Tariff shifts hit the front lines first, long before ERP rules adjust, and that mismatch triggers early buys, overrides, and inventory drift. If it goes unseen, capital gets trapped for an entire quarter. This piece breaks down the early warning signs any distributor can spot in under an hour.

Quick Checklist: Spotting Tariff-Driven Working Capital Risk

Run these four checks. Often, 10-15% of SKUs show pressure each quarter.

1.      Identify SKUs exposed to tariffs:

Create a simple list of items most likely to react to policy changes. Use:

• country of origin
• recent supplier cost increases
• tariff-sensitive materials or components
• freight changes or new surcharges

This is your early risk list.

2.     Flag SKUs with rising lead-time variance

Look for early instability:

• jumps abruptly versus expected lead time
• repeated new pattern of late receipts
• branch-level min and max overrides

Variance often signals rising inventory.

3.     Compare demand against inbound purchasing

Zero in on SKUs where:

• PO quantities increased faster than demand
• emergency buys climbed
• turns fell below branch or category norms

This “buy early to be safe” pattern is common and costly.

4.    Overlay pricing behavior on the same SKUs

Check for:

• elevated override rates
• discounts issued during rising cost periods
• matrix exceptions tied to tariff-affected groups

Tariffs, volatility, and overrides together create one of the fastest paths to trapped capital.

Once the scan highlights where exposure is building, the sections below explain why these patterns appear and how to stay ahead of them without hurting service levels.

The Four Places Capital Gets Trapped After a Tariff Shift

Every inventory manager has seen it: Organizational reactions, not tariffs, trap capital in four areas.

1.      Lead-time volatility

Small delays or routing changes can raise reorder points and inventory levels. Even a 2-day lead time increase adds inventory days. Measuring “buffer creep” gets executive attention.

2.     Shifts in substitutes

Tariffs raise prices, prompting customers to switch, but replenishment lags. Slow substitutes pile up; fast movers run short. Tracking “switch rates” spots issues early.

3.     Early purchasing

Branches often add safety stock across the board when tariffs hit, but not every item can absorb that behavior. High-volume SKUs can handle a temporary buffer. Mid-velocity and slow movers cannot. When those items are bought “just to be safe,” they turn into dead inventory quickly and tie up capital long before the numbers show it.

4.    Margin dilution on tariff-sensitive items

Override frequency rises during volatility, leading to underpriced stocks and faster margin losses.

These problems grow before finance notices.

Pricing and Override Behavior That Intensifies Loss

In tariff cycles, these behaviors appear:

• sales teams discount to avoid uncomfortable conversations
• quotes rely on incomplete or outdated cost data
• managers approve legacy exceptions to protect relationships
• matrices lag behind supplier changes

A Simple Fix to Prevent Inventory Drift

Replenishment systems assume stable lead times (LT), but tariffs disrupt them. One adjustment prevents drift.

Adjusted LT = Avg. LT + (LT Standard Deviation × Volatility Factor)

Use a volatility factor of:

• 0 for mild instability
• 5 for moderate
• 0 or more for high uncertainty

Use the adjusted value for reorder points and safety stock. Early adopters avoid inventory spikes.

How to Cut Exposure Without Hurting Sales

Top performers use these habits to prevent volatility from becoming long-term capital drag:

1. Give sales clear visibility into tariff-impacted items before they quote.
2. Update matrices and pricing rules early rather than reacting after complaints appear.
3. Tighten inventory only in slow or substitutable categories to avoid service issues.
4. Review min and max weekly for 60 to 90 days after major policy shifts.
5. Track override patterns with the same rigor applied to cost updates.

These habits prevent reactions that trap capital.

Conclusion

Tariffs disrupt, but the real risk is structural. Successful teams spot exposure early, adjust lead-time assumptions quickly, and monitor pricing closely.

A focused one-hour review of core ERP signals can surface where capital is starting to get stuck long before it becomes a larger problem.