ROI Tracker Guide 2026: Track Amazon ROI & Multi-Channel Profit

Q: What is a good ROI for Amazon ads?

A 3-5x return on ad spend (ROAS) is healthy for most products; on inventory, aim for at least 2x return per inventory dollar over 90 days. ROI must always be measured against margin, not revenue.

Q: How do I calculate product ROI on Amazon?

ROI = (total profit - total investment) / total investment x 100. Include inventory cost, freight, fees, ads, and returns in the investment side, and subtract all fees from revenue.

Q: What is the difference between ROI and ROAS?

ROAS measures ad revenue per ad dollar (sales-focused). ROI measures net profit per total dollar invested (profit-focused). ROI is the business metric; ROAS is a campaign efficiency metric.

Q: Why is my Amazon ROI negative even with sales?

Usually because fees, storage, ads, or returns exceed margin — or inventory is turning too slowly. Re-model your per-unit economics and check for aged stock and high ACoS keywords.

Last updated: August 8, 2026

Sales are vanity, profit is sanity — and ROI is the number that tells you whether your inventory dollars are working. Many sellers confuse ROAS with ROI and celebrate "5x ad returns" while the business bleeds money because margins, storage, and returns eat everything. This guide separates the metrics, gives you the formulas that actually reflect profit, and shows how to track ROI across campaigns, products, and multiple sales channels in 2026.

1. ROI vs ROAS: The Metrics That Get Confused

Metric	Formula	Measures
ROAS	Ad revenue / ad spend	Ad efficiency (revenue-focused)
ROI (campaign)	(Profit from ads - ad spend) / ad spend	Ad profitability
ROI (product)	(Net profit - total investment) / total investment	Inventory profitability

A 5x ROAS with 15% margin after fees and 40% ACoS can still lose money. Always translate ad metrics into profit terms before deciding what to scale.

2. Product ROI Formula

ROI = (Net Profit − Total Investment) ÷ Total Investment × 100

Net Profit = revenue − COGS − all Amazon fees − ads − storage − returns.

Total Investment = inventory cost + freight + prep + any sunk costs.

Example (per 1,000 units)	Amount
Revenue (1000 x $25)	$25,000
COGS + freight	$9,000
Amazon fees + ads + storage + returns	$10,500
Net profit	$5,500
Investment	$9,000
ROI	5,500 / 9,000 = 61%

Healthy target: 50-100%+ ROI per inventory cycle (90 days). Below 30% means your money is barely working — improve margin or turns.

3. Inventory Turnover: ROI's Silent Multiplier

ROI compounds with turnover. Selling the same $9,000 investment twice a year at 60% ROI beats once at 120%:

1 cycle/year: 60% ROI → $5,400 profit
2 cycles/year: 60% ROI each → ~$11,000 cumulative profit

Prioritize fast-moving SKUs, cut slow movers — turnover amplifies everything.

4. Campaign-Level ROI Tracking

Export ad reports monthly; compute profit per campaign (revenue x margin % − ad spend).
Rank campaigns by profit, not revenue or ACoS.
Shift budget from low-profit to high-profit campaigns.
Kill campaigns negative for 3 consecutive months.

ACoS-only optimization misleads. Two campaigns at 25% ACoS can have very different profit if margins differ. Track campaign profit.

5. Multi-Channel ROI (Amazon + Temu + TikTok + eBay)

With sellers expanding to Temu and TikTok Shop, channel ROI must be tracked separately:

Different fee structures → different net margins per channel.
Shared inventory → allocate COGS proportionally.
Channel-specific ad platforms → separate campaign ROI.

Compare: Temu vs Amazon and TikTok Shop before allocating inventory.

6. Building a Simple ROI Dashboard

Column	Source
Units sold / revenue	Seller Central + channel reports
Fees	Payment reports
Ads	Ad console
COGS + freight	Your PO data
Net profit / ROI	Formula columns

7. Tools for ROI Tracking

ROI Calculator — quick campaign/product ROI math.
Profit Dashboard — catalog-level net margin trends.
FBA Profit Calculator Guide — per-unit economics inputs.

Frequently Asked Questions

What is a good ROI for Amazon ads?

3-5x ROAS is healthy; on inventory aim for 2x+ per dollar over 90 days. Measure against margin, not revenue.

How do I calculate product ROI on Amazon?

ROI = (net profit - total investment) / total investment x 100. Include inventory, freight, fees, ads, and returns.

What is the difference between ROI and ROAS?

ROAS = ad revenue per ad dollar; ROI = net profit per total dollar invested. ROI is the business metric.

How often should I review ROI?

Campaign ROI weekly, product ROI monthly, catalog ROI quarterly.

Why is my Amazon ROI negative even with sales?

Fees, storage, ads, or returns exceed margin — or inventory turns too slowly. Re-model unit economics.

Run the numbers free: ROI Calculator