CBP Pushes Postal Formal-Entry Compliance to January 20, 2027 — What Mail Shippers Should Do Now

What happened

Two CBP actions landed in the Federal Register on October 22, 2026, and together they reset the compliance clock for anyone shipping goods to U.S. buyers through the international postal network:

1. Formal-entry compliance extended to January 20, 2027. The June 24, 2026 interim final rule (91 FR 37801) made three categories of mail shipments ineligible for the new postal informal entry process: goods subject to Partner Government Agency (PGA) requirements, goods subject to duties under Chapter 98 or Chapter 99 of the HTSUS, and goods claiming duty-free treatment under Chapter 98 or a Free Trade Agreement. Those shipments must file a formal entry under 19 CFR 145.12(a)(2)(v) and (vi) — and CBP had set the compliance date at October 22, 2026. Today's final rule moves that date to January 20, 2027.
2. Entry Type 13 test relaxed. The same day, CBP modified the ongoing test of the new electronic informal entry process for mail (Entry Type 13) so entries can be transmitted with or without electronic PGA data. The voluntary test, open to qualified shipments valued at $2,500 or less, began September 22, 2026.

CBP's stated reason for the extension: importers, brokers and logistics providers in the postal channel need more time to update internal systems, build data-submission procedures and develop the technological infrastructure the formal-entry requirement presumes — and forcing the October deadline risked "disruptions in the flow of important international postal shipments."

The mail timeline so far

Date	What changed
2025-08-29	EO 14324 suspends the $800 de minimis exemption for all countries (FR 2026-12670 for non-mail modes).
2026-06-24	Interim final rule 91 FR 37801: de minimis suspended indefinitely for mail; postal informal entry (ET11) established for shipments ≤$2,500; formal-entry rule for PGA / Ch. 98–99 / FTA-claim shipments published with compliance delayed to 2026-10-22; Entry Type 13 test announced.
2026-09-22	Entry Type 13 voluntary test begins.
2026-10-22	Compliance date extended to 2027-01-20; Type 13 test modified so PGA data is optional.
2027-01-20	Formal entry (or Entry Type 13 where eligible) becomes mandatory for the excluded shipment categories.

What this means for cross-border sellers

The money did not change — the paperwork did. The de minimis exemption for mail remains suspended indefinitely, so every parcel still pays the normal duty stack (MFN + Section 301 + Section 232 where they hit — run your codes through the tariff calculator to see the layers). Ordinary parcels ≤$2,500 continue to clear under postal informal entry, with the tiered flat fees instead of ad-valorem MPF — the mechanics on our de minimis page are unchanged.

Treat January 20, 2027 as firm. This is the second extension of the same requirement, and the landscape is different now: the Entry Type 13 test has been live since September 22, and today's modification deliberately lowers its data burden by making electronic PGA data optional. CBP has built the on-ramp it wanted before enforcing. If your parcels fall in the excluded categories — PGA-touching goods, anything with Chapter 98/99 duties (say, goods entered under HTSUS 9903 special programs), or shipments claiming Chapter 98/FTA duty-free treatment — use the next three months to either stand up formal-entry filing through a broker or join the Type 13 test while it is still voluntary.

If none of that describes your parcels, nothing to do today. Standard low-value postal goods keep using informal entry exactly as they do now. The extension changes nothing for them on January 20, 2027 either.

Why CBP extended

The rule is candid about the operational reality: the postal channel moves enormous volumes of small parcels, and compliance depends on parties far beyond CBP — postal operators, consolidators, brokers — rebuilding their data plumbing. An October 22 deadline met with half-ready systems risked delaying ordinary Americans' parcels, which is precisely the outcome the agency wanted to avoid. Extending compliance by notice, under the APA's good-cause exception, lets the systems work continue without a cliff.

How we read it

The direction of travel has not wavered since August 2025: the duty-free $800 lane is closed, and CBP is now sequencing the process work — informal entry first, then formal entry for the sensitive categories, with a voluntary electronic alternative in parallel. Sellers who price and classify for the duty stack (not the exemption) are already compliant with the only part that touches their margins. The open question is throughput: whether postal operators' ET11 and Type 13 integrations scale before January 20. We'll keep watching the Federal Register and CBP announcements — significant moves land in our Tariff Radar within hours.