How to say "bonus" in Japanese

• ボーナスJLPT N2approx.Common
  nounThe everyday word for a bonus paid by an employer on top of regular salary; this is what you want for the usual sense of 'bonus' in conversation and writing.
  ボーナス全部ぜんぶを買い物かいものと旅行りょこうに使つかってしまった。↗

  I blew my whole bonus on shopping and travel.
• 賞与しょうよCommon
  nounCovers the same employee bonus but in formal language: it is the term you meet in company rules, contracts and pay documents rather than everyday talk.
• 割り増しわりましCommon
  no-adjective, suru verb, transitive verbIts 'bonus' sense is only an added premium: an extra charge or fare, or an increase stated in tenths, not a payment given as a reward.
  割り増し料金わりましりょうきんはいくらでしたか。↗

  How much was the additional charge?
• 手当てあてJLPT N1approx.Common
  noun, suru verbSeldom the word you want for 'bonus': it really means pay, compensation or an allowance such as a housing allowance, so it fits regular or compensatory payments, not a bonus.
  会社かいしゃは通常つうじょうの月給げっきゅうの他ほかに諸手当しょてあてで毎月まいつき１０万いちれいまん円えん払はらってくれる。↗

  The company pays me 100,000 yen in various allowances a month in addition to the regular salary.
• 一時金いちじきんCommon
  nounA lump-sum payment: it presents the bonus as a single one-time payment rather than part of regular pay.

Use 「ボーナス」 for the everyday employee bonus, 賞与 in formal company or contract language, 一時金 when stressing a one-time lump sum, while 「割り増し」 is an added premium and 手当 means pay or allowances, not a bonus.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• ボーナスbonus
• 賞与しょうよbonus
• 割増わりましextra (charge, fare, etc.)
• 手当てあてsalary
• 報奨ほうしょうbonus
• 慰労金いろうきんbonus
• 割り増し金わりましきんpremium
• 賞与金しょうよきんincentive
• 一時金いちじきんbonus