Welcome to the Roadmap of Individual Taxation!
Hello, future CPA! Today, we are diving into one of the most important parts of the REG exam: moving from your total income down to the number you actually pay taxes on. Think of this process like a filter. You start with a big bucket of "Gross Income," and as you move down the "Tax Form Waterfall," we filter out certain expenses to reach Adjusted Gross Income (AGI) and finally Taxable Income.
Why does this matter? Because AGI is the magic number! It determines your eligibility for many credits and further deductions. If you understand how to get to AGI, you’ve mastered half the battle of individual taxation.
Part 1: Adjustments (The "Above-the-Line" Deductions)
Adjustments are special expenses that you subtract from your Gross Income to arrive at your AGI. These are often called "Above-the-Line" deductions because, on the old tax forms, they literally sat above the line where AGI was calculated. These are great for taxpayers because you can take them even if you don't itemize!
Key Adjustments to Remember:
• Educator Expenses: K-12 teachers can deduct up to \( \$300 \) for unreimbursed classroom supplies. If both spouses are teachers, they can deduct \( \$600 \).
• Health Savings Account (HSA) Contributions: If you have a high-deductible health plan, the money you put into an HSA is deductible.
• Moving Expenses: Don't get tricked! Only active-duty military members moving due to a military order can deduct these now.
• Self-Employment Tax: If you work for yourself, you pay both the employer and employee share of Social Security/Medicare. You get to deduct 50% of that tax to arrive at AGI.
• Self-Employed Health Insurance: 100% of medical insurance premiums for yourself and your family are deductible if you are self-employed.
• Student Loan Interest: You can deduct up to \( \$2,500 \) of interest paid on qualified student loans.
\nNote: This starts to "phase out" (disappear) as you earn more money!
\n• Alimony Payments: Only for divorce decrees finalized before December 31, 2018. For newer divorces, alimony is neither deductible by the payer nor taxable to the receiver.
Memory Aid: The "Self-Employed Trio"
\nIf you see a self-employed taxpayer, remember they get three big adjustments:
\n1. 50% of their SE Tax.
\n2. 100% of their Health Insurance.
\n3. Contributions to Retirement Plans (like a SEP IRA or Simple IRA).
Quick Review: Adjustments reduce your Gross Income to get to AGI. You don't need to choose between these and the standard deduction—you get these automatically if you qualify!
\n\nPart 2: The Fork in the Road—Standard vs. Itemized
\nOnce you reach AGI, you have a choice. You can subtract the Standard Deduction (a flat dollar amount based on your filing status) OR you can Itemize (list out specific expenses). You should always pick whichever one is bigger to pay the least amount of tax.
\n\nThe Standard Deduction
\nThink of this as a "free pass" from the IRS. They give everyone a base amount of income that isn't taxed. The amounts change every year for inflation, but remember that 65+ or Blind taxpayers get an additional amount added to their standard deduction.
\n\nItemized Deductions (Schedule A)
\nIf your personal expenses are higher than the standard amount, you’ll "itemize" them on Schedule A. Here are the big ones for the exam:
\n\n1. Medical Expenses: You can only deduct the part of your medical bills that exceeds 7.5% of your AGI.
\nAnalogy: Imagine a hurdle. If your AGI is \( \$100,000 \), your hurdle is \( \$7,500 \). If you spent \( \$8,000 \) on doctors, you only get to deduct the \( \$500 \) that went over the hurdle.
2. State and Local Taxes (SALT): You can deduct state/local income taxes (or sales taxes) plus real estate and personal property taxes.
\nCommon Mistake: The total deduction for SALT is capped at \( \$10,000 \). Even if you paid \( \$30,000 \) in property taxes, you only get \( \$10,000 \) on Schedule A.
3. Interest Expense:
• Home Mortgage Interest: Deductible on up to \( \$750,000 \) of loan principal used to buy or improve your home.
\n• Investment Interest: Limited to your net investment income.
\n• Personal Interest: (Credit cards, car loans) is NOT deductible.
4. Charitable Contributions:
\n• Cash gifts are generally limited to 60% of AGI.
\n• Property gifts are generally limited to 30% of AGI.
5. Casualty Losses: You can only deduct these if they happened in a Federally Declared Disaster Area. There is also a \( \$100 \) floor per event and a 10% of AGI hurdle.
Key Takeaway:
Itemized deductions are "Below-the-Line." They are only useful if their total sum is greater than your Standard Deduction.
Part 3: Qualified Business Income (QBI) Deduction
This is a newer deduction (Section 199A) for small business owners, partners, and S-corp shareholders.
• The Rule: Generally, you can deduct 20% of your "Qualified Business Income."
• Where it sits: This is a "Below-the-Line" deduction, but it is separate from the Standard/Itemized choice. You get to take this in addition to your Standard or Itemized deduction!
Don't worry if this seems tricky! For the REG exam, focus on the fact that this deduction exists to help non-corporate business owners get a tax break similar to the lower corporate tax rate.
Summary: The Step-by-Step Process
To find Taxable Income, follow these steps:
1. Start with Gross Income (Wages, Interest, Business Income, etc.).
2. Subtract Adjustments (Educator exp, Student loan interest, etc.).
3. Result = Adjusted Gross Income (AGI).
4. Subtract the GREATER of Standard Deduction or Itemized Deductions.
5. Subtract the QBI Deduction (if applicable).
6. Final Result = Taxable Income.
Common Traps to Avoid
• Don't mix up the Lines: If the question asks for AGI, do not subtract the standard deduction or medical expenses. Those come after AGI.
• Real Estate Taxes: Rental property taxes are business expenses (Schedule E), but your personal home property taxes are itemized deductions (Schedule A).
• Self-Employed Health Insurance: This is an Adjustment (above the line), not a medical expense (below the line). This is much better for the taxpayer because it isn't subject to the 7.5% hurdle!
Did you know? The 7.5% floor for medical expenses is one of the hardest hurdles to clear. Most taxpayers don't get to deduct medical expenses because their insurance covers too much or their income is too high!
Final Encouragement: You are doing great! Tax becomes much easier when you visualize the 1040 form. Just keep asking yourself: "Is this above the line (Adjustment) or below the line (Itemized)?" You've got this!