SmartHelping / Seller Financing / Excel
Seller Financing Financial Model & Tax Calculator
Evaluate the economics of purchasing an asset and reselling it with seller financing. Connect the initial cost, sale price, down payment, and loan terms to seller cash flows, IRR, and modeled tax effects.

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Video walkthrough & spreadsheet preview
Walk through the seller-financed investment.
Model update
See the added loan structures.
This walkthrough covers the addition of interest-only loans and term loans with repayment before the end of the amortization schedule.
Core deal assumptions
Build the transaction from cost through repayment.
Initial cost and selling price
Enter the original cost of the asset and the price at which you sell it. Compare the future cash receipts with the seller’s initial investment.
Down payment and financed balance
Set the buyer’s down payment and review the resulting amount financed under the seller-financed sale.
APR and amortization
Define the annual percentage rate and amortization period in years to establish the payment structure.
Payment frequency and start date
Set payments per year and the first payment date so the schedule reflects the timing of the transaction.
Payment structures
Compare the supported loan types.
Amortizing loan
Model principal and interest repayments over the defined amortization period.
Interest-only loan
Evaluate a structure with interest-only payments using the added loan-type option.
Term loan
Use an amortization schedule with an earlier repayment term to model a payoff before the full amortization period ends.
Seller-level economics
Review the cash flows from the perspective of the investor who bought the asset and then sold it with seller financing.
Cash flow & returns
Measure the return against the initial investment.
Monthly cash-flow summary
Follow the timing of the seller’s cash flows and the modeled tax effects through the monthly view.
Annual cash-flow summary
Review the same economics by year, making it easier to compare transactions and consolidate multiple schedules.
Internal rate of return
Use the final IRR output to evaluate how the repayment cash flows perform against the initial cost.
A complete single-tab schedule
Keep the inputs, calculations, and summaries together for easier use and duplication.
Tax calculation framework
Separate repayment of basis, gain, and interest.
Monthly and annual summaries include modeled tax effects. The simplified calculation is a planning framework; eligibility, contract-price adjustments, and depreciation recapture can affect actual installment-sale reporting. See IRS Publication 537 for the rules.
Gain allocation in the model
The simplified calculation described for this template divides the sale price less cost basis by the sale price. That percentage allocates the gain portion of principal receipts.
Gain versus tax
The gain allocated to a payment is the amount used to calculate tax on that gain. The tax amount is calculated separately using the applicable tax rate.
Return of basis
The model distinguishes recovery of the seller’s investment basis from the gain component of principal receipts.
Interest income
Interest is considered separately from principal and its gain/basis allocation, so the summaries can reflect different tax treatment.
Using the single-tab design
Move from one deal to a set of seller-financed investments.
Enter the economics of the sale
Set the initial cost, selling price, down payment, and resulting financed amount.
Configure repayment terms
Choose the loan structure and enter the APR, amortization period, payment frequency, first payment date, and applicable term assumptions.
Review the seller’s cash flows
Inspect the monthly and annual summaries, modeled tax effects, and final IRR.
Duplicate for additional transactions
Copy the tab for each additional transaction. Keep the same annual start year across copies, adjust the payment start date for each deal, and aggregate the annual views as needed.
Who this model is for
Built around the seller’s investment perspective.
Investors and asset sellers
Evaluate the cash-flow implications of buying an asset and reselling it under a seller-financed repayment structure.
Comparing transaction terms
Change the price, down payment, interest rate, or loan structure to understand how the modeled cash flows and return change.
More templates in one purchase
Explore the bundles that include this model.
The Seller Financing Model is included in the Real Estate and Lending bundles, as well as the complete Super Smart collection.
Real Estate Financial Models
Explore templates for property investment, acquisition, and financing.
Explore the templateLending & Credit Models
Explore financial models for loan businesses, portfolios, and financing structures.
Explore the templateSuper Smart Bundle
Explore the complete public SmartHelping financial model collection.
Explore the templateAdditional reading & tools
Explore the supporting resources.
Questions before you start
A few useful details.
Whose perspective does the model show?
The model shows the perspective of the investor who purchased the asset and then sold it using seller financing.
Which loan types are included?
The model supports an amortizing loan, an interest-only loan, and a term loan with repayment before the full amortization period ends.
Can I set the payment frequency and first payment date?
Yes. Payments per year and the first payment date are among the core inputs.
Are the results shown monthly and annually?
Yes. Both views include cash-flow summaries and modeled tax effects, with a final IRR output for the investment.
Can I analyze several transactions?
Yes. Duplicate the tab for each deal, keep the annual view on the same start year, and vary the payment start dates as needed. You can then aggregate the annual views.
Does the model estimate tax effects?
Yes. The template includes simplified tax calculations in the monthly and annual summaries. Actual installment-sale reporting depends on the transaction and applicable rules; the spreadsheet does not determine eligibility for installment treatment.
Is everything on one tab?
Yes. The model’s logic is contained on one tab so it can be duplicated for additional transactions.
How is the model delivered?
The $45 one-time purchase provides an immediate Excel download. It is also included in the bundles listed above.
Evaluate the economics of seller financing
Connect the initial cost, repayment terms, and return.
Seller Financing Financial Model & Tax Calculator — $45, one-time purchase.