You’re ready to sell. Or maybe you’re just curious about what your business is worth. Either way, you need to know the valuation formula for your specific platform—because Shopify and Amazon FBA are valued differently, and using the wrong formula produces wildly inaccurate results.
This guide walks through both formulas step by step, with worked examples you can apply to your own business today.
Value Your Business With the Right Formula
The Core Difference
Shopify and Amazon FBA businesses look similar from the outside—both sell products online. But from a valuation perspective, they’re fundamentally different assets.
A Shopify store is a brand asset. Buyers acquire your customer list, email subscribers, content library, and brand equity. These assets continue producing revenue after the sale because customers know and trust your brand—not a marketplace.
An Amazon FBA business is a cash flow asset with inventory. Buyers acquire your product rankings, reviews, and stock in Amazon’s warehouses. But they don’t acquire customer relationships—Amazon owns those. The revenue depends on Amazon’s continued goodwill.
This core difference drives everything else: formula choice, multiple range, and inventory treatment.
Shopify Valuation Formula
Shopify stores use the SDE Multiple Method:
Shopify Value = Annual SDE x Multiple (2.5x – 3.5x)
Step 1: Calculate Annual SDE
- Start with Net Profit from your P&L
- Add Owner Salary (what you pay yourself)
- Add Personal Expenses (phone, vehicle, insurance through the business)
- Add One-Time Costs (development, design, legal)
- Total = Annual SDE
Need help with this calculation? Our complete SDE guide walks through it line by line.
Step 2: Determine Your Multiple
Start at 2.5x. Adjust based on five factors:
- Growth 20%+ YoY: +0.3x
- Traffic diversified 3+ channels: +0.3x
- Owner hours under 10 weekly: +0.2x
- Store age 36+ months: +0.2x
- Stable margins 25%+: +0.2x
Step 3: Multiply. Annual SDE x Adjusted Multiple = Store Value.
Amazon FBA Valuation Formula
FBA businesses use a modified formula:
FBA Value = (Annual Net Profit x Multiple 2.0x – 3.0x) + Inventory Value
Step 1: Calculate Annual Net Profit
- Total FBA Revenue
- – Cost of Goods Sold
- – Amazon Fees (referral, FBA, storage)
- – Advertising (PPC)
- – Other Operating Expenses
- = Annual Net Profit
Step 2: Determine Your Multiple
Start at 2.0x. Adjust:
- Stable product rankings 12+ months: +0.2x
- 1,000+ reviews with 4.5+ rating: +0.2x
- Diversified product catalog (10+ SKUs): +0.2x
- Account age 3+ years: +0.1x
- Crowded niche competition: -0.2x
Step 3: Add Inventory Value
- FBA inventory: 70-100% of cost
- Based on age, salability, and turnover rate
Step 4: Multiply and Add. (Net Profit x Multiple) + Inventory = FBA Business Value.
Side-by-Side Comparison Table
| Component | Shopify | Amazon FBA |
|---|---|---|
| Earnings Metric | SDE (with add-backs) | Net Profit (fewer add-backs) |
| Multiple Range | 2.5x – 3.5x | 2.0x – 3.0x |
| Inventory | Separate sale | Included at 70-100% of cost |
| Add-Backs | Owner salary, personal expenses, one-time costs | Minimal (rarely owner salary) |
| Key Assets | Email list, content, brand | Rankings, reviews, inventory |
Which Sells for More?
Here’s a worked example comparing identical businesses on each platform:
Scenario: $500,000 Annual Revenue, 25% Margin
Shopify Store:
- Annual SDE: $125,000 (includes add-backs)
- Multiple: 3.0x (strong factors)
- Store Value: $375,000
Amazon FBA:
- Annual Net Profit: $100,000 (Amazon fees reduce margin)
- Multiple: 2.5x (moderate factors)
- Business Value: $250,000
- Plus Inventory: $40,000 (70% of $57,000 cost)
- Total Value: $290,000
In this scenario, the Shopify store sells for $85,000 more. The higher multiple and add-back inclusion outweigh FBA’s inventory advantage.
But change the scenario: If the FBA business has $100,000 in inventory (heavy stock), total value becomes $350,000—closing the gap significantly.
Hybrid Models
Running both platforms? Value each separately, then combine:
Step 1: Calculate Shopify SDE. Apply 2.5x-3.5x. Record value.
Step 2: Calculate FBA net profit. Apply 2.0x-3.0x. Add inventory. Record value.
Step 3: Add shared assets once (email list, content library, brand).
Step 4: Sum all components. This is your total business value.
Hybrid businesses often command a slight premium because they demonstrate channel diversification—reducing platform risk for the buyer.
2026 Market Data
Current market benchmarks:
- Shopify: 2.5x-3.5x SDE is the standard range. Premium stores with diversified traffic and strong brands reach 3.5x-4.0x.
- Amazon FBA: 2.0x-3.0x net profit is standard. Strong brands with 1,000+ reviews reach 3.0x-3.5x.
- Hybrid: Blended 2.3x-3.3x depending on platform split.
- Trend: The gap is narrowing as FBA sellers build brands and diversify off Amazon.
Frequently Asked Questions
Can I use the Shopify formula for my FBA business?
No. FBA businesses have fewer add-backs and face different risk factors. Applying the Shopify multiple (2.5x-3.5x) to FBA net profit produces an inflated number that won’t survive buyer scrutiny. Use the right formula for your platform.
Why does FBA use net profit instead of SDE?
FBA businesses typically don’t have significant owner salaries or personal expenses. The owner often isn’t drawing a salary—they’re taking distributions. Since add-backs are minimal, net profit is a cleaner metric that buyers can verify more easily.
How do I value inventory for an FBA sale?
FBA inventory in Amazon’s warehouses: 70-100% of cost, depending on age and turnover. Inventory older than 180 days gets discounted heavily. Dead inventory gets valued near zero.
Can I include email list value in an FBA valuation?
Only if you actually have an email list. Most FBA businesses don’t—Amazon doesn’t share customer emails. If you’ve built an off-Amazon list through inserts or other means, it’s a separate asset you can include. Otherwise, it doesn’t apply.
Should I use a broker for platform-specific valuation?
A broker with experience in both platforms can apply the correct formula and benchmark against comparable sales. For businesses over $100K, this often justifies the commission. See our broker guide.
Value Your Business With the Right Formula