Pet supplies: $32 ASP, 2.8 lb/unit, 1500 orders/mo, 55% gross margin, 5% return rate. Comparing FBA, 3PL, self-fulfill, dropship.
$9.36/order all-in
$12.34/order all-in
$9.60/order all-in
18% net margin (no inventory)
Here's what the math looks like for Pet supplies as of 2026-05-25. The cheapest of the 4 options we compared is Dropship at roughly $14,400/mo all-in, and the priciest is 3PL (ShipBob / Easyship) at $40,110/mo. That's a monthly spread of $25,710 — money that compounds fast when you're talking five-year and ten-year horizons.
Where it gets interesting is the wealth side. Over five years, Amazon FBA builds the most net worth ($733,600) thanks to a mix of equity, appreciation, and avoided sunk cost. The worst-performing path leaves you about $265,200 behind it. That gap is why "which is cheaper this month" is the wrong question. The right one is "which path puts me ahead five years out, given my actual vertical and my own risk tolerance?"
Below we walk through each option with the local numbers we pulled for Pet supplies, then three plug-and-play scenarios you can run before you commit to anything.
Every vertical we publish gets its own data sheet because the answer genuinely changes by location. For Pet supplies, the specifics that move the needle are: Average sale price $32, Unit weight 2.8 lb, Monthly orders 1,500, Gross margin 55%, Return rate 5%. A national-average calculator that ignores those inputs will lie to you about Pet supplies specifically — sometimes by tens of thousands of dollars over a five-year window.
That's why this page isn't a wrapper around a generic spreadsheet. The four (or five) option columns above are running on Pet supplies's actual property tax rate, transit fare, median rent — whatever applies to this hub. If something looks off versus what you're seeing on the ground, that's useful signal: scroll to the methodology section, check our sources, and tell us what we missed. We update these numbers on a published cadence and credit the contributors who spot drift.
Amazon FBA — $9.36/order all-in. Roughly $35,640/mo all-in with $8,000 upfront. After five years our model projects a net-worth delta of $733,600 versus a do-nothing baseline. Where it wins: Prime badge = conversion bump; Amazon handles returns + customer service; Multi-channel from FBA inventory. Where it bites: 15% referral fee + $9.36/order kills margin; Long-term storage fees if you don't turn; Account suspension risk.
3PL (ShipBob / Easyship) — $12.34/order all-in. Roughly $40,110/mo all-in with $5,000 upfront. After five years our model projects a net-worth delta of $468,400 versus a do-nothing baseline. Where it wins: Multi-channel native (Shopify + Amazon + DTC); Own customer relationship; Returns scale better than self. Where it bites: Per-pick fees add up at 1500+ orders/mo; Inventory split across warehouses; Onboarding is 4–6 weeks.
Self-fulfill from home/garage — $9.60/order all-in. Roughly $36,000/mo all-in with $1,500 upfront. After five years our model projects a net-worth delta of $718,500 versus a do-nothing baseline. Where it wins: Cheapest per-order; Direct quality control; Includes-handwritten-note touch. Where it bites: Becomes a full-time job past 800 orders/mo; Doesn't scale past ~1,200/mo; Vacation = pause your business.
Dropship — 18% net margin (no inventory). Roughly $14,400/mo all-in with $200 upfront. After five years our model projects a net-worth delta of $518,200 versus a do-nothing baseline. Where it wins: Near-zero startup capital; No inventory risk; Test-and-iterate on assortment. Where it bites: 18% margin vs 55% on owned inventory; Quality control is the supplier's call; Long lead times kill conversion.
Conservative — assume things go sideways. Use the lower end of every input. Income flat for five years, no appreciation, maintenance comes in 30% over your initial estimate, and you stay put the full term. In this scenario the option with the lowest *combined* monthly + opportunity cost usually wins, even if it's not the headline-cheapest one. For Pet supplies, that's typically Dropship — but only if the five-year net-worth delta is within $66,300 of the leader; otherwise the equity gap closes the case.
