Section 338 Tariffs: What They Mean for Canadian Home-Based Businesses

Understanding what is changing, who may be affected, and how small business owners can make decisions in an uncertain trade environment.

By L.Kenway BComm CPB Retired
This is the year you get all your ducks in a row! Start by starting ... and keep it simple. Consistency beats perfection.

Published July 25, 2026 | Edited July 27, 2026

BACK TO >> What’s Happening: Canada’s Trade Shifts
RELATED >> Why Canada Is Changing Its Trade Strategy | Canada-U.S. Tariff Timeline

Bilingual "Welcome to Canada" sign at a Canada-U.S. border crossing

Canada's trade relationship with the U.S. is being renegotiated in real time.

The new U.S. tariffs announced in July 2026 under Section 338 sound dramatic ... and for some Canadian exporters, they are. But for many home-based businesses and solopreneurs, the direct impact may be much narrower than the headlines suggest. And for the minority who are affected, it may be more serious than 'narrower' implies.

Business Intelligence is not about predicting politics or taking sides. It is about understanding the forces that shape the environment in which your business operates. Trade rules, regulations, interest rates, and government decisions can affect costs, customers, suppliers, and opportunities ... even for very small businesses.

At A Glance

Effective: August 19, 2026
Additional tariff: 50%
CUSMA exemption does not apply
Most home businesses are not directly affected
Businesses buying U.S. supplies or selling to an exporter may face indirect cost pressure
Businesses exporting listed goods should review their HTS (Harmonized Tariff Schedule) classifications

This explainer looks at the new Section 338 tariffs through the Business Intelligence lens, organized around one question: which of three situations describes you?

What Happened

A Depression-era tariff law was used for the first time, and it skips a step Canadian exporters have relied on for a year and a half.

On July 20, 2026, President Trump signed three proclamations invoking Section 338 of the Tariff Act of 1930 ... a statute that has never before been used to impose tariffs.

Each proclamation targets a separate Canadian policy the administration calls discriminatory:

provincial restrictions on U.S. alcohol sales,
Canada's administration of dairy quota rules, and
a surtax on U.S.-made vehicles.

The remedy is the same in each case: an additional 50% duty. These duties are added on top of existing tariffs, like the MFN-most favoured nation rates, rather than replacing them. The exception is Section 232 tariffs and the goods named in the proclamation's exclusions ... those don't stack with Section 338 tariffs.

The duties take effect on goods entering the United States on or after August 19, 2026. That's the customs entry date ... not when goods were ordered, shipped, or already sitting in a warehouse. There's no general exception for goods already in transit.

What Makes This Tariff Different?

No CUSMA carve-out, a broader product list than the headlines suggest, and no expiry date.

Two things make this action structurally different from tariffs Canadian exporters have faced over the past year and a half.

No CUSMA carve-out. Every earlier round of U.S. tariffs excluded CUSMA-compliant goods. Section 338 ignores that distinction entirely. A valid certificate of origin does nothing to protect a covered product this time.
No built-in expiry. Unlike the emergency tariff powers the U.S. Supreme Court narrowed earlier this year, or Section 122's 150-day cap, these duties stay in place indefinitely unless the President modifies or revokes them by a new proclamation. The statute explicitly gives him that power to escalate, up to and including a full import ban if Canada is found to be "increasing" its discrimination.

It's also worth noting:

Who this list actually targets. Past rounds leaned toward large-scale industrial categories. This one skews toward small-batch and craft-adjacent goods (small medium enterprises - SMEs) ... hockey sticks, plywood, furniture, fishing rods, seeds, swimming pools.
The named categories are only the tip of the list. Reporting initially focused on the named categories of alcohol, dairy, and automobiles. The actual Annex II lists are much broader, as noted above. The U.S. Trade Representative puts total exposure at roughly $20 billion USD ($28 billion CAD), about 5% of Canada's goods exports to the U.S.
Excluded from this particular action are energy, potash, critical minerals, fish, and goods already under Section 232 tariffs like steel, aluminum, copper, autos, etc..

Should I Care? Find Your Situation

Let's look at what this means for you. Most readers fall into one of three groups. Find yours before reading further.

Not buying or selling anything on the covered lists? You're likely fine, but the pattern below is still worth knowing.

If you sell only within Canada, or you sell digital services, direct impact is unlikely. That said, this round is unusually concentrated on SME-scale goods rather than big industrial categories. It's worth a second glance if your work touches anything craft-adjacent, even indirectly.

Buying U.S. supplies, or selling to a Canadian business that exports to the U.S.? Watch costs, don't panic.

You won't appear on any tariff list, but two indirect paths could still reach you. If Canada retaliates with its own tariffs, the U.S. supplies you buy could get more expensive. And if your clients are in an exposed sector, they may tighten spending or delay payment while they sort out their own exposure.

Exporting covered goods to the U.S.? This changes your math, not just your costs.

