CBSA EDI and eManifest downtime schedule for 2026: what breaks, what doesn't, and when to file early
CBSA published its 2026 scheduled maintenance calendar for EDI, eManifest, and CERS portals. Most are early Saturday mornings. Here's which filing windows close, which contingencies work, and when you need paper backups ready.
The 2026 maintenance calendar is out
CBSA posted the full year of scheduled EDI, eManifest, and CERS portal outages for 2026. Most fall on early Saturday mornings, typically starting around 04:00 Eastern and running two to four hours. The official notice names January 10, February 7, March 7, April 11, May 9, June 6, July 11, August 8, September 12, October 10, November 7, and December 5 as the confirmed dates.
If you file CADs on weekends or your freight moves Saturday morning, these windows matter. If your broker submits eManifest ACIs Friday night for a Saturday cross-border pickup, you need to know whether the pipe is open or closed. Same logic applies to any CERS export declaration filed late Friday for a Saturday departure.
What goes dark during maintenance
EDI transmission for CADs stops. You cannot file a Commercial Accounting Declaration electronically during the window. PARS and RMD release messages queue but do not transmit until the system comes back. If CBSA examined a container Thursday and you planned to file the corrected CAD Saturday morning at 06:00, that filing waits until maintenance ends.
eManifest ACI (Advance Commercial Information) submission also goes offline. Carriers cannot file cargo control documents. If a truck is crossing the border during the outage and the ACI was not transmitted beforehand, the driver sits at primary until the portal reopens or CBSA accepts a paper contingency at their discretion.
CERS export declarations follow the same rule. If your exporter planned to file Saturday morning for a Saturday afternoon departure, the electronic option is unavailable.
What continues: CARM Client Portal logins usually remain available for viewing existing records, but you cannot submit new declarations or pay duties during EDI downtime. The RPP bond does not care about the outage because release already happened, but if you needed to post a one-time financial security on a Saturday, expect delays. Phone and email to regional CBSA offices remain open, though weekend staffing is thin.
Practical workarounds
File CADs by end of business Friday if your release can wait until Monday. Most commercial importers are not moving freight off the dock Saturday morning anyway. If you are, talk to your broker Thursday and confirm the filing sequence. PARS and RMD both allow a 48-hour filing window post-arrival in many cases, so a Friday arrival can usually absorb a Saturday outage without penalty.
For eManifest, carriers should transmit ACI no later than Friday evening if the load crosses Saturday. The one-hour pre-arrival rule still applies, but given that the portal may be offline, submitting the ACI twelve hours early eliminates risk. If a carrier misses that window and the truck arrives during maintenance, CBSA may accept a paper manifest at primary, but processing times double and the driver waits.
CERS filers should similarly move their export declarations to Friday afternoon. CBSA allows early filing as long as the goods have not yet departed Canada. A Friday 16:00 submission for a Saturday 14:00 departure is compliant and avoids the outage entirely.
Paper contingency is the last resort. CBSA still accepts Form A8A (Cargo Control Document) and handwritten B3-style accounting declarations in emergencies, but the processing queue is long and the data does not flow into CARM automatically. You will need to reconcile manually on Monday, and if the load requires compliance review or SIMA verification, expect a multi-day hold.
When the timing actually hurts
Cross-border just-in-time freight moving Saturday morning is the obvious pain point. Automotive parts, fresh produce under CFIA inspection, and any load with a Monday morning delivery window all compress around these outages. If your inbound drayage from the border to a Montreal sufferance warehouse is scheduled Saturday at 08:00 and the ACI was not filed Friday, the truck sits at Lacolle until the system reopens. That delay cascades into weekend dock labour costs and Monday delivery failures.
Exporters shipping perishables Saturday also feel it. A reefer load of seafood departing Halifax for Europe needs the CERS declaration filed and the export manifest closed before the vessel sails. If the portal is offline and the shipper waited until Saturday morning, the container misses the sailing.
CAD amendments during an exam are another edge case. CBSA flags a container for inspection Friday afternoon. The officer completes the exam Saturday morning and emails the broker with a quantity discrepancy. The broker cannot file the amended CAD until the portal reopens. The container sits in sufferance until Monday, accruing storage and handling fees.
Filing rhythm changes under CARM
Pre-CARM, brokers could batch-file paper B3s Monday morning for a week of prior releases. CARM tightened that window. CADs must be filed within five business days of release, and if your RPP bond is sized close to the monthly limit, weekend delays can push you over the threshold before the next K84 statement clears your account.
The monthly accounting cycle now runs through the CARM Client Portal, and CBSA calculates financial security utilization in near real-time. A four-hour Saturday outage does not change the five-day filing rule, but it does compress the available filing hours if your broker planned to clear a backlog over the weekend. That compression matters most in high-volume periods like December and January, when the January 10 outage falls during post-holiday catch-up.
Mark the calendar now
Print the twelve dates and share them with your carrier, your broker, and your warehouse. If your import or export schedule puts freight in motion Saturday mornings, adjust the filing deadlines by 24 hours. If your broker is filing CADs Saturday to manage their own workload, confirm they know the windows and can shift to Friday.
Most of these outages are invisible to Monday-to-Friday shippers. If your freight moves weekdays and your broker files during business hours, you will never notice the downtime. But if you run weekend operations or your carrier delivers Saturdays, these four-hour windows turn into multi-day holds when the contingency plan is missing.
We file CADs seven days a week when the system is open, and we keep the paper backup ready when it is not. If your weekend schedule depends on electronic filing and you are not sure whether your current broker has a Saturday contingency, get in touch.
Source: CSCB