The Amazon Pricing Strategy Arbitrage Sellers, Wholesalers, and Private Label Brands Each Get Wrong

Three forces are squeezing Amazon seller margins at the same time. Each one raises your break-even price or shrinks the margin above it.

Fees. Amazon raised FBA fulfilment fees from 15 January 2026. Supply Chain Dive reported an average increase of $0.08 per unit, with bigger rises in some tiers: small items priced between $10 and $50 went up by $0.25, small items above $50 by $0.51, and Multi-Channel Fulfilment orders by $0.30 on average. Small per unit, large across a catalogue.

Advertising. More sellers bidding on the same Sponsored Products keywords means a higher cost per click, and ad spend is a real cost of every ad-attributed sale. If your net margin before advertising is 28% and your ACoS is 20%, you keep 8% on those sales.

Low-cost competition. Marketplace Pulse reported that active sellers fell from 2.4 million in 2021 to 1.65 million by the end of 2025, and that Chinese sellers crossed 50% of Amazon's global active seller base. It calls the combined squeeze on margins the "Great Compression". In crowded categories, the price the Buy Box rewards now sits closer to many sellers' floors.

Any one of these is manageable. Together they punish a strategy that was set up once and never revisited. Most sellers keep whatever was configured at installation. Three months later, arbitrage sellers are holding competitive prices on units that are accumulating storage fees. Wholesale sellers are hitting a floor that was estimated wrong. Private label sellers are locked in a price war with hijackers they never meant to compete with.

The correct strategy differs by seller type. The configuration difference is small and specific. The commercial difference over a quarter is not.

TL;DR: Arbitrage sellers need velocity-based repricing so slow stock sells before storage fees build up. Wholesale sellers need a Net Margin floor, not a blanket minimum, so fee and cost changes reach the floor automatically. Private label sellers need to keep hijackers out of the competitive set and hold the brand price. Each fix is one setting. When your costs rise, recalculate the floor first, then raise prices in steps. The 30-day metric that confirms each fix is different for each seller type.

Arbitrage sellers: why competitive repricing without a velocity signal costs margin on slow stock

Standard competitive repricing holds the competitive Buy Box price on every ASIN, whether the product sells in three days or sits in FBA for three months. For arbitrage sellers with small lots and no guarantee of steady demand, that is the wrong default.

The problem (illustrative example). An arbitrage seller buys 8 units of a product at a retailer. Five sell in week one at $18.50. Three remain. More sellers join the listing, the competitive price falls to $14.80, and the repricer follows it down. The three remaining units now sit in FBA, collecting monthly storage fees, while the repricer waits for a competitive price that is not coming back.

For those three units the right signal is not "match the Buy Box". It is "sell these before storage fees consume the remaining margin".

The velocity signal. Velocity-based repricing adjusts the price range according to sell-through rate. When units sell faster than your target, the repricer can move up and capture more margin while demand supports it. When velocity falls below target, it moves toward the floor to stimulate sales and limit storage cost on slow inventory. For arbitrage sellers, the threshold is the setting that matters: how many units per week before the repricer shifts from holding the competitive price to pushing lower?

Wholesale sellers: why a blanket floor is not the same as a Net Margin floor

Wholesale sellers buy large quantities from one or two suppliers at consistent prices. The common mistake is setting one blanket minimum at account setup, from a rough cost-plus estimate, and leaving it alone as FBA fees, referral rates and supplier prices move.

The problem (illustrative example). A wholesale seller sets a $21.00 minimum across a home goods category. The calculation checks out on the day. Six months later, the FBA fee, the supplier price and a referral rate have all moved, but the repricer still enforces $21.00. Every unit sold on an affected ASIN is sold below the true break-even.

On a 500-unit order sold $0.75 below the correct floor, that is $375 of margin gone. No alert fires and revenue looks healthy. The error surfaces only when unit profitability is calculated, which many sellers do quarterly.

