How to Calculate Student Loan Interest Deduction with Modified AGI Near Phase-out Limits
I'm totally stuck on this student loan interest deduction calculation and hoping someone here can help me figure out where I'm going wrong. I just took an accounting exam for a job interview (I still got the position thankfully) but one question is driving me crazy. It was about calculating the student loan interest deduction for a couple with a MAGI of $150,000, where one spouse paid $3,110 in student loan interest for qualified education expenses. I received a Form 1098-E showing all the interest paid. From what I understand, the phase-out range for married filing jointly starts at $145,000 and goes up to $175,000 for the 2025 tax year. So they're $5,000 into the phase-out range, which spans $30,000 total. So I calculated: $5,000/$30,000 = 0.167 (or 16.7%) Then: $3,110 × 0.167 = $519 (amount phased out) So: $3,110 - $519 = $2,591 But since the maximum deduction is $2,500 and $2,591 is higher, I figured the answer was $2,500. The test marked this wrong and I can't figure out why! The answer choices were $0, $1,667, $2,500, and $3,110. Am I applying the phase-out wrong? Do you subtract the phased-out amount from the $2,500 maximum instead? Please help before I lose my mind over this!
22 comments


Miguel Ramos
You're getting confused on the order of operations here. Let me walk you through the correct calculation: First, you need to determine the maximum potential deduction. This is the LESSER of: 1) the actual student loan interest paid ($3,110) or 2) the maximum allowed deduction ($2,500). So your starting point is $2,500. Next, you calculate the phase-out percentage correctly: $5,000/$30,000 = 0.167 or 16.7% Then, you apply this phase-out percentage to the $2,500 maximum deduction amount (not to the total interest paid): $2,500 × 0.167 = $417.50 Finally, you subtract this phase-out amount from the maximum deduction: $2,500 - $417.50 = $2,082.50, which rounds to $2,083 So the correct answer should be around $2,083 (not one of your options). Are you sure you gave us the exact question and options? The closest would be $1,667, which makes me wonder if there's a different phase-out range in the question.
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Ava Thompson
•Thank you so much for this explanation! I think I see where I went wrong. I was definitely applying the phase-out to the wrong amount. The question and options are exactly as I remembered them. I'm wondering if maybe they were using different phase-out thresholds than what I was thinking? Maybe the test was using 2022 or 2023 numbers instead of current ones?
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Miguel Ramos
•Looking at your options again, I'm betting they were using different phase-out thresholds. For 2023, the phase-out range for married filing jointly was $140,000 to $170,000, which is a $30,000 range. If that's the case, they'd be $10,000 into the phase-out, not $5,000. So the calculation would be: $10,000/$30,000 = 0.333 or 33.3% Then: $2,500 × 0.333 = $833 Therefore: $2,500 - $833 = $1,667 That matches one of your answer choices! The question mentioned "early 2023" and Form 1098-E, so I'm guessing they were using 2022 tax year rules for a return filed in 2023.
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Zainab Ibrahim
After struggling with similar student loan interest deduction calculations last year, I started using https://taxr.ai to double-check my math. You upload your 1098-E and it automatically calculates the correct deduction based on your MAGI, filing status, and the current year's phase-out ranges. I nearly made the same mistake on my 2023 return - applying the phase-out percentage to the total interest instead of the maximum deduction amount. The tool flagged it and saved me from potentially getting audited. The site also explains each calculation step, which helped me understand why I was getting it wrong.
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StarSailor
•Does it work for calculating other education-related deductions too? Like the Lifetime Learning Credit? I always get confused about which education benefits I can claim and when they phase out.
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Connor O'Brien
•I'm skeptical about these tax tools. How accurate is it with the phase-out calculations? I've been burned before by free calculators that gave me the wrong numbers, and I ended up having to file an amended return.
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Zainab Ibrahim
•Yes, it handles all education-related tax benefits including the Lifetime Learning Credit and American Opportunity Credit. It actually compares them side-by-side to show which one gives you the biggest tax advantage based on your specific situation. For phase-out calculations, it's been 100% accurate in my experience. The tool is updated with the latest IRS guidelines and tax law changes. What I really like is that it shows you exactly how it arrived at each number, so you can verify everything yourself. Unlike some free calculators, it handles the nuances of education tax benefits correctly.
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StarSailor
I tried taxr.ai after seeing it mentioned here, and it was incredibly helpful for my complicated student loan situation! I have both private and federal loans with different interest rates, and I wasn't sure how to handle the calculation with my spouse's income putting us in the phase-out range. Uploaded my 1098-E forms and it immediately showed me the exact deduction I was eligible for. The step-by-step breakdown helped me understand exactly why my deduction was reduced. Saved me hours of research and double-checking calculations. Now I finally understand how these phase-outs actually work in practice!
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Yara Sabbagh
If you're still having trouble resolving this with the IRS, you might want to try https://claimyr.com to get through to an actual IRS agent. I was in a similar situation last year where my calculated student loan interest deduction didn't match what the IRS said I could claim, and I spent WEEKS trying to get through to someone on the phone. Claimyr got me connected to an IRS representative in under 20 minutes when I'd been trying for days on my own. The agent walked me through exactly how they calculate the phase-out and confirmed which tax year rules applied to my situation. You can see how it works in this video: https://youtu.be/_kiP6q8DX5c
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Keisha Johnson
•Wait, this actually works? I thought it was impossible to reach the IRS by phone these days. How much does this service cost? I've been trying to get clarification on education credits vs. deductions for months.
