Your ‘Surge Price’ Isn’t Demand—It’s a Tariff Spreadsheet: The Algorithm Retailers Use to Raise Prices Without Saying ‘Tariff’
That “surge” you’re seeing may have nothing to do with shoppers—and everything to do with tariffs, cost files, and software that can reprice shelves in minutes.
By TheMurrow Editorial
March 18, 2026
Key Points
- 1Separate the “surge” story: retail price jumps can be dynamic pricing, surveillance pricing, or fast cost pass-through via infrastructure.
- 2Follow the tariff timeline: Fed research finds 2018–2019 tariffs passed through fully and quickly—within two months—to consumer goods prices.
- 3Watch the software pipeline: pricing engines plus digital shelf labels let retailers propagate cost updates instantly, making tariff-driven increases feel sudden.
The price of a blender shouldn’t behave like a plane ticket. Yet many shoppers have had the same unnerving experience: you check a price on your phone, walk into the store, and it’s higher. Or the item that was on sale yesterday is suddenly “back to normal” today—except “normal” now costs more.
The reflex diagnosis is surge pricing. It’s a useful phrase because it captures a real feeling: prices moving faster than our ability to make sense of them. But “surge pricing” has become a catch-all for several different mechanisms, and that matters. If you misidentify what’s happening, you aim your anger—and your policy—at the wrong target.
Here’s the uncomfortable possibility: in retail, the “surge” often isn’t demand at all. Increasingly, it’s cost pass-through—including tariff costs—executed quickly by pricing software and made visible through digital shelf labels. To the shopper, it looks like opportunism. To the retailer, it can look like routine operations.
“A ‘surge’ can be a story we tell ourselves—when the real trigger is a spreadsheet of duties uploaded into a pricing engine.”
— — TheMurrow
The three things we call “surge pricing”—and why the label misleads
Retail pricing now changes for multiple reasons that feel identical at the checkout. Lumping them together is convenient for outrage and terrible for clarity.
1) Dynamic pricing (not necessarily personal)
Dynamic pricing means prices can vary by time, store, region, inventory, and competitive conditions. A retailer can change the price of the same item across locations or weeks without targeting individuals. In that sense, dynamic pricing is a management tool—sometimes defensive, sometimes aggressive.
The key point: dynamic pricing doesn’t require a demand spike. It requires a reason to update the number.
The key point: dynamic pricing doesn’t require a demand spike. It requires a reason to update the number.
2) Personalized pricing (“surveillance pricing”)
Personalized pricing is different: two people may see two different prices for the same product, based on data about them. The U.S. Federal Trade Commission has put this practice on the record. In a January 2025 press release tied to its 6(b) market study, the FTC said companies may use signals such as precise location and browser history, creating situations where “the same product could have a different price or promotion” depending on consumer-related inputs and context like time and channel. The FTC’s related research summaries, also dated January 2025, underscore that regulators are scrutinizing these individualized pricing ecosystems.
That doesn’t mean every price jump is personalized pricing. It means the possibility is real—and monitored.
That doesn’t mean every price jump is personalized pricing. It means the possibility is real—and monitored.
3) Faster price-change infrastructure
The third category is less dramatic but often more important: the store’s ability to change prices quickly. Digital shelf labels and centralized price systems can update thousands of items without printing and replacing paper tags.
Speed is not a motive. Speed is an amplifier. When costs move, prices can follow—almost immediately.
Speed is not a motive. Speed is an amplifier. When costs move, prices can follow—almost immediately.
“Speed isn’t a motive. It’s an amplifier.”
— — TheMurrow
Tariff pass-through is real—and it can show up fast
If the core claim is that retail “surges” can reflect tariffs rather than demand, the first question is basic: do tariffs actually move consumer prices in measurable ways?
The Federal Reserve says yes—and quickly. A FEDS Notes analysis published May 9, 2025 examined tariff pass-through to consumer prices using an event-study approach. For the 2018–2019 tariffs, the researchers found that changes were “passed through fully and quickly—within two months” to consumer goods prices. That timing matters because it undercuts the assumption that retail prices only drift upward slowly as inventories turn over.
