What is the §121 home sale exclusion?

Taxpayers can exclude up to $250,000 ($500,000 MFJ) of gain from the sale of a principal residence if they: (1) owned the home for at least 2 of the last 5 years; and (2) used the home as their principal residence for at least 2 of the last 5 years. The exclusion can be used once every 2 years. [IRC §121]

How does depreciation recapture affect a home sale?

If the home was ever used for business or rental purposes, depreciation claimed (or allowable) must be recaptured as ordinary income (§1250 unrecaptured gain), even if the overall gain is excluded under §121. The recaptured depreciation is taxed at a maximum rate of 25%. The §121 exclusion does NOT apply to the depreciation recapture portion.

When must Form 1099-S be filed?

Form 1099-S must be filed for most real estate transactions. Exceptions: (1) the seller certifies the total sales price is $250,000 or less AND the property is the seller's principal residence; (2) the transaction is a like-kind exchange under §1031; (3) the transaction involves a corporation, government entity, or exempt organization.

How is an installment sale of real estate reported?

If the seller receives payments over multiple years, the installment method (Form 6252) spreads the gain over the payment period. The gross profit percentage (gain ÷ contract price) is applied to each payment received. Depreciation recapture must be reported in full in the year of sale, regardless of payments received. [IRC §453]

What happens when a 1031 exchange fails?

If a 1031 exchange fails (e.g., replacement property not identified within 45 days or not acquired within 180 days), the entire transaction is taxable in the year the relinquished property was sold. The taxpayer must report the gain on Schedule D and Form 8949. Qualified intermediary funds held in escrow are released to the taxpayer and treated as boot.

IRS Form — Real Estate Proceeds

Form 1099-S — Proceeds From Real Estate Transactions

Form 1099-S is issued by the closing agent (title company, attorney, or real estate broker) to report the gross proceeds from the sale or exchange of real estate. For tax professionals, Form 1099-S is the trigger to analyze the §121 primary residence exclusion, depreciation recapture on rental property, and installment sale elections.

✓ Verified 2026 Form 1099-S Rules

✓ §121 Exclusion Rules Confirmed

✓ Depreciation Recapture Rules Confirmed

✓ Installment Sale Election Rules Confirmed

$250K/$500K

§121 Primary Residence Exclusion (Single/MFJ)

Box 2

Gross Proceeds — Not Net Gain

Depreciation

Recapture — Taxable Even with §121 Exclusion

IRC §121

Primary Residence Exclusion Authority

Key Rules and Authority

Rule	Detail
§121 Exclusion (Single)	$250,000
§121 Exclusion (MFJ)	$500,000
Ownership Test	2 of last 5 years
Use Test	2 of last 5 years
Depreciation Recapture	Taxable even with §121 exclusion
Installment Sale	Election available for non-primary residence

§121 Exclusion — Key Rules and Traps

The §121 exclusion allows homeowners to exclude up to $250,000 ($500,000 MFJ) of gain from the sale of their primary residence. To qualify, the taxpayer must have owned and used the home as their primary residence for at least 2 of the 5 years before the sale. Key traps: (1) Depreciation recapture — if the client ever used the home as a rental or home office and claimed depreciation, the depreciation recapture (§1250 unrecaptured gain) is taxable at up to 25% even if the remaining gain is excluded; (2) Non-qualified use — gain allocated to periods of non-qualified use (rental periods after 2008) is not excludable; (3) Partial exclusion — if the client does not meet the 2-year test due to a job change, health issue, or unforeseen circumstance, a partial exclusion is available.

Frequently Asked Questions

My client sold their home for a $600,000 gain and they are married. How much is taxable?

If the client meets the §121 ownership and use tests (owned and used as primary residence for 2 of the last 5 years), $500,000 of the gain is excluded (MFJ). The remaining $100,000 is taxable as long-term capital gain (assuming held over 1 year). If the client claimed depreciation for a home office or rental period, the depreciation recapture is taxable first (before the exclusion applies). For example: if the client claimed $20,000 of depreciation, the $20,000 is taxable as §1250 unrecaptured gain (up to 25% rate), and then $500,000 of the remaining gain is excluded, leaving $80,000 taxable as long-term capital gain.

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Form 1099-S — Proceeds From Real Estate Transactions

Key Rules and Authority

§121 Exclusion — Key Rules and Traps

Frequently Asked Questions

Master Real Estate Sale Tax Planning for Your Clients

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Form 1099-S — Proceeds From Real Estate Transactions

Key Rules and Authority

§121 Exclusion — Key Rules and Traps

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Master Real Estate Sale Tax Planning for Your Clients

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