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Paolo Rizzo
•This sounds like a scam to me. How could a third-party service possibly get you through to the IRS faster? The IRS phone system is notoriously understaffed and overwhelmed. I'm extremely doubtful this actually works as advertised.
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Yara Sabbagh
•The service basically navigates the IRS phone tree for you and waits on hold so you don't have to. When an agent finally picks up, you get a call back to connect with them. It's essentially a "hold my place in line" service. As for specific education credits vs. deductions, the IRS agent I spoke with clarified exactly how the student loan interest deduction interacts with education credits. They confirmed that you can claim both the student loan interest deduction and education credits in the same year (like the Lifetime Learning Credit), as long as you're not double-dipping on the same expenses.
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Paolo Rizzo
I have to eat my words about Claimyr. After dismissing it as probably a scam, I was desperate enough to try it when I couldn't resolve a similar student loan interest deduction issue through the IRS website or by mail. I got connected to an IRS agent in about 15 minutes! The agent confirmed that for the 2022 tax year (returns filed in 2023), the phase-out range for married filing jointly was indeed $140,000-$170,000. That's why your calculation was off - you were using different thresholds. The agent also explained that you definitely apply the phase-out percentage to the $2,500 maximum deduction amount first, not to the total interest paid. So for your case, with $150,000 MAGI, you were $10,000 into a $30,000 phase-out range, meaning 33.3% reduction. That's why $1,667 was the correct answer ($2,500 - $833).
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QuantumQuest
Just wanted to point out something that might be confusing people. The student loan interest deduction is an "above-the-line" deduction, meaning you can take it even if you don't itemize deductions. It directly reduces your adjusted gross income. Also, don't forget that the deduction is subject to income limits regardless of how much interest you actually paid. The phase-out is designed to gradually reduce the benefit for higher-income taxpayers until it disappears completely.
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Amina Sy
•Do both spouses need to be on the student loan for the interest to be deductible on a joint return? My wife has student loans from before we were married, and I'm not a co-signer on them.
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QuantumQuest
•No, either spouse can claim the deduction for qualified student loan interest on a joint return, even if only one spouse is legally obligated to pay the loan. This is one of the benefits of filing jointly. The IRS treats married couples filing jointly as one taxpayer unit, so as long as neither of you can be claimed as a dependent on someone else's return, you can deduct the interest paid on qualified student loans regardless of which spouse incurred the debt or which spouse actually made the payments.
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Oliver Fischer
For anyone taking accounting certification exams like the OP, make sure you know which tax year the question is referring to! Tax parameters like phase-out ranges change almost every year due to inflation adjustments. For reference: 2022: $140,000-$170,000 MFJ phase-out 2023: $145,000-$175,000 MFJ phase-out 2024: $155,000-$185,000 MFJ phase-out 2025: $160,000-$190,000 MFJ phase-out (projected
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Natasha Petrova
•Is there a website that lists all these phase-out ranges by year? I always struggle to find the correct numbers when doing tax planning.
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Esmeralda Gómez
•This is exactly why I bombed my first tax prep course! I kept using the wrong year's numbers because I wasn't paying attention to which tax year the problems were referring to. It's especially tricky because you might be preparing a 2023 return in 2024, so you need the 2023 thresholds, not the current year's. Thanks for laying out those phase-out ranges by year - this is super helpful! I'm saving this for reference. Do you happen to know if the IRS announces the next year's inflation adjustments at a consistent time each year?
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Theodore Nelson
The IRS website has a great resource for this! Go to IRS.gov and search for "Student Loan Interest Deduction" - they maintain a table with current and previous year phase-out ranges. You can also find all the inflation-adjusted tax parameters in IRS Revenue Procedure publications, which are released annually. For example, Rev. Proc. 2023-34 has all the 2024 numbers, and Rev. Proc. 2024-40 has the 2025 figures. Pro tip: bookmark the IRS "Tax Benefits for Education" page (Publication 970) as it gets updated each year with all the current thresholds for student loan interest deduction, education credits, and other education-related tax benefits. Much more reliable than random tax websites that might not be updated promptly.
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Andre Moreau
This is a great example of why it's so important to double-check which tax year's rules apply to any given question! I've seen this trip up so many people on exams and in real practice. One thing that might help for future reference: when you're doing phase-out calculations, always remember the formula is applied to the MAXIMUM allowable deduction amount, not the actual amount paid. So for student loan interest, you're always starting with the lesser of $2,500 or actual interest paid, then applying the phase-out reduction to that base amount. The IRS is pretty consistent with this approach across different deductions and credits - they phase out the benefit amount, not the underlying expense. This same logic applies to education credits, retirement contribution deductions, and other income-sensitive tax benefits. Glad you got the job despite the test confusion! Sometimes these exam questions can be poorly worded or use outdated figures, which makes them more about test-taking strategy than actual tax knowledge.
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StarStrider
•This is such a helpful thread! As someone who's completely new to tax calculations, I really appreciate how everyone broke down the phase-out formula step by step. I had no idea you had to apply the phase-out percentage to the maximum deduction amount rather than the total interest paid - that seems like such an easy mistake to make! @Andre Moreau - your point about the IRS being consistent with this approach across different deductions is really valuable. Are there other common deductions where people make similar mistakes with phase-out calculations? I want to make sure I understand this concept correctly before I have to deal with it on my own taxes. The year-by-year phase-out ranges that @Oliver Fischer posted are going straight into my tax reference folder. It s crazy'how much these thresholds change each year!
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