Should You Reward Yourself for Reaching Goals?

Finish the project, book the massage. Hit the savings target, buy the headphones. Run all four days this week and Sunday's pastry is earned. The advice to reward yourself for reaching goals is so common it barely registers as advice anymore — it's treated as a law of motivation. Dangle something pleasant past the finish line, and the pulling power takes care of itself.

Psychologists have been testing that assumption for decades, and the answer they've arrived at is more useful than a yes or a no. Rewards can genuinely help. They can also quietly dismantle the exact motivation they were supposed to boost. Which one you get depends on conditions precise enough to fit on an index card: what kind of reward, whether it was promised in advance, and — strangest of all — whether you liked the task to begin with. The story starts at a nursery school drawing table.

The Good Player Award

In 1973, Mark Lepper, David Greene, and Richard Nisbett began by quietly observing preschoolers during free play, looking for the children who chose drawing on their own. Those children — 51 in the final sample — became the subjects of a classic experiment in the psychology of motivation. The selection detail matters more than it seems: every child in the study already liked drawing. The researchers weren't testing whether rewards can create interest. They were testing what rewards do to interest that already exists.

Each child was invited to draw under one of three conditions. One group was told about a certificate called the Good Player Award and agreed to draw in order to win it. A second group drew with no award mentioned and none given. A third group drew with no award mentioned — and then received the same certificate as a surprise afterward.

One to two weeks later, the drawing materials reappeared in the classroom, and observers covertly recorded how each child spent their free-play time. The children who had agreed to draw in order to win the award now spent 8.59% of that time drawing. The children who got nothing: 16.73%. The children who got the same award as a surprise: 18.09%.

Two details make this more than a curiosity. First, the children who expected the award didn't stop drawing — they still drew, just roughly half as much as the other groups. The reward didn't erase the interest. It eroded it. Second, the effect reached into the rewarded session itself: the expected-award children drew lower-quality pictures, rated 2.18 on a 1-5 scale by judges who didn't know which group each child was in, against 2.85 and 2.69 for the other groups.

And then the finding that reframes the whole experiment: the award itself wasn't the problem. The children who received the exact same certificate unexpectedly showed no drop in interest at all. Same certificate, same drawing session. The only difference was the deal struck beforehand.

When a Prize Rewrites Your Reasons

The researchers called this the overjustification effect, and the logic runs like this. Before the experiment, ask one of these children why they draw and the answer is simple: because drawing is fun. Psychologists call that intrinsic motivation — the activity is its own payoff. The deal added a second answer: to get the certificate. And once two explanations compete for the same behavior, the external one tends to win the argument. Drawing stops reading as play and starts reading as work — something you do to get something else. Take the certificate away, and what's left isn't the original love of drawing. It's a job with the salary removed.

Intrinsic motivation is the same engine that long-term goal pursuit runs on — we've written about that distinction in how to stay motivated. What the overjustification effect adds is a warning label: that engine can be disassembled from the outside, by a well-meaning deal you make with yourself.

Still, one study with 51 preschoolers and a paper certificate is a story, not a law. The serious question is whether the pattern holds beyond the nursery school — for adults, for money, for the goals you actually care about.

What 128 Experiments Settled (and What They Didn't)

By the late 1990s, enough experiments had accumulated to answer statistically. Edward Deci, Richard Koestner, and Richard Ryan gathered them into a meta-analysis of 128 experiments, published in Psychological Bulletin — and the relationship between rewards and motivation came out looking less like a verdict and more like a map.

The headline finding confirmed the preschool result: expected, tangible rewards reliably undermined intrinsic motivation for interesting tasks (d = -0.36 on free-choice behavior — whether people kept choosing the task once the reward was no longer available). Promise someone a prize for doing something they already enjoy, and on average they walk away less inclined to do it unprompted. But the same analysis drew boundaries that most retellings skip.

Start with praise. Verbal rewards — praise and positive feedback — enhanced intrinsic motivation (d = 0.33), making them the standout exception in the analysis. Praise arrives after the fact and carries no deal you were working toward, and in the data it pushed in the opposite direction from promised prizes. The enhancement was clear for college students (d = 0.43) but not statistically significant for children (d = 0.11) — this is an adult tool more than a parenting one.

Then the surprise condition, scaled up. Unexpected rewards did not undermine intrinsic motivation (d = 0.01) — the undermining only appeared when people did the task in order to get the reward. The meta-analysis was restating, at scale, the preschool study's sharpest detail: the deal, not the prize, does the damage.

One honest caveat before building rules on any of this: the meta-analysis was not the final word, because there isn't one. Eisenberger and Cameron had argued in a 1996 American Psychologist paper that the undermining effect is largely a myth; Deci and his colleagues replied; the disagreement is real and was never fully resolved. So treat the numbers above as what a meta-analysis of 128 studies found — strong evidence with contested edges, not physics.

