Almost every in-house versus 3PL comparison tells you the break-even is somewhere between 500 and 2,500 orders a month. That is true for a garage or a back room. It says little about a brand already at 5,000 or 10,000 orders with a real warehouse, a team and a lease. This post builds the in-house cost of that operation line by line, puts it next to a 3PL quote for the same volume, and shows what actually decides the answer.
At 5,000 to 10,000 orders a month, a well-run in-house operation in Dallas-Fort Worth costs roughly $3.40 to $3.50 per order before postage, against $3.90 to $4.30 at a 3PL. The 3PL still wins at 10,000 orders ($11.54 vs $11.99 all-in) only because of cheaper postage and no peak-season labor premium. At 5,000 orders the model is close to a tie, so postage rates and your own time decide it.
What does in-house fulfillment cost per order at 5,000 orders a month?
About $3.49 per order before postage, or $17,450 a month, in the model below. Labor is half of it. The inputs are deliberately plain: two full-time packers, a 3,000 square foot unit, a basic shipping and inventory stack, and 1.5 items per order.
| Line | How it is calculated | Monthly cost |
|---|---|---|
| Labor (2 FTE, pick, pack, receive, returns) | 2 x 173 hrs x $24.91 loaded | $8,620 |
| Rent | 3,000 sf x $9.55 per sf per year / 12 | $2,388 |
| NNN charges, utilities, insurance | Assumed $3.50 per sf per year | $875 |
| Equipment (racking, benches, scanners, printers) | $25,000 over 5 years | $417 |
| Software (shipping, inventory) | Assumed | $600 |
| Management time | 15 hrs x $60 | $900 |
| Packaging | 5,000 x $0.55 | $2,750 |
| Errors (reships, replacements) | 1% of orders x $18 | $900 |
| Total before postage | Sum of the lines above | $17,450 ($3.49 per order) |
The labor rate is the part people most often get wrong. The median hourly wage for hand packers was $17.44 in 2025 (O*NET, from BLS data). Wages are only about 70% of what an employer pays: BLS reported in June 2026 that wages and salaries were 70.0% of total compensation for private industry workers, with benefits the other 30.0%. Dividing $17.44 by 0.70 gives a loaded rate of $24.91 an hour.
What does it cost at 10,000 orders a month?
About $3.39 per order before postage, or $33,899 a month. Cost per order falls only slightly with volume because labor scales almost linearly with orders. What you gain is a better spread of rent, software and management time.
| Line | How it is calculated | Monthly cost |
|---|---|---|
| Labor (4 FTE) | 4 x 173 hrs x $24.91 | $17,241 |
| Rent | 6,000 sf x $9.55 / 12 | $4,775 |
| NNN charges, utilities, insurance | Assumed $3.50 per sf per year | $1,750 |
| Equipment | $50,000 over 5 years | $833 |
| Software | Assumed | $800 |
| Management / supervisor time | Assumed | $1,200 |
| Packaging | 10,000 x $0.55 | $5,500 |
| Errors | 1% of orders x $18 | $1,800 |
| Total before postage | Sum of the lines above | $33,899 ($3.39 per order) |
Is a 3PL cheaper than in-house at 10,000 orders?
Yes, narrowly, and only because of postage. Using the 3PL fees from our 3PL cost guide (Brand A at 5,000 orders: $21,450 in fees; Brand B at 10,000: $39,365), the 3PL's own fees are higher than the in-house cost at both volumes. The 3PL comes out ahead at 10,000 orders only if its postage is cheaper. The example assumes an in-house shipper pays $8.60 per parcel and a 3PL's pooled carrier rates average $8.00 at 5,000 orders and $7.60 at 10,000. Those postage differences are assumptions, not quotes.
| Line item | In-house, 5,000 | 3PL, 5,000 | In-house, 10,000 | 3PL, 10,000 |
|---|---|---|---|---|
| Fees / operating cost | $17,450 | $21,450 | $33,899 | $39,365 |
| Postage | $43,000 | $40,000 | $86,000 | $76,000 |
| Total | $60,450 | $61,450 | $119,899 | $115,365 |
| Per order | $12.09 | $12.29 | $11.99 | $11.54 |
At 5,000 orders in-house is $1,000 a month cheaper. At 10,000 orders the 3PL is $4,534 cheaper, about $0.45 per order. Take the postage differential away and in-house wins at both volumes, by $4,000 a month at 5,000 orders and $5,466 at 10,000.
What decides the answer: the four numbers to test
- Postage differential. At 10,000 orders every $0.10 per parcel is $1,000 a month. The 3PL needs to be about $0.55 per parcel cheaper than your own rates to break even. Get your actual carrier invoice and a 3PL's written rate for your most common package before you decide.
