Dropshipping Taxes & Accounting: Nexus, Resale Certificates & Real Margins
By the I&S Accounting teamReviewed by a licensed U.S. CPA
No Warehouse Doesn't Mean No Rules
Dropshipping's pitch is what you skip: no inventory, no warehouse, no cash buried in stock. What nobody puts in the pitch: you've traded one sales-tax relationship for two, and margins thin enough that sloppy books don't hide mistakes — they compound them.
Two Tax Relationships, One Order
Every dropshipped order has two transactions inside it:
You → customer (retail). Standard economic-nexus rules: cross a state's threshold — commonly $100,000 in sales or 200 transactions — and you register and collect there. Selling through a marketplace? The facilitator usually handles those orders. Through your own Shopify store? That's you.
Supplier → you (wholesale). This is the one that ambushes people. If your supplier has nexus where your customer lives — big dropship suppliers have nexus almost everywhere — their sale to you is taxable unless you've given them a resale certificate. No certificate on file means the supplier charges you tax on the wholesale price while you're also collecting it on the retail price. Tax twice, margin once.
The unglamorous fix: get resale certificates filed with every supplier, for every state they request, and track expirations. It's paperwork. It's also several points of margin.
COGS Without Inventory
The balance sheet gets easier — no stock to count, no FIFO decisions. The P&L gets less forgiving. Your COGS is the supplier's charge per order — product plus their shipping plus their handling fees — and it should be matched order-by-order, not lump-summed monthly. Two reasons:
- Margins are thin. At typical dropship spreads, a quiet $2 supplier increase or a new shipping surcharge flips a product from winner to loser. Order-level matching surfaces it in days.
- Suppliers make mistakes. Double-bills, wrong items, refunds that never arrive. The reconciliation — supplier statement vs. orders shipped — is where that money comes back.
The Margin Stack Tells the Truth
Dropship economics only work as a per-order stack: sale price, minus supplier charge, minus processing fees, minus ad spend per order, minus refunds. Stores tracking that stack per product prune losers monthly. Stores tracking bank deposits find out annually — from their tax preparer.
Refunds deserve special attention: when a customer returns, you refund retail — but whether the supplier refunds wholesale depends on their policy. Books that track both sides show your true refund cost.
The Bottom Line
Dropshipping removed the warehouse, not the accounting. Two tax relationships, certificate paperwork, order-level margins — none of it is hard, all of it is unforgiving when skipped. We run it monthly for eCommerce clients: nexus watched, certificates current, margins real, CPA-reviewed.
Frequently asked questions
Yes — the same economic-nexus rules as any online seller: cross a state's sales or transaction threshold and you register and collect there. Never holding the inventory doesn't exempt the sale; it just adds a second sales-tax relationship, the one between you and your supplier.
Because without a resale certificate on file, the supplier's sale TO YOU looks like a retail sale in states where they have nexus. Provide valid resale certificates and the purchase becomes exempt — otherwise you can pay tax on the wholesale side while also collecting it on the retail side.
The supplier's product charge plus their shipping and handling, matched per order. Because dropship margins are thin, small drifts — a supplier price bump, a shipping surcharge — flip products from profitable to not, and only order-level matching catches it quickly.
Simpler on the balance sheet, trickier on the margin. No stock to count, but two tax relationships instead of one, supplier bills to reconcile against orders, and margins thin enough that bookkeeping lag turns into real losses.