We remember and worry about jobs-to-be-done or activities that we haven’t finished, and these continue to bug us until completed.
Our brains observe a useful evolutionary social rule that when someone helps us we generally feel emotionally obliged to return the favour.
You’re familiar with the embarrassment of receiving an Xmas card or gift and not having one to return. This is the need to reciprocate. When engaging supporters consider offering a gift in advance. This could be as simple as useful advice, a copy of a case for support, or an invite to a special event.
In M Shed Museum in Bristol UK, anyone who bought a cake and coffee in the café was offered a card guranteeing a free gift in the museum shop. The gift was small —a pencil or badge — but it led to increased traffic to the shop and to a 15% increase in shop purchases overall.
And not a ‘prize’ or a ‘purchase’. Gifts prime philanthropy more than transactions, which make us think about the direct ‘value’ exchange. Bluecoat Gallery Liverpool moved the free gallery guide (normally on the reception desk) to the top of the donation box. As visitors picked up their free guide they noticed the donation opportunity and felt the pull of reciprocity.
At a supermarket in UK, Trussell Trust volunteers wearing tabards helped shoppers to find parking spaces on arrival. Result? Increased foodbank donations by grateful shoppers who had been helped to park and were keen to reciprocate.
People are less responsive to online reciprocation. It works better face-to-face where it’s clear who helped and that the help was personal. Beware of ‘reciprocation decay’ as over time people forget the gift and how it made them feel. Make the connection fast.
Reciprocity is a powerful principle in behavioural science. At its core it’s the human tendency to want to give something back when we’ve received something, even if it’s small, unasked for or symbolic.
It’s a deeply ingrained social norm found across cultures and contexts. Think of it as the internal nudge that says, “They did something for me, now I kind of want to return the favour.”
Because it helps create emotional connection and moral obligation without pressure. It’s a soft influence that can gently increase giving, loyalty and engagement.
Reciprocity has been used for years. You might in the 70s, 80s or 90s have received a letter from a charity with a free pen or some personal address labels included. Even though you didn’t ask for them, your brain registers a tiny debt, and many people feel more inclined to give as a result.
If you give first with a story or a small gift, people are more likely to give. Even handing over a copy of your Case for Support — if nicely presented — can work. People want to reciprocate with a donation.
Giving something of value (e.g. useful info, an event invitation or personalised thank-you) signals good intentions, which builds rapport and makes future asks more effective.
A heartfelt thank-you, a personalised note or a thoughtful gesture makes donors feel like valued humans, not ATMs. That feeling invites reciprocation, often through renewed giving.
In cultures of philanthropy giving is often framed as a relationship, not a transaction. Reciprocity supports that model by encouraging mutual value over time.
Reciprocity works best when the gesture feels genuine, not manipulative. If it’s obviously a gimmick or tied to a conditional ask (“We gave you this, so you must give back”), it can backfire and even trigger Reactance (Card 58).
When the =mc consulting team carried out a project with M Shed Museum in Bristol, they created relationship between the café at one end of the museum and the shop at the other end.
Visitors to the café who bought a cake and a coffee, or even just a coffee or tea were given a small card saying they were entitled to a free gift if they visited the shop. The gift was a very small trinket.
However, there was a significant uptake from people keen to find out what the free gift might be. And not only that, once people were in the shop they felt a psychological pull up to buy something and sales went up by 21%.
The small free gift had had two effects:
Imagine you’re finishing a nice meal at a restaurant. The server drops off the bill and with it, a couple of mints. You smile, say thanks, and tip a bit more generously than you might have.
Now, imagine this happens instead:
This real-life study, often cited by behavioural scientist Robert Cialdini, reveals something powerful:
How we give matters just as much as what we give.
Just like the waiter, we’re often asking people to be generous and small, thoughtful actions can shift the emotional context of the ask.
Here’s how to bring that mint-magic into your donor journey:
A small gift, unexpected thank-you or helpful resource can act as a psychological “mint”, priming supporters to give back.
That pause, return, and “just for you” moment? It triggers reciprocity, surprise and gratitude. Try weaving that feeling into your communications, such as a voice note, a handwritten card a call just to say thanks.
The power of the mint wasn’t in the sugar, it was in the sincerity and timing. In fundraising authenticity always wins. A gimmick won’t cut it.
