Packing slip entry: what double keying really costs you
Re-keying a packing slip takes three minutes. Over a year it is counted in headcount. How to cost it, and what automation changes.
By Jérôme Knops
Published September 18, 2026 · Updated September 20, 2026 · 5 min read
Nobody frames this as a problem. It is simply what you do: the packing slip arrives, someone opens it, and re-types into the ERP what is already written on it. Three minutes. Hardly worth a meeting.
Which is exactly why it lasts. A three-minute task never triggers a decision — and a company handling two hundred notes a week spends the equivalent of a full-time role on it without the line appearing anywhere.
What you are really paying for, and it isn't the keying time
Time is the visible part, and the cheapest. Three other costs sit on top of it, and they weigh more.
Errors. A misread item number, a transposed quantity, one unit taken for another. The error is invisible at entry: it shows up at the inventory count, in a shortage, or in a supplier invoice you overpay. The cost is never charged to data entry — it is charged to inventory.
The lag. A day passes between delivery and entry, sometimes three. During that time the inventory on screen is wrong. Decisions made on that inventory — a replenishment order, a delivery date promised to a customer — are made on figures that have expired.
Disputes you lose. This is the most expensive and the quietest. A packing slip signed with an exception is a legal document: it is what lets you contest damage or a shortage, within the short deadlines transport law allows. If it sits in a folder, gets photographed by a driver, or is keyed without its handwritten note, the exception exists on paper but not in the file. When the time comes to claim, you cannot find it.
The method for costing it
It fits in two lines, and it works with your own figures.
Time: notes per week × minutes per note × 46 weeks ÷ 60 = hours per year
Errors: notes per year × error rate × average cost of an error
The error rate is the one value nobody has to hand. Two ways to approach it: count the unexplained inventory discrepancies over a quarter, or take the year's supplier credit memos. Both give a floor, never a ceiling.
A worked example, for the order of magnitude
A company receiving 200 packing slips a week, keyed in 3 minutes each, at a loaded hourly cost of €32.
| Step | Calculation | Result |
|---|---|---|
| Notes keyed in a year | 200 × 46 | 9,200 notes |
| Keying time | 9,200 × 3 min | 460 hours |
| Cost of time alone | 460 × €32 | €14,720 |
| Errors, at 1.5% and €40 each | 9,200 × 1.5% × €40 | €5,520 |
| Annual total | €20,240 |
Twenty thousand euros without counting a single lost dispute, or a single shortage caused by wrong inventory. It is a floor, and it is already the order of magnitude of an automation project that pays for itself within the year.
What automatic reading can do, and what it cannot
Precision matters here, because this is where these projects break.
On a printed, clean document, automatic reading is highly reliable — around 95% of fields correctly extracted. On a photo taken at an angle inside a truck, on a third-copy carbon, or on a handwritten note, it is markedly less so. And the handwritten note is precisely the one that counts: it is the exception.
Hence the rule we apply: the machine reads, the human validates what matters.
- Stable fields — supplier, number, date, items, quantities — are extracted and pre-filled.
- Anything read with doubt is flagged, not silently guessed.
- The handwritten exception is never interpreted automatically. It is isolated, shown large, and requires human confirmation.
- Matching against the purchase order is done by the machine: it is what spots that you ordered 40 and received 38.
In practice: a three-minute entry becomes a twenty-second check, and discrepancies surface on their own instead of being discovered three weeks later.
The gain we hadn't expected is that we see the discrepancies the same day. Before, we saw them on the invoice.
Where to start, and what not to do
Start with one supplier. The one with the largest volume and a stable note format. A month is enough to measure the real read rate on your documents — not on a demo.
Keep the document. The image of the note, exception included, must stay attached to the goods receipt in the ERP. That is what makes the difference on the day of a dispute: you find the evidence in ten seconds, not in two hours of archives.
Don't remove the check, move it. A system that keys everything and never flags anything creates confidence it hasn't earned. What you want is zero entry on what is certain, and all the human attention on what isn't.
What not to do: aim for 100% of suppliers in the first month, and judge the tool on the supplier whose notes are handwritten. That is the hardest case, and it will give you a false measure of what the whole can return.
How we remove the retyping
The packing slip arrives by email, as a photo, or scanned on paper. It is read, compared line by line against the order, then written into your ERP — without anyone opening the document.
What matters is not the automatic reading, which has become ordinary. It is what happens when the two do not match: the discrepancy surfaces right away, before the supplier invoice lands, while it can still be disputed. See the orders and packing slips module.
Double keying of packing slips: what to take away
The real cost is not the keying time: it is the time plus the inventory errors, plus the lag between delivery and record, plus the disputes you never file because the exception cannot be found.
Cost it with your own volumes and a conservative error rate; the order of magnitude is enough to decide. And keep the rule that makes these projects hold: the machine reads what is printed, the human validates what is written by hand.
Frequently asked questions
What does re-keying packing slips cost?
Multiply the number of notes per month by the re-keying time per note, then by your loaded hourly cost and by twelve. At 400 notes a month and three minutes each, that is 240 hours a year — not counting the cost of errors, which is often the heavier half.
What errors does double entry cause?
Three above all: quantity discrepancies only discovered at the inventory count, supplier disputes that can no longer be documented for want of a recorded exception, and invoices paid on quantities never received. Each costs more than the keying time itself.
How do you remove the re-keying of a packing slip?
By creating the information at the point of receipt rather than back at the office: the line is checked off on a phone, the discrepancy is noted on the spot with a photo, and it all reaches the system without passing through a keyboard again. What is observed on the dock has no reason to be re-typed two hours later.
What should you do with discrepancies found at receipt?
Record them at the moment they are seen, with a photo and the name of whoever saw them. A discrepancy noted on paper then forgotten becomes a dispute you lose; a time-stamped, documented discrepancy becomes a credit note.
Founder and CTO of Edenio
Jérôme Knops is the founder of Edenio, where he designs and builds custom business applications for construction, supply chain and distribution companies. He runs the scoping meetings, writes the code, and stays the person you talk to once the tool is in production.
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Jérôme Knops
