A template for the style guide that keeps recurring reports consistent in language, numbers, formatting and tone. It is the practical companion to Report Style Guide.

A style guide is what stops a report changing character with its author. It is short, specific, and applied every cycle – and its tests are the ones readers never consciously notice but always feel.

Consistency is invisible when it is right and jarring when it is not. A style guide is how you get the first.

What the template covers

The guide is organized into sections you can adopt, trim or extend.

Numbers and units

  • How figures are formatted – thousands separators, decimal places, rounding.
  • When to use a percentage versus a percentage point.
  • Units and currency conventions, stated once.
  • How to present ranges and estimates.

Dates and periods

  • Date format, and the format for periods (“Q3 2026”, “the quarter to 30 September”).
  • How to refer to the prior period, consistently.
  • How to label a period-to-date figure as opposed to a full-period figure.

Labels and qualifiers

  • How estimates, forecasts and provisional figures are labeled.
  • How to mark a figure that has been restated.
  • How to reference a source.

Language and tone

  • Active voice, plain language, US English spelling.
  • The words to avoid – “leverage”, “robust”, “significant” without a number.
  • Sentence and paragraph length, kept short for a reader with minutes.

Structure and formatting

  • Section order and headings.
  • Exhibit conventions – titles, notes, sources.
  • Length targets for each section.

Terminology

  • The terms used for your business, products and audiences.
  • The metric names, taken from the metric dictionary.

Applying it

A style guide only works if it is applied where the writing happens.

  • Attach it to the report template, so a producer sees it in context.
  • Reference it in review, so consistency issues are caught before issue.
  • Keep it under five pages, or it will not be read.
  • Version it, and communicate changes deliberately.
  • Update it from disputes, so it grows to cover the cases that caused friction.

The most common failure is a style guide that is comprehensive and unread. A short guide applied consistently beats a thorough one that no one opens.

Common mistakes

  • No numbers section. The majority of consistency issues are numeric, not verbal, and the numbers section is the one most often left out.
  • No labels convention. Estimates and forecasts blend into actuals.
  • Too long. The guide is abandoned after the first cycle.
  • Not versioned. Different producers apply different versions.
  • Not referenced in review. The guide exists but never bites.

Frequently asked questions

What should a report style guide contain?

Conventions for numbers and units, dates and periods, labels and qualifiers, language and tone, structure and formatting, and terminology – including the metric names from your dictionary.

How long should a style guide be?

Under five pages. It needs to be read and applied, and a short guide that is used beats a thorough one that is filed.

Who owns the style guide?

The reporting owner, updated from disputes and reviewed at least annually. Any change should be versioned and communicated.

Does the style guide replace the metric dictionary?

No. The dictionary defines what a metric means and where it comes from; the style guide says how it is written and formatted. Keep the two separate and cross-reference them.

Should the style guide be shared with report contributors?

Yes. Contributors who write a section are the ones most likely to introduce inconsistency, and the ones most helped by a short guide.

How do you enforce a style guide?

Reference it in the review step, so a report that breaches it is caught before issue. Enforcement happens in review, not in a policy document.

Next step

Adopt the sections that apply, keep it under five pages, attach it to the template and reference it in review. If you would like a guide built around your reports, book a pilot call.

Sources

  • Style convention follows standard editorial and financial-reporting practice: consistency of numbers, units, labels, terminology and structure across recurring documents.

No statistic in this asset is invented; where a figure appears in the linked guides, it is cited there with its source and date.