The same Fed note offers a second, more recent datapoint: during January–March 2025, tariffs increased core goods PCE by roughly 0.33 percentage points, based on their pass-through estimate (β = 0.54) and a tariff-effect measure they cite (0.62%). Those numbers are modest at the macro level, but they’re large enough to be felt in categories where margins are thin and competition is brutal.
Other Fed institutions echo the general logic. An Atlanta Fed policy publication from February 2025 discusses measurable retail price effects under pass-through assumptions and emphasizes lags—how quickly changes appear and how long they last. A Boston Fed Current Policy Perspectives piece in 2025 models a scenario: if imports are about 10% of core PCE, a 15 percentage point increase in the average import tariff, with 50% pass-through, could imply about 0.75% higher core PCE prices in the following year. The Boston Fed also notes the estimate covers only certain channels and may omit imported-input effects.
These aren’t activist claims. They’re mainstream central-bank analyses describing how policy costs can flow through to consumers.
The Federal Reserve says yes—and quickly. A FEDS Notes analysis published May 9, 2025 examined tariff pass-through to consumer prices using an event-study approach. For the 2018–2019 tariffs, the researchers found that changes were “passed through fully and quickly—within two months” to consumer goods prices. That timing matters because it undercuts the assumption that retail prices only drift upward slowly as inventories turn over.
The same Fed note offers a second, more recent datapoint: during January–March 2025, tariffs increased core goods PCE by roughly 0.33 percentage points, based on their pass-through estimate (β = 0.54) and a tariff-effect measure they cite (0.62%). Those numbers are modest at the macro level, but they’re large enough to be felt in categories where margins are thin and competition is brutal.
Other Fed institutions echo the general logic. An Atlanta Fed policy publication from February 2025 discusses measurable retail price effects under pass-through assumptions and emphasizes lags—how quickly changes appear and how long they last. A Boston Fed Current Policy Perspectives piece in 2025 models a scenario: if imports are about 10% of core PCE, a 15 percentage point increase in the average import tariff, with 50% pass-through, could imply about 0.75% higher core PCE prices in the following year. The Boston Fed also notes the estimate covers only certain channels and may omit imported-input effects.
These aren’t activist claims. They’re mainstream central-bank analyses describing how policy costs can flow through to consumers.
“If tariffs can hit consumer prices within two months, ‘surge’ becomes less a mystery than a timeline.”
— — TheMurrow
Within two months
The Fed’s May 9, 2025 FEDS Notes found 2018–2019 tariff changes were passed through fully and quickly to consumer goods prices.
0.33 percentage points
The Fed estimates January–March 2025 tariffs raised core goods PCE by ~0.33pp using β = 0.54 and a 0.62% tariff-effect measure.
0.75% higher core PCE
Boston Fed modeling: if imports are ~10% of core PCE, a 15pp tariff increase with 50% pass-through could imply ~0.75% higher core PCE in the following year.
The quiet role of pricing software: turning costs into a “pricing ruleset”
Even if tariffs can pass through, shoppers still ask a fair question: why does the price change feel so sudden now?
One answer is operational. Large retailers don’t “decide” prices item by item in a back room anymore. Many rely on centralized pricing systems and price-optimization software designed to absorb new inputs—costs, promotions, competitor moves—and output updated prices across categories and channels.
Vendors in this space explicitly market AI-driven price optimization and granular adjustment capabilities, emphasizing that retailers can manage large assortments with frequent updates. Whether the retailer uses those tools to match competitors, protect margins, manage promotions, or respond to costs, the result is the same for the consumer: more frequent changes with less visible explanation.
This is where tariffs become especially relevant. A tariff change is not a philosophical debate inside a store. It’s a line in a cost file—duties and fees that alter unit economics. Once those cost updates flow into the system, the pricing engine can treat them as just another input to be reflected in shelf price, promotional depth, or both.
A telling data point comes from outside the vendor ecosystem. In the KPMG Tariff Pulse Survey (published October 2025), 37% of respondents said they adopted dynamic pricing to adapt to tariff changes. The phrasing is revealing: businesses themselves link tariff volatility to algorithmic repricing strategies.
