Case: an IMMEX maquiladora pays Asian suppliers and collects from its US customer

A US company that owns a Mexican plant sees one number on its consolidated balance sheet: the cash the plant consumes before the customer pays. That number is set by three payment dates, and the plant controls fewer of them than it appears.

At Soulbit Academy we present this case as an illustrative, composite example, not as a real Soulbit client. The company, its owner, the amounts, the terms and the exchange rates are author assumptions. The case ties together a cycle that other articles cover in separate pieces: the program, the tariffs and the collection.

An IMMEX maquiladora case: Pacific Assembly de Mexico and a 128 day lot (illustrative profile)

Pacific Assembly de México S. de R.L. de C.V. is a fictional maquiladora in Tijuana, Baja California, wholly owned by a US holding company in Minnesota. The Mexican entity holds the IMMEX program and SAT certification for VAT and IEPS. It assembles power modules for an industrial customer in the United States. Everything below is an author assumption, not market data or a Soulbit rate.

The model lot has three figures. The inputs, bought from a supplier in Asia, cost 800,000 dollars. The export invoice to the US customer is 1,150,000 dollars. The short-term financing cost is 8% a year. The 350,000 dollar difference covers labor, energy, logistics and margin, and stays outside the calculation.

This case does not explain the program again. The guide to the IMMEX program and exporter cash flow does that. Nor does it repeat the collection side in detail, which the case of a Mexican manufacturer collecting from a US nearshoring client covers. Here we follow a single lot from end to end.

The maquiladora's cash calendar: from the Asian advance to the US collection

The cash calendar of this lot has six dates and two cash outflows before the first inflow. Table 1 lists them counting from the purchase order, which is day 0. Every term is an author assumption.

Day (assumed)	What happens	Cash in USD (assumed)	What to watch
0	Purchase order to the Asian supplier and 25% advance	Outflow of 200,000	The supplier wants funds in hand before it produces
25	Shipment and payment of the remaining 75%	Outflow of 600,000	Most of the cash leaves 30 days before the goods arrive
55	Arrival in Mexico and temporary import under a customs entry	VAT equivalent to 128,000 USD covered by tax credit	Without certification that VAT would need a guarantee or payment
80	Production ends, goods are exported and a 1,150,000 dollar invoice is issued, net 45	None	The receivable is born and the customer's clock starts
125	Due date of the US customer's invoice	Contractual inflow of 1,150,000	This is the date on the contract, not the date cash is usable
128	Cash available through a traditional international wire	Actual inflow of 1,150,000	Three assumed business days of correspondent banking

The import VAT deserves its own reading. With certification, article 28-A of the VAT Law lets the company apply a 100% credit for the tax it would pay on importing inputs for processing or transformation under maquila or export programs. The case uses a simplified 800,000 dollar base: 16% gives a 128,000 dollar equivalent. Actual tax is calculated in pesos from customs value under the applicable rules. The law is published in Spanish.

General import duty stays outside the model. Under the IMMEX Decree, articles 14 and 15 govern when it is paid. The outcome depends on the tariff line, the origin and the applicable treaty. A real plant must add it to its cash flow, together with the customs entry and supplier payment.

The timing gap: how many days the plant finances between paying and collecting

The timing gap in this lot is 111.25 amount-weighted days: the average number of days each dollar paid to the supplier stays out of the plant's cash until the customer pays. It is computed from the date of each outflow and the date the collection is usable.

One detail comes first. For the supplier to have funds on day 0 and day 25, a traditional international wire must leave two days earlier, on day minus 2 and day 23. The case assumes those two days of transit on the outgoing side.

The arithmetic is as follows. The 200,000 dollar advance is financed from day minus 2 to day 128, which is 130 days. The 600,000 dollar balance is financed from day 23 to day 128, which is 105 days. The amount-weighted average is 111.25 days: (200,000 times 130 plus 600,000 times 105) divided by 800,000.

What does that gap cost to finance?

At the assumed 8% a year and a 360 day year, financing 800,000 dollars for 111.25 days costs 19,778 dollars per lot. That is 2.5% of the input value. To test the concept with other rates, see the cash conversion cycle and the cost of idle cash.

This cost is not a management failure. It follows from a long cycle: building to order, with a distant supplier and a customer that pays at 45 days. What the group can do is separate the segments that can be adjusted from the structural ones.