At 50%, this isn't a cost increase most small exporters can price through. For many, it may mean the U.S. market is no longer viable at current pricing, not just more expensive. Three things matter here:

CUSMA no longer protects you. If your product is on the covered list, a valid certificate of origin offers no shield against this action, unlike every prior round of tariffs.
Check your actual exposure. The list is long and specific enough that home-based exporters (Etsy sellers, small manufacturers, crafters shipping wine accessories or furniture components) may be on it without warning. Take 20 minutes to check your HTS (Harmonized Tariff Schedule) classifications against Chapter 99 of the proclamation annexes rather than relying on summaries that just say "cars, alcohol, and dairy".
Your industry matters. Wood and wood products; electrical machinery and equipment; plastics and rubber products; furniture, bedding and lighting. Exempt sectors are energy, potash, fish, and critical minerals.
Where you're located matters. British Columbia is the most exposed province so far, with covered goods representing roughly 13–14% of its U.S.-bound exports (the highest in the country) largely due to value-added wood, pulp, paper, and packaging products on the list as well as their wine industry. Ontario and Quebec carry different exposure tied to autos and dairy-adjacent goods. Alberta and Saskatchewan both have minimal impact.

If the U.S. market becomes unworkable at these rates, this is where slow-moving progress on internal free trade within Canada becomes worth watching. A possible, if not immediate, way to redirect toward domestic markets instead of U.S. ones.

What to Watch Next

A negotiating window, a slow legal fight, possible retaliation, and gaps in federal support ... four threads still in motion.

A few threads are still live, and each could change the picture materially:

A 30-day negotiating window is open. Multiple analysts think it's being used as leverage rather than a settled policy. Desjardins' Royce Mendes has framed the move as part of an intensifying negotiation strategy ahead of U.S. midterm elections this fall, not a final position. Prime Minister Carney responded within hours of the announcement, saying Canada had already tabled "detailed and comprehensive proposals" to modernize CUSMA and stood ready to intensify talks. Whether that produces a carve-out, a delay, or nothing before August 19 is genuinely unknown.
Legal challenges are likely, but slow. Section 338 has not been used this way by a President. Legal scholars are already disputing whether Congress effectively superseded the provision through later trade legislation. Trade-focused commentators expect litigation, but caution it's more likely a 2027 or even 2028 story than something that changes facts on the ground before the effective date.
Watch for Canadian retaliation. If the tariff goes into effect and Canada responds with its own measures, Canadian businesses that import U.S. goods could see new costs on that side too. That's a separate risk from the one covered here, but they tend to move together historically.
This is part of a broader pattern, not an isolated event. Some trade analysts have described Section 338 as "the new IEEPA-International Emergency Economic Powers Act" because it could become the administration's preferred legal tool for future tariff actions. If you missed the earlier rounds, here's how the IEEPA tariffs worked.
Federal small-business support has had real gaps. The Regional Tariff Response Initiative, Ottawa's main support program through the last round of tariffs, drew criticism from the Canadian Federation of Independent Business for eligibility rules that excluded many of the smallest and hardest-hit businesses such as a 10-employee minimum in some provinces, and revenue thresholds that shut out sole proprietors. If new support measures are announced in response to Section 338, it's worth checking the fine print for whether home-based and one-person operations actually qualify, rather than assuming "small business support" includes you.

For a home-based business owner, the useful takeaway isn't the specific 50% number even though that's huge. It's that the Canada-U.S. trade relationship is being structurally rebuilt in real time, through new and untested legal tools, on a timeline measured in weeks rather than years. Bookkeeping systems, pricing models, and supplier relationships that assume yesterday's rules will hold tomorrow, are the ones most likely to get caught off guard by whatever comes next.

Watch for movement on Canada's internal trade barriers. One live example: nine provinces signed an agreement on July 21, 2026 allowing direct-to-consumer alcohol sales across provincial lines. This is a step toward breaking down Canada's internal trade barriers, announced by the Council of the Federation days after these tariffs were threatened. Most signatories are effectively live now; British Columbia is on a delayed rollout, targeting February 2027. Quebec and Yukon haven't signed yet but are reportedly working toward joining; the Northwest Territories and Nunavut have declined, citing their territories' unique circumstances.

What To Do Next - Examine Your Business Model

This tariff is one more data point, not a one-off crisis. The businesses handling this best are the ones that have been working on building flexible sourcing and pricing into their models. Some have grown their Canadian sales. Others are exploring export markets beyond the U.S..

Re-examine whether your current model is still viable in the current economy. KPMG reporting says economists and government officials are pointing toward a more resilient, domestic-focused business model built on three pillars: (1) local sourcing and domestic supply chains, (2) digital and AI automation, and (3) diversifying markets beyond the U.S.

Bottom line

Most Canadian home-based businesses fall into one of three groups under the new Section 338 tariffs.

Which situation applies to you? Most Canadian home-based businesses fall into one of three groups under the new Section 338 tariffs ... only the third faces a direct hit.

Only the third group faces a direct hit.

Most Canadian home-based businesses won't face an immediate impact.
Businesses that buy U.S. supplies, or sell to a Canadian business that exports, may see indirect cost pressure. There's no action needed yet.
Businesses exporting affected goods to the U.S. may find the U.S. market is no longer viable at current pricing. This isn't just a cost increase.
CUSMA no longer protects goods covered by Section 338. A valid certificate of origin offers no shield here.

The question worth asking isn't "Does this tariff affect me?" It is "Does my current business model still work in this economy?" If you were starting your business today in this economy, what would you do differently?

Sources consulted include the White House fact sheet on the July 20, 2026 proclamations; trade-law analysis from Troutman Pepper Locke, Baker McKenzie, and GHY International; Thomson Reuters' coverage of the full annex scope; The Globe and Mail's reporting on provincial and industry-level impacts; Axios and MLex on the legal and political context; and CFIB's (Canadian Federation of Independent Business) ongoing tracking of small-business tariff support programs.