に越したことはない【にこしたことはない】

The expression に越したことはない means "there's nothing better than ~", "it's best to ~", or "~ would be ideal". It is used to express that while something may not be absolutely necessary, it is the most desirable or safest option. The literal sense is "there is nothing that surpasses ~."

Basic usage

This pattern is used to recommend the ideal course of action, often with the nuance that while alternatives exist, the stated option is clearly the best.

Structure

The pattern attaches to the plain form of verbs, adjectives, and nouns:

• Verb (plain form):いく行く
  • に越したことはない → 行くに越したことはない
• Verb (negative):のまない飲まない
  • に越したことはない → 飲まないに越したことはない
• い-adjective:やすい安い
  • に越したことはない → 安いに越したことはない
• な-adjective:しずか静か
  • な + に越したことはない → 静かなに越したことはない (or しずか静か
    • であるに越したことはない)
• Noun:げんきん現金
  • に越したことはない → 現金に越したことはない

Nuance

This expression often carries a tone of practical wisdom or common sense. The speaker acknowledges that the ideal situation may not always be achievable, but states it as the best-case scenario. It frequently appears with expressions like できれば (if possible) or もちろん (of course).

It can also be used with negative forms to suggest that not doing something is the best option:

Polite form

In polite speech, ない at the end can become ありません: