Free repossession (installment) calculator
Enter installment payments received, gross profit ratio, and repossession costs — this repossession (installment) calculator computes recognized gain under IRC §453B, updated live, as you type.
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No prepayment penalty assumed. Contact your lender to confirm extra payments apply to principal.
Results are estimates. Consult a professional.
How the installment-sale repossession calculator works
When a seller reports a sale on the installment method (Form 6252) and later repossesses the property because the buyer defaults, IRC §453B requires the seller to recognize gain on the cancelled installment obligation. This calculator computes that gain, which is based on the difference between the value the seller recovers (payments already received plus the FMV of the property at repossession) and the tax basis of the installment obligation plus repossession costs.
The obligation basis is the portion of payments received that represents the seller's unrecovered cost — essentially the cost ratio embedded in each dollar collected. A gross profit ratio of 40% means 60% of every payment is return of basis; that 60% is the obligation basis. On repossession, the seller must reconcile what they actually received (payments + FMV of property back) against the basis they are giving up (the obligation basis) and the costs incurred, recognizing any net gain.
IRS — Publication 537, Installment Sales; IRC §453B, Gain or Loss on Disposition of Installment Obligations.Worked example: $200k installment sale, $80k received, then repossession
A seller sold investment property for $200,000 using the installment method. The seller's adjusted basis was $120,000, producing a gross profit of $80,000. The buyer paid $80,000 before defaulting. Repossession costs were $4,000. The property's FMV at repossession is $150,000.
Recognized gain by gross profit ratio and payments received — $4k repo costs
The table below shows recognized gain for varying gross profit ratios (30%, 40%, 60%) and payments received before default ($30k, $60k, $90k), assuming repossession costs of $4,000 and a property FMV at repossession of $90,000. All figures are illustrative.
| Gross profit ratio | Payments received | Obligation basis | Recognized gain |
|---|---|---|---|
| 30% | $30,000 | $21,000 | $95,000 |
| 30% | $60,000 | $42,000 | $104,000 |
| 30% | $90,000 | $63,000 | $113,000 |
| 40% | $30,000 | $18,000 | $98,000 |
| 40% | $60,000 | $36,000 | $110,000 |
| 40% | $90,000 | $54,000 | $122,000 |
| 60% | $30,000 | $12,000 | $104,000 |
| 60% | $60,000 | $24,000 | $122,000 |
| 60% | $90,000 | $36,000 | $140,000 |
Gain = payments received + FMV ($90k) − obligation basis − repo costs ($4k). Source: IRC §453B; IRS Publication 537.
Tips for installment-sale repossessions
The gain on an installment-sale repossession can be substantial — and largely unavoidable — because the FMV of the recovered property counts as value received. Planning ahead and meticulous record-keeping are essential.
- Track cumulative installment receipts precisely. Each year's Form 6252 shows gross profit recognized; the cumulative total determines the obligation basis on repossession. Missing or incorrect figures produce wrong gain calculations.
- Get a qualified appraisal on repossession day. FMV enters the gain formula as a positive item — the higher the FMV, the larger the gain. A defensible, contemporaneous appraisal establishes FMV and withstands IRS scrutiny.
- Document every repossession cost. Legal fees, court filing costs, property reconditioning, storage, and remarketing expenses all reduce gain. Keep receipts dated at or around the repossession event.
- Consider the timing of repossession. If the calendar year matters for your other income, discuss with your CPA whether the repossession can occur in a more favorable tax year — gain is recognized in the year possession is retaken.
- Real property has different rules. For repossession of real property sold on the installment method, special §1038 rules — not §453B — apply and may cap your recognized gain. Use the repossession of real property calculator for those situations.
Accuracy and limitations
This calculator applies the IRC §453B gain formula for installment obligations as described in IRS Publication 537. It correctly incorporates the gross profit ratio to derive obligation basis, includes FMV of the recovered property as value received, and reduces gain by documented repossession costs. It does not model depreciation recapture (§1245/§1250), which converts a portion of the gain to ordinary income, nor the 3.8% Net Investment Income Tax that may apply above certain thresholds. State tax conformity to federal installment-sale and repossession rules varies significantly.
Not tax or legal advice. Installment-sale repossessions require coordinated reporting across multiple tax years, basis-tracking spanning the entire installment period, and careful analysis of any depreciation recapture. Tax outcomes depend on facts unique to your transaction. Always consult a licensed CPA or tax attorney before filing or structuring a repossession. This tool is educational only and does not substitute for professional tax counsel.
Installment-sale repossession terms defined
About this installment-sale repossession calculator
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