The Net Margin solution. Net Margin Repricing calculates the floor from cost inputs instead of a typed number:

Minimum price = (landed cost + FBA fee + inbound shipping) ÷ (1 minus referral fee rate minus target margin rate)

A blanket floor is a number that ages. A Net Margin floor is a formula that stays current, as long as the inputs do.

Private label sellers: why competitive repricing against hijackers triggers the race you were trying to avoid

Private label sellers own the brand and usually hold the only legitimate offer on their ASIN. When an unauthorised or grey-market seller appears, a competitive repricer treats that offer as a genuine competitor.

The problem (illustrative example). A private label seller prices a product at $34.99 and holds the Buy Box. An unauthorised seller appears at $22.99. The repricer detects the offer and undercuts it at $22.50. That is the wrong response for four reasons:

• The seller has cut their own price to compete with someone who may be selling counterfeit or grey-market stock.

• Lower prices tell other hijackers that price competition on this ASIN pays.

• The seller's own repricer degrades the brand's intended retail price.

• A hijacker problem needs Brand Registry enforcement, not price matching.

The correct configuration. Exclude low-credibility sellers from the competitive set, and cap the price at the brand's intended retail price. A minimum feedback count of 10 and a minimum positive feedback of 90% is a sensible starting filter, because a new hijacker account often has little feedback history, though it is not guaranteed. Hold the brand price, and file Brand Registry complaints through Amazon's standard channels.

The correct strategy for each seller type and the one setting that changes everything

Each seller type has one change that produces the largest improvement. Everything else is secondary until it is in place.

Arbitrage sellers: set the velocity threshold

The single setting is the velocity threshold in your repricing rule: the sell-through rate below which the repricer moves from competitive positioning to pushing lower. Without it, the repricer holds the competitive price on every unit regardless of how long it has been in FBA. As a starting point, if an ASIN has not sold in 14 days, lower the price by 5% toward the floor each week. Adjust it to your lot sizes and category demand.

Wholesale sellers: switch from a blanket minimum to a Net Margin floor

The single setting is the floor input method. Replace the manually typed minimum with Net Margin inputs per ASIN. Enter landed cost, including prep, for each ASIN. For a wholesale seller with a limited number of supplier SKUs, that is a one-off job. After that, the floor recalculates whenever an input changes.

Private label sellers: filter the competitive set and cap the price

The single setting is the minimum feedback filter on the competitive set. Check the maximum price at the same time. It should be the brand's intended retail price for each ASIN, the most the repricer will ever target.

What one Buy Box percentage point is worth

Buy Box share is not a vanity metric. Each point of share has a money value, and it is larger than most sellers expect. The maths below is illustrative.

WebFX, citing Wiser data, puts the Buy Box at 82% of Amazon sales. Take a listing that generates $5,000 a month. The Buy Box accounts for $4,100. Assume four FBA sellers of roughly equal standing, each with about 25% of that, which is $1,025 a month. (Amazon does not split the Buy Box evenly, so treat the equal split as a simplification.)

• Share gain. Improve share from 25% to 35% and your Buy Box sales rise to $1,435 a month, a gain of $410. At a 20% net margin that is $82 a month of extra net income from one ASIN. Each percentage point is worth about $8.20 a month.

• Price effect. Now assume that a well-configured repricer also lifts your average selling price by 3%, because it raises prices in thin-competition windows instead of sitting at the lowest price all day. Volume and price compound: 1.40 × 1.03 = 1.442, so the $1,025 baseline becomes about $1,478. That is a gain of about $453, or roughly $91 a month of net income at 20%.

Share and price can improve together when the strategy is right. Neither comes from simply being cheapest.

How to reconfigure if you recognise your seller type in the wrong strategy

Reconfiguring does not mean starting again. Each change targets one parameter.

• Arbitrage: add a secondary rule below your velocity threshold that moves the price toward the floor. Check that your plan includes velocity-based repricing.

