How Oportax works
Four jobs come off your desk: tracking your imports, getting verified emissions data from your suppliers, tracking your liability each quarter, and preparing the return for you or your customs agent to submit.
1. Import upload and classification
Drop in your customs broker export, ERP file or CSV. Oportax reads each line, removes duplicates and maps it to a CBAM commodity code, separating in-scope goods from the rest.
In the product
- Broker, ERP and CSV imports, with column names matched for you
- Automatic in-scope flagging by commodity code
- Line-level liability calculation as data is added
- Period-aware (annual to 2028, quarterly thereafter)
2. Supplier requests and chasing
We write to each supplier in their own language and chase every 7 days, with your name in the sender line and your own contact copied in. You can send the first request from your own mailbox instead.
In the product
- Requests translated into the supplier's language and reviewed before sending
- Reminders every 7 days, up to three
- Mark offline responses (phone, WhatsApp) into the same workflow
3. Threshold and liability tracking
Your liability is recalculated as each supplier's data arrives and reported by quarter, with a sector breakdown and supplier exposure.
In the product
- Quarterly liability dashboard
- Default vs verified comparison in £
- Supplier comparison ranked by emission intensity
- Supplier cost comparison, including CBAM: coming 2027
4. Return and audit pack
When the period closes you get a PDF for review and a CSV for HMRC's process. Oportax prepares your return and audit pack. You or your customs agent submit it to HMRC.
In the product
- CBAM return and audit pack
- Director sign-off report
- Managed filing: planned for 2027
See it with your own import data
Book a 30-minute call and we'll walk through it with your real import profile.
Book a call