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A "cheap broker" quote is almost never cheap. It is a brokerage fee printed in bold at the top, followed by a footnote that reads "additional fees apply" — and that footnote is where the margin disappears.
We've cleared 190,000+ operations a year across 39+ ports between Mexico and the United States since 1904, and we have audited the cost stacks of hundreds of companies switching brokers. The pattern is identical: the brokerage fee is rarely the biggest line item, and the line items that hurt the most are the ones the CFO never asked about because the broker never put them on the same page.
This is the working breakdown of what actually shows up on a Mexican import operation. Nine line items. Each one, when missed, typically costs 1-3% of margin per shipment. Multiply that by twenty shipments a month and the math stops being academic.
The "Cheap Broker" Trick — Why Quote Comparisons Lie
Brokerage in Mexico is a regulated, low-margin business. A patente-holding agent (or a forwarder reselling a patente) competes hard on the one line item that is easy to compare. That line item is the brokerage fee — often 0.15% to 0.45% of customs value. So the quote you receive arrives with a bolded brokerage fee, and everything else is bundled under "duties and taxes (estimated)" or omitted entirely.
What you do not see on a typical comparative quote:
→ Whether the broker has priced demurrage exposure into the lane.
→ Whether the IGI rate quoted uses the country-of-origin rate that actually applies to your goods in 2026.
→ Whether the IEPS applies to your category at all.
→ Whether bonded warehousing fees are included or billed downstream.
→ Whether the pre-clearance and advisory work happens before the truck moves, or only after a hold.
When the CFO sees two quotes side-by-side — one at $850 brokerage and one at $1,200 — and picks the $850, they have not saved $350. They have postponed a number they will see later, often as a back-charge or a held shipment, and almost always larger.
At Joffroy, we publish line-item breakdowns transparently across all four business units — MX Customs, US Customs, Global Freight, Warehousing. The reason is simple: a CFO can only optimize what they can see. The rest is hope.
Line Item 1: Customs Tariff (IGI) — The One That Changed in 2026
The Impuesto General de Importación (IGI) is the duty applied to the customs value of imported goods, set by Mexico's TIGIE (Tarifa de la Ley de los Impuestos Generales de Importación y Exportación).
In 2026, this is no longer a line you can estimate from last year's number. A presidential decree published in the Diario Oficial de la Federación (DOF, Mexico's federal gazette) on December 29, 2025 increased tariff rates on 1,463 tariff items, with average increases of 35% and peaks at 50%. The reform targets imports from countries with no FTA with Mexico — primarily China and other Asian origins — across automotive parts, textiles, plastics, steel, home appliances, aluminum, toys, and footwear.
If your broker quoted a 2025 IGI rate, your duty bill is already wrong. If your supplier is in a non-FTA country and you import a fraction included in the 1,463 reformed lines, your landed cost on that SKU may have jumped 20% to 40% on January 1, 2026.
The fix is mechanical, not strategic: pull every tariff fraction in your import portfolio against the 2026 TIGIE before signing your next purchase order. Joffroy's free simulator at tariff.joffroy.com covers all 8,134 LIGIE fractions across 55 countries and 14 trade agreements.
Line Item 2: IVA — Calculated on a Base That Compounds
Value-added tax on imports is 16%, unchanged for 2026 per articles 1 and 27 of the Ley del IVA. The misunderstanding is not the rate. The misunderstanding is the base.
IVA is calculated on the sum of customs value + IGI + DTA + countervailing duties + IEPS. It is the last line in a cascade, and that cascade compounds. A 16% IVA on a customs value of $100,000 is not $16,000 — because by the time IVA is applied, the base has been inflated by every line item above it.
A worked example. Customs value $100,000. IGI at 20% adds $20,000. DTA at 0.8% adds $800. The IVA base is now $120,800. The IVA itself is $19,328 — not $16,000.
CFOs who model landed cost as a flat percentage of FOB are off by 2-5% on every shipment. Multiply across an annual import program and the modeling error alone justifies a re-build of the landed cost workbook.
