A single stamped letter costs $0.78 in postage. But the total cost of mailing that letter in-house -- when you include labor, supplies, and equipment -- lands at $3-5 per piece (Bureau of Labor Statistics + USPS data, 2024). That's 4-6x what you'd expect.
This comparison breaks down both sides: what in-house mailing actually costs, what outsourced mailing costs, and at what volume the switch makes financial sense. This is especially true for invoice-heavy businesses -- see our full cost comparison of mailed vs emailed invoices.
What does in-house mailing actually cost?#
In-house costs fall into three buckets: materials, labor, and overhead. Most businesses only count the first one.
Materials ($0.87/letter)#
Item | Cost |
|---|---|
Postage (Forever stamp) | $0.78 |
#10 envelope | $0.05 |
Copy paper (8.5x11) | $0.007 |
B&W laser toner | $0.03 |
Materials subtotal: $0.87 per letter. That's real, but it's less than a third of the actual cost.
Labor ($1.14-$2.66/letter)#
Processing one letter takes 3-7 minutes. At the BLS median hourly wage for administrative clerks -- $22.82/hour (SOC 43-6014, May 2024 OES) -- that's $1.14-$2.66 per letter in direct labor.
The math gets worse at scale. Even at $20/hour, 1 hour per week on mail = $1,040/year. That's $1,040 of someone's salary spent printing, folding, and stuffing envelopes -- work that doesn't grow the business, close deals, or serve customers.
Add the post office trip: 30-60 minutes per batch, regardless of volume. At $22.82/hour, each trip costs $11.41-$22.82 in labor. That's fixed overhead -- it doesn't drop when you mail fewer pieces.
In-house costs scale linearly with volume. Outsourced costs stay flat per piece.
Overhead#
Printer lease or depreciation, toner cartridge inventory, envelope stock, return label management, and the supervision cost of tracking who mailed what. None of this shows up on a per-letter invoice -- but it's real.
A business-grade printer lease runs $50-200/month. Toner cartridge replacements, paper jams on heavy stock, and IT time to maintain the printer add another layer of cost that most businesses forget to attribute to their mailroom.
Fully loaded: $3-5 per letter.
For a deeper breakdown of what your mailroom actually costs, see The True Cost of Running a Mailroom.
What does outsourced mailing cost?#
Outsourced print-and-mail services charge per piece with everything included:
Item | B&W | Color |
|---|---|---|
First page | $1.50 | $1.75 |
Additional page | $0.20 | $0.40 |
Flat envelope (7+ sheets) | +$2.50 | +$2.50 |
Processing fee | 2.9% + $0.30 | 2.9% + $0.30 |
Real cost examples#
Letter type | Base price | Processing fee | Total |
|---|---|---|---|
1-page B&W | $1.50 | $0.34 | $1.84 |
3-page B&W | $1.90 | $0.36 | $2.26 |
5-page B&W | $2.30 | $0.37 | $2.67 |
1-page Color | $1.75 | $0.35 | $2.10 |
3-page Color | $2.55 | $0.37 | $2.92 |
That price covers printing, paper, envelope, postage, USPS address verification, delivery tracking, and USPS drop-off. No subscription fees. No minimums. No equipment to maintain.
Side-by-side: 100 letters per month#
Cost category | In-house | Outsourced (Postmarkr) |
|---|---|---|
Materials | $87 | Included |
Labor (4 hrs @ $22.82) | $91.28 | $0 |
Post office trips (2x) | $22.82-$45.64 | $0 |
Printer lease | $50-$200 | $0 |
Per-piece cost | -- | $184 |
Monthly total | $251-$424 | $184 |
Monthly savings | -- | $67-$240 |
At 50 letters per month, the gap narrows but still favors outsourcing: $150-$250 in-house vs $92 outsourced.
The savings compound when you factor in what your team does with the reclaimed time. A bookkeeper spending 3 hours per week on mailing at $22.82/hour is $68.46/week in labor -- $274/month -- that could go toward billable work, collections, or client management.
What about quality and control?#
Common concern: does outsourced mail look professional? Yes.
- Printed on standard 8.5x11 white paper with laser printing
- Mailed in standard #10 business envelopes
- Return address printed on the envelope
- Every address verified against USPS CASS database before printing
- Delivery tracking on every piece -- print confirmation, USPS acceptance, in-transit scans, delivery confirmation
- Print quality guarantee -- if there's a quality issue, we reprint and resend for free
You actually gain control with outsourcing: address validation catches errors before you pay for postage, and a dashboard shows exactly what was sent and when.
When outsourcing doesn't make sense#
In-house still wins in a few specific scenarios:
- Highly sensitive documents that can't leave your physical control (some legal or medical contexts)
- Same-day hand delivery to a local address
- Unusual formats -- oversized packages, custom inserts, or non-standard paper stock that a standard mail service doesn't support
- Fewer than 10 letters per month where the time cost is genuinely negligible and someone on your team doesn't mind
For everything else -- invoices, statements, notices, collection letters, marketing mail -- outsourcing costs less and delivers faster.
Which option fits your business?#
Not sure if it's time? Here are 5 signs your business has outgrown its mailroom.
In-house makes sense when you send fewer than 10 letters per month and someone on your team genuinely doesn't mind handling it.
Outsourcing makes sense when you're sending 20+ letters/month, when the post office trip is eating productive time, or when you need address verification and delivery tracking that manual mailing can't provide.
Most businesses that try outsourcing don't go back. The cost savings are measurable, the time savings are immediate, and the quality is at least as good as what you'd produce in-house. Once you've decided to outsource, here's how to automate your business mail in 4 steps.
Frequently Asked Questions#
How much does it cost to mail a letter in-house?#
Most businesses spend $3-5 per letter when you add up paper, ink, envelopes, postage, and labor. The biggest hidden cost is time -- a 20-letter batch typically takes 60-110 minutes of someone's workday. At $22.82/hour, that's $1.14-2.66 per letter in labor alone, before materials.
How much does outsourced business mail cost?#
With Postmarkr, a single-page B&W letter costs $1.50 plus a 2.9% + $0.30 processing fee ($1.84 total). Additional pages are $0.20 each. Postage is included. No subscription, no minimums -- you pay per piece.
Is outsourced mail secure?#
Documents are encrypted in transit and at rest. Document files are deleted within 7 days after printing. Your documents are processed automatically -- no one reads or reviews the content of your mail.
What happens if outsourced mail gets lost?#
If USPS confirms a letter was lost, we resend it for free. Every piece includes tracking so you can monitor delivery status from your dashboard.
At what volume does outsourcing mail make sense?#
The breakeven is surprisingly low. At 20 letters per month, most businesses save $40-70/month by outsourcing -- primarily from reclaimed labor time. At 100+ letters, the savings compound because you eliminate dedicated mailroom overhead entirely.
Can I still send certified mail through an outsourced service?#
Yes. Postmarkr supports First-Class, Certified ($8.50 surcharge), and Priority ($11.00 surcharge) mail classes. Certified mail includes USPS delivery confirmation with legal proof of mailing.
Skip the printer. Send your first letter in 60 seconds.#
Upload a PDF, enter an address, pay. We print next business day and mail via USPS with tracking on every piece. $1.50 for a single-page B&W letter -- postage included.
- No subscription required
- No minimums
- Pay per piece -- send 1 or 1,000
- Delivery guarantee -- lost in the mail? We resend for free