When should I use the phrase better late than never?

Use “better late than never” when you are discussing something that is being done behind schedule, or when responding to someone who is informing you of something they are doing in a tardy manner (e.g., “It’s great you’re learning how to cook; better late than never, I always say”).

It can be used in a sarcastic manner, particularly by the person receiving the action that is late (e.g., “Thanks for the birthday gift, even though it’s two months late. Better late than never, I guess”).