Retailers can still claim their prices respond to “market conditions,” and that can be true in a narrow sense. But “market conditions” may mean the tariff schedule, freight, duties, and vendor allowances—cost-side dynamics—more than a rush of eager shoppers.
One answer is operational. Large retailers don’t “decide” prices item by item in a back room anymore. Many rely on centralized pricing systems and price-optimization software designed to absorb new inputs—costs, promotions, competitor moves—and output updated prices across categories and channels.
Vendors in this space explicitly market AI-driven price optimization and granular adjustment capabilities, emphasizing that retailers can manage large assortments with frequent updates. Whether the retailer uses those tools to match competitors, protect margins, manage promotions, or respond to costs, the result is the same for the consumer: more frequent changes with less visible explanation.
This is where tariffs become especially relevant. A tariff change is not a philosophical debate inside a store. It’s a line in a cost file—duties and fees that alter unit economics. Once those cost updates flow into the system, the pricing engine can treat them as just another input to be reflected in shelf price, promotional depth, or both.
A telling data point comes from outside the vendor ecosystem. In the KPMG Tariff Pulse Survey (published October 2025), 37% of respondents said they adopted dynamic pricing to adapt to tariff changes. The phrasing is revealing: businesses themselves link tariff volatility to algorithmic repricing strategies.
Retailers can still claim their prices respond to “market conditions,” and that can be true in a narrow sense. But “market conditions” may mean the tariff schedule, freight, duties, and vendor allowances—cost-side dynamics—more than a rush of eager shoppers.
37%
KPMG’s October 2025 Tariff Pulse Survey: 37% of respondents said they adopted dynamic pricing to adapt to tariff changes.
Key Insight
A tariff change isn’t a debate on the aisle—it’s a cost-line update. Once it enters enterprise systems, a pricing engine can propagate it across shelves and channels.
Digital shelf labels: the enabling tech, not the explanation
When people talk about “surge pricing in grocery stores,” they often point to electronic shelf labels. It’s an easy story: a screen where paper used to be feels like a mechanism for mischief.
The evidence points to something more mundane: digital shelf labels are primarily an efficiency tool that makes any price change—good, bad, or neutral—easier to execute.
Walmart, for example, announced on June 6, 2024 that it would expand digital shelf labels to 2,300 stores by 2026, pitching better outcomes for customers and associates. Trade coverage has tracked the rollout and described how remote updates can happen in minutes, replacing a labor-intensive process of printing and swapping tags.
That capability changes the rhythm of retail. Under paper labels, the friction of changing prices imposed an informal discipline. Under digital labels, friction disappears. If a cost change arrives on Tuesday, the shelf can reflect it on Tuesday—not next week when someone has time to replace tags.
That doesn’t prove demand-based surging. It proves the store has a faster nervous system.
The key distinction for readers: digital labels don’t create the reason for a price change. They reduce the time between the reason and the moment you notice it.
The evidence points to something more mundane: digital shelf labels are primarily an efficiency tool that makes any price change—good, bad, or neutral—easier to execute.
Walmart, for example, announced on June 6, 2024 that it would expand digital shelf labels to 2,300 stores by 2026, pitching better outcomes for customers and associates. Trade coverage has tracked the rollout and described how remote updates can happen in minutes, replacing a labor-intensive process of printing and swapping tags.
That capability changes the rhythm of retail. Under paper labels, the friction of changing prices imposed an informal discipline. Under digital labels, friction disappears. If a cost change arrives on Tuesday, the shelf can reflect it on Tuesday—not next week when someone has time to replace tags.
That doesn’t prove demand-based surging. It proves the store has a faster nervous system.
The key distinction for readers: digital labels don’t create the reason for a price change. They reduce the time between the reason and the moment you notice it.
When a price jump is demand—and when it’s cost pass-through
None of this means demand never matters. Retailers absolutely respond to seasonality, shortages, and local competition. The point is diagnostic: many of the price jumps consumers interpret as “surges” may be cost-driven rather than demand-driven.
Signs a change is likely cost pass-through
Cost pass-through tends to have a particular character:
- Broad and synchronized: multiple brands and retailers move similarly, especially in import-heavy categories.
- Sticky upward, limited downward: costs rise and prices follow; when costs ease, prices don’t always fall as quickly.
