Section 121 Exclusion Explained

What This Includes

Internal Revenue Code Section 121 allows a homeowner to exclude a substantial amount of capital gain from the sale of a primary residence from federal taxable income. A single filer can exclude up to two hundred fifty thousand dollars of gain, and a married couple filing a joint return can exclude up to five hundred thousand dollars, provided both spouses meet the use requirement even if only one spouse meets the ownership requirement. This exclusion is one of the most valuable tax benefits available to individual homeowners and does not require reinvesting the proceeds into another home.

Qualification depends on two tests measured over the five year period ending on the date of sale. The ownership test requires that the seller owned the home for at least two years during that period, and the use test requires that the seller used the home as a primary residence for at least two years during the same period. The two years do not need to be continuous, and short absences, such as vacations, generally do not interrupt the use test. The exclusion is generally available once every two years for the same taxpayer.

Complications arise when a home was used for something other than a full time primary residence during part of the ownership period. If a portion of the home was rented out, such as a basement apartment or a home office claimed for tax purposes, or if the home was converted to a rental for a period before sale, the exclusion may need to be prorated between qualifying and nonqualifying use, and any depreciation claimed during a rental period is subject to recapture regardless of the exclusion. Internal Revenue Code Section 121(d)(10) also addresses situations where a taxpayer previously deferred gain into the home through a 1031 exchange, generally requiring a five year ownership period before the Section 121 exclusion becomes available on that property.

We help Albuquerque, NM homeowners confirm whether they meet the ownership and use tests, calculate any proration needed for mixed personal and rental use, and understand how the exclusion interacts with depreciation recapture and any prior 1031 exchange history on the property.

What We Deliver

Review of ownership and use history against the Section 121 tests

Calculation of excludable gain and any gain remaining after exclusion

Proration analysis for homes with mixed personal and rental use

Identification of depreciation recapture exposure from any rental period

Review of Section 121(d)(10) waiting period issues for prior 1031 exchange property

Guidance on timing multiple home sales around the two year exclusion limit

Estimate of New Mexico state tax on any gain not excluded

Coordination with the homeowner's tax advisor on final reporting

Common Situations

An Albuquerque, NM homeowner is selling a longtime primary residence and wants to confirm the full gain will be excluded under Section 121.

A homeowner in Albuquerque, NM rented out a portion of their home for several years and needs the exclusion calculated on a prorated basis.

An owner in Albuquerque, NM previously acquired their current home through a 1031 exchange and wants to know when the Section 121 exclusion becomes available.

FAQs about Section 121 Exclusion Explained

How much gain can I exclude under Section 121?

Up to two hundred fifty thousand dollars for a single filer, or up to five hundred thousand dollars for a married couple filing jointly, as long as the ownership and use tests are met. We help Albuquerque, NM homeowners confirm eligibility before selling.

What are the ownership and use tests?

You generally must have owned the home for at least two years and used it as your primary residence for at least two years, both measured within the five year period ending on the date of sale. We help Albuquerque, NM sellers review their timeline against these tests.

Can I use the exclusion more than once?

Generally yes, but not more than once every two years for the same taxpayer with respect to any home sale. We help Albuquerque, NM homeowners plan the timing of multiple home sales around this limit.

What happens if I rented part of my home before selling it?

The exclusion may need to be prorated between the portion of the property and time period used as a primary residence and the portion used as a rental, and any depreciation claimed on the rental portion is subject to recapture. We help Albuquerque, NM homeowners calculate this proration.

Does the exclusion apply if I previously did a 1031 exchange into this home?

Section 121(d)(10) generally requires a five year ownership period before the exclusion becomes available on a home that was acquired through a 1031 exchange. We help Albuquerque, NM owners confirm whether this waiting period has been satisfied.

Do I need to reinvest the excluded gain into another home?

No, the Section 121 exclusion does not require reinvestment. It is a straightforward exclusion from taxable income, unlike a 1031 exchange, which requires reinvestment in like-kind property to defer gain. We help Albuquerque, NM homeowners understand this difference.

Compliance and Limits

Educational content only. Not tax, legal, or investment advice. The primary residence exclusion is governed by Internal Revenue Code Section 121, including the special rule in Section 121(d)(10) for property previously acquired through a Section 1031 exchange. New Mexico taxes any gain not excluded under its graduated state income tax brackets. Consult with a Qualified Intermediary and a qualified tax advisor before relying on this exclusion.