Start with the direction of the price, because that is where the shortage framing goes wrong. A Canadian duty of 25% on American toilet paper and facial tissue [5] makes a roll dearer in Winnipeg, not in Wichita, and a US mill that loses Canadian orders is a mill holding inventory it has to move in a home market where the average consumer already gets through 141 rolls a year [13]. Inventory that has to move clears at a discount.
The 2020 comparison argues the same way. US tissue sales on March 12, 2020 ran 734% above the same day a year earlier, making it the top-selling grocery item in the country that day [9], roughly 70% of the world's grocery stores ran out at some point [10], and researchers who went back over the episode found no break in production at all, with mills running throughout and hoarding accounting for nearly all of the empty shelf [11]. That was a demand shock, not a supply shock, even though it looked like one on shelves. A tariff schedule works differently: both sides see it coming and can price it in before it lands.
The line item worth an operator's attention is raw wood pulp at 50% against finished toilet paper at 25% [5], which sets the input at twice the rate of the output [17]. Escalation normally runs the other way, since you protect converting capacity by taxing finished goods harder than feedstock. Ottawa has inverted it, which reads either as shelter for Canadian pulp producers against US pulp, or as a rate struck where the trade volume is small enough for the ratio to be gestural. Fortune does not give the volumes, and without them the ratio is as far as I would push it.
Carney promised to match Washington dollar for dollar and said "you're at war when you get attacked" [3], so the matching is worth checking. Fifty percent on roughly $20bn is $10bn of duty a year if flows hold [15], and flows do not hold at 50%, which is the reason for picking that number. The C$27.6bn Ottawa puts against the same $20bn implies a loonie near 1.38 [14]. Against that base, the C$7.5bn relief package for small and medium Canadian businesses [8] is about 27% of the exposed export value [16], or roughly 54% of the C$13.8bn of duty those exports would carry at 50% [20]. That C$7.5bn is sized as a cushion against roughly a quarter of the exposure, and that is the extent of what it covers.
The harder allocation call sits in autos rather than paper: 25% on Canadian cars and parts now, with a threat to take it to 50% absent a deal by January 1, 2027 [7], leaves under four months to requalify a supplier [19]. Requalifying a stamping line's supply chain takes longer than a single quarter allows.
The thesis is that this is a Canadian consumer price event and a US demand event, and it fails in one observable way. If Washington answers by tariffing Canadian pulp on the way south, the input squeeze becomes American and the price direction flips; short of that, what would falsify me is US retail tissue prices firming after September 8 instead of softening, or mills trimming shifts. A buyer who front-loads a quarter of napkin inventory before the deadline has converted working capital into a pallet of paper on the bet that I am wrong, which is a perfectly rational bet at 50% on towels and napkins [5].