• Wholesale: pull landed cost per ASIN from your buying records, switch the floor method to Net Margin inputs, and confirm the FBA fee and referral rate match Amazon's current schedule. Wherever the calculated floor is higher than the old blanket minimum, that ASIN was under-protected.

• Private label: set the competitive set filter, then check which current offers fall below it. Those were the offers triggering incorrect price responses. File a Brand Registry complaint for each hijacker you find.

For every change, run Safe Mode on the affected ASINs for at least 7 days. Safe Mode simulates repricing without publishing live price changes, so you can confirm the new rules produce better simulated outcomes before going live.

Worked examples: before and after

The four scenarios below are illustrative, built from realistic seller inputs. They are not customer case studies, and the outcomes show a pattern, not a guaranteed result.

Scenario 1: an arbitrage seller moves from manual pricing to a calculated floor

An arbitrage seller with 38 active FBA ASINs checked competitor prices three times a week in Seller Central. Most ASINs had no minimum price. The seller had sold 22 units across three ASINs below cost, because nothing stopped the price falling under sourcing cost, and most competitive events between checks went unanswered. The seller estimated winning about 19% of Buy Box sessions on three-seller listings, against an equal-share baseline of 33%.

Change: a floor per ASIN from the Net Margin formula, a maximum price per ASIN, a competitive set filter for FBA offers with 90%+ positive feedback, and 7 days in Safe Mode before going live.

Illustrative outcome at 30 days: Buy Box share on three-seller listings up from about 19% to 39%, no sales below cost, and manual pricing time down from about 6 hours a week to a 30-minute monthly check.

Scenario 2: a wholesale seller activates Net Margin Repricing on a slow-moving ASIN

A wholesale seller had sold a home goods product for 14 months on a static minimum of $27.00, set at account opening. Since then, the FBA fee and the supplier price had both risen and the minimum had not moved.

Change: Net Margin inputs of $14.75 landed cost, $0.50 prep, $5.02 FBA fee, a 15% referral rate and an 18% target margin.

New floor: ($14.75 + $0.50 + $5.02) ÷ (1 − 0.15 − 0.18) = $20.27 ÷ 0.67 = $30.25.

Illustrative outcome: the old floor sat $3.25 per unit too low. At 150 units a month, that is $487.50 of margin recovered. The next FBA competitor was at $31.50, so the seller kept the Buy Box at the new floor. On a slow-moving ASIN the benefit is floor accuracy, not faster sales. Velocity is a job for a velocity rule.

Scenario 3: a private label seller defends brand value with a maximum price

A private label supplement was priced at $34.99. An unauthorised seller appeared at $22.99 with 3 feedbacks and 33% positive feedback. The repricer undercut it to $22.50.

Change: a minimum feedback filter of 10 and 90% positive, a maximum price of $34.99, and a rule that raises the price toward that maximum when no eligible competitor remains. A Brand Registry complaint went in alongside.

Illustrative outcome: the hijacker was filtered out immediately, so the price returned to $34.99 within 48 hours. That is 55% more revenue per unit than $22.50. The hijacker stayed on the listing until Brand Registry action removed them, but the repricer no longer treated them as a price signal. The price war ended because the repricer stopped reacting.

Scenario 4: an eBay seller replicates Amazon pricing with the Multichannel Price Replicator

A seller with 60 ASINs listed on both Amazon FBA and eBay spent about 4 hours a week updating eBay prices by hand. Amazon prices on competitive listings change several times a day, so eBay prices lagged by 5 to 7 days.

Change: the Multichannel Price Replicator (a Premium plan feature) to carry the Amazon pricing logic across to eBay, with an offset to cover eBay's different fee structure. In this example the offset is $1.50.

Illustrative outcome: no manual eBay pricing time, and eBay prices that follow Amazon's movements instead of reflecting a week-old snapshot.

What each scenario shows

The correct strategy responds to the right signal for your situation. Manual pricing responds too slowly and cannot stop below-floor sales. A static floor reflects costs that were accurate once. A competitive rule with no filter reacts to sellers who should not influence the brand price. Manual multichannel syncing cannot match the speed of the source channel. In every case the change was one targeted setting.

