Charitable giving + tax deductions

Three patterns on your tax return that reveal what your charitable giving is costing you

You just filed your taxes. You know your charitable deduction. You know your capital gains. What you may not know is how those two numbers relate to each other – and what the gap between them is costing you every year.

Most donors who give $10,000 to $75,000 a year to charity are generous. They’re also, in many cases, giving inefficiently – paying thousands of dollars in taxes they don’t need to pay, simply because of the form and timing of their contributions. The money doesn’t go to the IRS because they’re doing something wrong. It goes because they’re doing something common: donating cash while holding appreciated stock.

This article isn’t about a specific financial product. It’s a diagnostic: three patterns you can look for on your own tax return that tell you whether your giving is costing you more than it should. Each one comes with a specific dollar estimate and a question you can bring to your CPA.

What to have in front of you

To run this diagnostic, you’ll want three things:

Your most recent federal tax return. Specifically, Schedule A (Itemized Deductions) and Schedule D (Capital Gains and Losses). Schedule A shows what you deducted for charitable contributions. Schedule D shows whether you realized capital gains from selling stock or other assets.

Your year-end brokerage statement. This shows your current holdings, including any unrealized gains – stock you own that has appreciated but you haven’t sold. Your tax return won’t show unrealized gains. Your brokerage statement will.

Your donation receipts. These show when you made your charitable contributions during the year. The timing matters, and it’s usually not visible on Schedule A alone.

Pattern 1: You donated cash while selling appreciated stock

This is the most common pattern – and the most expensive one.

Look at your Schedule D. Did you sell stock or mutual fund shares at a gain during the year? Now look at Schedule A. Did you report charitable contributions in cash? If both answers are yes, you likely paid capital gains tax on stock sales that could have been contributed directly to charity instead – generating the same deduction while avoiding the tax entirely.

Here’s what that costs. Say you donated $62,000 in cash to six organizations. In the same year, you sold $62,000 of company stock – shares with a cost basis of $18,000 – to rebalance your portfolio. That sale triggered approximately $44,000 in capital gains. At a combined federal rate of 18.8% (15% long-term capital gains plus 3.8% Net Investment Income Tax; see IRS Topic No. 409 and IRS Topic No. 559) and a state rate of 4.95% for Illinois, that’s roughly $10,450 in taxes on the gain.

If you’d contributed the stock directly to a qualified charity or a donor-advised fund, there’s no sale. No capital gains tax. No Net Investment Income Tax. The charity receives the same value. You receive the same deduction at fair market value (see IRS Publication 526). The only difference: $10,450 stays in your pocket instead of going to the IRS.

Question to bring to your CPA: “Last year I donated cash and sold appreciated stock separately. If I’d contributed the stock directly instead, how much would I have saved in capital gains taxes?”

Article 4 in this series walks through the full math of stock-versus-cash charitable contributions – including how the deduction works at fair market value and the specific rate breakdowns for different income levels.

Pattern 2: You donated cash while holding appreciated stock

This pattern is subtler than Pattern 1, because the evidence isn’t all on your tax return. It’s split between your return and your brokerage statement.

Look at Schedule A. Are your charitable contributions all in cash? Now look at your brokerage statement. Do you hold stock – company shares, index funds, individual positions – with significant unrealized gains? If so, you’re using after-tax dollars for charity when you have pre-tax appreciated shares available.

You didn’t sell stock and pay capital gains tax this year – so there’s no tax on a realized gain. The cost here is opportunity cost. Every dollar of cash you donate is a dollar you earned, paid income tax on, and then gave away. If you’d contributed appreciated stock instead, you’d generate the same deduction – and those shares would never be taxed. The gain disappears permanently.

The hypothetical math is the same as Pattern 1. On a $62,000 contribution of stock with $44,000 in embedded gains, contributing shares instead of cash avoids approximately $10,450 in future capital gains taxes – taxes you’ll eventually owe when you sell those shares to rebalance, fund a purchase, or take a distribution.

The difference between Pattern 1 and Pattern 2 is timing: in Pattern 1, you already paid the tax. In Pattern 2, the tax is coming. Either way, the appreciated stock is the more efficient contribution vehicle.

Question to bring to your CPA: “I’m holding stock with significant unrealized gains and donating cash to charity. Should I be contributing the shares directly instead – and what’s the tax impact over the next two to three years?”

If your appreciated stock is employer stock from RSU grants or equity compensation, Article 9 in this series covers the specific mechanics of contributing company stock to a donor-advised fund.

