Writing commentary for numbers that change

When the numbers in a report update themselves, the words around them become the weak point. A chart refreshes overnight; the sentence beneath it, written last Tuesday, still says revenue is “holding steady”. Readers see the contradiction immediately, and from that moment they read the whole report with suspicion.

Good commentary for live figures is written differently. It explains rather than repeats, it names its period, and it is honest about what it doesn’t yet know. None of this is complicated. It does require a change of habit.

Stop restating the table

The most common form of report commentary is a sentence that repeats a number already shown: “Revenue for the week was ₹38.2 lakh, up from ₹35.9 lakh.” The table directly above says the same thing.

This kind of sentence adds nothing for the reader and creates a maintenance problem for the writer. When the figure is revised, the table updates and the sentence doesn’t.

Let the table carry the numbers. Use the words for what a table can’t show:

• Cause. Why did it move?
• Context. Is this movement normal, seasonal or unusual?
• Consequence. What does it mean for decisions, targets or next week?

Compare these two versions.

Revenue was ₹38.2 lakh this week, up 6% on last week.

The rise in revenue came almost entirely from two enterprise renewals that had slipped from the previous month. Underlying weekly sales were flat.

The second contains no figure that can go stale and tells the reader something they couldn’t have worked out alone. It works especially well beside a simple bar chart slide: the chart shows the size of the change, and the words explain it.

Date every judgement

Commentary is a judgement made at a point in time. Say when.

A short marker at the top of the commentary section, such as “Written 20 October, on data to 19 October”, tells readers exactly how fresh the explanation is. If the figures above have moved on since, readers can see that the words describe an earlier picture, and they won’t mistake an old explanation for a current one.

This matters most for reports that are read as links rather than attachments. Someone opening a live report on Thursday deserves to know that the commentary dates from Monday.

Write in ranges and directions, not exact figures

Where you do need to refer to a number in prose, refer to it in a way that survives small revisions.

Fragile	Durable
Churn was 2.31%	Churn stayed within its usual range
We added 47 customers	New customer numbers were the highest this quarter
Costs rose by ₹1,12,400	Costs rose, mainly from the new Hyderabad office

The durable versions make claims about direction, comparison and cause. They remain true if a late invoice nudges the figure slightly. If a revision is large enough to change the direction, the commentary should be rewritten anyway.

Where an exact figure genuinely matters in a sentence, link it to the source so it updates with everything else.

Separate what you know from what you suspect

Weekly figures often move before anyone fully understands why. Commentary that pretends to certainty it doesn’t have ages badly: next week’s numbers contradict it, and the reader remembers.

Use plain language to mark the difference.

• Known: “The drop in orders follows the planned price change on 14 October.”
• Likely: “The rise in support tickets appears linked to the app update; we’re confirming with the product team.”
• Unknown: “Conversion fell in the north region. We don’t yet know why and will report back next week.”

The third sentence is uncomfortable to write and valuable to read. It tells the reader the number has been noticed, that nobody is guessing, and when to expect an answer.

Keep a short structure

Commentary that runs to several paragraphs rarely gets read in full. A three-part structure keeps it disciplined:

1. What moved. The one or two changes that matter most this period.
2. Why. The cause, labelled as known, likely or unknown.
3. What next. The action being taken, the decision needed or what to watch.

When the commentary has to open a longer report, the same discipline applies to the summary at the top; this guide on how to write an executive summary covers that larger version.

If nothing significant moved, say so in a single line: “A steady week; no figures outside their normal range.” Readers appreciate being told there’s nothing to worry about, and it is far better than padding. The same three parts work for project updates; how to write a project status report people read applies them to sponsors and milestones.

Review commentary when the data refreshes

Build a quick check into the routine. Each time the figures update, reread the commentary and ask:

• Does any sentence now contradict the table or chart?
• Is the cause still the best explanation?
• Has an “unknown” from last time become known?

If the answer to any of these changes, edit the commentary and update its date. If the report is a snapshot that has already been sent, leave it as it was and correct the record in the next edition.

Let the numbers be live and the words be honest

Live figures remove the drudgery of copying numbers. They also raise the bar for the writing around them, because a stale sentence beside a fresh chart is more noticeable than a stale report.

The habits above (explain rather than restate, date the judgement, prefer direction over precision, mark uncertainty) keep the commentary as trustworthy as the data. For the wider routine that supports this, see how to stop rebuilding the weekly report every Monday.

That division of labour is what Live Documents is for: the figures keep themselves current, and the explanation stays in the hands of the person who understands it.