TariffWise
Tariff Margin Impact Calculator
See exactly how much a tariff eats your margin — and the price or cost change needed to claw it back.
Margin damage from a 25 percent tariff at different starting margins
Every row sells at $100 a unit and faces the same 25 percent tariff on a fully imported cost, so only the starting margin changes. The tariff is applied to the landed cost, and the new margin is the same $100 price against the higher cost.
| Landed cost before tariff | Original gross margin | Tariff cost per unit | Margin after 25% tariff | Margin lost (pp) |
|---|---|---|---|---|
| $85.00 | 15.0% | $21.25 | -6.3% | 21.3 |
| $80.00 | 20.0% | $20.00 | 0.0% | 20.0 |
| $75.00 | 25.0% | $18.75 | 6.3% | 18.8 |
| $70.00 | 30.0% | $17.50 | 12.5% | 17.5 |
| $60.00 | 40.0% | $15.00 | 25.0% | 15.0 |
| $50.00 | 50.0% | $12.50 | 37.5% | 12.5 |
| $40.00 | 60.0% | $10.00 | 50.0% | 10.0 |
| $30.00 | 70.0% | $7.50 | 62.5% | 7.5 |
Thin-margin products are hit twice: they carry more imported cost per unit of price, so the tariff cost is larger in dollars, and that larger cost eats a much smaller margin. A 15 percent margin goes negative at this rate while a 60 percent margin stays comfortably profitable, which is the ranking to apply before deciding which SKUs need a price change first. At 100 percent imported share the price that restores the original margin is always the original price multiplied by 1.25, so $125.00 in every row above - the recovery price scales with the tariff, not with your margin. Imported share changes that: on the 40 percent margin row, a 25 percent tariff on only 50 percent imported cost adds $7.50 rather than $15.00, cuts margin to 32.5 percent instead of 25.0 percent, and needs $112.50 rather than $125.00 to recover. Illustrative only, and not customs or legal advice; confirm the applicable rate, classification and country of origin with a licensed customs broker.
A tariff margin impact calculator shows importers and brands the precise effect a customs tariff has on the profitability of a product, and what it would take to protect the margin. When a new tariff lands on goods from a particular country, the headline rate rarely tells you what actually happens to your bottom line — that depends on how much of your landed cost is imported, what you sell the item for, and how the tariff cost stacks against your existing margin. This tool turns the tariff rate into a concrete cost per unit and a new gross margin, then works out the price increase or supplier-cost reduction needed to hold your original margin.
The calculation is deliberately simple and transparent. It takes the landed cost of the product before any tariff, multiplies it by the share of that cost which is actually imported and subject to the duty, and applies the tariff rate to produce the tariff cost per unit. Adding that to the original landed cost gives the new, higher cost of goods. From there it computes the original gross margin (price minus landed cost, over price) and the new gross margin after the tariff, and reports the difference in percentage points so you can see the erosion at a glance. Finally, it solves for the selling price that would restore your original margin percentage, and shows the equivalent supplier-cost reduction that would offset the tariff entirely — the two levers you have to defend profitability.
The reason the source research recommends running this per SKU and per country of origin is that the impact is never uniform. A product with a thin margin is hurt far more by the same tariff rate than a high-margin one, because the tariff cost consumes a larger share of what little margin exists. Products assembled from components sourced in several countries have only part of their cost exposed to any one country's tariff, so the imported-share input matters enormously. And the realistic response is almost always a blend — a modest price rise, a negotiated supplier discount, a change in country of origin, or a tariff-engineering reclassification — rather than absorbing the whole hit or passing it all to customers. Use this calculator as the first step in that analysis: quantify the damage precisely for each affected product, then decide how to split the recovery between price and cost. It is a margin-planning tool, not customs or legal advice, and the applicable duty rate and classification for any specific product should be confirmed with a licensed customs broker.
Thin-margin products get hit hardest
The same tariff rate does very different damage depending on your starting margin. A 25% tariff on a product with a 60% margin is uncomfortable; on a product with a 15% margin it can wipe out profitability entirely, because the tariff cost eats a much larger share of the thin margin. Always rank your SKUs by margin before deciding which ones need a price change first.
Imported share is the input people forget
Tariffs apply only to the imported portion of your cost, at the applicable country of origin. A product assembled from components sourced across several countries may have only 40% of its landed cost exposed to a given tariff. Getting the imported-share input right — and considering whether shifting origin or reclassifying the product is possible — often matters more than the headline rate.
Frequently asked questions
A $100 product costs $60 landed, fully imported, and faces a 25% tariff — what happens to my margin?
The tariff adds $15 per unit ($60 × 25%), pushing landed cost to $75. Gross margin falls from 40% to 25% — a 15 percentage-point hit. To hold the original 40% margin you'd need to price at $125, or cut supplier cost by $15 (or some combination of the two).
Why does 'imported share of cost' matter?
Tariffs apply only to the imported portion of a product's cost. If half your landed cost is domestic value-add and half is imported components, only that imported half is taxed — halving the tariff's impact versus a fully imported good. Entering the true imported share is essential for an accurate estimate.
Should I pass the whole tariff on to customers?
Rarely all at once. Fully passing a tariff through can hurt demand, while fully absorbing it hurts margin. Most importers split the recovery — a partial price rise, a negotiated supplier discount, and sometimes a change in country of origin or product classification. This tool shows the two endpoints (full price rise vs full cost cut) so you can choose a blend.
How is this different from a landed cost calculator?
A landed cost calculator totals what it costs to get a product to your door (goods, freight, duty, fees). This one focuses on the margin consequence of a tariff specifically — how many points of gross margin you lose and the price or cost change needed to recover them. Use landed cost to know your cost, and this to defend your margin.
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Last updated: September 6, 2026