To apply this to your catalogue, find your seller type, make the matching change, test it in Safe Mode, then run the 10-point repricing audit. If you are unsure whether you need a repricer at all, the FBA repricer decision guide shows where manual pricing breaks down.

Pricing when your costs rise

Your supplier raises prices. Your freight forwarder does the same. Or Amazon changes its fee schedule and your floor has been wrong since the day it took effect. In each case the result is the same: your minimum now sits below your real break-even, and every sale at or near that floor loses margin.

The cost increase is not the real problem. Increases happen. The problem is the gap between the cost changing and the floor catching up, which in many accounts is measured in weeks.

The real cost of supplier increases

Costs rise from several directions at once: supplier invoices, freight, duty and Amazon fees. Sellers with typed floors absorb each one silently, and the loss shows up in the Payments report rather than on a repricing dashboard.

The arithmetic is simple, and it adds up fast. Suppose a SKU sells 300 units a day at its floor and its cost rises by $0.25 per unit without a floor update. That is $75 a day, about $2,250 a month, and about $27,000 over a year, on one SKU. Order volume and Buy Box share look fine throughout.

Recalculating break-even when costs rise

Use the same formula as before, with the updated cost. Worked example: landed cost $9.00, FBA fee $3.18 and inbound shipping $0.45 give $12.63 of cost. At a 15% referral fee and a 25% target margin, the floor is $12.63 ÷ 0.60 = $21.05.

Now the supplier raises the landed cost by $2.50, to $11.50. Total cost becomes $15.13, and the new floor is $15.13 ÷ 0.60 = $25.22. The floor rises by $4.17, which is more than the $2.50 cost increase, because the referral fee and the target margin both take a share of the selling price, so each extra dollar of cost needs about $1.67 of price to cover it.

The same effect applies to fee changes. An FBA fee rise of $0.25 lifts the floor from $21.05 to $21.47, an increase of about $0.42. A seller who ignored a fee rise has been under-priced by more than the headline figure.

Three steps:

1. Pull the updated cost for every affected ASIN: supplier invoice, freight and any duty change on the latest or pending shipment.

2. Rerun the formula for each ASIN. A spreadsheet handles a large catalogue.

3. Update the minimum price before the next sale on each ASIN. For a large catalogue, use your repricer's import feature instead of editing ASINs one by one.

For the full list of fee components behind the formula, see the Amazon seller fees guide.

Raising your minimum without losing the Buy Box

A higher floor means a higher selling price on any listing where you were selling at the floor. Price well above the competitive range and you lose Buy Box share, and Amazon may stop showing your offer in the Buy Box at all if your price is far above what it treats as normal for that listing. The risk is manageable.

Check the competitive range first. If rivals sit at $24 to $27 and your new floor is $25.22, you are inside the range and your share is likely to hold. If rivals sit at $22 to $24, the same floor puts you above every one of them. Then the decision is commercial, not mechanical: accept lower share, accept a lower margin on that ASIN, or consider whether the ASIN is worth selling at your current cost.

Raise in steps. A jump of $4.17 in one move is far riskier than a series of small ones. Raise the price by $0.25 to $0.50 at a time, check Buy Box share after each step, and hold wherever share starts to fall. At $0.25 steps the example above takes about 17 moves.

Look for cover. Increases are easiest when competitors' costs have risen too, as with fee changes that hit a whole category. If others have already moved up, follow them.

Absorb or pass on? A dominant seller with strong reviews and deep stock can usually pass on a gradual rise. One of several equal FBA sellers rotating the Buy Box may do better absorbing part of it. Absorbing indefinitely, with no plan to recover the margin, is not a strategy.

Book a Demo to see how Net Margin Repricing keeps your floor in step with your costs, instead of waiting for you to find the gap in the Payments report.

