Owner Financing Payment Calculator
Work out the monthly payment, total interest, and balloon balance for any set of seller-financing terms you want to test.
Enter the terms you want to test
The schedule the payment is calculated on
Leave blank if there is no balloon
Result of your calculation
Enter a purchase price, an interest rate, and a term to see a calculated payment.
What this calculator is, and what it isn't
- It is a math tool. It runs a standard amortization calculation on figures you type in. Change an input and the output changes. Nothing is looked up, and nothing is saved.
- It is not an offer or a quote. No rate, payment, down payment, or term shown here is being offered to you by Ownerfi or by any seller.
- It does not reflect any particular property. In owner financing the price, down payment, interest rate, term, and whether there is a balloon are set by the individual seller and are negotiable. Two homes on the same street can be structured completely differently.
- It is not a credit decision. Entering numbers here does not qualify, pre-qualify, or approve anyone for anything, and a real deal will include costs this calculator does not model — closing costs, servicing fees, and whatever the specific agreement adds.
- It is not advice. This is general information, not legal, tax, or financial advice. Before signing anything, have the documents reviewed by a licensed attorney in the state where the property sits.
How the calculation works
Owner financing uses the same amortization formula as a bank mortgage. The amount financed is the purchase price minus the down payment. That balance, the interest rate, and the number of months in the amortization schedule produce a fixed monthly payment where early payments are mostly interest and later ones mostly principal.
The part people get wrong is the balloon. A balloon does not change the monthly payment — the payment is still calculated over the full amortization. What the balloon changes is when the loan ends: on the balloon date the entire remaining balance is due at once. On a note amortized over 30 years with a balloon at year five, roughly ninety percent of the original balance is still outstanding when the balloon arrives, which is why buyers plan to refinance or sell before that date.
What the terms mean
- Purchase price — the agreed sale price. In owner financing this is negotiated between buyer and seller like any other sale.
- Down payment — paid to the seller at closing. It reduces the financed balance directly, so it moves the monthly payment more than any other input.
- Interest rate — set by the seller, subject to whatever usury cap the state imposes. It is not tied to a published index the way a mortgage rate is.
- Amortized over — the schedule the payment is calculated on, commonly 20 or 30 years.
- Balloon — the date the remaining balance comes due in full, if the note has one.
Common questions
Does this calculator show the terms of a specific home?
No. It only calculates on the numbers you type in. It does not look up any listing, and no figure it shows is being offered by Ownerfi or by any seller. In owner financing the price, down payment, rate, term and balloon are set by the individual seller and are negotiable.
Why does a balloon not lower the monthly payment?
Because the payment is calculated over the amortization schedule, not over the balloon period. A note amortized over 30 years with a balloon at year 5 has the same monthly payment as a plain 30-year note — you just owe the remaining balance as a lump sum in year 5 instead of continuing to pay it down.
What is not included in this calculation?
Closing costs, title fees, any servicing fee, late fees, and anything specific to an individual agreement. Property tax, insurance and HOA are included only if you enter them. A real closing statement will differ.
Is a 0% interest rate realistic?
It happens, most often in family sales, and the calculator handles it. The IRS may impute interest on a below-market note, so a 0% structure has tax consequences worth asking an accountant about before you rely on it.
How is this different from a mortgage calculator?
The amortization math is identical. What differs is where the terms come from: a mortgage rate is quoted by a lender against published pricing, while an owner-financing rate is whatever a particular seller agrees to. That is why this tool asks you to supply the rate rather than suggesting one.