How To Write The Common App Additional Information Section: Complete Guide with Examples (2026)

The Additional Information section is an optional 300-word box on the Common App for context that doesn't fit anywhere else: an activity that needs more room than a 150-character Activities List entry, an academic decision that needs a sentence of explanation, or a circumstance a reader would otherwise misread. The limit is 300 words for first-year applicants (down from 650, starting with the 2025-26 cycle) and 1,500 characters for transfers. Hardship that shaped your transcript belongs in the separate Challenges and Circumstances section (250 words) instead. The sorting rule: if it describes a specific activity, it belongs in the Activities List; if it's context, it belongs in Additional Information. Most students leave it blank, and a blank box has never hurt an application.

Every guide to the Additional Information Section says the same thing: it's optional, only use it if you need it.

That's true. It's also not the question the students really ask.

The question is more specific: I've got things that don't fit anywhere else on the Common App: a research project, a schedule conflict, a stretch where my grades dipped, an activity I can't explain in 150 characters. Where do they go?

That's a space problem. You're working with a 300-word Additional Information box and ten 150-character Activities List entries, so the actual issue is knowing which sentence belongs in which box.

This guide walks through that choice. What the Additional Information section is for, what to put in it, what to leave out, and how it works together with your Activities section so nothing falls through the cracks.

What Is the Common App Additional Information Section?

The Additional Information section is an optional 300-word box on the Common App where you can explain anything important that doesn't fit anywhere else in your application. It appears immediately after the page for the Personal Essay.

For first-year applicants, the limit is 300 words. That's down from 650 words, a change the Common App made starting with the 2025–26 cycle. Transfer applicants get 1,500 characters. The cut was deliberate. The Common App found that the longer box invited padding, students treating it as a second essay or an extended resume instead of a place for quick, useful context.

Additional Information is for an activity that needs more room, a research project, a scheduling decision that needs a sentence of context, an honest explanation for something a reader might otherwise misread.

If your situation is a hardship that shaped your transcript, that's Challenges and Circumstances. If it's context, an explanation, or overflow, that's Additional Information. Some students will use both. Most will use neither. Many of my students have been accepted to top universities without using the Additional Information section.

The Real Decision: Activities List or Additional Information?

Overflow content belongs in the Activities List if it describes a specific activity, and in Additional Information if it's context that helps a reader understand something elsewhere in the application. Here's the part most guides skip. You don't have one optional box. You have eleven: ten Activities List entries at 150 characters each, plus the Additional Information box at 300 words. Before you write a single sentence for Additional Information, you need to know where everything else is going.

If what you want to say describes a specific activity, something with a role, a time commitment, and a result, it belongs in the Activities List. That's true even if it doesn't fit in 150 characters. You have two options here: trim the description down to the load-bearing facts, or list it as its own entry and add a short note like "(see Add Info)" at the end, then expand on it in the Additional Information box.

If what you want to say is context, something that helps a reader understand a decision, a gap, or a number that would otherwise look strange, it belongs in Additional Information. It's not an activity. It's the sentence that makes an activity, or a transcript, or a choice, make sense.

This is where focused thinking actually shows up on the Common App, not in your personal statement, but in how cleanly you sort fifteen things you could mention into the eleven boxes you actually have. A student who dumps everything into Additional Information because the Activities List felt too cramped is showing a reader the opposite of focus. A student who picks the three things that actually need explaining, and trusts the Activities List to do the rest, is showing exactly the kind of judgment admissions officers are checking for.

Before you write anything, make a list of every loose thread, every activity that got cut short, every grade or gap that might raise a question, every accomplishment with nowhere to live. Then sort each one: Activities List entry, Activities List with a pointer to Additional Information, or Additional Information on its own. Most things will sort cleanly. The ones that don't are usually the ones you should leave out entirely.

What Belongs in the Additional Information Section

Most strong Additional Information entries fall into three categories: an activity that needs more room than the Activities List allows, academic context that would otherwise look strange, or an unusual circumstance that needs a sentence, not an essay.

An Activity That Needs More Room Than 150 Characters Allows

Some activities are hard to compress for good reason: a research project with a methodology worth naming, a multi-year role with several distinct phases, a self-directed project that doesn't map onto a normal extracurricular category. In these cases, the Activities List entry stays short and factual, and the Additional Information box picks up where it left off.