- Orders per labor hour. The model assumes 14.5 orders per hour across picking, packing, receiving and returns. If your team does 10, labor at 10,000 orders is about $7,700 higher, and in-house loses by a wide margin. If you have scan-verified picking and a good layout and do 20, in-house gains about $4,800.
- Peak. See the next section.
- What your time is worth. The model charges 15 to 20 hours a month of management. If a founder is covering that gap, price it at what a senior hire would cost, not zero.
What does a peak month do to in-house cost?
It is the strongest argument against in-house at this scale. If November doubles volume from 10,000 to 20,000 orders, the extra 10,000 orders need about 692 additional labor hours at the same productivity. At overtime or agency rates of 1.5x the loaded wage, that is about $25,900 in extra labor, or $2.59 per extra order against $1.72 per order in a normal month. You also need space for the extra inventory and packaging. A 3PL moves labor between clients, and its peak surcharges are published and negotiable. See our peak season guide.
What costs do in-house spreadsheets leave out?
- Hiring and turnover. Recruiting, onboarding and the weeks when a new packer is slower than the model assumes.
- Capital for growth. The next jump from 6,000 to 12,000 square feet means a new lease, racking and moving, usually on a multi-year term.
- Insurance and compliance. Workers' compensation, general liability and inventory coverage. Get quotes for your state and payroll.
- Carrier negotiation. Small shippers get less negotiating power and often pay surcharges the 3PL's pooled volume avoids.
- Downtime. Sick days, a carrier pickup you miss, a printer failure. A 3PL has cover; a two-person team does not.
What does DFW warehouse space cost in 2026?
Cushman & Wakefield reports average asking rent for Dallas-Fort Worth warehouse and distribution space at $9.55 per square foot per year (net) in Q3 2026, up 20.1% year over year, with overall vacancy at 7.3%. C&W notes part of the rise reflects a shortage of large, lower-rent buildings, so the average is skewed by building mix. Get quotes for a unit of your size. Net rent also excludes taxes, insurance and common-area charges, which the model covers with an assumed $3.50 per square foot.
Where Orderfy fits
Orderfy is a 3PL in Garland, Texas (Dallas-Fort Worth) for high-volume Shopify and Amazon sellers. Every charge is itemized in a quote built on your numbers, including how postage is billed.
- Same-day shipping from the center of the US, reaching both coasts quickly by ground.
- Photos of each delivery received and of packed orders before pickup, and direct communication channels for 24/7 access to the warehouse team.
- Each brand has dedicated staff who know its specifics, and Orderfy handles large surges, including product launches and limited-time drops.
- Inbound inventory is typically received and sellable the same day, and the client portal shows inventory and order status at every stage.
- Orderfy is probably not the right choice if you ship under a few hundred orders a month, or if you have a very small catalog and a team that already runs a tight, cheap operation at under 3,000 orders a month.
Frequently asked questions
General guides put it at 500 to 2,500 orders a month for small operations. For a brand already running a dedicated warehouse, the model above shows a near tie at 5,000 orders and a 3PL advantage of about $0.45 per order at 10,000, driven mostly by postage and peak labor.
Management time and peak-season labor. Both are easy to leave at zero in a spreadsheet and are among the largest swing items in the model.
Divide the hourly wage by the share of compensation that is wages. BLS reported that share at 70.0% for private industry in June 2026, so $17.44 becomes about $24.91. Use your actual payroll taxes and benefits if you have them.
Its fees usually do: $3.94 per order at 10,000 orders in our example, against $3.39 in-house. The total can still be lower because carrier rates, peak labor and management time are priced differently.
It depends on integration, SKU setup and how fast inventory can be sent. Ask any 3PL for its onboarding timeline and what it needs from you before go-live, in writing. Plan the move away from peak season, and keep a small buffer of stock in-house until the first receipt is confirmed. Orderfy, for example, helps brands transition in, including all software setup, and has written documentation for onboarding, transitioning and ongoing support in Orderfy WMS. Go-live can be as fast as the same day once products and inventory are ready.
Sometimes: custom or fragile kits, hand-finished products, or launches where you want to touch every box. Many brands split by SKU and move the high-volume, standard-pack items first.
Sources
- Packers and Packagers, Hand (53-7064), O*NET OnLine: median wage $17.44 an hour (2025 data)
- Employer Costs for Employee Compensation, June 2026, BLS (released Sept 9, 2026)
- Dallas/Fort Worth Industrial MarketBeat Q3 2026, Cushman & Wakefield
- How Much Does a 3PL Cost?, Orderfy: Brand A and Brand B fees
- Postage per parcel, NNN charges, software, management time and error costs are stated assumptions, not sourced figures.
Get a quote on your numbers
Send your orders, items per order, current postage per parcel and monthly in-house spend, and Orderfy will build an itemized quote you can set against your own model.