Reading Level: Who Is This Actually For?

Readability formulas estimate the education needed to read a text easily. They are crude — most just count sentence length and syllables — and they are still useful, because the thing they measure correlates with the thing that matters.

Where things actually sit

Popular fiction and tabloid newspapers — around age 11 to 13
Broadsheet journalism — around age 14 to 16
Most corporate and government writing — university level
Insurance and legal documents — postgraduate

Surveys of adult literacy in English-speaking countries consistently find a large share of adults reading comfortably at around age 11 to 14 level. So a document written at university level is, for a substantial part of its audience, effortful — not impossible, but effortful enough that they stop.

The mistake underneath

Writers pitch high because complexity feels like competence. It does the opposite. Research on this is fairly consistent: readers rate simpler writing as coming from more intelligent authors, and complex writing on a simple idea reads as someone struggling.

The genuinely difficult skill is explaining something complicated in plain language, and readers recognise it.

What lowers the level

Shorter sentences — the biggest single factor in every formula. See sentence length.
Shorter words — usually the Anglo-Saxon option: use not utilise, help not facilitate.
Active constructions — who did what to whom.
Fewer nominalisations — verbs doing the work instead of abstract nouns.
Concrete over abstract — things a reader can picture.

What the formulas cannot see

They count syllables, so they miss almost everything that makes writing hard:

Jargon. Cache is one syllable and opaque to most readers.
Structure. A well-organised long document is easier than a disorganised short one.
Assumed knowledge. The commonest real barrier, and invisible to any formula.
Ambiguity. A short ambiguous sentence scores well and communicates badly.

A text can score at age 10 and be incomprehensible. Use the score as a smoke alarm, not a grade.

Where plain language is required

This is not only good practice. Several governments now mandate it — the United States has a Plain Writing Act, the UK requires accessible public information, and financial regulators in several countries require consumer documents in plain language.

Behind those rules is a finding that keeps recurring: unclear writing costs money. People fill forms in wrongly, call helplines, miss deadlines and take the wrong product.

The practical target

For anything meant for a general audience, aim at around age 12 to 14. That is roughly: average sentence under twenty words, few words over three syllables, and no sentence you have to read twice.

You will not lose your expert readers. Nobody has ever complained that a document was too easy to understand.