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The #1 FAFSA Mistake High School Seniors Make—and How to Avoid It

For high school seniors and their families, completing the Free Application for Federal Student Aid—better known as the FAFSA—is one of the most important steps in preparing for college. Yet the #1 FAFSA mistake is: not filing at all! Reasons for non-filers range from complications in completing the form to assuming they won’t qualify.

While Gallup polling found roughly 25% of FAFSA filers reported some degree of difficulty, a significant amount of the friction experienced can be mitigated by preparing ahead and utilizing FAFSA’s own online support tools. As far as higher income as a deterrent for filing, it’s important to note that there is no income maximum cut-off that disqualifies applicants.

The other top mistake next to not filing is delayed filing. Financial aid experts recommend submitting the FAFSA as soon as it becomes available. Although the federal filing period remains open much longer, many colleges, states and scholarship programs have earlier deadlines. Some types of financial aid are also limited and may be awarded on a first-come, first-served basis.

For current high school seniors graduating Spring 2027, the FAFSA application opens for 2027-2028 on October 1, 2026.

Complete the FAFSA When It Opens

The FAFSA is used to determine a student’s eligibility for several forms of college financial assistance, including:

• Federal grants, including the Pell Grant
• Federal work-study opportunities
• Federal student loans
• State financial aid programs
• College and university grants
• Certain scholarships offered by schools and private organizations

Completing the FAFSA is free, and filing the form does not obligate a student to accept loans or enroll at a particular college. It simply allows the student to be considered for available financial aid. Federal Student Aid also emphasizes that states, colleges and some private aid providers use FAFSA information when awarding their own assistance.

Even families who believe they will not qualify for need-based aid should consider submitting the FAFSA. Financial circumstances are only one part of the process, and some colleges and scholarship programs require a completed FAFSA before considering a student for institutional funding.

Important FAFSA Dates for the Class of 2027

August–September 2026: Prepare Before the FAFSA Opens

Students and required parent contributors should create their own individual StudentAid.gov accounts before beginning the application. Each contributor must use a separate account. Parents and students should not create accounts for one another or share usernames and passwords. These accounts are used to enter information and provide legally binding electronic signatures. Families should also begin gathering the information they may need, including:

• Student and parent Social Security numbers, when applicable
• Legal names and dates of birth
• Current email addresses
• Records of cash, checking and savings accounts
• Investment information
• Records of child support received
• Information about businesses or income-producing farms, when applicable
• A preliminary list of colleges the student may attend

The 2027–28 FAFSA will use financial information from 2025 federal tax returns. Much of this information may be transferred directly via FAFSA’s IRS Data Exchange tool after each required contributor provides consent.

No Later Than October 1, 2026: FAFSA Availability

The U.S. Department of Education has announced that the 2027–28 FAFSA is scheduled to be available to all applicants no later than October 1, 2026. A limited beta-testing process begins before the nationwide release. Students should check the official Federal Student Aid website as October approaches in case the form becomes generally available before October 1.

October–November 2026: Submit as Early as Possible

Students should aim to complete and submit the FAFSA shortly after it becomes available—ideally during October or November. Do not wait until every college application has been submitted or until the student has made a final college decision. Students may list colleges they are considering and update that list later when necessary. The goal is to submit the FAFSA before the earliest financial aid deadline among the student’s colleges and state programs.

Fall 2026–Spring 2027: Watch Individual College Deadlines

There is no single priority deadline that applies to every college. Each state and institution may establish its own financial aid deadline, and some programs have limited funding. Federal Student Aid advises families to check every school’s requirements and submit before the applicable state and college deadlines. Students should create a simple financial aid calendar that includes:

• Each college’s FAFSA priority deadline
• State financial aid deadlines
• Scholarship application deadlines
• Additional institutional financial aid forms
• Requests for verification or supporting documents

The earliest deadline on that list should become the family’s working FAFSA deadline.

June 30, 2028: Expected Final Federal Deadline

The 2027–28 financial aid year covers attendance between July 1, 2027, and June 30, 2028. Based on the standard federal schedule, the final federal FAFSA deadline is expected to be June 30, 2028. Families should confirm the officially published deadline when the 2027–28 form becomes available. However, seniors should never plan to wait until this date. By then, many state, college and scholarship deadlines will have passed, and limited funding may already have been distributed.

Additional FAFSA Mistakes Seniors Should Avoid

Using Incorrect Personal Information

Names, Social Security numbers and birthdates should match the information associated with each person’s StudentAid.gov account and official records. Even a small discrepancy may delay processing.

Inviting the Wrong Parent

Students with divorced, separated or remarried parents may be unsure which parent must participate. Federal Student Aid provides a “Who’s My FAFSA Parent?” tool to help families identify the appropriate contributor.

Leaving the FAFSA Incomplete

A student may finish their section while a parent contributor’s section remains unfinished. The FAFSA cannot be fully submitted until all required contributors provide their information, consent and signatures.

Reporting the Wrong Financial Information

Families completing the 2027–28 FAFSA should use the requested 2025 tax information. They should carefully follow the application instructions rather than estimating figures or entering information from a different tax year.

Ignoring Follow-Up Messages

After submitting the FAFSA, students should review their FAFSA Submission Summary and monitor email and college portals. A school may request verification documents, corrections or additional information before completing the student’s financial aid offer.

Start Early and Stay Organized

The FAFSA does not need to become another last-minute senior-year emergency. Preparing accounts and documents ahead of time allows families to complete the form more efficiently once it opens. Filing early also gives students time to correct errors, respond to college requests and meet the earliest financial aid deadlines on their list.

Excel Academy helps high school students stay organized throughout the college-planning process—from developing a balanced college list and managing application deadlines to strengthening essays and identifying scholarship opportunities.

The most important FAFSA reminder for every senior is simple: Do not wait. Prepare now, file early and follow up carefully.

FAFSA requirements and deadlines may change. Families should verify current information through Federal Student Aid and the financial aid offices of the colleges under consideration.