FAFSA household size confusion - adult child living at home but files taxes independently
I'm confused about how to report household size on the 2025-2026 FAFSA. My daughter (19) is in her sophomore year, and we included our household as 4 people (me, spouse, daughter in college, and our younger son who's 15). But we also have our oldest son (24) who lives with us while working part-time and attending grad school. He files his own taxes independently and pays us a small amount for rent. The FAFSA system accepted our submission with household size 4, but now I'm wondering if it should be 5 since our older son lives with us more than half the year. When I called my daughter's financial aid office, they brushed it off saying changing the household size "wouldn't affect her aid package" but I'm worried about accuracy for future FAFSAs. My younger son still has 3 years before college, and my daughter has 2 more years. Should I submit a correction to increase our household size to 5? Will this trigger some kind of review or flag our application? I don't want to mess up her current aid, but I also want to make sure we're reporting correctly for future years.
42 comments


Connor Murphy
You've run into a common FAFSA household size question! The official rule is that your household includes: 1. You and your spouse 2. Your children (even if they don't live with you) IF they receive more than half their support from you 3. Other people IF they live with you AND receive more than half their support from you The key for your 24-year-old son is whether he receives more than half his support from you. If he pays rent, files independently, and supports himself mostly, then he's NOT counted in your FAFSA household, even if he lives with you. The college's financial aid office is probably right that it won't affect your daughter's aid calculation much since her older brother is over 23 and not in undergraduate school.
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Lucy Taylor
•Thank you for explaining this! Since he pays for his own expenses and we don't claim him as a dependent on taxes, I guess we did report correctly with household size 4. I just wasn't sure if physical residence trumped financial support in the FAFSA calculations.
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KhalilStar
we had EXACTLY this situation last yr!!! my oldest daughter (22) lives at home but has fulltime job and files her own taxes. financial aid ppl told us NOT to count her in household size even tho she eats our food lol. they said its about financial support not where they sleep
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Lucy Taylor
•That's reassuring to hear someone else had the same situation! Did you ever have to provide any documentation to prove your household size?
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KhalilStar
•nope never had to prove anything! but my daughter DID get selected for verification one yr and they asked for tax transcripts but nothing about household stuff
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Amelia Dietrich
The financial aid officer is correct that this specific change likely won't affect your Expected Family Contribution (now called the Student Aid Index or SAI). Here's why: adult students who are not in undergraduate programs AND who are over 23 have minimal impact on the formula, especially if they're financially independent. However, I always recommend being 100% accurate on your FAFSA. If you're selected for verification later (about 30% of FAFSA filers are), any discrepancies could cause delays or complications. If you want to be extremely precise: calculate whether you provide more than 50% of his support. Factor in the fair market value of housing (even with his small rent contribution), food, utilities, phone plans, health insurance, etc. If it's close to 50%, document your calculation in case of verification.
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Kaiya Rivera
•NOT TRUE! our fafsa got flagged for "verification" last year and it was a NIGHTMARE!!!!! we had a similar situation and the aid office made us provide rent receipts, utility bills, everything to prove our household size. it delayed my son's aid package by 3 months!
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Amelia Dietrich
•I'm sorry you had that experience. Verification experiences can vary widely between institutions. This is why I recommended documenting the support calculation - some schools are more stringent than others during verification. Your situation highlights why accuracy upfront is important.
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Katherine Ziminski
Anyone else think its RIDICULOUS how complicated they make this whole process??? Like why can't they just ask "who lives in your house" and be done with it? So many rules and exceptions!
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Noah Irving
•Because people would game the system. They're trying to assess true financial need, not just who happens to sleep under your roof. But I agree the FAFSA could definitely be more user-friendly with clearer explanations!
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Vanessa Chang
I spent 3 hours on hold with Federal Student Aid trying to get this exact question answered last year. After being disconnected twice, I found Claimyr.com which got me through to an actual FAFSA agent in about 15 minutes. They have a service that keeps your place in line and calls you when an agent is available. Saved me hours of frustration! They have a video showing how it works: https://youtu.be/TbC8dZQWYNQ Anyway, the FAFSA agent told me household size is based on who you FINANCIALLY support more than 50%, not just who lives with you. My 25-year-old daughter who lives at home but has a full-time job wasn't counted in our household size.
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Lucy Taylor
•Thanks for the Claimyr tip! I might need that if any issues come up. Did the FAFSA agent suggest submitting a correction for household size, or just leaving it as is if it's already been processed?