Typical — assume the base rate. Plug in the median figures shown on this page. This is what a representative household in Pet supplies actually experiences, not a best-case projection. We bias these inputs slightly conservative on appreciation and slightly aggressive on maintenance because that's where most calculators fail people in practice.
Ambitious — assume things break your way. Raise your income trajectory, drop your move-out horizon to three years, and let appreciation run at the upper end of Pet supplies's historical band. In this case the equity-building options (typically Amazon FBA) pull ahead hard — often by enough that the higher monthly carry pays for itself before year four. The watch-out: ambitious scenarios assume you actually execute. If you're not sure you'll stay, the conservative path is the honest pick.
- Pet supplies return rate of 5% destroys FBA margin: every return = full referral fee + restocking + often unsellable. Bake returns into your FBA pro-forma.
- Unit weight (2.8 lb) makes FBA expensive for Pet supplies. Past 2 lb, 3PL or self-fulfill usually beats FBA on landed cost.
- Self-fulfill stops scaling around 1,000–1,200 orders/mo for a single person. You'll either hit that wall or burn out hitting it. Plan the 3PL handoff for ~800 orders/mo, not 1,500.
- Dropship margin (18%) is real but fragile — when your supplier hikes prices or runs out, you have zero leverage. Treat dropship as a testbed for assortment, not a long-term model.
None of these are unique to Pet supplies alone, but they hit harder here than the national average because of the specific cost structure we documented above. The save-scenario feature on this page is built precisely so you can capture a "before I forget" snapshot of your numbers and compare against your real bank-statement reality six months later.
FBA per-order cost = base fulfillment tier ($3.30) + weight-handling fee + 15% referral fee (median across categories). 3PL per-order cost = pick/pack ($3.50 industry median) + actual shipping ($8 blended USPS/UPS) + weight surcharge. Self-fulfill = labor ($1.20 at $25/hr × 3-min picks) + postage ($8) + packaging ($0.40). Dropship uses a 22% blended net margin (Shopify Plus / Marketplace Pulse 2024). Five-year net worth = per-order margin × orders/mo × 60 mo − one-time setup costs.
Specifically for Pet supplies, the inputs above come from: Amazon FBA published fee schedule, 2024 release; ShipBob + Easyship public rate cards, 2025; Shopify Shipping benchmark report, 2024; Marketplace Pulse e-commerce fulfillment data 2024; JungleScout State of the Amazon Seller, 2024. Where two reputable sources disagreed we used the more recent figure and noted the prior value in our changelog. We don't accept paid placements on these pages — affiliate disclosure lives on the editorial-policy page in the footer.
Last reviewed 2026-05-25. If you spot a number that's drifted, the "Email me this result" button on each option sends us a copy along with whatever you flagged.
Save these inputs as a named scenario, or copy a prefilled link to share the exact setup.
For pet supplies at $32 ASP and 2.8 lb/unit, FBA leaves you ~$8.24 net margin per order vs ~$5.26 on a 3PL and ~$8.00 self-fulfilling. FBA wins on margin here — the Prime conversion lift typically adds another 20–40% on top.
Around 800+ orders/mo is when self-fulfill starts breaking down (your back, your weekends, your sanity). At 1500 orders/mo for pet supplies, a 3PL costs ~$18,510/mo all-in but reclaims ~80 hrs of your time monthly. The math: only worth it if those hours go to product/marketing work that drives growth.
For pet supplies at 1500 orders/mo, self-fulfilling means picking, packing, labeling, and dropping off ~68 packages per business day. That's a full-time job. Past ~1,200 orders/mo it's nearly impossible solo.
Dropship cuts your margin from 55% to 18% net. At 1500 orders/mo, that's ~$17,760/mo in foregone margin. Worth it only if you don't have the cash or risk tolerance for inventory — or if you're using it as a test phase before going asset-light.
This is the empirical winner for most pet supplies sellers past $50k/mo revenue. Put your top-10 SKUs (Pareto's 80% of revenue) on FBA for the Prime bump; everything else lives at a 3PL so you control margin and customer experience. Adds operational complexity but typically a 5–15% net margin boost over single-channel.