How Net Margin Repricing accounts for cost changes

A floor stored as a typed number goes stale the moment any cost changes. A floor derived from cost inputs moves when the inputs move. That is what Profit Protection does: the minimum is calculated from your cost structure and target margin, and the algorithm cannot sell below it. Cost data can be entered or pulled from a connected ERP or inventory system, such as Linnworks or Extensiv.

Three situations where this matters most:

• A supplier price increase. Update the landed cost input and the minimum recalculates, instead of you editing a floor field on every ASIN.

• An Amazon fee change. Update the fee input and the floor reflects the new fee.

• A change in target margin. Raise it from 25% to 30% once and every floor that uses it recalculates.

The value is greatest across large catalogues. Net Margin Repricing is a Premium plan feature, and the floor is only as current as its inputs, so update landed cost when you restock.

Building a cost-change buffer

A floor set exactly at your target leaves no room for the next cost increase. A small buffer in the target margin gives you a window to react before the floor is wrong.

Take the earlier example: cost $12.63, 15% referral fee, 25% target margin, floor $21.05. Add a 3 point buffer, so the floor uses a 28% target margin: $12.63 ÷ 0.57 = $22.16. Now suppose cost rises by $0.50, to $13.13. At $22.16, your margin is 85% minus $13.13 ÷ $22.16, which is about 25.8%. The buffered floor still delivers your original 25% target on the new cost, so you have time to update. It covers cost rises of up to about $0.67 per unit before that stops being true.

The buffer is not free. A higher floor is a higher minimum selling price, and on contested listings it can cost you Buy Box share. The 3 points here are illustrative. Size yours from the cost movements you have seen in your category over the past year, and check the buffered price still sits inside the competitive range.

Competing with Amazon itself on price and service

If you run your own web store, you also compete with Amazon as a retailer. It is known for sharp pricing and efficient service, and it can accept long-term losses on some products. You will not match that everywhere, but you can compete on two fronts.

Price: minimise fees, use a repricing tool

Lower costs let you hold the same margin at a lower price. Three places to look:

• Warehousing. Is your warehouse or 3PL contract efficient, and has your deal been renegotiated recently?

• Web store fees. Are you on the right plan for the features you use, and what are you paying in transaction fees?

• Inventory costs. Could you negotiate better minimum order quantities, or afford to buy in bulk for a lower unit price?

Then automate the pricing itself. With a large catalogue, repricing by hand cannot keep up with how often competitor prices move. A repricing tool lets you set rules or use pre-defined strategies, move prices up as well as down, and protect margins with price boundaries. For multichannel sellers, the Multichannel Price Replicator can carry your Amazon pricing logic across to eBay, Walmart, Shopify and other webstores.

Service: find a point of difference, become the expert, customer service software, show personality

Service is where a smaller seller can win outright, because Amazon cannot match it in these four areas.

• Find a point of difference. Something that sets your brand apart, such as a cause, a design, a specialism or a community, can win the sale even at a higher price, because buyers are getting something extra.

• Become the expert. Amazon sells almost everything and knows little about most of it. If your team can recommend the right product and help the buyer install or use it, you offer aftercare Amazon does not.

• Use customer service software. Fast, consistent replies are the baseline. A help desk that assigns cases to named team members, so none are missed, and uses reply templates for common situations, lets you respond quickly in busy periods without losing quality.

• Show personality. Amazon's service is efficient but impersonal. A distinct tone of voice, and personal touches in the parcel such as a thank-you note, a relevant recommendation or a recipe card for consumables, are things Amazon does not allow third-party sellers to do on FBA orders.

Beating Amazon on price alone is a race you will often lose. Pair a defensible price with service and personality and buyers have a reason to choose you.

Testing your strategy: the 30-day metrics that confirm it is working

Buy Box win rate alone does not tell you whether the fix worked. Use the metric that matches your seller type, and compare it with a baseline taken before the change.

