Deduction Bunching: How to Itemize Every Other Year and Win

By Tom, CPA · Updated October 27, 2026

Part of: Tax Planning

TL;DR: If your itemized deductions hover near the standard deduction, bunching concentrates two or more years of charitable gifts and other flexible deductions into one year. You itemize big that year and take the standard deduction in the others, deducting more in total.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

With the 2026 standard deduction at $32,200 for married couples, many generous, mortgage-holding households find themselves itemizing only a few thousand dollars above the standard deduction, or just below it. In both cases most of their charity is effectively not deductible, because it is filling the gap the standard deduction would have covered anyway.

Bunching fixes that. Instead of spreading gifts evenly, you group them into fewer years. This guide explains how bunching works, what can be bunched, how to pair it with a donor-advised fund, works the math under the new 2026 charitable rules and gives a timing calendar. Background: itemize vs standard deduction and the tax planning guide.

CPA Warning Label: Bunching is the tax version of doing all your laundry on Sunday. Same amount of laundry, far less wasted effort.

How bunching works

Each year, you get the larger of your standard deduction or your itemized deductions. If your itemized total is $28,000 and your standard deduction is $32,200, your $28,000 of real expenses produces the same deduction as $0 of expenses. Every dollar of charity below the gap saves nothing.

Bunching moves flexible deductions so that one year has a big itemized total and the next has very little. In the big year, you itemize well above the standard deduction. In the small year, you take the full standard deduction. Over two years, total deductions rise even though total spending is the same.

The 2026 rule changes

• 0.5% of AGI floor: starting in 2026, itemizers can deduct charitable contributions only to the extent they exceed 0.5% of AGI (contribution base). Bunching means paying that floor fewer times.
• Non-itemizer deduction: in standard deduction years, you can also deduct cash gifts to qualifying charities of up to $1,000 single or $2,000 joint. Gifts to donor-advised funds and supporting organizations do not qualify.
• 35% cap: taxpayers in the 37% bracket get a reduced benefit for itemized deductions, so bunching saves them slightly less per dollar.
• Bigger SALT cap: the $40,400 SALT cap for 2026 makes more high-tax-state households natural itemizers, which can make bunching unnecessary for them.

What can be bunched

Charity is the most flexible because you choose the amount and timing. If your charities depend on steady support, a DAF lets you deduct in one year and still grant to them evenly over several years.

What cannot be bunched

Deductions that do not depend on itemizing, such as traditional IRA and HSA contributions, are not part of the bunching math. They reduce AGI whether you itemize or not. Rental expenses on Schedule E are also outside it.

DAF pairing

A donor-advised fund is an account at a sponsoring charity. You contribute cash or appreciated securities, take the deduction in the year of the contribution, and recommend grants to other charities later. For bunching, that means you can deduct three years of giving in December 2026 while your favorite charities still receive gifts every year.

Why DAFs fit bunching

• Deduction now, giving later.
• You can contribute appreciated stock, deduct its fair market value (generally up to 30% of AGI for long-term holdings to a public charity like a DAF sponsor) and avoid capital gains tax on the appreciation.
• One receipt for the whole year's deduction.

Things to watch

• DAF gifts are irrevocable. Once you contribute, the money must go to charity.
• DAF contributions do not count for the 2026 non-itemizer deduction, so in standard deduction years, give small cash gifts directly to charities if you want that deduction.
• Grants from a DAF cannot pay for event tickets, benefit dinners or pledges you personally made in a way that gives you a benefit.

Older donors may prefer qualified charitable distributions from IRAs, which cannot go to DAFs but reduce income directly.

Math example

Illustration: give $10,000 a year or $20,000 every other year

Hayden and Lou are married with $200,000 of AGI. Each year they have $9,000 of mortgage interest and $10,000 of state and property tax, and they give $10,000 to charity. They are in the 22% bracket.

Without bunching (each year):

• Charity deductible: $10,000 minus the 0.5% floor ($1,000) = $9,000.
• Itemized total: $9,000 + $10,000 + $9,000 = $28,000.
• The standard deduction of $32,200 is higher, so they take it each year. They can add up to $2,000 for direct cash gifts under the non-itemizer rule, for $34,200 per year.
• Two-year total: $68,400.

With bunching:

• Year 1: they put $20,000 into a DAF. Charity deductible: $20,000 minus $1,000 = $19,000. Itemized total: $9,000 + $10,000 + $19,000 = $38,000.
• Year 2: they give $0 to the DAF but give $2,000 in cash directly to charities (part of their usual giving, granted out of their own pocket instead). Standard deduction $32,200 plus $2,000 = $34,200.
• Two-year total: $72,200.

Extra deductions: $3,800, worth about $836 at 22%. If they give $30,000 every third year instead, the gain grows. With appreciated stock instead of cash, they also skip capital gains tax on the shares.

Illustration only. Their year-2 direct cash gifts would be in addition to DAF grants; adjust to your actual giving.

Bunching for retirees and early retirees

Bunching interacts with other plans in the years around retirement.

• The last high-income working year is often the best bunching year. Your marginal rate is highest, so a big DAF contribution in the final year of work saves more per dollar than the same gifts spread over low-income retirement years.
• Roth conversion years may raise AGI, which raises the 0.5% floor a little and can increase the value of the deduction if conversions push you into a higher bracket. Pairing a large charitable gift with a large conversion is a classic way to convert at a lower net cost.
• ACA years are different. Itemized deductions do not reduce the modified AGI used for marketplace premium credits, so bunching does not help with the ACA cliff. Pre-tax contributions do.
• After 70½, a QCD directly from an IRA lowers AGI itself and avoids the itemizing question altogether, so it usually beats bunching for IRA owners who give.

Keep a simple multi-year schedule of planned giving so the "off" years do not quietly turn into years with no giving at all.

One more practical point: bunching works best when it is boring and automatic. Pick a cycle, such as every other year or every third year, put the bunching year on your calendar for October, and decide the amount from your projection rather than from a December mood.

Timing calendar

When bunching does not help

• Your itemized deductions are far above the standard deduction every year anyway.
• Your giving is small enough that even three years bunched will not clear the standard deduction.
• You are 70½ or older and can use QCDs instead.

Watch for interactions with IRA deduction phaseouts and the standard deduction in early retirement, where Roth conversions may claim the standard deduction room. Rental owners should note that Schedule E costs are not part of this; see rental insurance deductions.