Amazon Seller Profit Calculator Excel: How to Track Real Profits (Not Just Revenue)
8 min read
Last month, SKU B07X looked like a winner. You sold 500 units at $29.99 each. Revenue? $14,995. But after Amazon’s 15% referral fee ($2,249.25), FBA fees ($1,500), and ads ($1,800), you were left with $9,445.75. That’s a 35% margin—until you factored in the 5% refund rate ($749.75) and the $500 in shipping costs you missed in your initial spreadsheet. Suddenly, your margin dropped to 22%.
This isn’t a hypothetical. It’s what happened to us. And it’s why we stopped trusting Excel for profit tracking. But if you’re not ready to switch to a dedicated tool like Gomarginify, here’s how to build a reliable Amazon seller profit calculator in Excel.
Why Your Current Profit Tracking Is Wrong
You’re not tracking all costs. Most sellers only account for Amazon fees and product costs. But real profit includes refunds, shipping, ads, and even currency conversion if you’re cross-border. Last quarter, we found 12% of our SKUs were unprofitable because we missed these costs.
Excel is error-prone. Manual data entry means typos, missed updates, and outdated formulas. One wrong cell reference can throw off your entire profit report. We’ve seen sellers lose thousands because a single formula didn’t account for a 3% increase in FBA fees.
How to Build an Amazon Seller Profit Calculator in Excel
You’ll need to track revenue, costs, and profit per SKU. The goal? A daily profit report that updates automatically. Here’s how to set it up.
Why We Switched to Gomarginify
After months of manual tracking, we switched to Gomarginify. It connects to Amazon, Shopify, and 8 other marketplaces. It automatically calculates true net profit—revenue minus product cost, platform fees, shipping, ads, and refunds. No more missing costs. No more manual updates.
The best part? Daily profit reports via email or IM (Lark, Slack, Telegram). No more waiting until month-end to see if you’re profitable. If a SKU is losing money, you know immediately.
Step by step
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Step 1: Set Up Your Revenue Tracker
Create a sheet for each marketplace (Amazon, Shopify, etc.). List SKUs in Column A, units sold in Column B, and price per unit in Column C. Multiply B and C for revenue. Example: SKU B07X sold 500 units at $29.99 = $14,995 revenue.
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Step 2: Track All Costs
Add columns for Amazon fees (15% referral fee), FBA fees ($3.20 per unit), ads ($1,800 total), refunds (5% of revenue), and shipping ($500). Sum these costs for each SKU. For B07X: $2,249.25 (referral) + $1,500 (FBA) + $1,800 (ads) + $749.75 (refunds) + $500 (shipping) = $6,799.00 total costs.
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Step 3: Calculate Net Profit
Subtract total costs from revenue. For B07X: $14,995 - $6,799 = $8,196. But wait—this doesn’t account for product cost. Subtract that too. If your product cost is $5,000, your true net profit is $3,196. That’s a 21% margin, not the 35% you thought.
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Step 4: Automate with Formulas
Use Excel’s SUM, VLOOKUP, and IF functions to automate calculations. For example, =SUM(B2:C2) for revenue, =SUM(D2:H2) for costs, and =I2-J2 for net profit. Set up a dashboard sheet to pull data from all SKUs. This will give you a daily profit report.
FAQ
Can I use this method for other marketplaces like Shopify or TikTok Shop?
Yes, but you’ll need to adjust for their fee structures. Shopify takes 2% + $0.30 per transaction, while TikTok Shop has a 1%–5% referral fee. Track these separately.
How often should I update my profit tracker?
Daily. Profits can change with refunds, price changes, or unexpected fees. We update ours every morning to catch issues early.
What’s the biggest mistake sellers make when tracking profit?
Ignoring refunds and shipping costs. These can eat into margins fast. One of our SKUs lost 12% margin last month because we didn’t account for a spike in refunds.
Track your real profit across every marketplace
Learn how to build an Amazon seller profit calculator in Excel. Stop guessing your margins. Get exact profit numbers with this step-by-step guide.
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