Do Client Gifts Actually Work? What the Research Says, and What It Doesn't

We sell a $35 logo mug gift box, printed, packed and shipped to each person's address, so we have a stake in this answer. This page grades each study by the strength of its evidence, names who ran each survey, and says what the research doesn't show.

Key facts

• +17% and +75%: how much more often people donated when a charity letter held a small or a large gift, in a randomized mailing of about 10,000 letters (Falk, 2007, Econometrica).
• 17.8% vs 15.1%: the mean tip when a server gave each diner a piece of chocolate with the check, against none, across 92 dining parties (Strohmetz et al., 2002, Experiment 1).
• 46% of gift recipients in an online poll of 1,547 professionals said year-end gifts from vendors made them "more likely to continue working together", and companies with fewer than 100 employees were "the most likely to be influenced" (business.com, an online poll, October 2022).
• Price isn't the lever: givers expect pricier gifts to be appreciated more; recipients report no link between price and appreciation (Flynn & Adams, 2009).

The Evidence Ladder: What Each Kind of Study Can Prove

A randomized experiment can show that a gift caused a change. A survey shows what people say. Here is every study on this page, the strongest kind of evidence first.

What the Field Experiments Found

Charity letters: a gift raised giving, and a bigger gift raised it more. Armin Falk's team sent roughly 10,000 solicitation letters for a charity. One third held no gift, one third a small gift, one third a large gift, and "Treatment assignment was random." Compared with no gift, "the relative frequency of donations increased by 17 percent if a small gift was included and by 75 percent for a large gift" (Falk, 2007). This is the cleanest evidence that an unasked-for gift changes behavior. It is also a reminder that, in this study, the larger gift did more.

Restaurant candy: the way it's given matters. In Experiment 1, across 92 dining parties, the mean tip was 17.8% when each diner got a piece of chocolate with the check and 15.1% with none. The servers used "a fancy, foil wrapped piece of chocolate", chosen "to differentiate this token gift from the inexpensive wrapped mints that are often provided by restaurants." Experiment 2 (80 parties, 20 per condition) varied the candy and the delivery:

The same two pieces did best when the second came as an extra, unexpected gesture. The authors argue "that reciprocity is a stronger explanation for these findings than either impression management or the good mood effect" (Strohmetz et al., 2002). Their conclusion on practical value: "Inexpensive and personalized gestures of gratitude such as giving one's customers candy at the end of a meal could mean millions of dollars of extra income annually for the nearly two million servers in the U.S."

Airline customers: gifts moved spending through the relationship. Marchand and colleagues combined "a longitudinal field experiment with internal customer database information" for 1,950 airline customers and tested four gift designs. They found "the impact of gifts on customer spending is fully mediated by customer perceptions of perceived relationship investment and repurchase intention" (Journal of Service Research).

Business customers: a controlled test, then a replication with sales. Richard Beltramini's 1992 study is titled "A Controlled Field Experiment". His 2000 replication surveyed a company's customers before and after "being sent a more expensive gift, a less expensive gift, or no gift at all", tracked their actual sales, and concluded that "business gift-giving represents an effective part of a marketer's overall marketing communications strategy" (Journal of Advertising). The abstract gives no effect sizes, so we quote none.

Why Gifts Work: Reciprocity and Gratitude

Reciprocity. People feel a pull to return a favor. The restaurant study's authors chose it over two rival explanations, wanting to look generous and simply being in a good mood.

Gratitude. Palmatier and colleagues found, in a lab experiment and a two-sided field survey, that "relationship marketing investments generate short-term feelings of gratitude that drive long-lasting performance benefits" (Journal of Marketing). A client gift is one kind of relationship investment.

Both can backfire if the gift looks like a lever. In a study of 143 purchasing executives, "the buyers' perceptions of the level of manipulation associated with the gift" affected whether they intended to reciprocate (Wafa, Jantan & Chow, 1999). A thank-you with no ask attached avoids that.

What Client-Gift Surveys Say, and Who Ran Them

These client-gift numbers are surveys: what recipients say. Three of the four come from companies that sell gifts or gifting software.

