IRS Installment Sale Rules
Understanding Section 453, AFR requirements, and how to properly structure seller financing for optimal tax treatment.
Current AFR Rates (April 2026)
IRS Source3 years or less
4.64%
Short-term AFR
Over 3 years but not over 9 years
4.22%
Mid-term AFR
Over 9 years
4.49%
Long-term AFR
The installment method under IRC Section 453 allows sellers to defer recognition of gain on the sale of property when at least one payment is received after the year of sale. Instead of recognizing all gain in the year of sale, the seller recognizes gain proportionally as payments are received.
Eligible Property
- At least one payment must be received after the tax year of sale
- The property cannot be publicly traded stock or securities
- The property cannot be inventory or stock in trade
- The seller cannot be a dealer in the type of property sold
- Can be used for real estate, businesses, equipment, and other qualifying property
Ineligible Property
- Inventory or dealer property
- Publicly traded stocks or securities
- Depreciable property sold to related parties (special rules)
- When seller elects out of installment method
Gross Profit Ratio
The Gross Profit Ratio determines what percentage of each payment is taxable gain. It is calculated as: Gross Profit ÷ Total Contract Price. The gross profit is the selling price minus the adjusted basis (cost plus improvements minus depreciation).
Gross Profit Ratio = (Sale Price - Adjusted Basis) ÷ Total Contract PriceBenefits
- • Defer taxes by spreading gain over multiple years
- • Potentially lower tax brackets in future years
- • Interest income in addition to principal
- • Better cash flow management for large transactions
- • May help avoid Medicare surtax thresholds
Considerations
- • Interest portion is taxed as ordinary income
- • Depreciation recapture is recognized in year of sale
- • Cannot use for all property types
- • Related party rules may restrict deferral
- • Future tax rate changes could affect benefit
The IRS requires that installment sales charge at least a minimum interest rate, known as the Applicable Federal Rate (AFR). If the stated interest rate is below the AFR, the IRS will "impute" (assign) additional interest, treating part of the principal as interest income to the seller.
Consequences of Below-AFR Rate
If stated interest is below the AFR, the IRS recharacterizes a portion of each payment as interest. This results in: (1) More ordinary income to the seller, (2) Less capital gain, and (3) Potentially more interest deduction for the buyer. Proper documentation and adequate interest avoids these complications.
Exceptions
- Sales of $3,000 or less (no interest required)
- Sales between $3,000 and $250,000 may use 9% test rate
- Land sales between related parties up to $500,000
- Qualified opportunity zone investments (special rules)
- Some farm property transfers
Sales to related parties (family members, controlled entities) have special rules under IRC Section 453(e) and 453(g). These rules are designed to prevent tax avoidance through resale of installment obligations.
Restrictions
- If related party resells within 2 years, seller may recognize deferred gain
- Depreciable property sold to related party cannot use installment method
- Related parties include: spouse, children, grandchildren, parents, siblings
- Related entities include: corporations/partnerships where >50% ownership
- Constructive ownership rules apply
Exceptions to Resale Rules
- Death of original seller or buyer
- Involuntary conversion (e.g., condemnation)
- Second sale is also an installment sale
- Sales where tax avoidance is not a principal purpose
Gain from installment sales is typically capital gain (if the property was a capital asset held over 1 year), which receives preferential tax rates compared to ordinary income. However, depreciation recapture is taxed differently.
Short-Term Gains
Ordinary income rates (10%-37%) for property held 1 year or less
Long-Term Gains
0%, 15%, or 20% depending on taxable income bracket for property held over 1 year
Depreciation Recapture
For depreciable property (like rental real estate), depreciation taken is "recaptured" and taxed at ordinary income rates (up to 25% for real property under Section 1250). This recapture is generally recognized in full in the year of sale, not deferred.
AFR rates are updated monthly. Always verify current rates on IRS.gov.
Tax Disclaimer
This information about IRS installment sale rules is provided for educational purposes only and does not constitute tax advice. Tax laws are complex and change frequently. Always consult a qualified tax professional or CPA before making decisions about seller financing arrangements. The IRS has specific rules that may affect your situation differently.