I built Liquiproof into a brand that hit number one bestseller on Amazon four times, alongside distribution into Adidas, IKEA, Selfridges and Burberry. Amazon was never the side channel. It was where a huge amount of the volume actually lived, and it is where I watched the most money get wasted on a metric that looks great in a screenshot and means almost nothing on its own.
That metric is ACOS. Every seller chases it. Almost nobody tracks the number that actually shows whether Amazon advertising is building a business or just renting one month of revenue at a time. This is the framework I use instead, the 2026 benchmarks that matter, and the five mistakes that quietly waste a third of most brands' ad budget.
ACOS Tells You One Thing. TACOS Tells You Everything Else.
ACOS (Advertising Cost of Sale) measures your ad spend against the sales your ads directly drove. It is a campaign-level efficiency number, and it is useful for exactly that: deciding whether a specific keyword or campaign is pulling its weight.
TACOS (Total Advertising Cost of Sale) measures your ad spend against your entire Amazon revenue, organic sales included. This is the number that tells you whether advertising is building your business or propping it up. If your TACOS stays flat or climbs while your organic rank should be improving, your ads are not creating a self-sustaining listing. They are a life support machine you are paying for every single day.
A brand can hit its ACOS target every single week and still be losing money on Amazon overall, because ACOS never asks the one question that decides whether the channel is actually working: is my organic base growing, or am I just buying the same sales rank every month.
2026 Benchmarks By Lifecycle Stage
There is no single healthy ACOS or TACOS number. The right target depends on where your listing sits in its lifecycle and what your margin structure can absorb.
Launch Phase
Target TACOS: 25-40%
A new listing has no organic rank and no review base, so advertising is doing the work reviews and rank will eventually do for free. Running 25 to 40% TACOS at this stage is normal and expected, provided your margin can absorb it and you have a clear plan to bring it down as reviews and rank build.
Growth Phase
Target TACOS: 15-25%
Once you have a review base and some organic rank, TACOS should be trending down month over month. If it is not moving, the account is running on autopilot rather than being managed toward a declining cost of growth.
Mature Listing
Target TACOS: 10-15%
An established brand with a solid organic base should sit around 10 to 15% TACOS on a composite basis. Advertising at this stage exists to defend branded terms, capture category conquest volume, and launch new SKUs, not to prop up a listing that should be able to hold rank on its own.
CPG and Consumables
ACOS management over CPC management
CPG brands typically pay the lowest cost per click of any category, but they also carry the smallest margin per unit. That combination means ACOS discipline matters more than chasing a cheaper click. A brand with 60% gross margin can absorb a CPC spike far more comfortably than a CPG brand running 25% margin on a 12 GBP consumable.
The 5 Mistakes Wasting Your Amazon Ad Spend
Most unaudited Amazon accounts waste 20 to 30% of ad budget on clicks that never convert. That waste hides in plain sight because Amazon Ads reporting is built to make an account look active, not to make it obvious where the money is leaking.
Lumping every product into one campaign
A single campaign covering your whole catalogue means your budget flows to whichever product happens to be cheapest to advertise that week, not the products with the best margin or the most inventory to move. Structure campaigns by ASIN or tight product groups so budget decisions are deliberate, not accidental.
Relying only on broad match keywords
Broad match casts the widest net and burns the most budget on irrelevant searches. Pair broad match discovery campaigns with exact and phrase match campaigns for your proven converters, and move budget toward whichever match type is actually producing sales, not just impressions.
Never adding negative keywords
Every week without a negative keyword review is a week of paying for clicks you already know do not convert. A basic negative keyword pass, done monthly, is one of the highest-leverage 30 minutes you can spend on an Amazon account.
Set-and-forget budgets
Budgets set once at launch and never revisited do not account for seasonality, competitor bidding pressure, or your own inventory position. An account reviewed weekly against contribution margin per ASIN catches budget misallocation before it compounds into months of wasted spend.
Treating Amazon as an island
Amazon conversion rates run 13 to 15% against 2 to 4% on Google, largely because your DTC content, email list, and retargeting have already done the work of building trust before the shopper searches on Amazon. Brands that share creative, pricing logic, and promotional timing across Amazon and their own site consistently outperform brands running the two channels as competitors for the same customer.
