Charitable Bunching Strategy: How High-Income Donors Recover the Itemized Deduction

Bunching means shifting several years of planned giving into a single tax year so the total clears the standard deduction by a wide margin, then taking the standard deduction in the quiet years that follow. The 2017 law roughly doubled the standard deduction and put a ceiling on the write-off for state and local taxes, so a household that gives 12,000 dollars every year often sees no federal benefit at all from those gifts. Their itemized column never rises above the standard amount, and the finished return looks the same as a return with no charity on it. A high net worth charitable bunching strategy fixes an arithmetic problem rather than a generosity problem. The same money reaches the same organizations over the same span of years. It simply lands in fewer and larger tax years. Charitable gifts are reported on Schedule A of Form 1040, and a gift produces federal savings only in a year when the itemized column beats the standard column.

Here is the arithmetic on a married couple whose standard deduction is 30,000 dollars, who have 10,000 dollars of deductible state and local tax and no mortgage interest. Giving 12,000 dollars a year puts their itemized total at 22,000 dollars, which loses to the standard deduction in every one of the four years. Now move four years of giving into one. Year one shows 48,000 dollars of gifts plus 10,000 dollars of state and local tax, or 58,000 dollars itemized. Years two through four take the standard 30,000 dollars each. Four-year deductions come to 148,000 dollars under the bunched plan against 120,000 dollars under the level plan, a gap of 28,000 dollars. At a 35 percent marginal rate that gap is worth roughly 9,800 dollars of federal tax. The charities receive 48,000 dollars either way. One wrinkle matters at this income level. The larger cap on state and local taxes enacted in 2025 phases back down as income climbs, so most families running this analysis are still working with a small state and local number rather than a generous one, which makes the charitable side of the itemized column carry even more of the load.

The mistake we see most often is a pledge treated as a gift. A signed commitment to give 100,000 dollars over five years is not deductible on the day it is signed. It becomes deductible as each payment goes out, which means a pledge schedule quietly locks a family into the level giving pattern that produced no benefit in the first place. Two smaller timing points ride along with that one. A mailed check counts as paid on the postmark date when it clears in due course, and a credit card gift counts in the year charged rather than the year the card balance is paid. Households running a high net worth charitable bunching strategy should also line the funding year up against a lumpy income year, because a deduction is worth more against income taxed at the top rate than against a flat middle-bracket year. Publication 17 covers the individual filing rules at Your Federal Income Tax, and our tax strategy group builds the year-by-year model before any money moves. Our individual return team then files what the model assumed.

Rules for itemized deductions have changed twice in the past decade and show every sign of moving again. A family that maps a giving calendar three or four years out keeps its options open, while a family on autopilot finds out in April that a year of real generosity produced nothing on the return. The IRS filing calendar at when to file sets the outside boundary, but every decision that matters here has to happen by December 31. Sketch the next three giving years now and the arithmetic will already be waiting the next time the rules shift.

A donor advised fund is an account held at a sponsoring public charity. The donor makes an irrevocable gift into that account and takes the deduction in the year of the transfer, then recommends grants out to operating charities over the following years. The split between the deduction date and the grant date is the entire reason this vehicle pairs so well with bunching. A family can move four years of giving into the account during one high income year, claim the deduction against that year’s income, and still send the local food bank the same quarterly check it has always received. The Reed Corporation does not sponsor a donor advised fund and does not hold the account. We also do not choose what the balance inside it is invested in. Sponsorship belongs to a third party charity, and investment selection inside the account belongs to the donor working with the donor’s own licensed advisors. Our piece is the tax calendar, which is the part that decides whether the deduction lands in the year where it is worth the most.

Take a founder with 900,000 dollars of income in a company sale year and income closer to 300,000 dollars in ordinary years. She funds the account with 200,000 dollars during the sale year instead of giving 50,000 dollars a year for four years. The deduction now offsets income taxed at the top federal rate rather than income taxed well below it, and her grants still go out at 50,000 dollars a year on the schedule the charities expect. If her marginal rate in the sale year runs 37 percent and her later rate runs 24 percent, the same 200,000 dollars of giving carries roughly 26,000 dollars more federal value in the bunched year. That figure is a model rather than a promise, and the real answer depends on her other deductions and on the percentage limits described further down this page. A large deduction also changes the estimated payment math, so the quarterly schedule in Form 1040-ES gets rebuilt the same week the gift is made.