How to read this table. Every figure is self-reported, and none of these surveys measured whether a gift changed what anyone bought. The business.com poll is the only one not run by a gift seller, and it is also the most mixed: the poll in which 46% said vendor gifts made them "more likely to continue working together" also found 54% had thrown a gift away unused.

What the Research Doesn't Show

• That client gifts raise a small firm's revenue. We found no published randomized study of it. The closest designs are an airline's 1,950 customers and Beltramini's single company, whose effect sizes aren't in the abstracts.
• That smaller is always better. Falk's large gift outperformed the small one on donations. Flynn and Adams found recipients' appreciation wasn't linked to price. Both are true: they measured different things, giving money back versus feeling thanked.
• That a tip, a donation and a client relationship work the same way. The strongest experiments are in restaurants and charities. The mechanism, reciprocity, is the same; the size of the effect on a client relationship is unknown.
• That recipients do what they say. "More likely to continue working together" is an answer to a poll, not a renewal.

What the Evidence Suggests for a Client Gift (Our Reading)

Not a finding, our reading of the studies above:

• Unexpected beats expected. The extra candy offered on the way out did best in the restaurant study.
• Personal beats expensive. Recipients' appreciation wasn't linked to price (Flynn & Adams, 2009), and a specific thank-you lands better than writers expect (Kumar & Epley, 2018).
• Useful beats impressive. Givers lean toward desirable gifts while "receivers prefer to receive more practical gifts" (Baskin et al., 2014, via Yale Insights).
• No strings. Perceived manipulation weakens reciprocity, and business.com's respondents said "prominently branded items felt more like ads than tokens of appreciation". How to keep a logo small: logo or no logo.

The rest of this hub goes deeper: is a branded mug a good client gift, or cheap swag?, why the note matters and, for choosing the gift itself, the client gifts playbook.

How to Test Whether Your Client Gifts Work

Beltramini's design compared customers who got a gift with customers who didn't. You can copy that on a small scale without leaving anyone out, by sending the same gift at two times (our suggestion, not a study):

1. Pick one tier of clients you'd gift anyway.
2. Split the list at random into a "now" half and a "90 days later" half.
3. Send the "now" half their gift. Note replies and thank-yous within two weeks, then referrals, renewals and reviews within 90 days, for both halves.
4. Compare the halves, then send the second half the same gift.

With 20 or 40 clients, chance alone can swing the result, so read it as a hint.

What to Know Before You Order

• No promised return. We claim no sales return for any gift, ours included. What we state is what the box holds and what it costs, below.
• Gift limits. Each box is $35, delivered. Some employers and industries cap the gifts their people may accept; the limits, quoted from their sources: client gift limits by industry.
• The treats. LINDOR truffles contain milk, soy and barley malt (gluten); read the labels.
• Where we ship. The lower 48 states and Washington, DC, except Texas for now. No Alaska, Hawaii, Puerto Rico, other US territories, APO/FPO or international. The order page flags any row we can't ship to, so you can fix it or take it out.

Where Personalized Gifts Delivered Fits: A Useful Object, a Treat and a Note, in One Box

Our reading of these studies points to a useful object, a treat and a personal note, with no ad attached. Each Personalized Gifts Delivered box holds all of them:

• A useful object. An 11 oz white ceramic mug with your logo printed small (Small, up to 1½ in wide, is the default). In ASI's 2026 Ad Impressions Study, a promotional-products industry survey, 87% of end-users said they would keep a branded drinkware item "because of its usefulness" (ASI).
• A treat for now. Ghirardelli premium hot cocoa and 4 Lindt LINDOR milk chocolate truffles, packed inside the mug.
• A note in your words. Your message, printed on a textured card that greets each person by first name, in an envelope closed with a gold wax-seal sticker, lying on the lid so it's read before the box opens. In three experiments, people who wrote letters of gratitude "underestimated how positive recipients would feel" (Kumar & Epley, 2018).
• No ad. Your logo is on the mug only; the box, the tissue and the card carry none.

You add your logo (or type your website), write one message, add your address list and check the preview of the mug and every card before you pay. We print, pack and ship each box to its own address, at $35 per box, delivered, with no minimum: a logo mug gift box with Ghirardelli cocoa, Lindt truffles and a personal card.