Tenthliner vs. Manual Line Numbering: Which Saves More Time?
By GeneralAdmin · August 31, 2026 · 5 min read
Manual tenthlining has a certain appeal: it's free, it doesn't require an account or an internet connection, and every litigation clerk in Kenya has done it at least once with a ruler and a pen. The question worth asking isn't whether it works. It's whether it's actually the cheaper option once you account for time, rework, and the cost of getting it wrong. Here's an honest, side-by-side look.
What manual line numbering actually involves
Doing this by hand means opening the document, counting down ten lines at a time, and marking the margin at each tenth line, either by hand on a printed copy or by manually placing text boxes in a PDF editor. A few things make this harder than it sounds:
- Line spacing isn't always perfectly uniform across a document, especially one drafted by multiple people or pasted together from different sources, so a visual count can drift.
- If content changes after numbering, even a single added or deleted line, every mark after that point has to be redone.
- Marking margin numbers in a PDF editor by hand usually means placing individual text boxes, one per tenth line, which is itself a slow, repetitive task prone to slightly inconsistent placement.
- For a long document, like a Record of Appeal running into hundreds of pages, the count has to stay accurate across every single page without a mistake compounding as you go.
None of these problems are hypothetical. They're the specific, recurring reasons formatting errors show up in filed documents, covered in more detail in Why Kenyan Courts Reject Pleadings Over Formatting Errors.
What Tenthliner does instead
Tenthliner works from the actual text positions in your PDF rather than a visual or manual count. You upload the finished document, choose a court preset or your own settings (font, line marking interval, numbering position), and the system calculates line positions directly from the document's text layout, then applies numbering consistently across every page. For scanned documents without a text layer, it runs OCR first to build one, then numbers from that, covered in How to Add Margin Line Numbers to a Scanned Legal Document. Your original content isn't touched. Only the numbering is added.
Time: an honest, illustrative comparison
These are rough, illustrative estimates based on typical document lengths, not a formal benchmark study, but they reflect the order of magnitude difference in effort:
| Document | Manual numbering (estimated) | Tenthliner |
|---|---|---|
| Short affidavit (5 pages) | 10-20 minutes of careful counting and marking | Under a minute of processing, plus upload time |
| Standard pleading (15-20 pages) | 30-60 minutes, with meaningfully higher risk of a miscount | A few minutes of processing |
| Record of Appeal (100+ pages) | Multiple hours, often split across more than one person to cross-check | Minutes, scaling with page count, not with manual attention span |
The gap widens as documents get longer, which is exactly backwards from what you'd want if you're trying to budget time for filing deadlines. A short document is where manual numbering is most tolerable. A long Record of Appeal, which is also the document type where the High Court's 2022 directions explicitly require every-tenth-line numbering under Paragraph 14, is where manual counting is most likely to introduce an error and most expensive to redo.
Rework: the cost manual numbering doesn't advertise
The real cost of manual numbering usually isn't the first pass. It's the redo. If a partner asks for a paragraph to be reworded after the document has already been numbered, manual numbering means re-counting and re-marking from that point forward, sometimes for the rest of the document. With Tenthliner, since numbering is applied as a final step against the finished PDF, a content edit just means re-exporting and reprocessing, which takes the same few minutes it did the first time, not more.
Cost: credits versus billable time
Tenthliner runs on a credit system, one credit per page, with new accounts starting with 50 free credits and further credits purchased in bundles that get cheaper at higher volumes. Manual numbering has no listed price, but it isn't free. It consumes the time of whoever is doing it, usually a clerk, paralegal, or the advocate themselves, and that time has a real cost whether or not it appears on an invoice. For a firm processing more than a handful of documents a month, the credit cost is small relative to the billable or opportunity cost of the hours spent counting lines by hand, particularly on longer documents.
Where manual numbering still makes sense
To be fair to the manual approach: for a genuinely one-off, very short document, and where there's no reliable internet access at the moment you need to file, doing it by hand is a reasonable fallback. It's also useful to understand the underlying requirement even if you never do it manually again, since knowing what "every tenth line, right-hand margin" actually means helps you spot-check automated output rather than trusting it blindly.
The bottom line
Manual line numbering isn't free, it's just billed differently, in time and rework rather than in credits. For short, one-off documents, the difference is small enough not to matter much. For anything longer, or anything likely to go through another editing round before filing, the time saved by automating the count grows quickly, and the risk of an inconsistent or miscounted result drops to close to zero.
For the underlying formatting rules that make tenthlining necessary in the first place, see What Is Tenthlining and Why Kenyan Courts Require It.