- Timed to policy or logistics changes: price shifts appear soon after known cost shocks, consistent with the Fed’s finding that tariff effects can transmit “within two months.”
The Fed’s May 2025 work provides a benchmark: if researchers can detect tariff effects on consumer prices in real time with event-study methods, then it’s plausible that retailers are also reacting quickly as those costs appear.
- Broad and synchronized: multiple brands and retailers move similarly, especially in import-heavy categories.
- Sticky upward, limited downward: costs rise and prices follow; when costs ease, prices don’t always fall as quickly.
- Timed to policy or logistics changes: price shifts appear soon after known cost shocks, consistent with the Fed’s finding that tariff effects can transmit “within two months.”
The Fed’s May 2025 work provides a benchmark: if researchers can detect tariff effects on consumer prices in real time with event-study methods, then it’s plausible that retailers are also reacting quickly as those costs appear.
Signs a change is likely cost pass-through
- ✓Broad and synchronized across brands and retailers, especially import-heavy categories
- ✓Sticky upward with limited downward movement when costs ease
- ✓Timed to policy or logistics changes, consistent with “within two months” transmission
Signs a change is likely dynamic pricing based on retail conditions
Dynamic pricing tied to operational conditions often looks like:
- Localized variation across stores or regions
- Frequent small adjustments rather than a single step-change
- Promotions changing as much as base price (discount depth shrinks, “sale” disappears)
Again, this can be rational and non-personal, even if it feels arbitrary.
- Localized variation across stores or regions
- Frequent small adjustments rather than a single step-change
- Promotions changing as much as base price (discount depth shrinks, “sale” disappears)
Again, this can be rational and non-personal, even if it feels arbitrary.
Signs a change is likely dynamic pricing (retail conditions)
- ✓Localized variation across stores or regions
- ✓Frequent small adjustments rather than a single step-change
- ✓Promotions change as much as base price (discount shrinks or “sale” disappears)
Where surveillance pricing complicates the picture
Surveillance pricing introduces a different worry: not “Why did the price rise?” but “Why did it rise for me?” The FTC has explicitly documented the use of consumer data signals that can drive individualized outcomes—location, browsing behavior, and more.
That concern deserves its own policy debate. But it shouldn’t distract from the more prosaic driver that may be moving many shelves at once: tariffs and other costs flowing through automated pricing pipelines.
That concern deserves its own policy debate. But it shouldn’t distract from the more prosaic driver that may be moving many shelves at once: tariffs and other costs flowing through automated pricing pipelines.
Editor’s Note
Not every jump is personalized pricing. But the FTC’s January 2025 record makes clear individualized price and promotion outcomes are real—and under scrutiny.
A real-world case study in plain sight: the tariff-to-shelf pipeline
A “case study” doesn’t need a whistleblower to be real. Sometimes it’s visible in how systems are built.
Start with the Fed’s empirical claim: for the 2018–2019 tariffs, consumer goods prices reflected tariff changes fully and within two months. Add the 2025 estimate: January–March tariffs contributed about 0.33 percentage points to core goods PCE based on pass-through assumptions. The macro story is clear: tariff costs do show up in what consumers pay.
Now layer in corporate behavior. KPMG reports that 37% of surveyed firms adopted dynamic pricing to adapt to tariff changes. That’s not a rumor; it’s a self-reported operational response to policy volatility.
Finally, add the infrastructure. Digital shelf labels—like Walmart’s planned expansion to 2,300 stores by 2026—and centralized pricing tools make rapid updates feasible at scale.
Put together, the “pipeline” looks like this:
Start with the Fed’s empirical claim: for the 2018–2019 tariffs, consumer goods prices reflected tariff changes fully and within two months. Add the 2025 estimate: January–March tariffs contributed about 0.33 percentage points to core goods PCE based on pass-through assumptions. The macro story is clear: tariff costs do show up in what consumers pay.
Now layer in corporate behavior. KPMG reports that 37% of surveyed firms adopted dynamic pricing to adapt to tariff changes. That’s not a rumor; it’s a self-reported operational response to policy volatility.
