How to

How to handle merch leftovers after an event

An operations playbook for event coordinators, marketing teams and logistics in Mexico on what to do with the boxes of shirts, backpacks, notebooks, bottles and gadgets left after a trade show, congress, activation or internal event. When to reassign, when to donate, when to sell and when to recycle, without losing brand value and without leaving money in storage.

The 8-step flow Templates and references

Why leftovers cost money even when they do not move

Every event ends with leftovers. Almost always. The question is not whether merch will be left over, but what is done with it. Undecided leftovers are a sunk cost that degrades over time and erodes the financial result of the program. A shirt that cost MXN 180 to produce and sits in storage for twelve months costs, at the end of the year, MXN 230 between storage, degradation and opportunity cost. If the same shirt is donated with fiscal value to an authorised donee, its net cost drops to MXN 60 thanks to the 7 % of fiscal-utility tax benefit.

The standard mistake is to leave leftovers in storage "in case they are used in the next event". Most of the time they are not: the next event has its own shirt, its own colour, its own legend. What is not decided within the first 30 days after the event becomes a permanent problem for the warehouse area.

The other common mistake is to give away leftovers without rhyme or reason: to staff who did not participate, to the next brigade of the company, to the personal event of the director. Giving away without logic erodes the value of the merch for future events: when attendees discover that the event shirt is being handed out two months later somewhere else, the perception of exclusivity drops and the price of the next program weakens.

The financially intelligent exit is to treat leftovers with the same discipline as any inventory asset: classification, valuation, exit decision within the first 30 days, accounting record. The decision has five possible paths — internal reassignment, deductible donation, controlled secondary sale, responsible recycling and traceable destruction — and the combination depends on the type of piece, condition, elapsed time and brand restrictions.

The relevant legal framework in Mexico for donation is the Ley del Impuesto sobre la Renta in its articles 27 and 31, and the SAT directory of authorised donees. For responsible destruction, the applicable NOM are NOM-141 on textiles and NOM-161 on waste handling. For secondary sale, the fiscal regime applicable to transfer pricing and market value.

The 8-step flow for handling event leftovers

  1. Physical inventory at the close of the event. Before the warehouse fills with boxes, count. Separate by SKU, by condition (sealed, unopened, in original packaging, without packaging, damaged) and by validity (season, event, year). A leftover of shirts with 2024 printed on them does not reassign to the 2026 event.
  2. Decision per SKU within the first 30 days. For each leftover SKU, one of five paths: internal reassignment, deductible donation, secondary sale, responsible recycling, traceable destruction. The decision is documented and signed by the logistics responsible and the fiscal area.
  3. Internal reassignment first. Check whether other areas of the company can use the pieces: HR for onboarding, sales for key accounts, the CSR program for brigades, the next smaller-scale event. Internal reassignment recovers value without affecting the secondary market.
  4. Deductible donation as the second path. For valid, seasonless pieces in original packaging and useful for a community program. The donation is made to an organisation authorised by SAT to receive deductible donations. It is formalised with a contract, a delivery record with detailed description and a CFDI of type "Donativo" with the donee complement.
  5. Controlled secondary sale as the third path. Only for generic pieces without season, without dominant logo and with residual value. Sales channel to employees with invoice, internal second-hand platform or secondary market with minimum price. What is avoided is the piece appearing on open marketplaces at cost price, because that day value is lost twice: the brand and the price.
  6. Responsible recycling as the fourth path. For damaged, expired pieces or with materials that should not go to landfill. Textile goes to an authorised recycler, plastic to collection, metals sold as scrap with invoice. The recycler issues a final disposal certificate.
  7. Traceable destruction as the last path. Only for pieces that must not reach the market under the brand for legal, regulatory or image reasons. Destruction is performed by an authorised provider, in the presence of a witness, with notarised record and certificate of incineration or shredding. Traceability is what protects the brand.
  8. Accounting close and reporting. Every leftover movement is recorded with its CFDI, record or invoice. The fiscal area determines whether the donation generates a deduction, whether the sale generates taxable income, whether the destruction generates a deductible loss. The report is archived for audit and used as input for the forecast of the next event.

Common mistakes that multiply the cost of leftovers

The first mistake is not taking inventory at the close. Without a count there is no possible decision; the leftovers stay in storage and become a permanent problem for the warehouse.

The second mistake is deciding by intuition. "Let's give it away at the director's event" or "we'll give it to the staff's children" are decisions that erode the value of the program. The decision is based on written criteria: condition, validity, brand value, available path.

The third mistake is donating without an authorised donee. Donating to an organisation without SAT authorisation does not generate a deduction; the fiscal benefit is lost and the accounting operation remains weak.

The fourth mistake is selling on open marketplaces without price control. The MXN 180 event shirt appearing on Mercado Libre at MXN 60 a month later is involuntary negative advertising. Secondary sale happens through a controlled channel with a minimum price.

The fifth mistake is destroying without traceability. Destruction without notarised record, without authorised provider and without final disposal certificate leaves the door open for the destroyed pieces to reappear on another channel. The brand remains exposed.

The sixth mistake is forgetting depreciation. A piece that sits in storage for a year is worth less than one fresh out of the event. The decision is based on present value, not original cost.

Templates, references and tools

Leftover inventory record: table with SKU, quantity, condition, production date, assigned path, target movement date. Prepared by logistics within the first 14 days after the event.

Decision matrix per SKU: table with criteria: minimum required condition, season validity, residual brand value, legal restrictions, estimated fiscal value, recommended path. Helps decide without improvising.

Donation agreement template: agreement with the authorised donee, detailed description of the goods, unit value, quantity, delivery date, CFDI to issue with the donee complement. Fiscal area review before signing.

Secondary sale policy: document with authorised channels (sale to employees with invoice, internal platform, secondary market with minimum price), minimum price per SKU and brand restrictions. Set by commercial and approved by management.

Legal and operational references: articles 27 and 31 of the LISR on deductible donations, the SAT directory of authorised donees, NOM-141 on textile waste recovery, NOM-161 on solid waste handling, and the master agreement with the destruction provider with notarised record.