Tiếng Việt · Proverb Attested

mất bò mới lo làm chuồng

In real, traceable use. Part of the curated seed collection; community review is coming.

Both English Tiếng Việt

Meaning · English

To take precautions only after the loss has already happened.

Nghĩa · Tiếng Việt

Chỉ lo phòng ngừa sau khi đã xảy ra tổn thất

Machine-translated — suggest a fix

Literally: Only worry about building the stable after the cow is lost.

Criticizing late safeguards — security, health, maintenance.

Where it’s used: Used Toàn quốc & hải ngoại · Vietnam-wide & diaspora

Bị hack xong mới đổi mật khẩu, mất bò mới lo làm chuồng.Changing your password only after being hacked — building the stable after the cow is gone.

Editorial example (illustrative, not a corpus attestation)

Equivalents & related

What does “mất bò mới lo làm chuồng” mean?

To take precautions only after the loss has already happened. Literally: Only worry about building the stable after the cow is lost.

Is “mất bò mới lo làm chuồng” formal or informal?

mất bò mới lo làm chuồng is generally neutral; connotation: critical.

What is the closest equivalent?

“close the stable door after the horse has bolted” (English) — direct equivalent.