Finally, add the infrastructure. Digital shelf labels—like Walmart’s planned expansion to 2,300 stores by 2026—and centralized pricing tools make rapid updates feasible at scale.
Put together, the “pipeline” looks like this:
The tariff-to-shelf pipeline
- 1.Policy changes costs (tariffs and related duties alter landed cost).
- 2.Cost updates enter enterprise systems (merchandising, procurement, finance).
- 3.Pricing engines recompute targets (margin rules, competitive constraints, category strategy).
- 4.Stores update quickly (digital shelf labels and omnichannel pricing tools push new prices).
None of that requires a “surge” in shoppers. It requires a change in the inputs.
Retailers, of course, have discretion. They can absorb some costs, renegotiate with suppliers, or adjust promotions rather than base prices. But the pipeline explains why the lived experience of pricing has changed: not necessarily because retailers became more predatory, but because they became more automated—and because policy-driven costs can hit fast.
What shoppers—and policymakers—should take from this
People want a villain because the alternative is harder: a system where the cause of a price change is distributed across policy, supply chains, and software.
Practical takeaways for readers
If you want to make smarter decisions in a fast-changing price environment:
- Track prices across retailers and channels. Cost pass-through often appears broadly, while store-specific dynamic moves can vary by location.
- Watch promotions as much as base price. A disappearing discount can function like a price increase.
- Be cautious with the word “surge.” It can refer to demand-based dynamic pricing, cost pass-through, or individualized pricing. Those require different responses.
- Track prices across retailers and channels. Cost pass-through often appears broadly, while store-specific dynamic moves can vary by location.
- Watch promotions as much as base price. A disappearing discount can function like a price increase.
- Be cautious with the word “surge.” It can refer to demand-based dynamic pricing, cost pass-through, or individualized pricing. Those require different responses.
Practical takeaways for readers
- ✓Track prices across retailers and channels; cost pass-through is broad while store-specific moves vary
- ✓Watch promotions as much as base price; disappearing discounts can function like increases
- ✓Be cautious with “surge”; it may mean demand-based, cost pass-through, or individualized pricing
Implications for transparency
Retailers rarely label a price change “tariff-related,” even when tariffs are part of the reason. That omission is understandable—no one wants to litigate trade policy on an aisle endcap. Still, the cumulative effect is public confusion and suspicion.
Regulators are already looking at one part of this picture. The FTC’s January 2025 findings highlight how personal data can shape prices and promotions. If individualized pricing expands, transparency will become more than a consumer-rights issue; it will become a basic trust issue.
For policymakers, the Fed’s research should sharpen the debate: tariffs are not abstract leverage. They can pass through to consumer prices quickly. If the goal is to protect households from price pressures, speed matters as much as magnitude.
The simplest, most honest interpretation may be the most unsettling: a growing share of retail price volatility is not a story about your neighbors suddenly buying more. It’s a story about costs, coded into systems, expressed on a screen.
Regulators are already looking at one part of this picture. The FTC’s January 2025 findings highlight how personal data can shape prices and promotions. If individualized pricing expands, transparency will become more than a consumer-rights issue; it will become a basic trust issue.
For policymakers, the Fed’s research should sharpen the debate: tariffs are not abstract leverage. They can pass through to consumer prices quickly. If the goal is to protect households from price pressures, speed matters as much as magnitude.
The simplest, most honest interpretation may be the most unsettling: a growing share of retail price volatility is not a story about your neighbors suddenly buying more. It’s a story about costs, coded into systems, expressed on a screen.
1) Is “surge pricing” in retail the same as surge pricing for ride-hailing?
Not exactly. Ride-hailing surge pricing is typically framed as demand outstripping supply in real time. Retail “surge pricing” is often a mix of dynamic pricing, faster repricing infrastructure, and sometimes cost pass-through (including tariffs). The outcome—higher prices—can look similar, but the drivers can be very different.
2) Do tariffs really raise consumer prices, or do companies just absorb them?
Research suggests tariffs can and do pass through to consumer prices. A Federal Reserve FEDS Notes analysis published May 9, 2025 found that for 2018–2019 tariffs, consumer goods price changes were “passed through fully and quickly—within two months.” The extent can vary by product and market structure, but measurable pass-through is documented.
