The Mamora blog

Notes from the
FTZ floor.

Written by the trade compliance veterans, ex-CBP officers, and engineers who build Mamora. Real problems, real numbers, no SEO mush.

Playbook

The 20-minute reprice: how to handle a new Section 301 tariff in one afternoon.

USTR drops a new tariff list on a Tuesday afternoon. Most trade compliance teams spend the next week catching up. The customers running on Mamora spend twenty minutes. Here's the playbook, and the math behind why the spreadsheet version of this work is dead.

Operations

Why FTZ reconciliation takes 10 days (and how we cut it to 4 hours).

The math of the quarterly ERP-to-FTZ reconciliation, why the typical zone burns two engineer-weeks per quarter on it, and the architecture choice that turned it into an afternoon.

Economics

The hidden cost of manual weekly entry filings.

If you file 52 weekly entries a year by hand, the cost isn't the broker fee. It's the four times a year you miss a duty rate change. We did the math on a real $180M importer.

Compliance

What HTS classification audits actually look for.

Twelve years at CBP teaches you the shape of a clean audit and the shape of a bad one. Here's what auditors actually check, in the order they check it, and how to be the boring file on the desk.

Strategy

Tariff engineering 101: when First Sale actually works.

First Sale gets pitched as a free 15% savings. In practice, it works in about a third of the situations people try to apply it. Here are the three conditions that have to be true, and a flowchart we use with customers.

Strategy

FTZ vs. bonded warehouse: when each one wins.

The choice between an FTZ and a bonded warehouse isn't ideological. It's a function of your tariff profile, your re-export ratio, and how comfortable you are with weekly filings. A side-by-side, with the math.

Operations

Most FTZs file 7501s blind. Here's why that's expensive.

If your weekly estimated entries don't validate against ACE before submission, you're paying for it in CF-28 responses and recap adjustments. We pulled the data on 84 customer zones to quantify the gap.

The Mamora Brief

Tariff news, regulatory updates, and the occasional rant.

Every other Friday. Written by our trade policy team. No referral links, no "10 ways" listicles. About 700 words.

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