Debt and Claims Management -- Online Customer Service

My payment was a few days late. Will I be charged a late fee?

No, Out of Service does not specifically charge a "late fee" to your account for late payments. 
However, the Debt Collection Improvement Act of 1996 authorizes the accrual of interest, administrative fees, and penalty charges on unpaid debts over 30 days old. 
Interest, Penalties and Administrative charges (IPA) are assessed to your debt's principal balance and are calculated as follows:
Interest
Your account statement reflects the Treasury interest rate for your debt, and interest will begin to accrue on the unpaid principal balance 30 days after the initial debt notification date. 
Your daily rate is calculated by dividing the interest rate assessed on your account (%) by the number of days in the year (365) then multiplied by the dollar amount of your previous principal balance for the daily interest charge to your account.  This daily interest charge is then multiplied by the number of days elapsed between payments.
Administrative Fees
An administrative fee of $10.00 will be assessed to your account if we send a final notice letter for payment and/or for each instance that a personal check was unable to be processed by the bank due to "insufficient funds".
An administrative fee of $17.00 is assessed if your federal income tax return is offset by Treasury and sent to Out of Service Debt and Claims Office for the repayment of your debt(s). This fee is also assessed with each occurrence of offset.
Penalty Charges
If our office has not received a payment within 121 days of your initial debt notification date, penalty charges equal to 6% of the unpaid principal balance will begin to accrue on your account.