Line Item 3: DTA — The Customs Processing Fee That Is Usually a Flat Number, Until It Isn't
The Derecho de Trámite Aduanero (DTA, the customs processing fee) is governed by Article 49 of the Ley Federal de Derechos. The general rate is 8 per thousand of customs value — that is 0.8% — for definitive imports.
What most quotes hide:
→ Temporary imports under IMMEX pay a fixed DTA per pedimento (approximately MXN $362 in current rates), not 0.8% of value. This is a major optimization lever for maquiladoras.
→ AEO-certified (OEA) IMMEX operations are exempt from ad valorem DTA entirely on qualifying operations.
→ Originating goods under USMCA that qualify for preferential treatment may also receive DTA exemptions.
If your broker is quoting 0.8% DTA on temporary imports for an IMMEX operation, that line deserves a closer look. The fix is findable in a 30-minute audit of the pedimento against the actual SAT payment — confirming the rate charged matches the rate the operation legally owes.
Line Item 4: IEPS — The Tax That Doesn't Apply Until It Does
The Impuesto Especial sobre Producción y Servicios (IEPS, the special tax on production and services) applies to specific categories only — but when it applies, it is large.
→ Beer, wine, spirits: 26.5%, 30%, or 53% depending on alcohol content.
→ Tobacco: 200% plus quota.
→ Sweetened flavored beverages: MXN $1.6451 per liter.
→ Energy drinks: 25% plus quota.
→ Junk food: 8%.
→ Pesticides: 6-9% by toxicological category.
→ Video games rated not suitable for minors (new in 2026): 8%.
The 2026 reform expanded IEPS coverage and rates across multiple categories. If you import any of the above and your quote did not separately line-item IEPS, your landed cost is dramatically understated. And like IVA, IEPS sits inside the cascade — so missing it understates the entire bottom line, not just the IEPS line.
Line Item 5: The Brokerage Fee — Visible, Compared, Almost Always the Smallest
The brokerage fee — the comisión del agente aduanal — is the line item every broker prints first because it is the one the CFO compares first. On a customs value of $100,000, the brokerage fee will typically land between $200 and $800.
Compare that to the IGI ($20,000+), the IVA ($19,000+), the DTA ($800), and whatever IEPS applies, and the brokerage fee is rounding error. We say this against our own line item: optimizing the brokerage fee while ignoring the other eight is a CFO error.
The right comparison is not "whose brokerage fee is cheapest." The right comparison is "whose total quoted landed cost matches the actual pedimento, line by line, when the goods clear." That comparison requires every line to be published up front.
Mid-blog CTA: Want to validate your current broker's quoted IGI against the 2026 TIGIE before your next purchase order? Run any tariff fraction at tariff.joffroy.com — 8,134 LIGIE fractions, 55 countries, free basic simulations. A licensed customs agent reviews any full simulation within 24 hours.
Line Item 6: Demurrage and Storage at Port — The Cost That Accumulates Hourly
Demurrage is what the shipping line charges when a container sits at the port past its free time. Detention is what the line charges when a container sits outside the port past its free time. Both compound by the day.
Industry-wide, demurrage rates run from $75 to $300 per day for a 20-foot container, roughly double for a 40-foot, and the escalation tiers steepen after day 7 and day 14.
A held shipment at Manzanillo costs you twice: the demurrage clock, and the downstream cost of whatever stopped because the cargo didn't move. The demurrage clock is the visible one. The stopped production line is the invisible one — and the invisible one is always larger.
The defensive posture: pre-clearance. Customs documentation submitted 48-72 hours before vessel arrival or truck departure means classification errors get caught when they cost zero to fix, not when they cost $200 a day plus a stopped plant.
Line Item 7: Inland Transportation, Mexican Side
Once cargo clears Mexican customs, it has to move to its destination. The MX-side inland leg — port to plant, border to warehouse, customs office to bonded facility — is rarely included in a brokerage quote.
