Payment types may be set up to automatically create an adjustment when a payment is within a certain dollar amount above or below the amount to be applied. This range is called a threshold, and the adjustment makes the fee paid in full. For example, a payment type has a threshold of $5 over or under. If a fine is $100, a payment can be made for anywhere from $95 to $105 and the fine is paid in full. Any amount paid below $95 will still show a charge remaining on the account, while any amount over $105 will be refunded.

In most cases, the over or underpayment within the threshold is assigned to designated fee code accounts. An overpayment credits the appropriate fee code account while an underpayment deducts from the appropriate fee code account. Even if the payment exceeds the threshold, the excess can still be assigned to the designated fee code accounts depending on the payment type setup. This may be used if a mail-in payment exceeds the amount due or there is an overage on a tender method that does not allow change.