# Seller Financing Amortization Calculator Model owner-financed loan amortization schedules, balloon payments, and installment sale capital gains tax benefits for seller financing deals. --- - **Canonical URL:** https://dothecalculation.com/calculators/seller-financing-calculator - **Category:** Real Estate & Property - **Publisher:** Do The Calculation (https://dothecalculation.com) - **Cost:** Free, no account or sign-up required - **Privacy:** Runs entirely in the browser; inputs are never sent to a server - **Methodology:** https://dothecalculation.com/methodology --- ## Seller Financing Amortization Calculator Model owner-financed mortgages, balloon payments, interest income, and installment capital gains tax benefits. - Amortization schedules with custom balloon terms - Calculate total interest earned by the seller - Model installment tax deferral benefits ## The Mechanics of Seller Financing **Seller financing** (or owner financing) is a transaction where the seller acts as the lender, financing the purchase for the buyer instead of requiring a bank mortgage. The buyer makes monthly principal and interest payments directly to the seller based on a promissory note. To keep payments affordable for the buyer while allowing the seller to cash out, owner-financed notes often use a long amortization period (e.g., 30 years) with a shorter **balloon payment** term (e.g., 5 to 7 years). At the balloon date, the buyer must refinance or sell the property to pay the remaining loan balance. From a tax perspective, seller financing is treated as an **installment sale** under IRS Section 453. Instead of paying capital gains taxes in the year of the sale, the seller pays taxes proportionally as they collect principal payments, deferring their tax liability. ## Installment Sale Profit Calculations Under installment sale rules, the seller determines their **Gross Profit Ratio**: $$\text{Gross Profit} = \text{Sale Price} - \text{Adjusted Cost Basis}$$ $$\text{Gross Profit Ratio} = \frac{\text{Gross Profit}}{\text{Sale Price}}$$ For each payment collected, the capital gains portion is calculated as: $$\text{Taxable Capital Gain} = \text{Principal Collected} \times \text{Gross Profit Ratio}$$ All interest income collected is taxed as ordinary income in the year it is received. All depreciation recapture must be reported and taxed in the year of the sale, regardless of when payments are collected. ## How to Use This Calculator Enter the property sale price, the buyer's down payment, the note's interest rate, and the amortization term (often 30 years, to keep the monthly payment low). Set the balloon term — the number of years until the buyer must pay off (or refinance) the remaining balance in full. Add the seller's original cost basis, any depreciation recapture claimed while owning the property, and the applicable capital gains tax rate. The calculator returns the monthly payment, the balloon payment due, total interest earned, and a comparison between the tax owed in year one under installment-sale rules versus paying all capital gains tax upfront in a standard sale. ## Worked Example: A $250,000 Owner-Financed Sale A seller sells a $250,000 property with a $50,000 down payment, financing the remaining $200,000 at 7% interest, amortized over 30 years with a 5-year balloon. The monthly principal-and-interest payment comes to about $1,331. Over the 60 months before the balloon, the buyer pays roughly $68,099 in interest and pays down about $11,737 of principal, leaving a balloon payment of about $188,263 due at the end of year 5. The seller's original cost basis was $100,000, so gross profit on the $250,000 sale is $150,000 — a 60% gross profit ratio. Under installment-sale rules, only the down payment's capital-gain portion is taxed in year one: $50,000 × 60% = $30,000 of taxable gain, taxed at the 15% capital gains rate for a year-one tax bill of about $4,500. By comparison, a standard (non-installment) sale with $20,000 of depreciation recapture would trigger roughly $27,500 in total tax due immediately ($22,500 in capital gains tax on the full $150,000 gain plus a simplified 25% recapture charge on the $20,000 recapture amount) — the installment structure defers most of that liability until later payments (and the balloon) are collected. ## Related Calculators Compare owner financing against a conventional purchase-money mortgage with the [Mortgage Calculator](/calculators/mortgage-calculator), or check whether paying points to buy down a conventional rate makes sense with the [Mortgage Points Break-Even Calculator](/calculators/mortgage-points-break-even-calculator). If the buyer plans to pay off the balloon faster than scheduled, the [Biweekly Mortgage Payoff Calculator](/calculators/biweekly-mortgage-payoff-calculator) shows how accelerated payments cut total interest. Sellers weighing a like-kind exchange instead of an installment sale should also review the [1031 Exchange Tax Calculator](/calculators/1031-exchange-tax-calculator). ## Frequently asked questions ### What is seller financing? Seller financing is a transaction where the seller extends a loan to the buyer to cover the purchase price, and