Two simplified procedures operate in UK imports: the simplified declaration, with reduced data at the border, and EIDR, where goods are released on an entry in the company's own records. Full data follows in a supplementary declaration and payments come off a deferment account. The simplifications require an HMRC authorisation, though importers often work under their agent's.
How does the simplified declaration differ from EIDR?
Both variants belong to the simplified customs declarations process and share a skeleton: less data at the moment of import, a full supplementary declaration afterwards, charges paid at the supplementary stage. The difference lies in the first step. Under SDP a reduced declaration is lodged in CDS at the frontier. Under EIDR the first trace is an entry in the declarant's own records: goods can be released without engaging HMRC systems at the moment of import, which with a well-run process means minimal formalities at the crossing. The supplementary declaration follows within the set deadline and the charges come off a deferment account, whose mechanics we describe in our piece on the duty deferment account.
Who can use it, and on what conditions?
The simplifications require an HMRC authorisation. The company must show reliable records, customs compliance and solvency, and for EIDR additionally the ability to keep records that can reconstruct any import at any time. Not all goods qualify for EIDR: selected controlled and sensitive categories are excluded. In practice the most common model is that the customs agent holds the authorisation and serves importers under it; HMRC allows this arrangement, each time on the agent's terms and procedure. That lifts the whole authorisation process off the importer.
What does an importer gain on the Poland-UK route?
- Faster release: less data required at the border crossing means a lower risk of holds caused by formal gaps.
- Cash flow: charges are settled in bulk with the supplementary declarations, from a deferment account, instead of per vehicle.
- Operational predictability: with regular, repeatable imports the process is set up once and runs serially.
In the ro-ro model across the Channel the simplifications work hand in hand with GVMS: the declaration, including a simplified one, must exist before the crossing and be linked into a GMR, as described in GVMS: how it works and the carrier's role.
When do the simplifications pay off, and when not?
The winners are companies with a regular stream of similar imports: serial component deliveries, cyclical warehouse replenishment, a stable product range. For occasional or highly varied imports the benefit shrinks, because every supplementary declaration still needs full tariff data. Then a standard declaration prepared by an agent is simpler, as in our transport service with clearance on both sides, described in UK customs clearance after Brexit. The choice is worth calculating on your own volumes.
Simplifications and audits: the other side of the coin
Less data at the border does not mean less responsibility, only responsibility shifted in time. HMRC authorises the simplifications precisely because it gains the right to inspect the company's records in exchange, and it uses that right regularly: audits of authorisation holders check whether register entries match physical deliveries, whether supplementary declarations land on deadline and whether the tariff data is correct. Neglected records are the shortest route to a withdrawn authorisation, after which the company returns overnight to full frontier declarations, which can destabilise the whole supply chain. Before entering the simplifications, honestly assess your documentary discipline: procedures, named owners, the supplementary declarations calendar and internal consistency checks. If the process runs on an agent's authorisation, the same requirements apply in the relationship with the agent, who answers to HMRC for the quality of declarations lodged in your name.
Sources
- GOV.UK: using simplified declarations for imports (accessed 17 Aug 2026)
- GOV.UK: simplifying declarations for imports and exports (accessed 17 Aug 2026)
Importing to the UK regularly and wondering whether the simplifications fit your volumes? Write via our contact form: we will analyse the process together with the clearance service.