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Vanessa Chang
•They told me if the current numbers accurately reflect who you financially support (not just who lives with you), then no correction is needed. They said making unnecessary corrections can sometimes trigger verification reviews, so only fix actual mistakes.
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Noah Irving
I'm a financial aid counselor, and I can tell you this is one of our most common questions! Here's the practical advice I give families: 1. The FAFSA household size question is about FINANCIAL support, not physical residence 2. Your 24-year-old son who files independently and pays rent is correctly excluded from your household count 3. The SAI formula gives very little weight to older non-undergraduate household members anyway 4. If you're providing less than 50% of his support, keep your household size at 4 Don't overthink this - the financial aid officer at your daughter's school is correct. Making a correction now could potentially flag your application for verification, which means more paperwork and potential delays for no benefit.
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Lucy Taylor
•Thank you for the professional perspective! That makes me feel much better about our submission. Is there any documentation I should keep on hand just in case we're selected for verification later?
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Noah Irving
•If you're selected for verification, typically you might need: - Tax returns/transcripts for parents and student - Documentation of untaxed income - Household size verification worksheet For the household worksheet, having a basic summary of your son's financial situation (approximate income, expenses he covers himself vs. what you provide) would be helpful. Some schools may request proof that he provides more than 50% of his own support.
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Kaiya Rivera
I'm FREAKING OUT reading this thread because we DID include our 25-year-old daughter who lives with us but works full-time in our household size!!! We just submitted last week!!! Do we need to correct this ASAP???!!!
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Noah Irving
•Don't panic! Evaluate whether you provide more than 50% of her support. If she's financially independent (pays for most of her own expenses, files her own taxes), then yes, submit a correction to reduce your household size. If you truly do provide more than half her support despite her job, then your current submission is correct.
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Kaiya Rivera
•Ok im trying to breathe lol. She pays us $400/month for rent and buys her own food but we pay utilities/internet/netflix that she uses and her health insurance is through us until 26. Is there some calculator to figure out the 50% thing???
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Noah Irving
•There's no official calculator, but you can create a simple spreadsheet: 1. Estimate ALL her annual expenses (fair market rent would be higher than $400, food, clothing, transportation, phone, insurance, etc.) 2. Calculate what portion you pay (health insurance, difference between $400 and actual rental value, utilities, etc.) 3. Divide what you pay by her total expenses If it's under 50%, submit a correction. If it's over 50%, keep it as is. If it's borderline, document your calculation in case of verification.
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Katherine Ziminski
my cousins bfs sister got audited by fasfa and they made her pay back $4000 in grants because she reported wrong household size so BE CAREFUL!!!
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Amelia Dietrich
•This is extremely rare and typically only happens in cases of intentional misrepresentation, not honest confusion about FAFSA rules. The FAFSA doesn't conduct "audits" the way the IRS does - they have a verification process that may require documentation, but if you respond promptly and honestly, there are typically no penalties for unintentional errors.
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Miguel Hernández
As someone who just went through this exact situation with my 23-year-old son, I can confirm that household size is definitely about financial support, not residence. My son lives with us but works full-time and pays for his own car, phone, food, etc. We only provide housing (he pays us rent) and he's on our health insurance until 26. When I calculated it out, we were providing maybe 30% of his total support, so we correctly excluded him from our FAFSA household size. The financial aid office at my daughter's school actually praised us for getting it right because they said so many families include adult children who are financially independent. One tip: if you're ever unsure about the 50% support calculation, think about it this way - if your adult child moved out tomorrow, would your family's expenses decrease significantly? If not, they're probably supporting themselves and shouldn't be counted in your household size.
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Malik Davis
•That's such a helpful way to think about it! The "would your expenses decrease significantly if they moved out" test makes it much clearer than trying to calculate exact percentages. I think that confirms we did report correctly with household size 4, since our main expenses wouldn't really change if our 24-year-old moved out - we'd still have the same mortgage, utilities, groceries for the rest of us, etc. Thanks for sharing your experience!
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KingKongZilla
I'm dealing with a similar situation right now! My 22-year-old daughter graduated last year and moved back home while she saves for her own place. She has a full-time job and pays us $300/month rent, but we still cover her car insurance and she's on our family cell phone plan. Reading through all these responses really helped clarify the 50% support rule. I think the key insight from @Miguel Hernández about whether your expenses would decrease significantly if they moved out is brilliant - that's such an easier way to think about it than trying to calculate exact dollar amounts. For anyone else confused about this, it sounds like the general consensus is: if your adult child files their own taxes, pays their own major expenses, and you're not claiming them as a dependent, they probably shouldn't be counted in your FAFSA household size even if they live with you. The physical address doesn't matter as much as who's actually financially supporting whom. Thanks everyone for sharing your experiences - this thread saved me from making the same mistake!