the buyer makes monthly payments directly to the seller. ### How does a balloon payment work in seller financing? A balloon payment requires the buyer to pay off the remaining loan balance as a lump sum at a specific date (usually 5 to 7 years into the loan), often funded by refinancing. ### What is an installment sale for tax purposes? An installment sale allows a seller to report capital gains proportionally over time as they collect principal payments, rather than paying all taxes in the year of the sale. ### How is the Gross Profit Ratio calculated? Divide the gross profit (sale price minus adjusted basis) by the sales price. This percentage determines the taxable portion of each principal payment collected. ### Is interest income from seller financing taxable? Yes. The interest portion of each monthly payment is taxed as ordinary income in the year it is received. ### What happens if the buyer defaults on a seller-financed note? The seller can foreclose on the property to regain ownership, keeping the down payment and any payments made up to the date of default, subject to state foreclosure laws. ### Do I have to pay depreciation recapture upfront in an installment sale? Yes, IRS rules require that all depreciation recapture be reported and taxed in the year of the sale, regardless of the installment payment schedule. ### What is a Dodd-Frank compliance check in seller financing? The Dodd-Frank Act regulates owner financing. If a seller finances multiple properties a year, they must hire a licensed mortgage loan originator (RMLO) to evaluate the buyer's ability to repay. ### Can the buyer refinance to pay the balloon payment? Yes, refinancing is the most common way buyers pay off balloon balances, using the equity built up during the note term. ### What is a contract for deed? Contract for deed (or land contract) is a form of seller financing where the seller retains the legal title to the property until the buyer pays off the loan balance in full. ## Related concepts - **Installment Sale (IRS Form 6252)** — The tax form used to report installment sale income, capital gains, and deferred liabilities. - **Promissory Note** — A legal document representing a promise to pay, outlining the interest rate, payment terms, and default remedies. - **Foreclosure** — The legal process by which a lender takes control of a property after the borrower defaults on their mortgage. ## Related guides - [Mortgage Guide: Payment Formula, Costs, and PMI](https://dothecalculation.com/blog/finance/mortgage-guide) — Understand how mortgage payments work, what the DTC mortgage calculator includes, and how taxes, insurance, PMI, and loan term affect cost. - [House Flipping Guide: How to Calculate ARV, 70% Rule, and Profit Margin](https://dothecalculation.com/blog/property/house-flipping-guide) — Underwrite house flips with professional precision. Learn how to calculate after-repair value (ARV), maximum allowable offer (MAO), repair contingency, and financing drag. ## Related calculators - [Biweekly Mortgage Payment & Payoff Accelerator](https://dothecalculation.com/calculators/biweekly-mortgage-payoff-calculator) — Compare biweekly versus monthly mortgage payment schedules to calculate how much faster you pay off your loan and total interest saved. - [HELOC Payment & Draw Calculator](https://dothecalculation.com/calculators/home-equity-line-of-credit-heloc-calculator) — Simulate variable-rate HELOC payments, including interest-only draw period payments and later principal-and-interest repayment schedules. - [Mortgage Discount Points Break-Even Calculator](https://dothecalculation.com/calculators/mortgage-points-break-even-calculator) — Calculate the break-even timeline and total interest savings from paying upfront mortgage discount points to buy down your interest rate. - [HECM Reverse Mortgage Calculator](https://dothecalculation.com/calculators/reverse-mortgage-payment-calculator) — Estimate HECM reverse mortgage principal limits, available lump sum proceeds, and monthly tenure payment options for eligible homeowners. - [1031 Exchange Tax Deferral Calculator](https://dothecalculation.com/calculators/1031-exchange-tax-calculator) — Calculate capital gains tax liability, depreciation recapture, and adjusted basis when deferring taxes through an IRS Section 1031 exchange. - [Commercial Debt Yield & DSCR Calculator](https://dothecalculation.com/calculators/debt-yield-commercial-calculator) — Calculate commercial mortgage debt yield, debt service coverage ratio, and maximum underwritten loan amount for commercial property financing. --- _This calculator is designed for educational and planning purposes only. Real estate valuations, operating expenses, tax treatment (including 1031 exchanges and installment sales), mortgage interest rates, and loan underwriting criteria vary widely by market, property type, credit profile, and local regulations. Always consult a licensed real estate broker, CPA, tax attorney, or financial advisor before making investment decisions._ --- _Source: [Do The Calculation](https://dothecalculation.com/calculators/seller-financing-calculator). Quote freely with attribution and a link to this page._