The length of alimony depends on the specifics of each unique case. However, there are some typical assumptions that can be made. If the couple has been married for 10 years or more, lifetime alimony may be awarded. In other instances, alimony will be awarded for half the length of the marriage. That means if a couple was married for 8 years, 4 years of alimony is often awarded. However, it is important to note that alimony can last for any length, depending on what the parties agree on. It can even be a one-time lump sum payment.