Building A Retail Media Operating System, Not A Bidding War
The retail media market is now worth more than 101 billion dollars and growing at roughly 28% a year, which means the brands still treating PPC as a keyword bidding exercise are competing against brands who have already moved on. In 2026, Amazon advertising that actually works pulls together campaign structure, contribution margin per ASIN, inventory position, organic rank, creative, pricing, and lifecycle stage into one system, not seven separate spreadsheets.
Two campaign types do most of the work in that system. Brand defense campaigns protect your own branded search terms from competitors trying to poach your traffic, and should run lean, around 5 to 10% ACOS. Category conquest campaigns chase new-to-brand customers on competitor and category terms, and can justify a much higher ACOS, 25 to 40%, provided those new customers convert into repeat buyers who make the acquisition cost worth it over their lifetime, not just their first order.
What This Looks Like in Practice
A wellness brand I reviewed was running a single Amazon campaign covering eleven SKUs, bidding almost exclusively on branded terms, with no negative keyword list touched in over a year. Their ACOS looked reasonable at 24%. Their TACOS, once we pulled organic sales into the picture, was 41% and climbing, meaning advertising was carrying a growing share of total revenue rather than a shrinking one.
We split the catalogue into three campaign groups by contribution margin, added a negative keyword list, and shifted 30% of spend from branded defense into category conquest terms with a clear new-customer intent. Within one quarter, TACOS dropped to 19% while total Amazon revenue grew, because the account finally had a system deciding where every pound went instead of a single campaign absorbing whatever was left.
Inside the system
How we build this for brands
For portfolio brands, we run profit and cash-flow dashboards built from live Shopify and ad account data, with a reporting layer that surfaces margin leakage weekly rather than at month end. For an Amazon-heavy brand, that means TACOS and contribution margin per ASIN sit next to Shopify and Klaviyo numbers on the same screen, not buried in a separate seller account nobody checks until quarter close.
The lifecycle flows that turn Amazon customers into repeat DTC buyers, and vice versa, are built and deployed in Klaviyo as part of the same engagement, so the two channels reinforce each other instead of competing for the same shopper. Part of this runs live for portfolio brands today; the full system is what we deploy when we take a brand on.
Amazon Growth Audit
Find Out What Your Amazon Ad Spend Is Actually Buying You
I'll review your ACOS, your TACOS, and your contribution margin per ASIN, then show you exactly where your Amazon budget is working and where it is quietly funding someone else's rank.
Book Your Amazon AuditFrequently asked questions
What is the difference between ACOS and TACOS on Amazon?
ACOS measures ad spend against ad-attributed sales only. TACOS measures ad spend against your total Amazon sales, including organic. ACOS tells you if a campaign is efficient. TACOS tells you whether advertising is building your business or renting one month of revenue at a time.
What is a good ACOS for Amazon ads in 2026?
Average ACOS in 2026 sits around 30 to 32%, with top-performing accounts running 23 to 26%. A brand defense campaign should run 5 to 10% ACOS. A category conquest campaign chasing new-to-brand buyers can justify 25 to 40% if those customers repeat purchase.
What is a healthy TACOS for an Amazon seller?
For an established brand with a solid organic base, a healthy TACOS sits around 10 to 15%. Launch-phase brands will run 25 to 40% TACOS, which is fine if margin supports it and the number is trending down as organic rank improves.
Why do most DTC brands waste money on Amazon PPC?
The most common mistakes are lumping every product into one campaign, relying only on broad match keywords, never adding negative keywords, setting budgets once and never revisiting them, and treating Amazon as disconnected from Shopify and email. Most accounts waste 20 to 30% of budget on clicks that never convert.
Should DTC brands treat Amazon and Shopify as separate businesses?
No. Amazon conversion rates run 13 to 15% against 2 to 4% on Google, largely because your own site, content, and email have already built trust before the shopper searches on Amazon. Brands sharing creative, pricing, and promotional timing across both channels consistently outperform brands running them as silos.
How much of my Amazon ad budget is typically wasted on non-converting clicks?
Most unaudited accounts waste 20 to 30% of spend on clicks that never convert, usually from redundant keywords, overlapping targeting, and missing negative keyword lists. A proper audit that fixes these typically recovers a meaningful share of that waste within the first billing cycle.
About the author
Caner Veli built Liquiproof from zero to 3,000+ global retailers in under 6 years, then exited profitably. He now helps DTC and CPG brands fix broken growth engines. In the last 90 days, he 10x'd monthly revenue in his own business.