Pattern 3: You made all your contributions in December

This one doesn’t show up neatly on your return. Pull out your donation receipts and check the dates. If most or all of your contributions landed in November or December, you’re leaving three benefits on the table.

No growth runway. When you contribute assets to a donor-advised fund in spring, those assets have eight to nine months of tax-free growth before year-end. That growth increases the total value available for future grants. A hypothetical $62,000 contribution in April at 6% annualized grows to approximately $64,500 by December 31. The same contribution in December? It has a few weeks at most. The difference is roughly $2,300 in additional grant capacity – just from timing.

Year-end deadline risk. Stock transfers via DTC settlement take three to five business days under normal conditions. In December, broker processing queues can lengthen. A transfer initiated in the last week of the year can miss the December 31 cutoff, pushing the deduction into the following tax year. Spring contributions carry zero deadline anxiety.

No estimated tax payment benefit. If you make quarterly estimated tax payments, a spring contribution reduces your projected AGI in time to lower your Q2, Q3, and Q4 estimated payments. That’s an immediate cash flow benefit. A December contribution can’t reduce estimated payments that have already been made. Article 6 in this series covers why Q2 is often the smarter window for a DAF contribution.

Question to bring to your CPA: “If I moved my charitable contribution from December to April or May, how would that affect my estimated tax payments and the growth available for future grants?”

What these patterns add up to

Most donors who give at the $45,000 to $75,000 level fit at least one of these patterns. Many fit two or all three: they donate cash, they hold appreciated stock, and they give primarily in December. The combined cost isn’t just $10,450 in one year. Over a two-year period, the stock-versus-cash switch alone produces approximately $21,000 in avoided capital gains taxes – on the same giving, to the same charities, on the same schedule. Add the timing benefits and the growth runway, and the annual improvement can exceed $12,000.

None of this requires changing who you give to, how much you give, or why you give. It changes the form of the contribution and the timing.

A note on 2026 tax rules

New federal rules under the One Big Beautiful Bill Act (Public Law 119-21) make strategic charitable planning more important this year. The first 0.5% of AGI in charitable contributions is no longer deductible. For a household with $450,000 in AGI, that floor is $2,250 – meaning the deductible portion of a $62,000 contribution is $59,750. A 35% cap on deduction value applies to taxpayers in the top bracket (37%), though households at the 35% marginal rate aren’t directly affected. The standard deduction for married filing jointly is $32,200.

These changes don’t reduce the benefit of contributing appreciated stock. The capital gains avoidance – which is the primary tax lever for high-income donors – is entirely independent of the deduction rules. Contributing stock instead of cash still avoids approximately $10,450 in capital gains taxes on a $62,000 contribution with $44,000 of embedded gain, regardless of the 0.5% AGI floor.

What to do next

Download the Charitable Tax Return Audit Checklist and review it alongside your most recent tax return. It walks through each of the three patterns with space to fill in your own numbers. Bring it to your next meeting with your CPA.

Complete the Charitable Giving Pattern Assessment – a 2-minute diagnostic that identifies which patterns apply to your situation and estimates your annual tax improvement range.

Not sure how to start the conversation? Download the CPA Conversation Starters – ready-to-use questions for your next meeting with your CPA or financial advisor.

If you want to understand the full math behind Pattern 1 and Pattern 2, Article 4 in this series walks through the stock-versus-cash comparison step by step. If you want to explore the timing argument behind Pattern 3, Article 6 covers why spring is often the better window.

This article is for educational purposes only and does not constitute tax, legal, or financial advice. Consult your CPA or financial advisor before making charitable contribution decisions.

Sources

IRS Publication 526, Charitable Contributions. https://www.irs.gov/forms-pubs/about-publication-526

One Big Beautiful Bill Act (Public Law 119-21). https://www.irs.gov/newsroom/one-big-beautiful-bill-provisions

IRS Topic No. 409, Capital Gains and Losses. https://www.irs.gov/taxtopics/tc409

IRS Topic No. 559, Net Investment Income Tax. https://www.irs.gov/taxtopics/tc559

IRS Topic No. 506, Charitable Contributions. https://www.irs.gov/taxtopics/tc506

IRS Publication 561, Determining the Value of Donated Property. https://www.irs.gov/forms-pubs/about-publication-561

Internal Revenue Code Section 4966, Donor Advised Funds. https://www.law.cornell.edu/uscode/text/26/4966