BECAUSE OF is neutral, whereas DUE TO is more formal.

Thanks a lot, guys.

I agree with Kevin Egan in that the two phrases largely have the same meaning. Although, I think that the difference between the two is mostly a matter of tone in most cases. “Due to” is more often used in polite speech or when the speaker is trying to maintain a serious tone. “Because of” is much more casual and although it’s not necessarily impolite it’s used most often in normal conversation. Other than that, the two phrases are arguably interchangable.

Hi, In many cases these phrases have the same meaning. For example, you could say: "He had to withdraw due to a knee injury" or "He had to withdraw because of a knee injury". Normally because of is used more in ordinary or familiar conversation.