Two mistakes cost real money here. The first is a settlement problem. Transferring appreciated securities into a sponsored account takes days, and sometimes more than a week around the holidays, so a transfer that settles on January 2 becomes a January deduction no matter when the paperwork was signed. Start December transfers in the first half of the month. The second mistake is treating the account as though it were still family money. It is not. The gift is irrevocable, grants cannot satisfy a personal pledge, and a donor cannot accept anything of value back from a grant, which puts gala seats and auction items out of reach. A grant to an individual person, however deserving that person may be, is not permitted either. One more point surfaces at filing time. The grant a family recommends three years later produces no second deduction. The deduction happened once, at funding. Contribution records follow the ordinary rules the IRS lays out under recordkeeping, and the sponsor’s confirmation letter is the document that supports the number on the return.

The account buys a family room to decide later. A donor who wants a large deduction this year but has not settled on the recipients can fund now and grant next spring without losing anything. Our tax strategy team models the contribution against projected income before the wire goes out, and our bookkeeping group files the confirmation letters where they can still be produced five years later. Publication 505 explains how a deduction of this size feeds back into withholding and quarterly payments at Tax Withholding and Estimated Tax. Families who choose the funding year deliberately tend to keep giving at a steady level through market cycles, because the commitment was made in a year when the cash was clearly there rather than in a thin quarter when it was not.

A gift of publicly traded stock held more than one year is deducted at fair market value on the date of the gift, and the built-in gain is never taxed to anyone. The charity sells the shares without tax. The donor deducts the full value. Nobody ever pays the capital gains bill that had been sitting inside the position. That single result is the largest source of savings inside a well-run high net worth charitable bunching strategy, and it is available on any low basis holding a family has owned long enough. The holding period is the hinge. At one year or less the shares are short term property and the deduction falls to cost basis, which can be a small fraction of what the donor believed was given. Mutual fund shares behave the same way as individual stocks. Shares in a private company or an interest in a partnership also qualify, though they bring an appraisal requirement and often a transfer restriction, so those gifts run on a timeline of months rather than days. Basis rules sit in Publication 551, Basis of Assets, and the wider investment reporting rules sit in Publication 550.

Run the numbers on 100,000 dollars of stock with a 20,000 dollar basis, held six years. Donated directly, the deduction is 100,000 dollars and the 80,000 dollars of gain simply disappears. Sold first, that 80,000 dollars of gain lands on Form 8949 and carries to Schedule D. At a 20 percent long term rate that is 16,000 dollars of tax, and the 3.8 percent net investment income tax computed on Form 8960 adds another 3,040 dollars. The donor is left with 80,960 dollars to give and deducts only what was actually given. Same intent, and roughly 19,000 dollars less ends up in either the charity’s hands or the family’s.

The common mistake is donating the wrong tax lot. Brokerage platforms often default to first-in-first-out or to an average basis method, so a family that means to give the six-year lot can accidentally hand over shares bought last spring and cut its own deduction to basis. The fix is specific lot identification in writing before the transfer settles, backed by a basis record somebody has actually maintained across account transfers and stock splits. The mirror image mistake is donating a position that is underwater. A stock worth 40,000 dollars against a 70,000 dollar basis should be sold rather than given. Selling captures the 30,000 dollar loss on Schedule D, and the cash proceeds can then be donated for the same deduction. Give a loser away and that loss vanishes for everyone.

The Reed Corporation is a CPA and tax firm. We are not a registered investment adviser and we do not manage assets. We do not sell securities or insurance, and we do not recommend investments. What we do is track cost basis across accounts, model the tax result of a proposed gift, and put that model in front of the client’s own advisor before any transfer instruction goes out. Property dispositions in general are covered in Publication 544. Our individual tax return team reports the gift when the year closes, and our planning team works through lot selection alongside the client and the advisor. Portfolios keep growing more concentrated in a handful of long-held winners, so the case for giving shares instead of cash gets a little stronger with every year the market climbs.

Charitable deductions are capped as a share of adjusted gross income, and the cap depends on what was given and who received it. Cash to a public charity or to a sponsored donor advised fund is generally limited to 60 percent of adjusted gross income. Long term appreciated property given to a public charity at fair market value is generally limited to 30 percent. Gifts to a private non-operating foundation are tighter, roughly 30 percent for cash and 20 percent for appreciated property. A donor who would rather not lose the current year deduction can elect to value appreciated property at basis instead of fair market value, which moves the gift into the higher percentage class. That election covers every gift of that type for the year, so it is a decision to make once with a model in front of you, not an item to check on a software screen. Whatever the year’s limit turns out to be, the deduction still only helps if the itemized column beats the standard deduction, which is why the percentage limits and a high net worth charitable bunching strategy have to be planned in the same conversation.

