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