3) How fast can tariff-related costs show up on shelves?
The Fed’s May 2025 analysis indicates tariff effects can appear in consumer goods prices within two months in the 2018–2019 episode. Modern pricing operations can also update prices quickly once cost changes are recorded. Digital shelf labels and centralized pricing systems reduce the lag between a cost change and a visible shelf price change.
4) Are digital shelf labels evidence that stores are changing prices constantly to exploit shoppers?
Digital shelf labels mainly make price changes easier to execute; they do not prove the reason for a change. Walmart, for instance, said in June 2024 it would expand digital shelf labels to 2,300 stores by 2026. That infrastructure can reflect cost updates faster—but it can also reduce errors and improve operational efficiency.
5) What is “surveillance pricing,” and is it common?
Surveillance pricing refers to individualized prices or promotions shaped by personal data. The FTC reported in January 2025 that companies may use data signals like precise location and browser history, meaning the same product could have different prices or promotions depending on inputs. How common it is varies by sector, but regulators are actively investigating it.
6) Why do retailers say prices respond to “market conditions” instead of naming tariffs?
“Market conditions” can include many inputs: tariffs, freight, vendor terms, competition, inventory, and seasonality. Retailers may avoid citing tariffs because the causes are multi-factor and because the messaging can become politically charged. Operationally, tariff costs can enter pricing systems as part of landed cost—so the “reason” is embedded in the cost structure rather than announced.
7) What’s one statistic that shows tariffs mattered in 2025?
The Fed’s May 2025 note estimates that during January–March 2025, tariffs increased core goods PCE by about 0.33 percentage points, based on a pass-through estimate (β = 0.54) and a cited tariff-effect measure (0.62%). It’s not a headline-grabbing number on its own, but it’s large enough to contribute to the price pressure consumers notice.
The most revealing detail about modern pricing isn’t how often the number changes. It’s how quickly a cost can become a number—and how rarely anyone tells you which cost it was.
T
About the Author
TheMurrow Editorial is a writer for TheMurrow covering business & money.
Frequently Asked Questions
Is “surge pricing” in retail the same as surge pricing for ride-hailing?
Not exactly. Ride-hailing surge pricing is typically framed as demand outstripping supply in real time. Retail “surge pricing” is often a mix of dynamic pricing, faster repricing infrastructure, and sometimes cost pass-through (including tariffs). The outcome—higher prices—can look similar, but the drivers can be very different.
Do tariffs really raise consumer prices, or do companies just absorb them?
Research suggests tariffs can and do pass through to consumer prices. A Federal Reserve FEDS Notes analysis published May 9, 2025 found that for 2018–2019 tariffs, consumer goods price changes were “passed through fully and quickly—within two months.” The extent can vary by product and market structure, but measurable pass-through is documented.
How fast can tariff-related costs show up on shelves?
The Fed’s May 2025 analysis indicates tariff effects can appear in consumer goods prices within two months in the 2018–2019 episode. Modern pricing operations can also update prices quickly once cost changes are recorded. Digital shelf labels and centralized pricing systems reduce the lag between a cost change and a visible shelf price change.
Are digital shelf labels evidence that stores are changing prices constantly to exploit shoppers?
Digital shelf labels mainly make price changes easier to execute; they do not prove the reason for a change. Walmart, for instance, said in June 2024 it would expand digital shelf labels to 2,300 stores by 2026. That infrastructure can reflect cost updates faster—but it can also reduce errors and improve operational efficiency.
What is “surveillance pricing,” and is it common?
Surveillance pricing refers to individualized prices or promotions shaped by personal data. The FTC reported in January 2025 that companies may use data signals like precise location and browser history, meaning the same product could have different prices or promotions depending on inputs. How common it is varies by sector, but regulators are actively investigating it.
Why do retailers say prices respond to “market conditions” instead of naming tariffs?
“Market conditions” can include many inputs: tariffs, freight, vendor terms, competition, inventory, and seasonality. Retailers may avoid citing tariffs because the causes are multi-factor and because the messaging can become politically charged. Operationally, tariff costs can enter pricing systems as part of landed cost—so the “reason” is embedded in the cost structure rather than announced.
