Many Amazon sellers expand into multiple marketplaces expecting a clearer view of what is working and where to invest next.
But there is a hidden profitability trap that often goes unnoticed:
Shared costs can make one marketplace appear far more profitable than it actually is.
If indirect expenses aren’t allocated correctly, your reports may tell a very different story from reality.
The Marketplace Profitability Illusion
Imagine you sell on:
- Amazon.com
- Amazon.ca
- Amazon.com.mx
Your sales and Amazon fees are tracked correctly. Advertising costs are assigned properly. Product costs are up to date.
Everything looks great.
Then you review profitability by marketplace and discover:
| Marketplace | Reported Profit |
| Amazon.com | $15,000 |
| Amazon.ca | $3,000 |
| Amazon.com.mx | $2,000 |
Based on this data, Amazon.com appears to be the clear winner.
But there’s a problem.
The report doesn’t include many of the costs that keep the business running.
The Expenses That Often Get Ignored
Most sellers have operational expenses that support the entire business, not just one marketplace:
- Software subscriptions
- Accounting services
- Virtual assistants
- Agencies and freelancers
- Inventory management tools
- Product research software
- Compliance services
- Trademark and legal costs
- Office expenses
- Business insurance
These are commonly called indirect expenses or overhead costs.
Unlike Amazon fees or PPC spend, these expenses are not automatically tied to a specific order or product.
The challenge is determining where they belong.
What Happens When Shared Costs Are Assigned Incorrectly?
Many sellers fall into one of three common patterns.
Scenario 1: Costs Are Assigned to Only One Marketplace
Suppose you pay:
- $2,000/month for agency services
- $500/month for software subscriptions
- $1,000/month for a virtual assistant
Total shared overhead: $3,500/month
If all of those costs are assigned only to Amazon.com, then:
- Amazon.com looks less profitable than it really is.
- Canada and Mexico look more profitable than they really are.
The profitability comparison becomes distorted.
Scenario 2: Costs Are Not Entered at All
This is even more common.
A seller tracks:
- Revenue
- Amazon fees
- PPC
- COGS
But leaves out operational overhead completely.
The result?
They may believe they are generating a 20% net margin when the true number is closer to 12%.
The business appears healthier than it actually is.
Scenario 3: Costs Are Duplicated Across Marketplaces
To solve the problem, some sellers manually create the same expense multiple times.
For example:
- Agency fee on Amazon.com
- Agency fee on Amazon.ca
- Agency fee on Amazon.com.mx
This creates additional work and increases the chance of:
- Double counting
- Inconsistent allocations
- Reporting errors
- Forgotten updates
As the number of marketplaces grows, the process becomes increasingly difficult to manage.
Why This Matters More Than Ever
Today’s Amazon environment leaves little room for inaccurate profitability data.
Margins are under pressure from:
- Rising Amazon fees
- Storage costs
- Advertising competition
- Freight expenses
- Tariffs and compliance costs
When margins shrink, indirect expenses become a larger percentage of total profit.
A marketplace that appears profitable on paper may actually be barely breaking even once shared overhead is considered.
This can lead to poor decisions such as:
- Scaling the wrong marketplace
- Increasing inventory in underperforming regions
- Misallocating advertising budgets
- Delaying necessary cost reductions
True Profitability Requires Full Cost Visibility
The goal isn’t simply to track revenue.
The goal is to understand:
“After all costs are considered, which marketplace is actually generating profit?”
That requires visibility into both:
Direct Costs
- Amazon fees
- PPC spend
- Refunds
- Product costs
- Shipping costs
Indirect Costs
- Software subscriptions
- Staff salaries
- Agencies
- Accounting services
- General business overhead
Only when both categories are included can you accurately compare marketplace performance.
How sellerboard Helps
sellerboard helps sellers track both direct and indirect expenses so profitability reports reflect the true financial performance of the business.
With sellerboard, you can:
- Track recurring and one-time overhead expenses
- Include indirect expenses in profitability calculations
- Analyze profitability by marketplace
- Keep expense data organized and consistent
For sellers operating in multiple marketplaces, sellerboard now makes shared expense allocation even easier.
Assign One Indirect Expense to Multiple Marketplaces
Many indirect costs are shared across marketplaces, including:
- Software subscriptions
- Agency fees
- Freelancer costs
- Virtual assistants
- Accounting services
- Other operational overhead
Instead of creating duplicate expense entries, sellerboard allows you to assign a single indirect expense to multiple marketplaces at once.
This means:
- No duplicate entries
- Cleaner expense management
- Consistent cost allocation
- More accurate profitability reporting
- Less administrative work
As your business expands internationally, maintaining accurate profitability data becomes much simpler.
The Bottom Line
A marketplace can look highly profitable simply because shared costs are hidden somewhere else—or not tracked at all.
When indirect expenses aren’t allocated correctly, profitability reports can become misleading, causing sellers to invest time, inventory, and advertising budgets based on incomplete information.
The sellers who make the best decisions are not necessarily the ones with the highest sales.
They’re the ones who understand their true profit after every cost is accounted for.
By tracking indirect expenses and allocating shared costs consistently across marketplaces, sellerboard helps sellers move beyond surface-level revenue numbers and gain a more accurate picture of business performance.
