When to use commas in a sentence that starts with "finally", "additionally", etc.?

If I have a sentence that starts with additionally, finally, consequently, etc. do I always have to put a comma after it? Or is there a different rule?

Solution 1:

A sentence adverb (or a disjunct or an introductory adverbial element) should be followed by a comma in certain circumstances. You can find all the information you could possibly want here:

grammartips.homestead.com/adverbs2.html

Solution 2:

If starting a sentence with an introductory word or phrase then, yes, a comma would be required.

If you need money ask grandma for a loan. Alternatively, rob a bank.

You would not need a comma if the word is used as an adverb in mid-sentence:

I finally had my refrigerator repaired.