Most sellers live by ACoS. It’s the number Amazon puts in front of you, and it answers a fair question: for every dollar of ad sales, how much did the ads cost?

But it only looks at sales that came from ads. It says nothing about the rest of your business: the organic sales your ads helped earn, or how much of your revenue depends on ad spend at all. That’s what TACoS is for.

What TACoS means

TACoS stands for Total Advertising Cost of Sale. It’s your ad spend divided by all of your sales, ads and organic together.

In that example the ads look expensive on their own (25% ACoS), but they’re a small cost for the business as a whole (10% TACoS), because most sales arrive without an ad click.

ACoS and TACoS can tell different stories

Here are three established products from our own account, over the same 30 days:

If you only looked at ACoS, Product E would be the one to worry about: it has the highest of the three. But TACoS shows the opposite. Only 16% of Product E’s sales come from ads. The other 84% come in organically, so its ad spend is just 3% of everything it sells.

Product C is the reverse. It has the best ACoS, but ads drive 45% of its sales. If its ads stopped, it would lose far more of its business than Product E would. ACoS grades the ads. TACoS grades how much the product depends on them. You need both.

What’s a good TACoS?

There’s no single right number, because it depends on your margin and on where the product is in its life. The most useful line to draw is this:

If your TACoS is higher than your profit margin before ads, the product as a whole is losing money. A product that keeps 30% of each sale before ad costs can’t run a 35% TACoS for long.

Beyond that, think in stages:

• Launch: TACoS is high, often above your margin. That’s a planned loss: you’re paying for the sales history that rank is built on. Decide in advance how long you’ll accept it.

• Growth: TACoS should be falling month over month as organic sales pick up. If it isn’t falling, the launch isn’t turning into rank.

• Established: TACoS sits well under your margin. Our three established products above run between 3% and 7%.

A falling TACoS is usually a good sign, but check why it’s falling. If you cut ad spend and total sales dropped with it, TACoS improves while the business shrinks. The good version is total sales holding up or rising while ad spend stays the same or comes down.

How to lower TACoS without losing sales

Cutting ad spend across the board will lower TACoS, but it usually takes sales with it. These moves lower it the right way:

1. Cut the spend that never sells. Search terms with plenty of clicks and no orders are pure TACoS. Give each one a fair number of clicks first (here’s how many clicks to give a keyword), then block the losers with negative keywords.

2. Move budget to the products that earn it. A product that converts well and already ranks needs less help. A product that converts poorly will drag your TACoS up no matter what you bid. More on putting budget behind the right products, not the wrong ones.

3. Check where your ads show. The same keyword can be efficient at the top of search and expensive on product pages. Your placement mix moves TACoS more than most sellers expect.

4. Let organic sales do more of the work. TACoS falls fastest when organic sales grow. That comes from rank, and rank comes from steady sales on the searches that matter, which is what your ads should be buying in the first place.

Three TACoS mistakes we see often

• Judging a product by ACoS alone. Product E above would look like the problem child. It’s actually the healthiest of the three.

• Celebrating a TACoS drop without checking total sales. If sales fell too, you didn’t get more efficient. You got smaller.

• Comparing TACoS across very different products. A new launch and a five-year-old bestseller shouldn’t hit the same number. Compare each product with its own trend.

How to set this up in Pulse Pilot

Pulse Pilot runs your Amazon ads two ways: Autopilot, which runs them hands-off toward your goal, or Pilot, your own sandbox for building rules.

• See TACoS by product. Each product shows its ad spend, ad sales, ACoS and TACoS side by side, so you can see which products lean on ads and which don’t. TACoS counts all sales, organic included, from your connected Seller Central account.

• Find the spend that never sells. Filter your search terms to the ones with clicks and no orders, and block them in a couple of clicks.

• Run it on Amazon’s hourly data, on Autopilot or with your own rules in Pilot. The AI never sets a bid, and every change is logged with the reason.