What is TACOS?
Total Advertising Cost of Sales — ad spend divided by TOTAL revenue, not just ad-attributed.
TACOS stands for Total Advertising Cost of Sales: your total ad spend divided by your total revenue, not just the revenue your ads directly generated. The TACOS formula is simply ad spend / total sales, expressed as a percentage. It is the metric that tells you what advertising costs your business as a whole, which is exactly what ACOS hides. If you only ever look at ACOS, you can be quietly bleeding profit while your dashboard looks fine.
The difference between TACOS and ACOS is the denominator. ACOS divides ad spend by ad-attributed sales only, so it measures campaign efficiency in isolation. TACOS amazon measures the same spend against everything you sold, including organic orders. That makes TACOS the better lens for whether advertising is building a healthy business or just renting sales you would struggle to keep.
TACOS vs ACOS: what each one actually measures
ACOS answers a narrow question: of the sales my ads directly drove, how much did I spend to drive them? It is useful for tuning individual campaigns. But ACOS ignores the organic sales your advertising helps create, so a product can have a scary ACOS and still be wildly profitable overall, or a comfortable ACOS while total ad spend quietly eats the business.
TACOS zooms out. By dividing ad spend by total revenue, it captures the relationship between advertising and the whole business. A falling TACOS over time usually means advertising is doing its real job: lifting organic rank so you sell more without paying for every order. A rising TACOS means you are increasingly dependent on paid traffic, which is a warning sign even if ACOS looks fine.
- •ACOS = ad spend / ad-attributed sales (campaign efficiency)
- •TACOS = ad spend / total sales (whole-business ad load)
- •Low and falling TACOS = ads are building durable organic rank
- •High or rising TACOS = the business leans on paid traffic to hold sales
- •Use ACOS to tune campaigns, TACOS to judge overall ad health
How to calculate TACOS
The TACOS calculation is: total advertising spend for the period divided by total revenue for the same period, times 100. If you spent $2,000 on ads and did $20,000 in total sales, your TACOS is 10 percent. Total revenue here means everything, both ad-attributed and organic, so you are measuring ad spend against the full top line.
The practical sticking point is getting clean numbers. Total revenue should be net of refunds for an honest figure, and your ad spend should cover all ad types you run, not just one campaign. Because TACOS blends paid and organic, it is best tracked at the product or brand level over time rather than read as a single snapshot.
Why TACOS belongs on your P&L, not just your ad dashboard
Advertising on Amazon is a real cost of doing business, and TACOS is the cleanest way to express it as a percentage of revenue on your profit-and-loss statement. Treat it as a line item alongside referral fees and FBA fees, and you can see the full cost stack between gross margin and net profit. A product with a healthy gross margin can still finish unprofitable once a high TACOS is layered in.
This is where TACOS connects to true margin. Your real net margin is roughly gross margin minus Amazon's fees minus TACOS minus overhead. If you only watch ACOS, you never see advertising's full drag on the business. Tracking TACOS against gross margin tells you, at a glance, how much room advertising is leaving for actual profit.
What a healthy TACOS looks like (and why it changes)
There is no universal target, because the right TACOS depends on your margin, your stage, and your goal. A new product launch often runs a high TACOS deliberately, spending aggressively to build rank and reviews, and accepting thin or negative short-term profit. A mature, well-ranked product should run a much lower TACOS because organic sales carry more of the load.
The signal to watch is the trend. As a launch matures, TACOS should fall as organic momentum builds. If it stays high or climbs on an established product, advertising is propping up sales that are not sticking, and your net margin is quietly eroding. Pair TACOS with gross margin and you can decide whether to keep spending or pull back.
Frequently asked questions
- What is TACOS in advertising?
- TACOS, or Total Advertising Cost of Sales, is your total ad spend divided by your total revenue, including organic sales. It measures advertising's load on the entire business, unlike ACOS, which only looks at ad-attributed sales.
- What is the difference between ACOS and TACOS?
- ACOS divides ad spend by ad-attributed sales and measures campaign efficiency. TACOS divides the same spend by total sales and measures advertising's impact on the whole business. ACOS is for tuning campaigns; TACOS is for judging overall ad health and profitability.
- How do you calculate TACOS?
- TACOS = total ad spend ÷ total revenue × 100, over the same period. For example, $2,000 in ad spend on $20,000 of total sales is a 10 percent TACOS. Use net revenue after refunds and include all ad types for an accurate figure.
- What is a good TACOS on Amazon?
- There's no fixed target — it depends on your margin and stage. New launches often run a high TACOS on purpose to build rank, while mature products should run lower as organic sales grow. The key signal is a falling trend over time on an established product.
- Why does TACOS matter more than ACOS for profit?
- Because TACOS captures advertising's drag on your entire top line, not just ad-driven orders. Treated as a P&L line item alongside fees, it shows how much room is left for net profit. ACOS can look fine while a high TACOS quietly erodes your margin.
Related terms
Go deeper
See what Amazon owes you — free
Connect your seller account and get a free reimbursement audit. No credit card, keep 100% of what you recover.