• Arbitrage sellers: days in FBA for slow-moving ASINs should fall. Average selling price on fast-moving ASINs should hold or rise. Storage fee spend on previously slow units should drop.

• Wholesale sellers: gross profit per unit, calculated from Business Reports and your cost records, should match the target margin behind your Net Margin floor. If it falls short, the cost inputs are probably out of date.

• Private label sellers: your share of the Buy Box on ASINs where you are the only authorised seller should be close to 100%. If it is not, check the filter. A falling average selling price after it is on suggests a legitimate seller is below your brand price, which needs a different response.

Key Takeaways

• Each seller type needs one change. Arbitrage: a velocity threshold. Wholesale: a Net Margin floor. Private label: a competitive set filter and a maximum price.

• A blanket floor ages. A Net Margin floor is a formula, and it is only as accurate as its inputs.

• When costs rise, the floor rises by more than the cost. Recalculate before the next sale, then raise prices in small steps.

• A small margin buffer buys you time before the next cost change.

• The metric that confirms the fix differs by seller type. Check it at day 30.

Action Plan

1. Identify your seller type, or your main one if you sell across several.

2. Check for the wrong strategy: slow ASINs held at competitive prices (arbitrage), a typed floor with no cost inputs behind it (wholesale), or no minimum feedback filter (private label).

3. Make the single configuration change for your seller type.

4. Recalculate the floor for your top ASINs using current costs and the January 2026 FBA fees. Update any floor more than $0.25 below the correct minimum.

5. For your highest-advertising ASINs, add ad cost per unit (monthly ad spend ÷ monthly units sold) to the cost stack.

6. Run Safe Mode for at least 7 days after any change, then go live.

7. At day 30, pull the metric for your seller type and compare it with your baseline. Repeat the 10-point repricing audit quarterly.

Frequently Asked Questions

1. What is the best Amazon pricing strategy?

There is no single best Amazon pricing strategy, because the right one depends on your seller type. Arbitrage sellers need velocity-based repricing so slow stock does not sit in FBA collecting storage fees. Wholesale sellers need a Net Margin floor calculated from live cost inputs, not a minimum typed once at setup. Private label sellers need a competitive set filter that keeps unauthorised sellers out of the pricing calculation, plus a maximum price set at the brand's intended retail price.

2. How do I raise my Amazon price without losing the Buy Box?

Raise the price in small steps instead of one jump, and check the competitive range first. Increase by $0.25 to $0.50 at a time, check your Buy Box share after each step, and hold where it starts to drop. If competitors are priced above your new floor, raising toward their level carries less risk than raising above them. If they are priced below it, the decision is commercial: accept lower share, accept a lower margin on that ASIN, or review whether it is worth selling at your current cost.

3. Does Repricer.com update my minimum price when my costs change?

Yes, if you use Net Margin Repricing, which is available on the Premium plan. The minimum is calculated from your cost inputs and target margin instead of being a typed number, so when you update an input such as landed cost, the minimum recalculates. Cost data can be entered by you or pulled from a connected ERP or inventory system. The floor is only as current as those inputs, so update them when you restock.

4. Why are Amazon seller margins under pressure in 2026?

Three forces are acting at once: higher FBA fulfilment fees from January 2026, rising advertising costs, and more low-cost competition. Amazon's January increase averaged $0.08 per unit, with rises of up to $0.51 in some tiers. Advertising is a real cost on every ad-attributed sale, and low-cost sellers have put pressure on prices in crowded categories.

5. Does repricing protect margins, or does it only lower prices?

A repricer protects margin when it has a floor built from your real costs and a maximum price, and it only lowers prices when it has neither. The floor stops any sale below the cost-based minimum. Above the floor, the repricer can raise prices when competition thins, instead of always sitting at the lowest price. The impression that repricing only drives prices down comes from undercut rules with no floor or maximum price. That is a configuration problem.

Book a Demo to configure the right repricing strategy for your seller type, with Net Margin Repricing keeping your floor in step with your costs.