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Taylor Chen
•This thread has been incredibly helpful! I'm in a similar boat with my 20-year-old who's taking a gap year and working part-time while living at home. The "would your expenses decrease significantly" test really clarifies things. In my case, since we're still paying for most of his expenses (food, car insurance, phone, etc.) and he's only contributing a small amount, it sounds like he should be included in our household size. It's reassuring to see so many people sharing their real experiences rather than just trying to interpret the confusing FAFSA language!
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Natalie Wang
This is such a helpful thread! I'm a newcomer here but dealing with a similar situation. My 21-year-old son lives with us while finishing his associate degree at community college and working part-time. He files his own taxes but we still provide most of his support - we pay for his tuition, car insurance, phone, and most groceries. He only contributes about $200/month from his part-time job. Based on what everyone's shared here, it sounds like since we're providing way more than 50% of his support, we should include him in our household size even though he files independently? The @Miguel Hernández test about "would expenses decrease significantly" is really helpful - our costs would definitely go down a lot if he moved out since we're covering most of his major expenses. I'm planning to submit my younger daughter's FAFSA next month, so this conversation is perfectly timed. Thanks to everyone who shared their real experiences - it makes this confusing process so much clearer!
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Raul Neal
•Yes, you're absolutely right! Since you're covering tuition, car insurance, phone, and most groceries, you're definitely providing more than 50% of his support. The fact that he files his own taxes doesn't automatically exclude him from your household size - it's really about who's financially supporting whom. Your son should definitely be included in your household count for your daughter's FAFSA. It sounds like you have a clear understanding of the support test now, which will help you avoid the confusion that many of us had initially!
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Miguel Silva
This thread has been so educational! As someone new to the FAFSA process (my oldest just started college this year), I had no idea the household size rules were so nuanced. I initially thought it was just about who lives under your roof, but clearly the financial support aspect is what really matters. My situation is a bit different - my 26-year-old stepson occasionally stays with us between apartments but is completely financially independent with his own career. Based on everything shared here, it's clear he shouldn't be counted in our household size even when he's temporarily living with us, since we provide zero financial support. The @Miguel Hernández "expense test" and all the real-world examples from everyone have been incredibly helpful. It's reassuring to see a community where people share actual experiences rather than just guessing at the rules. I feel much more confident about filling out future FAFSAs correctly now!
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Zoe Alexopoulos
•Welcome to the FAFSA community! You're absolutely right that your stepson shouldn't be counted since he's financially independent - even temporary residence doesn't matter if there's no support being provided. It's great that you're learning these nuances early in the process! I wish I had understood the financial support vs. residence distinction when I first started filling out FAFSAs. This thread really shows how the "expense test" approach cuts through all the confusion. Good luck with your future FAFSA submissions!
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Molly Hansen
As a newcomer to this community, I'm really grateful for this detailed discussion! I'm about to fill out my first FAFSA for my daughter and was completely confused about household size. My 23-year-old son lives with us but works full-time and covers most of his own expenses except health insurance (he's still on our plan until 26). The @Miguel Hernández "expense test" is brilliant - if he moved out, our household expenses really wouldn't change much since he pays for his own food, gas, phone, etc. We'd just lose his small rent contribution. Based on everyone's experiences here, it sounds like he shouldn't be counted in our household size since we're providing way less than 50% of his support. This thread has been more helpful than any official FAFSA guidance I've read! It's amazing how sharing real situations makes these confusing rules so much clearer. Thanks to everyone who took the time to explain their experiences - you've saved me from making a costly mistake on our first FAFSA submission.
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Dmitry Petrov
•Welcome to the community, Molly! You're definitely on the right track with your thinking. Since your son covers his own food, gas, and phone while only receiving health insurance from you, you're clearly providing much less than 50% of his support. The health insurance alone wouldn't push you over that threshold. It's smart that you're getting this figured out before submitting - so many families (myself included initially!) get tripped up by assuming physical residence equals household member. The @Miguel Hernández expense test really is the clearest way to think about it. You ll'do great on your first FAFSA submission with this understanding!
