Should I use the Additional Information section on the Common App?

Use it ONLY if you have substantive context admissions wouldn't otherwise have: a health event affecting a specific period, an activity that doesn't fit the 10-slot list, family responsibilities not visible elsewhere, or unique circumstances about your school. Don't use it for marketing, restating activities, or excuse-making. Empty reads better than padded.

How long should the Additional Information section be?

100-300 words is typically ideal; 650 is the cap. Brief is better than long. The goal is to add context, not to write another essay. If you can convey the substance in 150 words, do that — admissions readers appreciate brevity.

Should I explain a bad grade in the Additional Information section?

Only if there's substantive cause — a documented health event, family illness, or significant circumstance — and only briefly (2-4 sentences). Do NOT use it for excuses ('the teacher was unfair'; 'the class was harder than expected'). Those weaken your application. Letting a counselor address grade context in their letter is often stronger.

Can I use the Additional Information section for extra activities?

Yes, if you have substantive activities that don't fit the 10-slot Common App list. Be brief and specific. Bullet points are fine. Don't pad with light commitments — only add activities at the same level of substance as your top 10. If your top 10 already cover your real involvement, leave the section blank.

How to Write the Additional Information Section

The Common App's Additional Information section is a 650-word optional space at the end of your application. Most students agonize over whether to use it. The right answer depends entirely on what you'd put in it.

What the Additional Information section is for

It's for context that admissions wouldn't otherwise have. Examples of legitimate uses:

A health condition or family event that explains a specific period of academic decline.
An activity that doesn't fit in the 10-slot activities list (e.g., you have 12 substantive activities).
A research project or independent work that needs more space than the activities list allows.
A unique circumstance about your school (e.g., your school doesn't offer APs because of curriculum policy, or your school just shut down).
Family responsibilities not visible elsewhere (you work 30 hours/week as primary income earner; you're a primary caregiver for a sibling).
A grade or course that needs context (the C in AP Chem followed your hospitalization; the W came after a teacher's documented mid-semester departure).

What it's NOT for

Restating your activities list. Admissions can read both. Don't repeat.
Continuing your personal essay. The essay is 650 words; if you need more space, your essay should be tighter.
Listing additional awards (use the Honors section).
Generic 'I'm passionate about learning' statements. The Additional Info section is not for marketing.
Excuses without substance ('I didn't like the teacher'; 'the class was harder than I expected').
Apologies for parts of your application. Don't apologize; explain context if relevant.

When admissions reads the Additional Information section as a red flag

When it's filled with marketing language about your candidacy.
When it's a 600-word continuation of your essay.
When it's a list of 5 additional awards that should have been in the Honors section.
When it explains a B with non-substantive reasoning ('the teacher was unfair').
When the explanation contradicts other parts of your application.

Format and tone

Brief is better than long. 100-300 words is a typical good length; 650 is the cap.
Factual and direct. Avoid emotional language; avoid pleading.
Specific. 'Family medical event' beats 'difficult time at home.' (You don't need to share private details, but specificity makes it credible.)
Self-aware. Acknowledge what was within your control even when context explains the rest.
Bullet points are fine for activity lists. Prose is better for explanations.

Examples of what works

Example 1: Activity overflow

'The 10-slot activities list doesn't capture two activities I've sustained for 3+ years: I've published 12 articles in my school newspaper as the long-form features writer (covering school district budget shifts, COVID-era learning loss, and the spring 2024 teacher walkout). Separately, I've been building an open-source iOS app for community-college-bound students since junior year — currently 2,300 active users, code on GitHub.'

Example 2: Grade context

'My junior fall transcript shows a C in AP US History and a B+ in AP Calculus AB. In October, my mother was diagnosed with stage 3 cancer. I missed 4 weeks of school as her primary caregiver during chemotherapy. The C reflects that period; my second-semester grades returned to my pre-illness pattern. I share this because I want admissions to read my transcript with this context.'

Example 3: School context

'My high school does not offer Advanced Placement courses; we follow the IB Diploma program exclusively. My six IB courses (3 HL: Chemistry, Mathematics, English Literature; 3 SL: Physics, Spanish, History) represent the most rigorous curriculum available at my school. I've listed predicted scores; final scores are released in July.'

Examples of what doesn't work

Example 4: Don't

'I'm passionate about learning and I've always wanted to attend [School]. My experiences have shown me that I'm a leader and a team player...' — This is marketing, not context. Cut entirely.

Example 5: Don't

'The B in AP Chemistry was unfair. The teacher graded harshly. My friend got an A doing similar work...' — This is excuse-making, not context. Reads negatively.

The honest test

If admissions read your application without the Additional Information section, would they have a less-complete picture in a way that disadvantages you? If yes, use the section to fix that. If your application is already complete, leave it blank. Empty space reads better than padding.

The Common App Additional Information section: when to use, when to skip