Jafar: Giving you your reward...your eternal reward!
Bad guys cannot be trusted. As such, whenever one promises a valuable but suspiciously unspecified "reward" for completing a task or providing information or something that benefits the baddie in some way, beware: said "reward" will probably be a quick death (if you're lucky). Generally a sign of gross incompetence on the part of the villain if this is done to a minion, since competent minions are pretty valuable.
Common in fantasy genre.
Compare You Have Failed Me and You Have Outlived Your Usefulness, in which the subject is killed in similar circumstances; though usually as a result of failure or part of a grand design, as opposed to being given a task or opportunity, fulfilling it competently, then being killed anyway. Also compare Rewarded as a Traitor Deserves, a subtrope which is this in specific cases where the victim has actively and knowingly betrayed their party to their killer in some way. Enforced in a more literal sense in cases where the victim actually wants to die, particularly in cases they can't do it themselves.
As a Death Trope, all Spoilers will be unmarked ahead. Beware.
- Aladdin. Jafar's plan for Aladdin after he gets him the lamp: stab him, leave him to die and take the lamp back to Agrabah. Luckily it fails.
Aladdin: What are you doing?
Jafar; Giving you your reward...your eternal reward!
- Dreamworks' The Road to El Dorado: The wicked high priest Tzekel-Kan seeks to destroy the posers Miguel and Tulio by using a huge stone jaguar. Tzekel-Kan's faithful flunky is mixing the magic potion, but something seems to be missing from the recipe. Tzekel-Kan deduces that his minion must perish in order to give the stone icon life, and promptly pushes his stooge into the roiling ooze.
- The roachlike cook of salvage station Tau 14 from Don Bluth's Titan A.E. eagerly points out which passageway the fleeing Cale Tucker and Captain Korso have taken. The Drej reward him for such honesty by shooting an energy blast down his throat. His last word is an apt "bullseye."
- The Hobbit. Semi-heroic-ish example in Thranduil, who promises to "free" the captive orc in exchange for information. After getting said information, the orc is swiftly decapitated and Thranduil justifies this by claiming he "freed his wretched head" from his body.
- Hudson Hawk. Hawk's parole officer probably shouldn't have demanded "his cut" from a Literal-Minded Knife Nut.
- Sneakers. After the protagonists steal the black box from Janek, Martin and Crease go to the men who hired them to receive their payment. Crease learns that Janek has been murdered and that they're being set up for execution. He calls Martin over to him and they escape before the men can kill them.
- Doctor Who: In Dragonfire, Kane rewards the sculptor who just finished carving a life-sized statue of Xana by letting him look at the statue as Kane kills him.
- Jessica Jones. The fate of Detective Clemens is this after revealing the probable locations of Jessica and Kilgrave to Officer Simpson.
- Once Upon a Time in Wonderland. Jafar does something similar here with the Grendel, promising to "reunite" him with his dead wife in exchange for information. Of course, after getting said information, Jafar promptly kills him.
- Person of Interest. The "bank manager" working for Decima who stole and delivered the Samaritan drives to Greer was thanked with a bullet through the chest.
- One of the Arabian Nights has a djinn trapped in a bottle. At first he'll willingly becomes his liberator's slave, after a few hundred years go by he'll grant them three wishes, and after a few hundred years more he'll kill the person that frees him. When a fisherman comes along and does just that, the djinn explins his reasoning and gets ready to kill him. The fisherman expresses his incredulity that so huge and powerful a djinn could fit in a tiny bottle. The djinn demonstrates, and the fisherman puts the seal back on.
- Ex Mortis: The second game ends with the player character being rewarded for bringing an Eldritch Abomination back to power with a quick death.
- At one point in Papers, Please, Vonel will ask if you've ever heard of the Order of the EZIC Star. You can hand him a coded document you received from an EZIC operative and get arrested for associating with suspicious persons. In the Steam version you'll also unlock the achievement "Too Honest".
- Awful Hospital's setting has extremely broad notions of life, death, and morality, so when BBQ Girll kicks Fern into a meat grinder in "thanks" for her help, it's with the full expectation that a new instance of Fern will come back to enjoy the sandwich they make out of her old body. Fern's soon restored to life, but can't quite stomach the thought of the sandwich.
- Referenced in The Order of the Stick. One of the hobgoblins who found Xykon's missing phylactery makes sure to ask his superior if the reward is real, and not "an ironic 'final reward' reward."
- In the Superman: The Animated Series episode "Apokolips... Now!", after the mobster Bruno Mannheim (who was hired by the alien warlord Darkseid under promises of wealth and power) completes his last mission (to blow up a nuclear reactor on an island), he is left behind to die.
Mannheim: You promised you'd make me a king!
Darkseid: And so you are. King of FOOLS! (ends transmission)