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Anastasia Kozlov
As a newcomer to this community, I found this entire discussion incredibly enlightening! I'm preparing to file my first FAFSA for my twins who will be starting college next fall, and I was completely lost on the household size question. We have a similar situation with my 25-year-old daughter who moved back home after grad school while job hunting. She's been here about 8 months now, pays us $400/month rent, and covers her own car payment and student loans, but we're still paying for her health insurance, groceries, and utilities. Using the @Miguel Hernández "expense test" - if she moved out tomorrow, our grocery bill would definitely decrease, we'd lose her rent income but save on utilities and insurance costs. It's probably close to that 50% threshold, which makes me nervous about getting it wrong. Reading through everyone's experiences, especially the verification stories, I'm wondering if I should err on the side of caution and NOT include her in our household size? It sounds like being conservative might avoid potential complications down the road. The last thing I want is to deal with verification issues when my twins are starting college! Thanks to everyone who shared their real-world experiences - this has been more helpful than hours of reading official FAFSA documentation!
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Yuki Kobayashi
•Welcome to the community, Anastasia! Your situation with your 25-year-old daughter sounds like it's right at that tricky 50% threshold. Given that you're providing health insurance, groceries, and utilities while she covers rent, car payment, and loans, I'd recommend doing a quick calculation to be sure. Consider the annual cost of health insurance, groceries for one person, her share of utilities, versus her rent payments ($4,800/year), car payments, and loan payments. If you're truly close to 50%, I'd actually lean toward including her in your household size rather than being "conservative" - the FAFSA values accuracy over caution. The verification stories shared here are mostly about people who made clear mistakes or couldn't document their choices. If you calculate it out and can justify your decision either way, you should be fine. Just keep notes on your reasoning in case you need to explain it later. With twins starting college, getting the household size right could actually impact your aid eligibility more than usual since you'll have two students. Don't let the verification stories scare you into underreporting if she legitimately should be counted! The @Miguel Hernández expense test is helpful, but when it s'borderline like yours, the actual math matters more.
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Olivia Garcia
As a newcomer to this community, I want to thank everyone for this incredibly detailed discussion! I'm currently filling out my first FAFSA for my daughter and was completely overwhelmed by the household size question. My situation is a bit unique - my 22-year-old son is active duty military and stationed overseas, but he still lists our address as his home of record. He's obviously financially independent and doesn't receive any support from us, but I wasn't sure if his military status or having our address on file changed anything. After reading through all these experiences, especially the @Miguel Hernández "expense test," it's clear he shouldn't be counted in our household size since we provide zero financial support. The fact that he uses our address for military purposes doesn't create a support relationship. This thread has been more helpful than any official guidance I've found! It's amazing how real-world examples clarify these confusing rules. I feel much more confident about our FAFSA submission now, knowing that household size is truly about financial support rather than addresses or family relationships. Thanks to everyone who shared their experiences - you've helped another family navigate this process correctly!
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Paolo Moretti
•Welcome to the community, Olivia! You're absolutely correct about your son's situation. Military status actually makes this even clearer - active duty service members are considered financially independent regardless of age or family relationships for FAFSA purposes. The fact that he uses your address as his home of record is purely administrative and has no bearing on household size calculations. Your instincts are spot-on using the @Miguel Hernández expense test - since you provide zero financial support to your son, he definitely shouldn t'be counted in your household size. Military housing, food allowances, healthcare, and salary make him completely self-supporting. It s'great that you re'getting this right from the start! So many military families get confused about the address issue, but you ve'got it figured out. Your FAFSA submission will be accurate, and you won t'have any issues if selected for verification since your son s'military status makes his independence crystal clear. Good luck with your daughter s'college journey!
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Sofía Rodríguez
As a newcomer to this community, I'm so grateful I found this thread! I'm preparing to submit my first FAFSA for my son and was completely confused about household size rules. My situation: I'm a single parent with my 19-year-old son (the college applicant) and my 23-year-old daughter who moved back home after college graduation 6 months ago. She's working full-time as a teacher but living with us while saving for a house down payment. She pays me $500/month rent and buys her own groceries, but I still cover her car insurance and phone plan since they're family plans. Reading everyone's experiences here, especially the @Miguel Hernández "expense test," has been so clarifying! If my daughter moved out tomorrow, I'd lose her rent money but save on car insurance and phone costs, and my grocery/utility bills wouldn't change much since she buys her own food. It seems like she's supporting herself for the most part. Based on all the advice shared here, I'm thinking my household size should be 2 (just me and my college-bound son), not 3. Does this sound right to everyone? I'd rather get it correct from the start than deal with verification issues later! Thank you all for sharing your real experiences - this has been more helpful than any official FAFSA guide I've read!
