How Much is Enough?
To determine how much disability insurance you need, the California Department of Insurance suggests you add up your necessary monthly expenses -- such as housing, car loans, food, utilities, and child care -- and then subtract any investment income. This is the amount you need to cover expenses in case of disability.
Then add up whatever monthly long-term disability payments you would get from you employer, and add to it your spouse's take-home pay. This is your income in case of disability.
If your second subtotal is greater than your first, you probably have adequate coverage. But if your second subtotal is smaller than the first, subtract your spouse's take-home pay from the first subtotal to see how much additional monthly coverage you should get for yourself.