Activities List entry:

Position: Independent Researcher

Organization: Self-directed (see Add'l Info)

Description: Designed and ran a 6-month water quality study of 3 local streams; presented findings to town council

Additional Information:

My stream study began after I noticed warning signs near a creek behind my house. I taught myself basic water chemistry through online coursework, then tested pH, nitrate, and turbidity levels at three sites over six months, sampling weekly. I built a simple database to track trends and found nitrate spikes that lined up with fertilizer runoff after heavy rain. I presented the findings to my town council, which is now considering a buffer zone ordinance near two of the sites. The project took about 80 hours total, mostly outside of any class or program.

Notice what the Additional Information paragraph does that the Activities List entry can't: it explains the "why," names the specific finding, and gives the reader a result they can picture. It's still factual. It's not an essay; it's an extended fact.

Academic Context That Would Otherwise Look Strange

If you made an unusual academic choice or your transcript has something a reader might misread without context, a short, factual explanation helps more than silence does.

My school only offers AP Biology and AP Chemistry in the same period senior year, so I had to choose one. I chose AP Chemistry because it builds more directly on the materials science research I've been doing since sophomore year. I'm continuing biology independently through a community college course this fall.

That's 54 words. It answers the question a reader might otherwise have to guess at, and it stops there.

An Unusual Circumstance That Needs a Sentence, Not an Essay

Not every circumstance rises to the level of Challenges and Circumstances, and not every circumstance needs to. Sometimes a reader just needs one fact they wouldn't otherwise have.

I worked 20 hours a week at my family's restaurant throughout high school, which is why my extracurricular list outside of work is shorter than most applicants'. The job taught me to manage a kitchen schedule, train new staff, and handle a Friday night rush, skills I don't think I'd have built anywhere else.

This isn't an excuse. It's information the reader needs to read the rest of the application correctly. That's the test for whether something belongs here at all: does this help the reader understand something they'd otherwise misread, or am I just adding more?

What Doesn't Belong in the Additional Information Section

A second personal statement, a repeated resume, an excuse for a single low grade, and a portfolio link all belong somewhere else, not here. A few things are worth ruling out before you start drafting.

• Skip the second personal statement. If you're telling a story with a narrative arc, an opening, a turn, a reflection, you're writing an essay, and this isn't the place for one. Readers have said directly that if they wanted another essay, they'd have asked for one.

• Don't repeat your resume. If something is already covered in your Activities List, your personal statement, or your supplements, repeating it here costs you credibility instead of buying you anything.

• Leave a single low grade alone. A B in one class doesn't need a defense. Readers know one grade doesn't define a transcript, and an explanation for something minor can read as a lack of perspective.

• And keep portfolios out of it. Links to outside work, websites, or galleries belong in the sections built for that, not pasted into a text box a reader may not have time to click through.

If you've gone through your loose threads and nothing survives this filter, leaving the section blank is the right call. An empty Additional Information box has never hurt an application. A crowded one sometimes has.

Common App Additional Information Section: Frequently Asked Questions

What is the word limit for the Common App Additional Information section?

First-year applicants have a 300-word limit, reduced from 650 words starting with the 2025–26 application cycle. Transfer applicants have a 1,500-character limit. The shorter limit is intentional. The Common App made the change after finding that longer boxes encouraged padding rather than useful context.

Do I have to fill out the Additional Information section?

No. It's entirely optional, and most students leave it blank. Admissions officers don't penalize a blank Additional Information box. The section exists for students who have specific context, overflow from an activity, or a brief explanation that actually helps a reader understand the rest of the application, not for students looking to fill space.

What's the difference between Additional Information and Challenges and Circumstances?

Challenges and Circumstances (250 words) is for hardship that affected your academic record, things like a family crisis, housing instability, or a serious health issue. Additional Information (300 words) is broader: context that doesn't rise to the level of hardship, an overflow activity, an academic decision that needs explaining, or any other detail a reader would otherwise misread.

Can I use the Additional Information section to explain a low grade?

Only if the grade or pattern is significant enough that a reader might actually misread your transcript without context, and the cause was something outside your control. A single B doesn't need defending. A semester-long drop tied to a documented circumstance is worth one or two factual sentences, not an extended explanation.

Can I include a resume or a link to my portfolio in the Additional Information section?

It's better not to. Readers often don't have time to click outside links, and a resume largely repeats what's already in your Activities List. If you have an activity that needs more space than the Activities List allows, expand on it directly in the Additional Information text instead of pointing to an outside document.

Can I use the Additional Information section to expand on an activity from my Activities List?

Yes, this is one of the most common and effective uses of the section. Keep the Activities List entry short and factual, add a brief note like "(see Add'l Info)," then use the 300 words to explain the methodology, the result, or the scope in more detail than 150 characters allows.