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Amazon TACoS Profit Simulator — See What Your Ad Spend Really Costs

ACoS tells you about your ads; TACoS tells you about your business. Enter your revenue, costs, and ad spend to simulate profit at three spend levels — and find your break-even TACoS.

Free forever No signup Private — runs in your browser
  • Free forever
  • No signup
  • 3 scenarios side by side
  • Break-even TACoS included
Free

TACoS Profit Simulator

Enter your revenue, ad spend, and product costs to compare three spend scenarios side by side: TACoS, estimated profit, and profit margin after ads — plus your break-even TACoS. It's straightforward math on your own numbers, so you can see the profit trade-off of spending more or less instead of guessing.

Held constant across all three scenarios so you can compare spends like-for-like.
Your margin before ad spend — the break-even TACoS equals this number.

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Why is TACoS a better number than ACoS?

ACoS only sees your advertising: spend divided by ad sales. But ads also lift organic rank and total sales — ACoS punishes you for that halo effect. TACoS (spend divided by total sales) shows what advertising really costs your whole business.

That's why profit decisions belong to TACoS. A campaign with “bad” ACoS can be wildly profitable if it's driving organic growth, and a “good” ACoS can hide a shrinking business. Simulate both before you cut or scale.

Also free: ACoS / TACoS Calculator · FBA Profitability Calculator · Break-Even ROAS Calculator

How does the TACoS profit simulator work?

Your numbers in, three scenarios out:

  1. Enter your total revenue, ad spend, and product costs.
  2. The simulator calculates your current TACoS, estimated profit, and margin after ads.
  3. Compare two more spend scenarios side by side to see the profit trade-off.
  4. Note your break-even TACoS — the line where ads stop paying for themselves.

Watch how it works

Pro tips for reading TACoS scenarios

1. Your break-even TACoS is your gross margin. The reference row makes this explicit: if your margin is 35%, ad spend at 35% TACoS wipes it out entirely. Any scenario above that line is burning profit, not building it.

2. Compare realistic spends, not fantasy ones. Run your current spend, a +50% version, and a doubled version. The verdict highlights the highest-profit scenario — usually the middle one, where incremental sales still outrun incremental spend.

3. Remember what the model holds constant. Revenue is fixed across all three scenarios, so this is a scenario estimator, not a forecast. Real spend changes move sales too — re-run the simulator with actuals after any big budget change.

4. Treat negative profit as a hard stop. A scenario flagged with negative estimated profit spends more than its gross margin can support. Check that scenario's TACoS against the break-even row before approving the budget.

TACoS Profit Simulator FAQs

Yes — free forever, no signup. Run as many scenarios as you like.
ACoS is ad spend divided by ad-attributed sales — it only sees your advertising. TACoS is ad spend divided by total sales, including organic. TACoS tells you what advertising really costs your whole business, which is why it's the better number for profit decisions.
It depends on your margins — there is no universal good number. A useful rule: your break-even TACoS roughly equals your profit margin percentage. The simulator shows your break-even point so you can judge your own number honestly.
Not always. During a launch or growth push, a higher TACoS can be the right call if total profit is climbing. The simulator lets you compare scenarios side by side so you can see the profit trade-off instead of guessing.
Straightforward arithmetic on your inputs: revenue, ad spend, and product costs. It projects profit and margin after ads at different spend levels — no hidden assumptions, and you can see every number.
Only what you type in. Nothing connects to Amazon or leaves your browser — enter your own revenue and cost figures for a simulation that reflects your business.
Three: ad spend, ad-attributed sales, and total sales (or organic sales — the simulator derives the rest). TACOS is simply ad spend divided by total sales, so with those inputs you can model how changes in spend or organic lift move the ratio.
ACoS only judges the ads themselves — spend versus ad sales. TACOS relates ad spend to your entire revenue, so it shows whether advertising is growing the business or just shifting sales around. A rising TACOS means ads are eating a bigger share of total revenue, even if ACoS looks stable.

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