crew
Slow flips fit investors who want real estate cash flow and equity — without the flipping grind or landlord headaches.
💰
Little capital required
Seller financing means small or zero down payments. You're buying the paper, not the rehab.
🔧
No rehab, no contractors
The buyer takes the property as-is. You never swing a hammer or chase a crew.
📆
Steady monthly cash flow
You earn the spread between two payments every single month, for years — not one lump sale.
🏠
Buyers who can't use banks
Retail buyers with credit or income issues are your market. They pay premium rates for the chance to own.
📄
You control the paper
You hold both sides of the transaction. That means you set the terms, the rate, and the spread.
🧮
Underwrite it in seconds
Paste an address, set both notes, and the Back40 calculator shows your spread, cash flow, and total profit instantly.
Questions
Slow flips, demystified
Is a slow flip legal?
Yes — seller financing is a standard, legal way to buy and sell real estate in most states, as long as the notes are structured properly and comply with state usury and disclosure rules. Your attorney or title company can structure the two notes cleanly.
How much money do I actually need to start?
Often very little. Because the seller carries the financing, your down payment can be $0 to a few thousand dollars. You also need a little cash for closing costs and title work — but nowhere near a traditional flip or rental.
What if the buyer stops paying?
You hold the note, so you hold the leverage — you can foreclose and take the property back, keep the payments already made, and re-sell it to a new buyer on a new note. That's why underwriting the buyer and the property matters.
Is this the same as the slow-flip calculator?
The calculator is the free tool that shows you the numbers on any property. This page is the strategy behind it. Together they're part of the full Back40 platform, which helps you find deals, run comps, manage buyers, and track your notes.
Run your first slow flip
Paste any address, set your two notes, and see the spread, cash flow, and total profit in under a minute — free.
Back40
Slow Flip