Work an example at 1,000,000 dollars of adjusted gross income. The donor gives appreciated stock worth 400,000 dollars to a public charity. The 30 percent ceiling allows 300,000 dollars this year, and the remaining 100,000 dollars carries forward. Add 100,000 dollars of cash to the same charity and the cash competes for room under the overall ceiling, so a slice of it may also be pushed into next year. Anything disallowed carries forward for up to five tax years and keeps the character it started with, meaning appreciated property carryover stays subject to the 30 percent test in each later year rather than converting into a cash-class deduction. Unused amounts expire at the end of the fifth year. That is a real risk for a donor whose income drops right after a very large gift, because five modest years in a row may not absorb the carryover.

Two changes that take effect for 2026 returns deserve room in the model. An itemizing donor now has to clear a floor equal to one half of one percent of adjusted gross income before charitable gifts count at all, so a 1,000,000 dollar income means the first 5,000 dollars of giving produces nothing. The value of each itemized dollar is also capped for taxpayers in the top bracket, which trims the benefit of a deduction that used to be worth 37 cents on the dollar. Both changes push in the same direction, toward fewer and larger giving years rather than a level annual habit. A separate small deduction for donors who do not itemize also begins in 2026, capped at 1,000 dollars on a single return and 2,000 dollars on a joint return, which softens the picture at lower incomes without changing the math for the households on this page.

The mistake here is a giant gift made in a low income year. A retiree with 120,000 dollars of income who donates 400,000 dollars of stock can deduct only 36,000 dollars in year one and will very likely watch part of the carryover expire unused. Fund the gift in the year the income shows up. Our tax planning team runs the limit calculation against projected adjusted gross income from Form 1040 before the gift date, and our bookkeeping team tracks the carryover schedule so no year gets skipped. Investment income reporting that feeds the limit calculation is described in Publication 550. Model the five year window before the wire leaves, and a large gift will keep working for the full stretch rather than dying quietly in year six.

Substantiation is where good giving turns into a lost deduction. Any single gift of 250 dollars or more needs a contemporaneous written acknowledgment from the charity stating the amount and saying whether the donor received goods or services in return. Contemporaneous has a hard meaning. The letter must be in hand by the earlier of the date the return is filed or its due date including extensions, and a letter obtained afterward does not repair the problem. Gifts under 250 dollars need a bank record or a written communication from the organization. Noncash property over 500 dollars requires Form 8283 with the return, and noncash property over 5,000 dollars generally requires a qualified appraisal with the appraiser and the charity both signing that form. Publicly traded securities are the useful exception and need no appraisal. Publication 526 is the IRS guide that walks through these rules in order, and the general documentation standards appear under recordkeeping.

Quid pro quo giving trips up more donors than any appraisal question. A seat at a benefit dinner priced at 1,000 dollars where the meal and entertainment are valued at 175 dollars produces a deduction of 825 dollars, not 1,000 dollars, and the charity’s letter has to state that value. The second frequent error is the check written from a business operating account. An owner who signs a 20,000 dollar check from an S corporation for a personal cause has created a distribution followed by a personal gift, and the acknowledgment letter often names the company rather than the person who will claim the deduction. That mismatch is exactly what an examiner looks for. A third error is quieter and more expensive. A donor gives an interest in a private business worth 250,000 dollars, skips the qualified appraisal because the value seemed obvious, and loses the entire deduction on a rule that has nothing to do with whether the gift was real.

What our firm does and does not do should be plain. The Reed Corporation is a CPA and tax firm. We are not a registered investment adviser. We do not manage assets and we do not sell securities or insurance. We also do not recommend investments to anyone. Donor advised fund sponsorship belongs to third party charities, and qualified appraisals belong to independent appraisers we can point you toward but never replace. Our work is the tax layer around all of it. That means cost basis tracking across accounts, net investment income tax modeling on Form 8960, charitable timing, quarterly estimated payments, and coordination with the client’s own licensed advisors so the tax result of a decision is known before it is made. If a notice does arrive, the IRS explains what each version means at understanding your IRS notice or letter, and prior-year account data can be pulled through get transcript. No return is beyond an audit, and clean substantiation is what makes an audit short.

Families who want a documented plan rather than a December scramble can Request Private Consultation and walk through a multi-year giving model with a CPA. Our individual tax return group files the year the gift lands, and our bookkeeping group holds the acknowledgment letters and appraisal reports where they can be produced on request years later. A high net worth charitable bunching strategy lives or dies on paperwork nobody enjoys collecting, which is why we collect it as the gifts happen rather than the following March. Charitable rules tightened again for 2026 and the direction of travel is toward more documentation rather than less, so a family that builds the habit now will spend far less time defending a deduction later.