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Sofia Morales
•Welcome to the community, Sofía! Based on your description, you're absolutely right that your household size should be 2. Your daughter is clearly financially independent - she's working full-time as a teacher, pays rent, buys her own groceries, and you're only covering relatively minor expenses like car insurance and phone (which are probably cheaper as family plan add-ons anyway). Using the @Miguel Hernández expense test, you nailed it - if she moved out, your major expenses wouldn t'change significantly since she s'covering her own food and paying you rent. The car insurance and phone costs you d'save would probably be less than the rent income you d'lose. As a single parent, getting the household size right is especially important for your aid calculation. You re'being smart to figure this out upfront rather than risk verification complications later. Your instincts are spot-on - stick with household size of 2 for you and your college-bound son. Good luck with your FAFSA submission!
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Elijah Knight
As a newcomer to this community, I just want to say how incredibly helpful this entire thread has been! I'm getting ready to file my first FAFSA for my daughter next month and was completely lost about household size calculations. We have a 21-year-old son who graduated college last year and moved back home while he saves money and looks for a better job. He works part-time at a retail store, pays us $300/month rent, and covers his own car payment and gas. However, we're still paying for his health insurance, groceries, phone plan, and he's on our car insurance policy. After reading all these real experiences and especially the @Miguel Hernández "expense test," I think we're probably providing more than 50% of his support despite his rent contribution. If he moved out tomorrow, our grocery bills would definitely decrease significantly, and we'd save on insurance costs but lose his rent income. I'm planning to include him in our household size of 4 (me, spouse, college daughter, and son at home). This thread has given me so much more confidence about making this decision correctly! Thank you to everyone who shared their experiences - you've made this confusing process so much clearer for families like mine who are new to FAFSA.
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ShadowHunter
•Welcome to the community, Elijah! You're absolutely right to include your son in your household size of 4. Based on your description, you're clearly providing more than 50% of his support - health insurance, groceries, phone plan, and car insurance are all major expenses that far outweigh his $300/month rent contribution. The @Miguel Hernández expense test confirms your thinking - if he moved out, your grocery and insurance costs would decrease significantly, which shows you re'providing substantial support. At $3,600/year in rent from him versus what you re'likely spending on his health insurance alone plus (all the other expenses ,)you re'definitely over that 50% threshold. You re'being smart to figure this out correctly from the start, especially with your daughter heading to college. Getting the household size right can definitely impact your aid eligibility. It sounds like you have a solid understanding of the support test now, which will serve you well for future FAFSA submissions too. Good luck with your first FAFSA - you ve'got this!
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Omar Zaki
As a newcomer to this community, I'm so thankful I found this discussion! I'm preparing my first FAFSA for my daughter and had the exact same confusion about household size. My situation: We have a 20-year-old son who's taking a gap year and living at home while working part-time at a local restaurant. He makes maybe $800/month and gives us $200 for "rent," but we're still covering his health insurance, most groceries, car insurance, phone bill, and basically all his other expenses. The @Miguel Hernández "expense test" is such a game-changer! If my son moved out tomorrow, our expenses would definitely go down significantly - we'd save on groceries, insurance, utilities, etc. Even though he contributes $200/month, we're clearly providing way more than 50% of his support. This thread has been more helpful than hours of reading confusing FAFSA documentation! I feel confident now that we should include him in our household size since we're financially supporting him, even though he has some income. Thank you to everyone who shared their real experiences - you've helped another confused parent navigate this correctly!
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Ravi Sharma
•Welcome to the community, Omar! You're absolutely right to include your son in your household size. With only $800/month income and contributing just $200 for rent, you're clearly providing the vast majority of his support - health insurance alone probably costs more than his annual rent contribution of $2,400! The @Miguel Hernández expense test makes it crystal clear in your case - if he moved out, you d'save significantly on groceries, insurance, utilities, and other expenses. Gap year students living at home and working part-time are classic examples of dependents who should be counted in household size, regardless of having some income. You re'being smart to get this right from the start! Many families mistakenly think any income makes their adult child independent, but it s'really about who provides the majority of support. Your son is clearly still financially dependent on you despite his part-time job. Good luck with your daughter s'FAFSA submission - you ve'got the household size question figured out perfectly!
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