You give the same amount to charity every year and receive no tax benefit for it. That is not an error — it is the arithmetic of a large standard deduction.
Charitable donations are an itemised deduction. They only reduce your tax if your total itemised deductions exceed the standard deduction. For most households they do not, so the giving is entirely from after-tax money.
What changed in 2026
- The larger standard deduction persisted. The threshold remained high enough that most households do not itemise.
- Additional deductions for older taxpayers raised it further. New age-based deductions increased the bar for retirees — see the senior bonus deduction.
- Donor-advised fund adoption continued growing. Their role in bunching strategies remained central.
- Appreciated securities donation stayed under-used. Despite being clearly advantageous, most giving remained in cash.
The arithmetic
Suppose your other itemised deductions total well below the standard deduction, and you give a moderate amount annually.
Giving annually: each year your itemised total remains below the standard deduction, so you take the standard deduction and the giving produces no benefit at all.
Bunching three years into one: in that year your itemised total exceeds the standard deduction, so you itemise and the excess produces a real deduction. In the other two years you take the standard deduction, having given nothing.
Charities receive the same total. You receive a deduction you would otherwise have lost entirely.
| Approach |
Year 1 |
Year 2 |
Year 3 |
| Annual giving |
Standard deduction |
Standard deduction |
Standard deduction |
| Bunched |
Itemise, benefit |
Standard |
Standard |
The benefit is the excess over the standard deduction in the bunched year, multiplied by your marginal rate. It scales with how far over the threshold you get, which is why bunching more years produces more benefit.
Donor-advised funds solve the timing problem
The practical objection to bunching is that charities need consistent funding, and giving three years at once then nothing disrupts them.
A donor-advised fund separates the two. You contribute a lump sum and take the deduction in that year. The money sits in the fund, invested, and you recommend grants to charities over subsequent years at whatever pace you choose.
Charities receive steady funding; you received the deduction when it was useful. That is the whole mechanism, and it is why these funds became central to bunching — see donor-advised funds.
The contribution is irrevocable — the money is committed to charitable purposes and cannot come back — which is the trade for the immediate deduction.
Donate appreciated securities
The refinement that is frequently worth more than the bunching itself, and is consistently under-used.
Donating appreciated securities held long-term generally allows a deduction for the full market value without recognising the capital gain. Selling and donating the cash would trigger the gain first.
So for the same charitable amount you avoid a tax you would otherwise have paid. Combined with bunching into a donor-advised fund, this is the standard efficient approach: contribute appreciated holdings, take the full-value deduction, avoid the gain, and grant to charities over time.
The holding period matters — short-term holdings are generally deductible only at basis, which removes the advantage.
For those old enough, a qualified charitable distribution from a retirement account is another route, satisfying required distributions without the amount entering income at all. That helps even without itemising, which makes it particularly valuable — see required minimum distributions.
Common mistakes
- Giving annually without checking whether you itemise. No benefit for most.
- Donating cash instead of appreciated securities. Pays a gain unnecessarily.
- Donating short-term holdings. Generally deductible only at basis.
- Bunching without a donor-advised fund. Disrupts charities unnecessarily.
- Forgetting deduction limits. Percentage-of-income caps apply, with carryforward.
- Not checking state treatment. Some states allow deductions the federal system effectively denies.
- Overlooking qualified charitable distributions. Better than itemising for those eligible.
FAQ
How many years should I bunch?
Enough to comfortably exceed the standard deduction, which depends on your other deductions and giving level. Two or three years is common.
Are there limits on the deduction?
Yes — deductions are capped as a percentage of income, with different limits for cash and appreciated property. Excess carries forward, so a very large contribution may deduct over several years.
Is a donor-advised fund the only way?
No — a private foundation is an alternative with more control and considerably more administration and cost. For most people a donor-advised fund is far simpler.
What if I already itemise every year?
Then you are already getting the benefit and bunching adds little. Donating appreciated securities rather than cash still helps.
Where to go next
For the vehicle that makes bunching practical, read donor-advised funds. For the deduction threshold that created the problem, the senior bonus deduction, and for the retirement account route, required minimum distributions.
This is general information, not tax advice. Deduction limits and carryforward rules apply; consult a qualified preparer.