Ask a room of fundraisers why donations spike in December, and a lot will say the same thing: tax deductions. It’s a reasonable answer. It’s also mostly wrong.
In the US, where December 31 is the tax deadline, only around 10% of donors claim the deduction. The other 90% get no tax benefit at all for giving before year-end.
And yet December is still the biggest giving month almost everywhere fundraisers work, including countries where the financial year doesn’t even end in December. If tax savings were the real driver, none of that would make sense.
Here’s what is likely driving it instead.
The Deadline Is Real. It Just Isn’t a Tax One.
December 31 is a deadline (almost) everyone shares. Your nonprofit didn’t invent it. It’s simply the day the Gregorian calendar resets to zero. That’s the same reason New Year’s resolutions are a real cultural habit and “March resolutions” aren’t. The turn of the year creates urgency on its own, no tax code required.
The Reflection Does the Rest
The end of the year is also when people naturally take stock: what mattered this year, what they’re grateful for, who they want to be next year. That reflective mood is exactly the headspace where a donation makes sense.
It’s not a coincidence that “New Year, new me” and year-end giving peak at the same time. Both come from the same instinct: people are working out what they value. A gift to a cause they care about is one of the most direct ways to act on a value instead of just thinking about it.
The Season Does Some of the Work for You
Whatever the holiday, Christmas, Hanukkah, or none at all, the cultural air in December is thick with generosity and gratitude. Donors absorb that just by being alive in the culture that month, whether or not they personally celebrate anything. You don’t have to manufacture a ‘season of giving’ mood. You’re borrowing one that’s already there.
Your Ask Isn’t the Only One They’re Getting
Because most nonprofits mail and email a lot in this exact window, your donor is getting asked by everyone at once. That’s usually framed as a problem: inbox fatigue, mailbox overload.
But it’s also an advantage. Giving right now is what everyone else seems to be doing too. That kind of concentrated social proof makes saying yes feel normal rather than exceptional.
So What Do You Actually Do With This?
None of this replaces good fundraising. It amplifies it. The deadline, the reflection, the season, the social proof, they’re all working in your favor. But none of them can save a weak ask.
A strong year-end ask still needs what any strong ask needs: a specific offer, a real reason to act now, and one beneficiary your donor can picture. Give them that, and you’re not manufacturing urgency. You’re just handing them a reason to do, today, what they already believe in.
So no, it was never really about the deduction. It was about the calendar, the reflection, and the season doing what your ask alone couldn’t.
Knowing why donors give at year-end is only half the job. The other half is knowing what to send and when to send it.
Our free Calendar for Successful Year-End Fundraising maps this all out for you, from September through to the final days of December. You don’t have to figure it all out on your own. Download the guide today.
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2 Comments. Leave new
Can you share where you got the 10% figure? I’m curious.
Hi BW, that figure is from a report published by USA Facts in 2025. Here’s the quote: ‘The portion of tax returns claiming itemized deductions declined from 30.6% in 2017 to 9.5% in 2022’
Given that charitable donations are just one expense that fall into the category of itemized deductions, the number of people claiming them as a deduction is likely even lower but I chose to be conservative!