The variables that matter: distance, vehicle type (dry van, flatbed, refrigerated), fuel surcharge, security escort if the route requires it (Veracruz-Mexico City and Manzanillo-Bajío corridors both have insurance-driven escort requirements for high-value goods), tolls, and detention if the receiving plant is slow to unload.
A quote that says "$X all-in to your dock" is either incomplete or is absorbing the inland leg into a margin that will resurface when volumes change. A quote that prints inland transport as its own line is one you can manage.
Line Item 8: Inland Transportation, US Side
The same logic applies on the US side — and for any company running a binational supply chain, both sides count. Laredo to San Antonio is a different cost than Otay Mesa to Los Angeles. Cross-dock charges at the border, drayage from the bridge to the cross-dock, line-haul from cross-dock to final consignee — three distinct cost categories often bundled into one.
We operate both sides of the border with our own US Corporate Customs Brokerage License and three Mexican Patentes Nacionales in Monterrey, Nogales, and Manzanillo. The reason that matters for landed cost: when the same operation runs both legs, the cross-dock handoff is one line item, not two with markup on each. When the MX broker, US broker, and trucker are three separate vendors, the handoffs accumulate fees that no single quote ever reveals.
Line Item 9: Bonded Warehouse Fees and Pre-Clearance — The "Invisible" Work
Two related line items that almost never appear on a comparison quote.
Bonded warehouse fees. For IMMEX operations, pre-clearance staging, or duty deferral, cargo sits in a bonded facility before formal entry. Charges include storage by day, handling per pallet, in/out movements, inventory reconciliation, and any special handling (refrigeration, hazmat, security). These accumulate fast on cargo that sits, and they are routine charges — not exception charges.
Pre-clearance and advisory time. The most undervalued line item in customs. This is the work that happens before the truck or vessel moves: tariff classification verification, document review, IMMEX eligibility check, certificate-of-origin validation, IEPS applicability check, country-of-origin substantiation against the 2026 reformed fractions, and OEA/CTPAT documentation confirmation.
A price-only model quotes zero hours of pre-clearance and bills the work as "exception management" after a hold occurs. A service model prices pre-clearance into the engagement, because the pre-clearance is what prevents the hold.
Pre-clearance is the highest-leverage line item on this list. Skip it to save $200, pay $20,000 to fix the consequence.
How to Build an Apples-to-Apples Comparison
Three steps a CFO can take this week.
Step one — demand all nine lines. Request that every broker quote line out: brokerage fee, IGI (with 2026 TIGIE confirmation), IVA, DTA, IEPS (if applicable), demurrage exposure assumption, MX inland, US inland, bonded warehouse, and pre-clearance hours. The completeness of that breakdown is itself a signal.
Step two — audit one historical shipment. Pull a pedimento from the last 60 days. Match every line on the pedimento to every line on the original quote. The variance is the hidden cost of your current arrangement.
Step three — model the cascade. Build the IVA base correctly: customs value + IGI + DTA + countervailing duties + IEPS, then 16% on that sum. If your current workbook flats 16% on customs value, you are under-modeling landed cost by 2-5% on every shipment.
What a Transparent Landed Cost Looks Like at Joffroy
We publish all nine line items on every quote, every operation, every client — no exceptions. 99.8% accuracy across 190,000+ annual operations is not a marketing line; it is what makes line-item transparency possible. If the pedimento matches the quote, the CFO can plan. If it doesn't, the CFO is auditing surprises instead of running the business.
This is what we mean by TRADE. UNDER CONTROL. Cost transparency is not a perk. It is the entry-level requirement of a customs partner who treats your cargo as if it were our own.
End CTA: Comparing brokers, switching corridors, or pricing a new product into your import program? Talk to a Joffroy expert — we will run a free landed cost benchmark against your current line-item breakdown, using the 2026 TIGIE and the actual cascade math. You will get a side-by-side that your CFO can take to the board.
TRADE. UNDER CONTROL.
