Tariff volatility is exposing gaps in how finance teams assess cost risk

Pressure from tariffs is now showing up across global trade and corporate margins, with recent forecasts pointing to a weaker operating environment rather than a temporary disruption. Wenzel Reyes, senior director – methodology and audit solutions at MindBridge, writes

The World Trade Organization has cut its forecast for global trade growth in 2026 to 0.5%, down from 1.8%, reflecting slower demand and the cumulative effect of tariff changes that have unsettled pricing and supply chains over the past year.

For finance teams, that downgrade matters less as a macro signal than as an indication that cost pressure is likely to persist rather than unwind.

Evidence from company data suggests much of that pressure has yet to surface fully in reported prices or earnings. Research from Harvard Business School indicates that only around one-fifth of recent tariff costs have reached retail shelves, with the remainder still being absorbed by manufacturers and wholesalers, while KPMG reports that 57% of businesses are already experiencing declining gross margins as a direct result of recent trade shifts. In accounting terms, a large share of the impact is sitting inside cost structures and working capital rather than appearing in headline results.

Month-end remains the organising principle for much finance work. Costs are reviewed once the period closes, movements are reconciled and variances are investigated if they appear large enough. That structure works when change is slow.

Tariff-driven cost does not move that way. It tends to arrive in fragments, such as amended duty rates on invoices, supplier surcharges absorbed into pricing, or inventory journals posted to correct earlier assumptions. None of these attracts much attention on its own but, over time, they accumulate.

Sampling makes this harder to spot. Audit and control activity still relies heavily on subsets of transactions and materiality thresholds. Tariff effects often sit below those thresholds, particularly where changes affect broad product ranges or multiple suppliers. From a procedural standpoint, controls may appear to be working. From a commercial standpoint, cost pressure is already moving through inventory and into margin.

Control design plays a part. Approval limits and variance benchmarks are usually set during periods of relative stability and revisited infrequently. When tariff changes arrive quickly, or apply unevenly across suppliers and routes, those settings stop reflecting how the business is trading. Controls continue to operate, but they no longer highlight where risk is building.

Systems introduce further delay. Tariff changes often move faster than ERP updates, particularly in organisations with complex catalogues or multi-country supply chains. Invoices arrive with revised rates applied and have to be processed. Updating rate tables, validating classifications and adjusting landed cost logic comes later. The exposure exists regardless of whether the system has caught up.

When timing starts to matter commercially

This lag does more than complicate reporting. Pricing teams may still be working from last month’s assumptions, while procurement discussions drift out of sync with what suppliers are already charging. Inventory decisions also become harder to interpret when stock is bought under one tariff regime and sold under another.

Governance feels the strain as well. Boards and audit committees are accustomed to reviewing risk through periodic reporting, control testing and sampled assurance. Those tools still matter, but they are not well suited to fast-moving trade conditions. The problem is not a lack of information, but the delay in getting it.

In that context, full-population analysis has become more relevant. When risk is spread across volume rather than concentrated in a small number of transactions, sampling offers limited protection. Reviewing the entire transaction set allows finance teams to see where cost behaviour is changing and whether those changes are isolated or spreading.

Earlier visibility, different conversations

Looking across all transactions in payables, inventory and the general ledger changes the nature of review. The question is no longer whether a sample is representative. It becomes where tariff effects are first appearing, which suppliers or routes are driving them, and which products are affected ahead of others. One supplier may absorb cost temporarily, another may reprice immediately, while a third introduces additional charges that sit outside headline duty lines.

 Aggregated reporting tends to flatten that detail into a single variance, which may be useful for explanation but is limited as a decision tool. Approaches that track anomalies across full data sets are better suited to these conditions. Thresholds based on historic behaviour struggle when tariffs, suppliers and logistics are all shifting at the same time. Methods that adjust as patterns change make it easier to focus attention where it is needed, without generating unnecessary noise.

For controllers, the change is mainly one of sequencing. The close still anchors the period, but analysis does not have to wait for it.

Tariff-related cost movement can be identified as it enters the ledger, reducing the amount of reconstruction required later and making it easier to separate tariff effects from routine operational movement.

For CFOs, the impact is felt in decision-making. Pricing, sourcing and supplier discussions can draw on what is already visible in transaction data rather than conclusions formed after the period ends. Finance input moves earlier, becoming part of the response to cost pressure rather than the explanation that follows.

Looking ahead, trade conditions are unlikely to settle. Tariffs will continue to move, sometimes abruptly. Finance teams cannot control that, but they can shorten the gap between impact and visibility. In volatile conditions, that gap often determines whether cost risk is managed in time or simply recorded after the fact.