Updated July 31, 2026. Quick answer: IRC §2032 lets an estate value everything as of 6 months after death instead of the date of death — but only if the election reduces BOTH the gross estate value AND the estate tax owed. It exists for one scenario: markets fell after the death. And it carries a cost almost every summary omits: the heirs’ stepped-up basis drops to the lower value too, which converts an estate-tax saving into a future capital-gains bill for the beneficiaries.
The mechanics
The election is made on the estate tax return, covers the whole estate (no cherry-picking dates asset by asset), and anything sold or distributed during the six months is valued as of its disposal date, not month six. Because both tests must be met, the election is useless to estates owing no tax — a portability-only filer cannot use it to shrink the survivor’s numbers.
Who should actually check it
Taxable estates heavy in marketable securities or real estate, where a market drop after the death is real and measurable. The comparison to run: estate tax saved today versus capital gains created for heirs tomorrow at the lower basis — a family in the 0–15% capital-gains brackets keeps more of the trade than one in the top bracket. The basis side of the ledger, computed: inherited home sale capital gains. The whole calendar: the deadlines calculator.
A six-month snapshot with a two-generation price tag.
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The number that surprises people who bought a long time ago
Downsizing is the one home sale where the gain is usually large and the exclusion usually still covers it. A couple who bought in 1994 for $180,000 and sell at $760,000 with $46,000 of selling costs have a realized gain of about $534,000 before improvements. That is above the $500,000 joint cap — but decades of capital improvements are exactly what brings it back under, and most sellers have never added them up.
Improvements are the lever, and the records are the constraint
A new roof, an addition, a replaced HVAC system, new windows, a finished basement: these add to basis. Repainting and repairs do not. Thirty years of improvements on a family home routinely total six figures, and every dollar of it reduces the gain dollar for dollar. The practical problem is documentary, not legal — the seller who kept receipts pays less than the identical seller who did not.
Why downsizers should check the net investment income tax separately
A retiree with modest ordinary income can still be pushed over the 3.8 percent NIIT threshold by the sale itself, because taxable gain is net investment income. The thresholds are $250,000 on a joint return and $200,000 otherwise, written into Section 1411(b) as fixed figures with no indexing. A sale that produces $120,000 of taxable gain on top of $180,000 of other income crosses the joint threshold and picks up 3.8 percent on the part above it.
The move itself may change the tax
Downsizing usually means moving, and sometimes across a state line. Some states tax the gain the federal exclusion just removed. If the sale and the move are in the same year, the order of the two matters, and it is worth checking the destination state before signing.
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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