The paperwork side is ordinary small-business setup, and the SBA's own startup-cost framework, read 2026-09-01, covers it: pick a structure, register, budget for the categories it lists. What it will not tell you is what changes on the shipping line the day you stop routing orders to a supplier and start holding stock yourself — that number only shows up on an actual checkout, so we priced one.
Once inventory sits in your own space, the label is your own bill too.
The SBA's own guidance for calculating startup costs, read 2026-09-01, opens by sorting businesses into three shapes rather than treating retail as one thing:
“Most businesses fall into one of three categories: brick-and-mortar businesses, online businesses, and service providers. You'll face different startup expenses depending on your business type.”U.S. Small Business Administration, Calculate your startup costs, read 2026-09-01
The same page lists the categories a founder should budget against: office space, equipment and supplies, communications, utilities, licenses and permits, insurance, a lawyer and accountant, inventory, employee salaries, advertising and marketing, market research, printed marketing materials, and building a website. "Inventory" sits in that list as one word, with no dollar range and no distinction between a supplier shipping it for you and a garage full of boxes you now ship yourself. The next section prices that distinction with a live quote rather than an estimate.
To put a real number against the SBA's unpriced "inventory" line, we quoted the two shipping events a dropshipping supplier would have absorbed and a self-fulfilling seller now pays directly: the first order going out, and a customer return coming back. Both were priced live on 2026-09-01 for the same 9 × 6 × 3 in, 1 lb parcel, on the Berkeley Heights, NJ 07922 to Denver, CO 80202 lane.
| Carrier | Service | Price | Quoted transit |
|---|---|---|---|
| USPS | Ground Advantage | $10.29 | 6-7 business days |
| UPS | Ground | $12.40 | 6-7 business days |
| UPS | 3 Day Select | $16.20 | 6-7 business days |
| UPS | 2nd Day Air | $16.25 | 2-3 business days |
| USPS | Priority Mail | $16.35 | 3-4 business days |
| Carrier | Service | Price | Quoted transit |
|---|---|---|---|
| USPS | Ground Advantage | $10.29 | 6-7 business days |
| UPS | Ground | $12.40 | 6-7 business days |
| UPS | 3 Day Select | $16.23 | 6-7 business days |
| USPS | Priority Mail | $16.35 | 3-4 business days |
| UPS | 2nd Day Air | $16.54 | 2-3 business days |
Ground Advantage priced identically both directions at $10.29, so a single unit that ships out and comes back costs twice that in postage alone before the inventory purchase, the packaging, or the time to repack it are counted. A dropshipping seller running the same sale never sees either charge — the supplier's wholesale price already has it built in.
Shopify's published figures put a typical dropshipped margin at 10% to 50% depending on the supplier network, with fulfillment costs already priced into the wholesale rate. The tradeoff for that ceiling is zero shipping risk on any single order.
$10.29 out and $10.29 back on the lane quoted above is not a worst case — it is the cheapest option available on the date quoted. A slower or heavier item, or a return that has to move faster, prices higher on the same tables.
Registration, licenses, insurance and a website cost roughly the same either way. What moves is what sits behind the single word "inventory" on that list — a wholesale invoice a supplier ships against, or a stack of boxes with your own postage on top.
The SBA revises its guidance pages without a change log a third party can subscribe to. Treat the wording above as what was published on the date shown, and check the current page before building a budget on the strength of it.
Pick a storefront platform, line up a supplier who ships directly to your customers, and treat it like any other small business for registration and tax purposes. The SBA's own framework for calculating startup costs, read 2026-09-01, covers the general steps; it does not price the one cost dropshipping is built to avoid, which is shipping.
Office space, equipment and supplies, communications, utilities, licenses and permits, insurance, a lawyer and accountant, inventory, employee salaries, advertising and marketing, market research, printed marketing materials, and building a website. The SBA's own page, read 2026-09-01, lists inventory as one category with no dollar figure attached.
No, and that is the entire appeal of the model. Our separate explainer on how dropshipping works covers the order flow where a supplier ships directly and the seller's inventory count never moves. This page is for the moment that changes.
A shipping label on every outbound order, and a second one on every return, both paid by the seller instead of absorbed inside a supplier's wholesale price. A live SMKlog quote on 2026-09-01 for a small parcel priced the outbound leg at $10.29 and the return leg at the same $10.29, both the cheapest option on the lane.
Dropshipping removes the inventory and shipping cost but caps the margin, since a supplier prices its wholesale rate to cover the fulfillment it is doing for you. Holding stock adds a real, billed shipping cost on every order and return, in exchange for buying at a lower unit cost and controlling the box. Neither is free; the SBA's cost categories apply to both, just with different numbers behind the word 'inventory'.