The 2026 Deduction Cap and Your Big Vesting Year: Give Now or Wait?

Starting in 2026, a top-bracket itemized deduction is worth about 35 cents on the dollar, not 37, and the first 0.5% of your adjusted gross income in charitable gifts no longer counts. In a big vesting year, that changes whether you give or pay deductible state tax in 2026 or wait until 2027.

Been working through this with a couple of people who have a large restricted stock vest landing in 2026. The question is always the same. Pull deductible gifts and state tax payments into this year, or hold them.

There are two separate things changing at once, and they pull in the same direction. One is a new cap on what a top-bracket deduction is worth. Two is a new floor underneath charitable gifts.

The 35-cent cap on a top-bracket deduction

Through 2025, a dollar of itemized deduction in the 37% bracket saved you 37 cents. Starting in 2026, the One Big Beautiful Bill Act reduces that benefit by 2/37 of the lesser of your total itemized deductions or your taxable income above the 37% threshold, so a top-bracket deduction is worth closer to 35 cents on the dollar (Tax Foundation, 2025).

The 37% bracket starts at $640,601 of taxable income for a single filer and $768,701 for a married couple filing jointly in 2026 (IRS, Revenue Procedure 2025-32). The IRS writes that “section 4 of this revenue procedure applies to taxable years beginning in 2026,” so this is a 2026 event, not a 2025 one.

Keep in mind the cap is small per dollar. But in a year where a vest pushes a big chunk of income into the 37% bracket, you are stacking a lot of deductible dollars against it, and two cents on each of them adds up.

The new 0.5% floor under charitable gifts

Second change. Starting in 2026, charitable contributions only count as an itemized deduction above 0.5% of your adjusted gross income (Tax Foundation, 2025). Gifts below that line are not deductible at all.

On a big AGI year, 0.5% is a real number. Half a percent of a $1.5 million AGI is $7,500 of giving that does nothing for your return before the deduction even starts.

This is where timing stops being abstract. If you give the same amount every year, the floor nicks a slice off every year. If you bunch several years of giving into one year, you clear the floor once instead of repeatedly. A donor-advised fund is the common way people do that, funding several years of planned giving in a single year and granting it out to charities over time. Confirm the mechanics with your CPA before you fund one.

2026 or 2027: the actual choice

Here is the fork for someone with the income spike in 2026.

Give or pay in 2026, and the deduction lands against your highest-income year, where it offsets income that would otherwise get hit hard in taxes. But it is worth about 35 cents per dollar under the new cap, and the first 0.5% of AGI in gifts is lost.

Defer to 2027, and if your income drops back to a normal level, the deduction may fall in a lower bracket and be worth less per dollar, and you give up the chance to offset the spike. But a normal-income 2027 carries a lower 0.5% floor, so less of your giving disappears underneath it.

Which side wins depends on how far your 2027 income falls and how much you plan to give. That is a CPA conversation with your real numbers, not a rule of thumb.

Source: Tax Foundation, “Changes to Charitable Giving Under the One Big Beautiful Bill Act” (2025); IRS Revenue Procedure 2025-32 (2026 bracket thresholds).

Factor	Give or pay in 2026 (spike year)	Defer to 2027 (normal year)
Deduction value in 37% bracket	About 35 cents per dollar under the 2/37 cap	About 35 cents only if still in the 37% bracket, less per dollar if income falls to a lower bracket
Charitable floor (0.5% of AGI)	0.5% of a high AGI is lost first	0.5% of a lower AGI is lost first
Offsets the vesting income?	Yes, lands on the spike	No, the spike is already taxed
State tax payment timing	Deductible against the spike year (confirm the SALT limit with your CPA)	Deductible in 2027

Donating company stock instead of cash

One more piece, and it fits this reader especially. If your vest left you holding a concentrated position in company stock that has gone up, donating the shares instead of cash does two things at once. You skip the capital gains tax you would owe on selling, and you trim a position that is probably already too large a share of your net worth.

The gift still has to clear the same 0.5% floor, so the bunching logic still applies. I walked through how those two rules interact in a separate piece on donating appreciated company stock and the new charitable floor.

All of this sits inside the larger question of how a high earner sequences one big income year, which is what the San Diego HENRY strategy walks through.

A few questions that come up

Does the 0.5% floor apply if I take the standard deduction?

No, the floor is for people who itemize. Separately, starting in 2026 a filer who takes the standard deduction can deduct up to $1,000, or $2,000 for a married couple filing jointly, of cash charitable gifts, and that one is permanent (Tax Foundation, 2025). Confirm which side of the line you land on with your CPA.

Is the 35-cent cap worth reshuffling my whole plan over?

On its own, probably not. It is two cents per dollar. The reason it matters in a vesting year is volume. You are putting a lot of deductible dollars against one high-income year, and the floor and the cap both bite harder when the dollars are large. Evaluate it with your actual vest numbers.

Should I just pay my state taxes early in 2026 to lock in the deduction?

Maybe, maybe not. State tax payments are deductible, but the SALT limit and the alternative minimum tax can change what an early payment actually buys you. That is a specific calculation for your return, so confirm it with your CPA before you send money early.

What is a donor-advised fund doing in this?

It lets you fund several years of giving in one year and grant the money to charities over time. In a spike year that clears the 0.5% floor once and puts a large deduction against your highest-income year. Keep in mind the contribution is irreversible once made, so confirm the amount before you fund it.

If you have a big 2026 coming

If 2026 is the year a vest or a bonus lands, the timing of these gifts and payments is worth running before December, not after. The San Diego HENRY strategy covers how the pieces fit together for a high earner in one spike year.

Not sure your situation is big enough to bother with, or worried about an asset minimum. Don’t let that stop you from reaching out. Happy to look at it. We can talk through the timing in a complimentary review, and any fee is something we would go over there.

Hope that helps. What does your 2026 look like?