Updated July 30, 2026. Quick answer (2026): Selling before two years does not forfeit the exclusion when the move is for employment, health, or unforeseen circumstances. Section 121(c) prorates the CAP by months over 24 – it does not prorate the gain.
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Selling early does not always forfeit the exclusion
The widely repeated version of the rule — live there two years or get nothing — is wrong. Section 121(c) provides a reduced exclusion for a taxpayer who fails the requirements, where the sale is by reason of a change in place of employment, health, or unforeseen circumstances.
The fraction, exactly as written
The reduced cap bears the same ratio to the full cap as “the shorter of (I) the aggregate periods, during the 5-year period ending on the date of such sale or exchange, such property has been owned and used by the taxpayer as the taxpayer’s principal residence; or (II) the period after the date of the most recent prior sale or exchange by the taxpayer to which subsection (a) applied…” bears to “2 years.”
In the ordinary case that is simply months over 24. Fourteen months of ownership and use on a joint return gives a cap of $500,000 × 14/24 = $291,667 — which covers a great many early sales completely. The second branch matters only if you used the exclusion on another home recently.
It prorates the cap, not the gain
This is the distinction that decides the number. The fraction reduces the exclusion ceiling, not the gain itself. A couple with a $152,000 gain after fourteen months and a qualifying reason excludes all of it, because $152,000 sits under the $291,667 reduced cap. The proration only bites when the gain is large relative to the shortened period.
Without a qualifying reason, the cap is zero
The same couple, selling at fourteen months because they simply changed their minds, gets no exclusion at all — not a prorated one. The entire $152,000 is taxable. That cliff is why the qualifying-reason question is worth taking seriously rather than assuming.
Related
Methodology
- Exclusion caps, the 2-of-5 test, the nonqualified-use allocation, the reduced-exclusion fraction and the depreciation carve-out are taken from the text of 26 U.S.C. 121. The 3.8 percent rate and its thresholds are from 26 U.S.C. 1411. Both were read on 2026-07-30.
- Section 121 caps and Section 1411 thresholds are written in the statute as fixed dollar amounts with no indexing mechanism, so they are built in. Long-term capital gain brackets ARE indexed annually, so your rate is an input rather than a lookup.
- Figures were computed by two independently written engines that agree to the cent, and the calculator on this page reproduces both exactly.
- Federal only. State treatment varies and some states do not follow the federal exclusion.
Educational estimate, not tax advice, and not a filed return. Federal only. Confirm anything that changes a filing decision with a CPA or tax attorney.
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