Seller finance calculator
Balloon math, total seller interest, side-by-side vs a bank loan.
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$
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yr
yr
Set 0 for no balloon (fully amortizing).
%
Seller-financed deal
Monthly payment
$2,642
Balloon in 5 yr
$342,251
Due to seller
Interest through balloon
$140,745
Total to seller
$540,745
Balance over time — balloon marked at year 5
Seller finance vs bank loan
Seller @ 8%
$2,642
/ mo · $590,959 lifetime interest
Bank @ 7%
$2,395
/ mo · $502,232 lifetime interest
Seller costs $246/mo more — worth it only if bank financing isn't available or the seller is flexible on down/qualifying.
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How this works
Seller financing is a real estate purchase where the seller acts as the bank — carrying a note for part or all of the price at an agreed interest rate, usually with a balloon payoff after 3–7 years.
Seller financing means the seller acts as the bank. Payments amortize as if it were a full loan, but a balloon can force the entire remaining balance due after a shorter period (commonly 3–7 years) — the buyer either refinances or sells.
The balloon amount is the loan balance at the balloon month based on standard amortization at the seller's rate.