The Automated Commercial Environment (ACE) is the system US Customs and Border Protection (CBP) uses to process all commercial imports entering the United States. For truckers crossing into the US from Canada or Mexico, filing an ACE eManifest is mandatory. It notifies CBP of what you are bringing across the border before you arrive, enabling pre-arrival risk assessment and faster processing at the port of entry.
Filing late, filing incorrectly, or not filing at all can result in delays, fines, and denial of entry. This guide covers the entire eManifest process — who must file, what data is required, filing timelines, and how to avoid the most common mistakes.
What Is the ACE eManifest?
The ACE eManifest is an electronic advance cargo declaration filed with CBP before a commercial vehicle crosses into the United States. It contains details about the carrier, the truck and driver, the shipment, and the commodity being transported.
ACE replaced the legacy Automated Commercial System (ACS) and consolidated multiple customs functions into a single platform. For truck transportation specifically, the eManifest serves as the electronic equivalent of the paper manifest that carriers were historically required to present at the border.
Who Must File?
Carriers transporting commercial goods into the United States by truck are responsible for filing the ACE eManifest. This includes:
- Canadian carriers entering the US with commercial cargo
- Mexican carriers entering the US with commercial cargo
- US carriers returning from Canada or Mexico with commercial goods
- Any carrier transporting in-bond shipments through the US
The filing obligation falls on the carrier — not the shipper or importer. However, many carriers use third-party service providers (like eManifest platforms, EDI providers, or customs brokers) to file on their behalf.
Empty trucks entering the US from Canada do not require an eManifest if they are truly empty and not carrying any commercial goods, but CBP may still require a manifest in certain situations. Many carriers file even for empty crossings to avoid questions at the port.
Filing Timeline
For truck shipments, the ACE eManifest must be filed at least 1 hour before arrival at the US border crossing. CBP uses this lead time to run risk assessments against the shipment data.
In practice, most carriers and service providers file 2-4 hours before arrival — or even the night before — to allow time for any corrections or holds to be addressed before the truck reaches the port.
Late filings (less than 1 hour before arrival) may result in the truck being held at the border until the manifest clears. Repeated late filings can result in penalties.
Required Data Elements
An ACE eManifest for truck transportation requires the following information:
Carrier Information
- Carrier name and SCAC (Standard Carrier Alpha Code)
- Carrier FMCSA USDOT number
- ACE carrier account number (assigned during registration)
Conveyance (Truck) Information
- License plate number and state/province of issuance
- Vehicle Identification Number (VIN) — for the tractor
- Equipment type and description
- Trailer number and license plate (if applicable)
Crew Information
- Driver name, date of birth, citizenship
- Travel document type and number (passport, FAST card, CDL with WHTI compliance)
- FAST card number (if applicable — expedites processing)
Shipment Information
- Shipper name and address
- Consignee name and address
- Country of origin
- Commodity description and quantity
- Weight and value
- Harmonized System (HS) tariff code
- Bill of lading number or unique shipment reference
PAPS (Pre-Arrival Processing System)
For US-bound shipments, each customs entry requires a PAPS barcode. The customs broker on the importer's side creates the PAPS entry and provides the PAPS number to the carrier. The carrier includes this PAPS number in the eManifest. At the border, CBP matches the eManifest data against the PAPS entry to determine whether the shipment is cleared for release.
How to Register for an ACE Portal Account
To file eManifests directly, carriers must register for an ACE Secure Data Portal account:
- Go to ace.cbp.dhs.gov
- Submit an application for portal access
- Provide your SCAC code, USDOT number, and business details
- CBP reviews and approves the application (allow 1-2 weeks)
- Receive login credentials and set up your account
Once registered, you can file eManifests through the web portal. However, most carriers with regular cross-border traffic use a third-party EDI (Electronic Data Interchange) provider for automated filing — manual portal entry is practical only for occasional crossings.
Third-Party Filing Services
Most cross-border carriers use a service provider rather than filing directly through the ACE portal:
- Dedicated eManifest platforms — cloud-based services built specifically for ACE/ACI filing with dispatch integration
- EDI service providers — companies like Descartes, CustomsCity, and other trade compliance platforms
- Customs brokers — many brokers offer eManifest filing as part of their cross-border service package
These services integrate with your dispatch system, auto-populate carrier and driver data, and handle both ACE (US-bound) and ACI (Canada-bound) filings. Monthly subscription costs range from $30-$150/month plus per-transaction fees.
TruckerPro's eManifest integration connects directly with leading eManifest providers to streamline the filing process for your cross-border shipments.
ACE vs ACI: US-Bound vs Canada-Bound
| ACE eManifest | ACI eManifest | |
|---|---|---|
| Direction | Goods entering the United States | Goods entering Canada |
| Agency | US Customs and Border Protection (CBP) | Canada Border Services Agency (CBSA) |
| Filing deadline | 1 hour before arrival (truck) | 1 hour before arrival (truck) |
| Reference system | PAPS (Pre-Arrival Processing System) | PARS (Pre-Arrival Review System) |
If you run cross-border regularly in both directions, you need to file eManifests with both CBP (ACE) and CBSA (ACI). Most third-party providers support both systems.
Common Filing Errors and How to Avoid Them
1. Incorrect PAPS Number
The PAPS number must exactly match the customs broker's entry. A single digit error will cause a mismatch, and the shipment will be held at the border until corrected. Double-check PAPS numbers with the customs broker before filing.
2. Missing or Incorrect Driver Information
Travel document numbers, names (as they appear on the document), and dates of birth must be exact. A misspelled name or wrong passport number triggers an inspection or hold.
3. Late Filing
Filing less than 1 hour before arrival puts you at risk of a hold. Build filing into your dispatch workflow so it happens 2-4 hours before the expected arrival time.
4. Inaccurate Weight or Commodity Description
CBP uses declared weight and commodity data for risk assessment. Significant discrepancies between declared and actual weight can trigger an inspection. Be accurate.
5. Not Amending the Manifest
If anything changes after filing (different driver, different trailer, additional shipments added), you must amend the manifest before arriving at the border. Arriving with an outdated manifest causes delays.
Hold and Release Process
After you file the eManifest, CBP processes the data and assigns a status:
- Released — the shipment is cleared. Present yourself at the port of entry and proceed through the designated lane.
- On hold — CBP has flagged the shipment for additional review. This could be a random inspection, a data discrepancy, or a risk-based selection. Wait for CBP to update the status or prepare for an inspection at the port.
- Do not load — CBP has an issue with the shipment that must be resolved before it crosses the border. Contact your customs broker.
Check the manifest status before heading to the border. Arriving at the port with a shipment on hold wastes time for everyone.
Penalties for Non-Compliance
CBP can impose penalties for:
- Failure to file: $5,000 per occurrence
- Late filing: $5,000 per occurrence (at CBP's discretion)
- Inaccurate data: Varying penalties depending on severity
- Failure to amend: Penalties for presenting a manifest that does not match the actual shipment
These penalties are enforced at CBP's discretion, and first-time violations may receive a warning rather than a fine. However, repeat offenders face escalating consequences including increased inspections and potential denial of border privileges.
Key Takeaways
ACE eManifest filing is a non-negotiable requirement for any carrier transporting commercial goods into the United States. File at least 1 hour before arrival (2-4 hours is better), ensure all data matches exactly (especially PAPS numbers and driver documents), and use a third-party service provider if you cross regularly.
Build eManifest filing into your standard dispatch workflow for cross-border loads. The carriers that experience the fewest border delays are the ones that file accurately, file early, and verify the status before approaching the port. For a complete overview of all cross-border requirements, see our Canada-US guide.