The visible cost
Hours. At $25/hour (loaded cost) and 10 hours/week, that's $13,000 per year.
That's the number everyone talks about.
The error rate cost (2-3x more expensive)
Human error on data entry runs 1-4%. Small number, right?
Wrong.
Every error means detection time (how long until someone notices?), investigation time (where did it go wrong?), and correction time (fixing it across all the systems it touched).
A 2% error rate on 100 invoices means 2 errors. 2 errors that need 45 minutes each to find and fix. That's 90 minutes of senior person time on data cleanup, plus the rework.
For every hour of data entry work, add another 20-30 minutes of error triage.
Real impact: data entry costs 1.5x what you think it costs.
The rework cost (the expensive layer)
Someone enters the data wrong. The error propagates. Now it's in three systems and two reports.
A property management company with a 2% error rate on 80 lease renewals per month: that's 19 errors annually. Half of them don't surface until month-end when the numbers don't reconcile.
Now a senior person (who should be on revenue work) spends time unraveling what happened.
Rework cost: often 3-4x the original work cost.
The senior person tax (the killer)
Data entry pulls senior people. You know why?
The junior person enters it wrong, the system breaks, and you need the senior person to fix it.
Senior person time is expensive. An owner at $100/hour pulled into data entry cleanup is a $100/hour intervention into a $13/hour problem.
Do this 10 times per month and you're burning $12,000 annually on data entry supervision.
The real cost formula
Pick a manual data entry process you run.
- Direct labor: 20 hours/week × $25/hour × 52 weeks = $26,000
- Error detection and rework: add 50% = $13,000
- Senior person triage: estimate high = $12,000
- Processing delays and customer friction: $4,000
Real cost: $55,000 per year
That's for one moderately-busy data entry process in a small operation. Most businesses have 3-5 of these running simultaneously.
Real impact: $100K-$200K in actual cost that shows up as "that's just what we spend on this process."
Next steps: Invoice processing is one of the most expensive of these — read the invoice processing automation guide for a worked example. Law firms and legal ops teams see the same costs on intake and matter management — see the legal services playbook.