THE HORIZON
Same man, same April afternoon in 2027, two versions of the same brokerage sale. In the first, he sells a long-held stock position and owes 15 percent on the gain, landing squarely inside the standard bracket.
In the second, because he timed the sale against a threshold that moved this October, part of that same gain falls into the 0 percent bracket instead. Both versions are ordinary and livable, but one keeps several thousand more dollars working.
The threshold that separates them was published this week, buried inside a routine IRS inflation announcement.
THE EVENT
On October 9, 2025, the Internal Revenue Service released its annual inflation adjustments for tax year 2026, including higher income thresholds for the long-term capital gains brackets. The 0 percent bracket, the 15 percent bracket, and the 20 percent bracket all shifted upward to account for inflation.
The same release raised dozens of other figures, including ordinary income tax brackets, the standard deduction, and eligibility limits for the earned income tax credit. The IRS adjusts these figures every year using a statutory inflation formula.
Separately, the One Big Beautiful Bill Act, signed into law July 4, 2025, made permanent the higher estate and gift tax exemption levels first set by the 2017 Tax Cuts and Jobs Act, rather than allowing them to sunset as originally scheduled. For 2026, the estate and gift tax exemption rises to roughly $15 million per individual and $30 million per married couple.
Tax advisers writing in The Tax Adviser's October 2025 issue noted that removing the sunset uncertainty reshapes estate planning conversations that had been on hold for years.
THE PATH
The first consequence lands directly on brokerage account sales. A married couple filing jointly with taxable income under roughly $96,700 in 2026 can realize long-term capital gains at a 0 percent federal rate, a threshold that rose from the 2025 level to account for inflation.
A builder nearing retirement, with lower earned income in a given year, can harvest gains from a taxable brokerage account inside that 0 percent window, an opportunity that widens slightly every year the bracket adjusts upward.
The second consequence sits inside estate planning for anyone with a business or real estate holdings likely to appreciate substantially. With the exemption permanently set near $15 million per individual, a builder building a business now worth $3 million has far more room to grow that value tax-free at death than existed under the pre-2025 sunset scenario.
That permanence changes whether it makes sense to gift business interests or real estate into a trust now versus waiting, since the urgency created by the old sunset deadline has been removed.
The third, less obvious consequence touches Roth conversion planning. Higher capital gains brackets and a permanent estate exemption together reduce the tax cost of converting traditional IRA balances to Roth in a given year, since a builder can better predict his marginal bracket for the next decade rather than planning around a cliff that no longer exists.
A conversion strategy built five years ago around the old 2025 sunset date should be revisited, since the assumptions behind it changed materially in July and were reinforced by October's inflation adjustments.
The fourth consequence extends into qualified small business stock held by anyone running or investing in a startup or small company. Stock issued after July 4, 2025 now qualifies for a tiered exclusion, up to full exclusion after five years, rather than the prior all-or-nothing five-year holding requirement.
A founder or early investor structuring an exit can now capture partial tax-free gains starting in year three, changing the calculus on when to sell a stake rather than waiting for a single cliff date.
THE WATCH
Watch the IRS's Revenue Procedure publishing these 2026 figures for the exact bracket thresholds once finalized, since preliminary reporting sometimes rounds differently than the official notice. Estate planning documents drafted before July 2025 are worth a review against the new permanent exemption levels.
Also track whether Congress revisits any OBBBA provisions before they take effect, since tax law adjustments remain possible during the next budget cycle.
A builder now knows the same brokerage sale can land in two different brackets depending on which side of an inflation-adjusted line he sells. That line moves every year, which means the sale date itself has become part of the tax strategy.
Sources
IRS unveils higher capital gains tax brackets for 2026, CNBC: https://www.cnbc.com/2025/10/09/capital-gains-tax-2026-federal.html
Recent developments in estate planning, The Tax Adviser: https://www.thetaxadviser.com/issues/2025/oct/recent-developments-in-estate-planning-3/