Inventory POs
One record per purchase order with supplier, amount, SKU batch, and the attached PO.
Ecommerce finance · FBA expenses
Expense records for Amazon FBA sellers
An FBA business bleeds money in a dozen small streams — a $4,200 inventory PO to a supplier, monthly storage fees, per-unit fulfillment charges, a prep-center invoice, sample units you tested, and a daily PPC ad spend. Each lands in a different place at a different time, and tying them back to a SKU batch is where most sellers lose the thread. Cash Workspace gives you one place to record each FBA expense, attach its statement, and note the SKU batch it belongs to.
The problem
Why FBA expenses are hard to keep straight
FBA costs arrive across several systems — supplier invoices, Amazon fee statements, prep-service bills, ad reports — and none of them line up by date or by SKU on their own.
- Inventory POs sit in supplier emails while fee statements sit in Seller Central.
- Storage and fulfillment fees are bundled in a settlement report, not itemized per SKU.
- Prep-center invoices for labeling and bundling are easy to forget at year-end.
- Sample units you bought to test a product never get recorded as a cost.
- PPC ad invoices accumulate daily and blur together by the time you review them.
The workflow
Record each FBA cost against its SKU batch
Capture every expense as it lands and tag it to the inventory batch it supports.
- 1
Record the inventory PO
When you order a batch, record the supplier, amount, and a SKU batch label, then attach the purchase order.
- 2
Capture Amazon fee statements
Pull each storage and fulfillment fee statement and record it with the period it covers.
- 3
Add prep-service invoices
Record labeling, bundling, or inspection invoices and note which batch they prepped.
- 4
Log samples and PPC
Record sample-unit purchases and periodic PPC ad invoices so ad spend is documented.
- 5
Tag the SKU batch
Note the SKU batch on each record so all costs for a batch can be reviewed together.
Record structure
What to record for each FBA expense
A consistent field set ties scattered FBA costs back to the inventory they support.
- Expense type
- Inventory PO, storage fee, fulfillment fee, prep invoice, sample, or PPC.
- Vendor / source
- The supplier, Amazon, prep center, or ad platform behind the charge.
- Amount
- What you paid, including currency for overseas supplier POs.
- Date / period
- Purchase date, or the period a fee statement covers.
- SKU batch
- The batch label or ASIN group the cost belongs to.
- Statement or invoice
- The fee statement, PO, or invoice attached to the record.
- Category
- A product-defined expense category so similar costs group together.
- Notes
- Unit counts, lead times, or anything you'll want to recall later.
Example setup
An example FBA expense setup
One way to organize FBA records inside your workspace.
Amazon fee statements
Storage and fulfillment fee statements by period, each attached.
Prep & sample costs
Prep-center invoices and sample-unit receipts noted by batch.
PPC ad invoices
Periodic advertising invoices attached and recorded by month.
Common mistakes
Mistakes to avoid
- Leaving storage and fulfillment fees unrecorded because they're buried in settlement reports.
- Forgetting prep-service invoices that arrive separately from Amazon.
- Not tagging costs to a SKU batch, so you can't review a product's total cost.
- Skipping sample-unit purchases that were real business expenses.
- Letting PPC invoices pile up unattached until year-end.
How it helps
How Cash Workspace helps
One place for every cost
Record inventory POs, fees, prep invoices, samples, and PPC in a single organized list.
Statements attached
Attach each fee statement, PO, or invoice to its record so the document and amount stay together.
Batch tagging
Note the SKU batch on each record so you can review all costs for a batch in one view.
Related
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All finance workflows
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FAQ
FBA expense records FAQ
- Does Cash Workspace pull my fees from Seller Central?
- No. You download each fee statement from Amazon and attach it to a record. Cash Workspace does not sync with Amazon or any account; it keeps what you record organized.
- How should I handle a single PO covering many SKUs?
- Record the PO once with its total, then note the SKU batches it covers. You can keep per-batch notes so each product's cost is reviewable.
- Can it tell me my margin per SKU?
- No. It keeps your inventory, fee, and ad costs recorded side by side for review, but it does not calculate margin or profit.
Organizing help — not tax, accounting, or legal guidance
Cash Workspace is a free workspace for organizing invoices, expenses, receipts, clients, and documents. This page is organizing guidance only — not tax, accounting, legal, or bookkeeping guidance. Cash Workspace does not connect to your bank, does not scan or read your receipts for you, and does not move or collect payments. Whether an expense is deductible depends on your situation, so confirm it with a qualified accountant or tax professional.
Keep every FBA cost tied to its batch
Start a free workspace and record each inventory PO, fee statement, and ad invoice with its SKU batch so your FBA costs stay organized and review-ready.