Per Diem Calculator for Domestic Travel for period 10/01/2024 - 09/30/2025

The mileage rate has increased to $.70 for travel occurring on or after January 1, 2025.  

All overnight Faculty/Staff/Grad Assistant/International or Student travel, regardless of destination, will need to complete the University-Sponsored Travel Notification.  In addition, University-Sponsored Domestic Student Travel will require trip leader(s)/faculty advisor(s) to submit a student roster to TravelNotification@illinoisstate.edu prior to trip departure.

University-Sponsored Travel Notification

University-Sponsored Travel Notification - How to Guide

60-day substantiation rule for travel reimbursement - The Internal Revenue Service requires travel reimbursements that are not submitted within 60 days of the completion of travel to be reported as taxable income.  Please review the substantiation rule, the consequences of non-compliance, the extenuating circumstances/exceptons, and best practices for timely reimbursement.