Run a five-question trade-shock stress test before a raise or expansion

You are about to price a raise or expansion, and a trade dispute can move a cross-border P&L faster than a pricing change. Treat tariff risk as a scenario input, not a headline. The test below fits a founder planning session, not a compliance audit. Run it before the deck is final.

These questions separate a model from a hope

Run each quickly. If you cannot answer it, you do not have a model; you have a hope.

• Revenue exposure: Can you tag every revenue line by origin, destination, and customer contract, and name the affected lines if a duty changes?
• Tariff delta: Can you calculate the gross-margin impact of a duty change on your highest-volume products before you ask finance for a spreadsheet?
• Counter-tariff risk: Can you identify which of your suppliers, customers, or distribution partners would face retaliatory duties if your home market responds?
• Contract and customer language: Can you state which agreements let you pass through a cost increase without renegotiation, and which ones lock you into absorbing it?
• Capital-market narrative: Can you explain to an investor how a trade dispute changes unit economics, not just the story you tell in the deck?

The first two questions test whether the model can show the number; the last two test whether the shock can be passed through or explained. A duty that hits a low-margin line can erase the raise thesis, and a clean P&L can still fail if the story sounds like it was written before the shock.

The legal edge can move before your raise closes

Tariff policy can change when a legal basis expires and another takes its place. The 10 percent Section 122 tariffs ended on Friday, July 24, and the administration replaced them with Section 301 forced-labor tariffs covering 60 economies.

Origin matters. A 25 percent Section 301 duty began on July 22 for certain Brazilian goods. Stacking can be unclear. USTR, the U.S. trade office, did not clarify whether the new 12.5 percent forced-labor Section 301 duty stacks with existing Chinese-origin Section 301 tariffs of 7.5 percent for some products or 25 percent for others. That ambiguity belongs in the model.

Courts can move the line too. A 6-3 U.S. A 6-3 U.S. Supreme Court ruling found that President Trump could not use IEEPA to levy sweeping worldwide tariffs without congressional consent. A May 7, 2026 Court of International Trade decision invalidated Proclamation 11012 and its Section 122 tariffs, and the government appealed. Reversals are not instant cash. CBP, U.S. customs, expects electronic refunds generally within 60-90 days after an accepted CAPE Declaration, a customs refund filing.

Reversals and stacking change the base case. If a tariff is invalidated, the revenue model may improve, but the refund may arrive after the quarter. If a new duty stacks, the margin model may worsen before the customer sees a price change.

Put the shock in the model before the deck

The U.S.-Canada episode is a useful template: after failed summer negotiations, Canada and the U.S. missed a final trade agreement, and President Trump's 50 percent tariff package hit roughly $20 billion of Canadian goods, while Canada announced matching counter-tariffs covering nearly $28 billion of U.S. goods, with Carney saying they would begin on September 8, making counter-tariffs a concrete scenario input.

U.S. Commerce Secretary Howard Lutnick rejected the idea that French-language laws were the sticking point and said Canada abandoned a U.S. trade deal late last month for political reasons. Carney said U.S. officials' current statements differ from the red lines they presented during negotiations. He said Canada would resume trade talks only after the U.S. side stopped mocking and became serious, and that the Liberal Party's victory in three by-elections on Monday showed support for Ottawa's trade and economic plans.

The parties can disagree about why a final agreement slipped, and that disagreement is part of the risk. A founder should not need to resolve the dispute. The founder needs to know which line in the model moves if the dispute hardens, softens, or reverses. Use those facts as scenario inputs, not as predictions. If a duty can rise, fall, stack, or be refunded late, the model should show the cash-flow effect. Keep the stress test in the board pack, not just the appendix.

This article is general information, not investment or legal advice.