Reward Yourself for the Boring Stuff

The boundary with the most practical value sits in the fourth row of that table: the undermining did not extend to boring tasks. In the studies that tested it, tangible rewards undermined intrinsic motivation for interesting tasks (d = -0.68) but had no significant effect on dull ones (d = 0.18). You can't poison a well that was never sweet. If a task holds no intrinsic interest, there's nothing for the reward to displace.

That cleanly splits your goal list in two. The tax paperwork, the inbox purge, the meal prep you'd never do for love — bribe yourself freely. Attach the pastry, the episode, the purchase. The undermining research is a warning about work you find interesting, and it simply doesn't apply where there's no inner motivation to protect.

The second safe zone is how you celebrate. Since unexpected rewards did no harm and praise enhanced motivation, the cleanest way to celebrate goals is after the fact and slightly off-script. Reaching a milestone and then deciding dinner is on you tonight is structurally different from spending six weeks working toward that dinner. And letting people who care about your goal tell you that you did well isn't an empty ritual — praise was the one reward in the analysis that moved intrinsic motivation upward, not down.

The Reward You Don't Have to Wait For

Everything so far treats a reward as an object waiting on the far side of a finish line. In 2017, Kaitlin Woolley and Ayelet Fishbach asked a different question: which rewards predict whether people keep going — the ones at the end, or the ones inside the pursuit itself?

Across five studies — New Year's resolutions, studying, gym workouts, healthy eating — immediate rewards predicted persistence better than delayed rewards. One definition matters enormously here: in these studies, "immediate rewards" didn't mean treats. It meant the experience of the activity itself being rewarding — the workout that feels good, the study material that's genuinely engaging. The reward is in the doing, not after it.

The resolution study is the sharpest version. Two months into the year, people stuck with their resolutions more when the pursuit felt enjoyable (β = .31, p = .004). How important the resolution was did not significantly predict persistence at that point (β = .14). Importance predicted people's intentions and expectations — delayed rewards predicted expected future persistence at β = .42. Enjoyment predicted what people actually did.

Their internal meta-analysis across all of their studies made the gap explicit: immediate rewards predicted actual persistence at β = .35, delayed rewards at β = .09. Delayed rewards weren't useless — they still predicted persistence, just far more weakly, and they may be what motivates setting the goal in the first place. But the enjoyment of the pursuit is what predicted the follow-through. All of this is correlational, so the careful claim is "predicted," not "caused" — yet as a bet about which goals you'll still be working on months from now, it's a well-grounded one.

The practical move isn't to buy yourself more things. It's to choose the most enjoyable version of the goal that still counts. The gym format you look forward to over the one you dread. The book that makes the subject come alive over the definitive doorstop. We've covered two systematic versions of this: building the reward into the loop itself in how to build habits, and temptation bundling — pairing the thing you crave with the thing you avoid, so the pursuit pays you in real time.

Four Questions Before You Promise the Prize

Put the threads together and the contradictory-sounding advice — rewards backfire, rewards help, celebrate, don't bribe — collapses into four questions you can run in about a minute.

Do you already enjoy the activity? Then don't attach a promised prize to it. This is exactly where the undermining lives: expected, tangible rewards on interesting tasks. If you love climbing, writing, or coding, a reward agreed in advance risks converting play into work — the preschool effect, replayed in adult form. Work you love doesn't need a bribe. For the days the love runs dry, what it needs is a system.

Is the task genuinely dull? Bribe away. Rewards showed no significant effect on intrinsic motivation for dull tasks, because there was none to lose. This is the proper home of self-rewards: chores, paperwork, the unavoidable tedium orbiting every meaningful goal.

Is the reward a deal or a surprise? Deals — agreed in advance, performed for — are the structure that did the damage. Surprises did none, and praise helped. So celebrate goals after you reach them, a little spontaneously, and let the people who matter tell you that you did well. The closer your celebration sits to "unexpected certificate," the safer it is.

Would a typical month earn you less than the full reward? Then redesign it. Rewards graded on performance, where most people earn less than the maximum, showed the largest undermining of all (d = -0.80) — the structure the meta-analysis authors called "the most detrimental type of rewards." The all-or-nothing challenge — the full prize for a perfect streak, nothing for 26 days out of 30 — is that structure, self-inflicted.

The Deal Is the Damage

Back at the nursery school, the unsettling detail isn't the 8.59%. It's that nobody took anything away from those children. They were given something — a certificate — and the deal attached to it cost them a piece of the reason they drew. That's the trap worth avoiding: not rewards, but rewards that quietly renegotiate why you do what you love.

So audit one deal you currently have running with yourself. Name the task, then answer honestly: would you do any version of it without the prize? If no — keep the bribe; it's doing legitimate work on a task with nothing to lose. If yes — cancel the deal, keep the celebration, and spend the effort making the pursuit itself feel better instead. The goal doesn't need a prize waiting at the end. It needs you still wanting to show up next week.