CA Firm Timesheet Management: 4 Excel Checks to Improve Data Accuracy

Many CA firms record staff time in a shared Excel file. The usual complaint is that people submit late. When I rebuilt the timesheet for a firm of about 50 people earlier this year, late submission turned out to be the smaller problem. The bigger one was that the data going into the sheet could not be relied on, and nobody had a way to tell.

Here are the four things I found, written as checks you can run on your own sheet this week. Each has a fix you can make in Excel itself.

1. Do client and client group always agree?

The firm's template had one dropdown for the client, with about 500 names, and a second dropdown for the client group. Nothing connected the two. The instructions asked each person to check, on every row, that the group matched the client.

• The check: filter your last quarter's entries by one large group. Then look at the client column. Count the rows where the client does not belong to that group.
• The fix: remove the group dropdown. Keep one master list with two columns, client and group, and let the group fill itself in with a lookup on the client name. One choice by the user, not two.

Every report by group, and any costing or realisation working built on it, depends on this one column being right.

2. Can a closed period still change?

Once a fortnight was submitted, anyone with the file could still edit a row in it. Afterwards, there was no way to know that it had happened.

• The check: take a report you circulated two months ago and rebuild it today from the same sheet. If the totals differ, something moved after the period closed.
• The fix: on the closing date, save a copy of the period as a separate read-only file and report from that copy. Protect the closed rows in the working file with a password that only one person holds. If a correction is genuinely needed, that person makes it and writes down why.

3. Who can see whose hours?

A shared file has one level of access. An article assistant, a manager and a partner all open the same sheet and see the same rows.

• The check: ask who in the firm can currently open the full timesheet. If the answer is "everyone", decide whether that is intended.
• The fix: give each person their own file, or their own sheet with the others hidden and protected. Managers get the files of their own team. It is clumsier to consolidate, which brings us to the last point.

4. How long does it take to produce one report?

Hours by client, by partner or by type of assignment meant collecting files, pasting them into one sheet and repairing what did not line up. The report existed only after that work was done, so it was produced rarely.

• The check: time it once. From "I want hours by client for last month" to a figure you would sign off on.
• The fix: keep every person's file in the same folder with the same column layout, and use Excel's "Get Data from Folder" feature to combine them. The combined sheet refreshes with one click, and a pivot table on top of it gives you client, partner and assignment views.

Two smaller habits that help

• Never delete a client from the master list. Mark it inactive and hide it from the dropdown. Deleting it changes what old reports say.
• Give the closing date to the calendar, not to a reminder email. Fix it as a rule, for example, the second working day after the fortnight ends, so that nobody has to remember to announce it.

When Excel is no longer enough

All four fixes can be done in Excel, and for a firm of ten or fifteen people they are usually sufficient. They start to strain when the client list runs into hundreds and several managers need their own view, because the protection and the consolidation both depend on people following the routine.

At that point the same rules can be built into a small system that the firm runs on its own server: the client carries its group, the period locks itself on the date, and each person sees only what their role needs. That is what I built for the firm above, and it has been in daily use since August 2026.

The author builds internal tools and workflow automation for Indian firms.