Supplier payments for an IMMEX maquiladora in stablecoin: which segments could get shorter

In the assumed scenario, stablecoin payments could shorten two segments: transit to the supplier and the wait for collection. The model assigns 2 and 3 days, respectively. Production, freight and the commercial term do not change.

The model assumes the supplier accepts USDC or USDT and receives funds on days 0 and 25 without early dispatch. It also assumes the customer pays in USDC on day 125 through a payment link and that the balance is usable that day. These are illustrative dates, not settlement times guaranteed by Soulbit; network, verification and transaction conditions matter.

With both assumptions the advance is financed for 125 days and the balance for 100. The weighted average drops to 106.25 days and the cost to 18,889 dollars. The gross difference is 889 dollars per lot, before fees and other costs. It would materialize only if the modeled dates hold.

Is that a lot or a little?

It is small next to the 19,778 dollar gap. If the 128,000 dollar VAT equivalent were paid and recovered 45 days later, its assumed financing cost would be 1,280 dollars. The payment method could shorten days but does not change the nature of the cycle.

The model also exposes another risk. Inputs and sales are in dollars, so they offset each other. Payroll and local expenses are in pesos and do not. If the peso strengthened from 18.50 to 17.575 per dollar, a 5% move, an assumed 150,000 dollar base of local costs would cost about 7,895 dollars more per lot. No payment method removes that currency risk.

IMMEX dates that also move the maquiladora's cash

A maquiladora's cash calendar includes dates that belong to no bank: how long inputs may stay in Mexico, the certification term and the annual report. Each can become an unplanned cash outflow if it is neglected.

The first is the stay period. Under article 4 of the IMMEX Decree, raw materials and components that become part of the exported goods may remain up to eighteen months. An input that arrives on day 55 and is neither transformed nor returned in time creates unbudgeted taxes.

The second is certification. The SAT's 2026 foreign trade rules set the ordinary VAT and IEPS term at one year, with renewal in the thirty days before expiry. If it expires, the plant must check whether future imports require a guarantee or VAT payment; the model's assumed dollar equivalent is 128,000 per lot.

The third is the annual report. Article 25 of the Decree requires it by the last business day of May, and failing to file suspends the benefit of temporary imports. For each obligation in detail, read the program guide linked above.

The fourth is the tariff. Since January 1, 2026 Mexico reformed 1,463 tariff lines for goods from countries without a trade agreement, according to the Ministry of Economy. The decree published in the DOF sets the rate per line. Check whether your inputs are listed and how the rate applies to your regime in Mexico's tariffs on goods from China and Asia.

The fifth is the exchange rate. The FIX published by Banco de México is a reference for dollar obligations payable in Mexico. Do not assume it is the accounting or tax rate for every collection; that depends on the date, transaction and applicable rules.

What Soulbit V1 delivers in this cycle and what stays with the plant

Soulbit V1 covers the part of the cycle that happens in dollars: paying the supplier in stablecoin, holding a balance and collecting with a link or QR. Everything else, from the customs entry to the peso conversion, stays with the company, its customs broker and its accountant. Table 2 separates the two sides.

What the plant needs	Does Soulbit V1 cover it?	How it is handled
Pay the Asian supplier in USDC or USDT	Yes, if the supplier accepts it	Stablecoin payment from balances in institutional MPC custody
Hold a balance in USDC, USDT or USD, EUR and GBP fiat	Yes	Client balances, after KYB verification
Collect the invoice from the US customer	Yes, if the customer can pay this way	Customer pays by payment link or QR if stablecoin is accepted
Convert between currencies at a quote	Yes, on request	eOTC conversion by quote, with no order book
Move the collection into Mexican pesos or pay through SPEI	No	Soulbit's only local banking rail is Colombia; the plant uses its bank or exchange house
Customs entries, IMMEX certification, VAT and tax invoices	No	Customs broker, accountant and the competent authorities

Two conditions limit the case. The first is that the Asian supplier accepts stablecoin, which cannot be assumed and needs a written agreement. The second is that the US customer can pay through a link, which the payables processes of large corporations do not always allow.

For a foreign investor there is one more point. The IMMEX program belongs to the Mexican legal entity, so the supplier relationship, the customs entries and the collection are all booked there. How the parent funds the subsidiary is a separate decision, outside the scope of this case.

Soulbit is not a customs broker or a tax adviser. It does not decide the customs treatment of the lot, calculate taxes or issue invoices. The model excludes payment and conversion fees, so it does not calculate a net price advantage.