If you have questions about your bill, please email dacbilling@vumc.org or call 615-936-1922.
DAC Billing Cycle for FY26
July  | August  | September  | October  | November  | December  | January  | February  | March  | April  | May  | June  | |
| DAC Billing Start Date | 6/25  | 7/26  | 8/26  | 9/25  | 10/28  | 11/22  | 12/27  | 1/27  | 2/24  | 3/26  | 4/25  | 5/23  | 
| DAC Billing Close | 7/25  | 8/25  | 9/24  | 10/27  | 11/21  | 12/26  | 1/26  | 2/23  | 3/25  | 4/24  | 5/22  | 6/24  | 
| Care Days in Cycle | 30 days  | 30 days  | 29 days*  | 33 days  | 25 days*  | 35 days*  | 31 days*  | 28 days  | 30 days  | 30 days  | 28 days*  | 33 days  | 
| iLab Invoice Review Day | 7/31  | 8/29  | 9/30  | 10/31  | 11/28  | 12/31  | 1/30  | 2/27  | 3/31  | 4/30  | 5/29  | 6/30  | 
*Number of Care Days in Cycle affected by holiday
Adding and Changing Billing & Payment Sources (VUMC Worktag, VU Poet #, and VA 99999#)
Users are charged and invoiced monthly based on services rendered. All charges to users whether internal (VUMC) or external (non-VUMC) are be billed using the central billing system (iLab). Topaz-Elements generates monthly invoices for cage care days and animal orders. Topaz-Elements invoices are billed monthly via iLab to ensure that charges can be reviewed and posted to the General Ledger (G/L) in a timely manner. The importance of timely charging each month cannot be overstated; it allows for proper monitoring by users, administrators, and research management. It also facilitates proper accounting practices, timely error correction, allows for on-time filing of Final Status Reports (FSR) to sponsors, and reduces the need for retroactive cost transfers.
Topaz-Elements:
To add or change a payment source in TOPAZ, complete this form.
iLabs:
To add or change a payment source in iLab, contact your department administrators.
VUMC employees must log in via VUMC iLab. Use Registration Instructions: Access to iLab Solutions for VUMC Users to create an iLab account. 
VU employees and students must log in via VU iLab. Use Registration Instructions: Access to iLab Solutions for VU Users to create an iLab account.
Additional General User Support and User Guides are available on the Office of Research Webpage.