Whether or not your business letter has a subject line usually depends upon the format. However, crafting a winning subject line is crucial to the success of your letter regardless of whether you actually use it in the final delivery.When you send you a business letter as an email, you’ll absolutely need a subject line. You could even argue that the subject line is more important than the content of the letter itself. That paper business letters often eschew the subject line doesn’t mean the process of creating them isn’t vital — and some business letter formats do accommodate a subject line.
With business letters, the goal of a subject line is not to summarize. Rather, the goal is to tell your audience why they should read the letter. If you send your letter via email, a good subject line will get your letter noticed — the first step toward actually reading it.
Ultimately, crafting a good subject line enables you to write a better letter. It’s your mission statement and answers the question: Why should I bother reading this letter? The key to answering that question effectively is to put your audience first and understand what is important to them.
Ask yourself, “would I read this?” If the answer is not an emphatic “YES,” keep working on it.