Your donor retention rate is the number that explains a flat year.

The results slide is up. Last year beside this year, and the two totals are close enough that nobody has to say anything uncomfortable.

$847,000 against $839,000. Up one percent. The treasurer nods. Somebody says that's a decent result in this economy, and the room agrees, because it is, and because the next item on the agenda is the roof.

Nobody asks how many of last year's donors are inside this year's number.

The ED knows most of those people. She shook hands at the fall event. She wrote thank-you cards in November with a glass of wine beside her and a stack of envelopes she didn't finish. Sitting in that meeting, she could not tell you which of them came back and which of them quietly didn't. The database could tell her in about twenty minutes. She has never had the twenty minutes.

So the year passes as a tie. Two nearly identical totals, and underneath them a churn nobody has measured and nobody has priced.

The number itself

Your donor retention rate is one thing: of the people who gave to you last year, what percentage gave again this year.

That's the whole definition. No adjustment for gift size, no weighting, no formula worth arguing about at a committee table. Count the donors who gave in the prior year. Count how many of those same names gave again in the current year. Divide the second by the first.

Everything else here is what that one percentage does to you over time.

What the benchmarks actually say

The Association of Fundraising Professionals runs the Fundraising Effectiveness Project, which pools real transaction data from thousands of organizations and reports on it every quarter. It's the closest thing this field has to a shared scoreboard. Two caveats before you use it: these are sector-wide averages, and the panel is largely American. Treat them as the shape of the problem, not as your report card.

For full-year 2025, overall donor retention across the FEP panel sat at 43.3 percent — a fraction above the 43.1 percent of the year before.

Read that again slowly. The average organization loses well over half its donors every year, then buys them back at full price and calls the result stable.

The front door is worse. Of the people who make a first gift, only about one in five gives again the following year. Donors who've already given more than once behave completely differently — repeat retention runs close to 70 percent, and in some quarters considerably higher.

So the loyalty curve is savagely front-loaded, and the first renewal is where the whole thing is decided. Almost everything you're going to lose, you lose in the twelve months after a stranger first says yes.

One more figure from the same 2025 data, because it explains a lot of flat years: donor counts across the panel fell an estimated 3.6 percent, while total dollars raised went up. The money grew. The number of humans shrank. Growth is coming from fewer, larger gifts, which is a fine year and a fragile decade.

The math that changes behaviour

Say your file is a thousand donors. At the sector average, you keep 430 of them. Which means that to open next year exactly where you opened this one, someone on your team has to go find 570 strangers, warm them up, and convert them. And of those 570 first-time gifts, roughly 114 will still be with you the year after that.

That's the trap the flat total is hiding. Acquisition running flat out, at full cost, to stand still.

Now run it forward without any acquisition at all, just to see the shape. A thousand donors at 43 percent retention becomes 430, then 185, then about 80 by the end of year three. The same thousand at 53 percent becomes 530, then 281, then 149. Ten points of retention nearly doubles what's left of your file in three years. Even five points leaves you around 110 donors instead of 80, which is a third more organization for the same mailing list.

Retention compounds, quietly and in both directions, on every donor you have.

Then there's what it costs. Take last year's acquisition spend — the mail drop, the ads, the event, the hours your team actually put in — and divide it by the number of first-time donors it produced. That's your real cost per new donor, and it's usually a number that makes people go quiet.

Now try to do the same thing for retention. Divide what you spent on keeping donors by the number who came back.

Most organizations can't produce that second number, because keeping donors isn't a line in the budget. The phone calls, the printed notes, the March impact story to the summer-camp donor — that work is done in the cracks by whoever cares most, and it's the first thing to go in a hard quarter. That's scarcity math again. The cheapest revenue you have access to is the least funded thing you do.

How to work out yours this week

You need one export and about half an hour. Any CRM will do this, and a spreadsheet will do it if your CRM won't.

Export every gift from your last completed fiscal year with the donor ID or the donor name attached. Export the same thing for the year before. You want gifts from individuals only, so pull out the grants, the corporate sponsorships and the government money — those follow different rules and they'll distort the number badly.

Reduce each list to unique donors. One row per person, no matter how many gifts they made. Now you have two lists of names: everyone who gave in the prior year, and everyone who gave in the most recent year.

Count how many names appear on both. Divide that by the total number of names on the prior-year list, and multiply by a hundred. That's your donor retention rate.

Then do it once more with a smaller slice. Take only the people whose first-ever gift landed in the prior year, and check how many of them came back. That's your first-time donor retention, and it's the number that will tell you the most about what happens next year.

Write both down. Two numbers, a date beside them, and the note that you'll run the same query twelve months from now.

Put it in the plan, and put it in the budget

A retention rate belongs in your fundraising plan as a target with a name against it, sitting beside your revenue goal rather than underneath it. The free Doable Fundraising Plan template has a metrics section built for exactly this — retention and the share of your revenue that's unrestricted are the two vital signs it asks you to watch all year, regardless of which approaches you choose.

Give the target a floor. Something like: hold overall retention above 45 percent, and move first-time retention five points from wherever it sits today. Then fund the work that delivers it — the call inside the first week, the story in March about the specific kid your specific summer-camp donor sent to camp. That's the quiet, unglamorous business of donors leaving because of the silence. That piece is the why. This one is the arithmetic.

Five points sounds like nothing when you say it out loud in a board meeting. On a file of a thousand donors it's fifty people you don't have to go out and replace, and every one of them already knows your name and already said yes once.

Back to the results slide

The good news in all of this is genuinely good, and it's this: retention is the cheapest fundraising you will ever do, and it's the only line in your plan where the prospects are already on your list.

You don't need a new database or a campaign to start. You need the twenty minutes she never had, and then you need to say the number out loud in a room where nobody has ever heard it.

That's a strange meeting the first time. The one percent increase stops being a tie and starts being a question — where did those people go, and who noticed. Some boards get defensive. Most get curious, because it's the first honest handle they've been offered on a number that's been drifting for years. If you'd rather see the whole picture before that conversation, the free organizational diagnostic maps where your gaps actually are in fifteen minutes, and fundraising plans and audits is where we sit down and build the plan around them.

Pull the export. Count the names on both lists. Then bring the number to the next board meeting before somebody puts up another slide.