A shortage occurs when the escrow account balance at its projected lowest point for the next 12 months is below the required minimum balance. This required balance is typically equal to two months of escrow payments. It helps to protect you, so you have enough funds in the account to cover an unexpected tax and/or insurance increase.
If your taxes and/or insurance costs were lower than expected, your account may have a surplus. If the surplus is $50 or more, those escrow funds will be transmitted back to borrowers in early April.