What's the most common TOEFL Writing mistake overall?

Staying too general in Write for an Academic Discussion — vague statements that could apply to almost any prompt. Adding one specific, concrete example is usually the highest-leverage single fix across all three tasks.

Do grammar mistakes matter more than content mistakes on TOEFL Writing?

No — task completion (fully addressing the prompt) is scored as its own criterion, and missing a required point typically costs more than a minor grammar slip.

Is Build a Sentence graded the same way as the other two Writing tasks?

No — it has a single correct grammatical arrangement rather than a range of response quality, so the mistakes there are about word choice and sequencing, not the content-completion mistakes that affect Write an Email and Academic Discussion.

10 TOEFL Writing Mistakes That Lower Your Score

Most Writing score loss is a small, repeatable set of habits rather than a fundamental grammar gap. Here are the 10 most common mistakes across all three tasks, and the specific fix for each.

Not sure where you stand?

Take the free TOEFL Benchmark Test and get your estimated band score in about 45 minutes.

Start Free Benchmark Test

Build a Sentence Mistakes

Picking a plausible-looking decoy word. The word bank often includes a near-identical word with the wrong tense or form — check that your choice is grammatically correct, not just plausible-sounding.
Rushing and misplacing an adverb or modifier. There's a single correct arrangement — most errors come from moving too fast, not from not knowing the grammar rule.

Write an Email Mistakes

Missing one of the required content points. Content coverage matters most — an email with minor grammar errors that addresses every point outscores a clean email that misses one.
Writing well outside the 100-120 word range. Too short usually means underdeveloped content; too long risks padding that doesn't add real information within a 7-minute limit.
Wrong tone for the scenario. Tone should match the situation — not every email needs to be formal, but it does need to fit the specific context given.
Over-investing in the greeting and closing. A brief, appropriately-toned opening and sign-off is enough — most of your words and time should go toward the required content.

Write for an Academic Discussion Mistakes

Staying too general. Phrases like "it is important" could apply to almost any prompt — one specific, concrete example is usually the single highest-leverage fix.
Not engaging with the other posts. Directly referencing a classmate's viewpoint — agreeing, disagreeing, or building on it — is part of fully completing this specific task.
Restating the question instead of taking a position. A clear, stated position supported by one well-developed reason scores higher than vague agreement with no real stance.
Acknowledging a counterpoint without resolving it. Simply mentioning the other side isn't enough — a genuine, brief response to it is what separates a stronger response from an average one.

Not sure where you stand?

Take the free TOEFL Benchmark Test and get your estimated band score in about 45 minutes.

Start Free Benchmark Test

The Fastest Way to Catch These in Yourself

Check your own practice responses against this list directly after writing them, while the prompt is still fresh — it's much easier to spot a missed content point or an overly general sentence on a re-read than while you're still composing. See our full Writing rubric guide for the complete scoring breakdown behind each of these.

Frequently Asked Questions

Get feedback that catches these exact patterns

Practice all three Writing tasks with instant AI-graded feedback.

Explore TOEFL Practice Tests