Amazon ACOS Calculator
Enter your sale price, product cost, and Amazon fees to instantly calculate your break-even ACOS and target ACOS — so you know exactly where your PPC becomes profitable.
Product & Ad Details
Typically 15% for most categories
Per unit (typical: $3.50–$6.10)
PPC Details
For context only
For monthly profit calc
ACOS Summary
Break-Even ACOS
46.7%
Target ACOS
32.7%
30% profit buffer
Cost Breakdown
Break-even ACOS = (Price − COGS − Amazon fees) ÷ Price × 100. Target ACOS adds a 30% profit buffer. Actual results depend on your specific fee structure and campaign performance.
Build the PPC strategy that stays inside it
Knowing your break-even ACOS is step one. LaunchFast helps you build the full PPC launch strategy — keyword targeting, bid logic, and campaign structure — so your ads drive rank without blowing your margin.
ACOS concepts every Amazon seller needs to know
Understanding the relationship between ACOS, break-even, and target profitability is the foundation of sustainable Amazon PPC.
What Is ACOS?
ACOS (Advertising Cost of Sale) is your ad spend divided by the revenue generated from those ads, expressed as a percentage. If you spend $15 in ads to generate $100 in sales, your ACOS is 15%. Lower ACOS means more efficient advertising.
Break-Even ACOS
Break-even ACOS is the highest ACOS you can run before your ads stop making money. It equals your profit margin after Amazon fees and COGS, expressed as a percentage of sale price. Any ACOS above this threshold means your ads are costing you money on net.
Target ACOS
Target ACOS is the ACOS you aim for to hit a specific profit goal. A common starting point is break-even ACOS × 0.7, which leaves a 30% profit buffer. This means your PPC ads are generating gross profit, not just breaking even.
ACOS vs. TACOS
ACOS only counts revenue attributed to ads. TACOS (Total ACOS) divides total ad spend by total revenue — including organic sales. TACOS is a better long-term health metric. As your organic rank grows, TACOS falls even if ACOS stays flat.
Tips to improve your ACOS
Getting your ACOS below break-even isn't just about lowering bids — it requires a systematic approach across listing quality, keyword targeting, and campaign structure.
Start with break-even, not a fixed percentage
Many sellers blindly target 15–20% ACOS. But your actual break-even depends on your margin. A product with 40% gross margin can sustain a much higher ACOS than one at 20%. Always calculate your specific break-even before setting campaign targets.
Segment campaigns by match type
Broad and phrase match keywords often drive higher ACOS early on. Isolate your best exact match keywords into separate campaigns where you can set tighter bids. This lets you aggressively explore while protecting your most profitable terms.
ACOS improves as organic rank rises
Early in a launch, you fund rank with ads, so ACOS is high. As your BSR improves and organic placement increases, the same ad spend generates more total sales — pulling your TACOS down. Evaluate ACOS trends over 30-day windows, not week-to-week.
Negative keywords are your biggest lever
Irrelevant clicks are pure waste. A single poorly converting search term can inflate your ACOS by 5–10 points. Review your search term report weekly during launch and add negatives aggressively. This often matters more than bid adjustments.
Frequently asked questions
What is a good ACOS for Amazon PPC?
A good ACOS depends on your profit margin, not a fixed number. A product with a 35% gross margin (after COGS and Amazon fees) can break even at 35% ACOS and profitably run ads up to that threshold. Most sellers target an ACOS of 15–25%, but this only makes sense if it's below their break-even. Calculate your break-even ACOS first, then set targets relative to it.
How is break-even ACOS calculated?
Break-even ACOS = (Sale Price − Product Cost − Amazon Fees) ÷ Sale Price × 100. Amazon fees include the referral fee (typically 15% of sale price) and the FBA fulfillment fee (a flat per-unit charge). The result is your margin as a percentage of revenue — and the highest ACOS where your ads neither gain nor lose money.
What is the difference between ACOS and TACOS?
ACOS (Advertising Cost of Sale) = ad spend ÷ ad-attributed revenue. It only counts sales directly tracked to your ads. TACOS (Total ACOS) = ad spend ÷ total store revenue, including organic sales. TACOS gives a better picture of your ad spend's impact on the overall business. As products rank organically, TACOS drops even if ACOS stays the same.
Should I optimize for ACOS or ROAS?
ACOS and ROAS are inverses of each other (ROAS = 1 ÷ ACOS expressed as a ratio). They convey the same information in different formats. ACOS is more common in the Amazon seller community and easier to compare against your margin percentage directly. Use whichever your ad reports surface more prominently — they will lead you to the same decisions.
Why is my ACOS high even though I have sales?
High ACOS is usually caused by one of three things: (1) bids are too high relative to conversion rate, driving up cost per click; (2) irrelevant search terms are generating clicks that don't convert; or (3) your listing is converting poorly — so you spend on clicks that don't become sales. Fix the listing first (images, title, bullets), then aggressively add negative keywords before lowering bids.