14. AGI and Taxable Income Adjustments Flashcards
(45 cards)
What is the difference between Schedules A, C, E, and F on Form 1040?
🅰️ Schedule A = Itemized Deductions
* Medical expenses
* State/local taxes
* Mortgage interest
* Charitable contributions
🅲 Schedule C = Sole Proprietorship (Self-Employed Business Income)
* Side hustles
* Freelance gigs
* Selling goods/services directly
* Subject to self-employment tax
🅴 Schedule E = Rental, Royalty, and Pass-Through Income
* Real estate rentals (including farmland)
* Royalties
* S corps, partnerships, trusts
* Not subject to self-employment tax
🅵 Schedule F = Farming Income & Expenses
* Crop sales
* Livestock
* Agricultural production on owned or rented land
* Subject to self-employment tax
A is for Adjustments, C is for Commerce, E is for Estates & Earnings (passive), F is for Farming
In Year 6, a taxpayer’s home (basis $150,000, FMV loss $175,000) was destroyed by a federally declared disaster. Insurance reimbursed $130,000. AGI = $60,000. What amount can be deducted as a casualty loss? Also, what are the steps for calculating a personal-use casualty loss?
$13,900. Steps:
Use the lower of FMV loss or adjusted basis → $150,000
Subtract insurance reimbursement → $150,000 − $130,000 = $20,000
Subtract $100 per event → $20,000 − $100 = $19,900
Subtract 10% of AGI → $19,900 − $6,000 = $13,900
Formula: Deductible loss = Lesser of FMV loss or basis − insurance − $100 − 10% AGI
What personal taxes can be deducted as an itemized deduction on Schedule A?
Taxpayers may deduct nonbusiness state and local taxes, limited to $10,000 per return ($5,000 MFS).
Deductible taxes include:
✅ State and local real estate taxes (on personally owned property)
✅ State and local personal property taxes (must be based on value, e.g., vehicle ad valorem taxes)
✅ State and local income taxes or sales taxes (but not both—choose one)
✅ Withholding from paycheck counts as paid during the year
❌ Foreign real estate taxes are not deductible (but may qualify for the foreign tax credit)
❌ Fees, penalties, or flat vehicle registrations are not deductible
Key limit:
$10,000 SALT cap applies to the total of these taxes (not per category)
Above the line deductions
Itemized Deductions (schedule A)
✅ Above-the-Line Deductions (Adjustments to Income)
✅ Above-the-Line Deductions (Adjustments to Income)
-
50% of Self-Employment (SE) Tax
Only half of the total SE tax is deductible on Schedule 1. -
Self-Employed Health Insurance
Fully deductibler if the taxpayer is not eligible to participate in an employer-sponsored plan. -
Traditional IRA Contributions
Deductible if income is within allowable limits and the taxpayer (and spouse, if MFJ) are not covered by a retirement plan at work. -
Health Savings Account (HSA) Contributions
Deductible for eligible individuals with high-deductible health plans (HDHPs). Annual limits apply. -
SEP, SIMPLE IRA, or Qualified Plan Contributions (for self-employed)
Contributions made by self-employed individuals to their own retirement plans are deductible. -
Student Loan Interest (up to $2,500)
Deductible even if the taxpayer does not itemize. Phased out at higher income levels. -
Educator Expenses (up to $300 per eligible educator)
Available to K–12 teachers, instructors, counselors, principals, or aides who work 900+ hours/year. -
Penalty on Early Withdrawal of Savings
Typically applies to early withdrawal of CDs or savings accounts—deductible regardless of income level. -
Alimony Paid (Pre-2019 Agreements Only)
Deductible only if the divorce or separation agreement was finalized before January 1, 2019. Otherwise, not deductible. -
Moving Expenses (Active Duty Military Only)
Deductible only for active-duty members of the Armed Forces moving due to a military order. -
Jury Duty Pay Remitted to Employer
If the taxpayer receives jury duty pay but gives it to their employer (who continues paying their salary), the amount remitted is deductible.
Think generally more business, income earning related.Except alimony etc
✅ Below-the-Line Deductions (Itemized Deductions on Schedule A)
✅ Below-the-Line Deductions (Itemized Deductions on Schedule A)
-
Medical and Dental Expenses
Deductible only to the extent they exceed 7.5% of AGI. Includes unreimbursed payments for doctor visits, prescriptions, surgeries, and some insurance premiums. -
State and Local Taxes (SALT)
Includes either state/local income tax or sales tax (choose one), plus real estate and personal property taxes based on value. The total deduction is limited to $10,000 ($5,000 if MFS). -
Mortgage Interest
Interest on acquisition debt (used to buy, build, or substantially improve a home) is deductible on loans up to $750,000 for debt incurred after 12/15/17. Up to $1,000,000 for earlier debt. -
Investment Interest Expense
Deductible up to the amount of net investment income (e.g., interest, dividends). Excess is carried forward. -
Charitable Contributions
Cash donations are deductible up to 60% of AGI. Donations of property are generally deductible at FMV, but limits and substantiation rules apply. -
Casualty and Theft Losses
Only deductible if from a federally declared disaster. Must exceed $100 per event and 10% of AGI. -
Gambling Losses
Deductible only to the extent of gambling winnings. Cannot exceed reported gambling income. -
Other Miscellaneous Deductions (currently suspended)
Deductions subject to the 2% AGI floor—such as unreimbursed employee expenses, tax prep fees, hobby expenses—are suspended through at least 2025 under the TCJA. -
Real Estate Taxes
Deductible based on the number of days the taxpayer owned the home. If sold during the year, only the seller’s share is deductible.
Real Estate Tax × (Days Owned ÷ 365) - Foreign Income Taxes – Deductible unless you claim the foreign tax credit; must be a legal and actual tax liability
- Personal Property Taxes – Must be ad valorem (based on value) and imposed annually to qualify (e.g., car registration fees tied to value, not weight or year)
Think more Lifestyle, personal expenses.
When is a taxpayer required to file a tax return based solely on self-employment income?
A: If net self-employment income is $400 or more, filing is required—even if the taxpayer has no other income or is under the standard deduction.
A taxpayer receives alimony, child support, and property settlement payments from a divorce finalized in 2018. What portion is included in gross income?
Only the alimony is included in gross income.
Alimony is taxable if the divorce was finalized before 2019.
Child support and property settlements are never taxable, regardless of the divorce date.
What state and local income tax amounts are deductible on Schedule A for federal purposes?
- Deduct amounts actually paid in the tax year (e.g., withholdings and prior-year tax deficiencies).
- Do not deduct interest on underpayments.
- Do not reduce the deduction by refunds unless the prior year’s deduction gave a federal tax benefit.
Which type of income is treated as passive under the passive activity loss rules?
A) Dividend income from a portfolio
B) Income from a limited partnership interest
C) Commission from selling vacation property
D) Rental income where the taxpayer materially participates as a real estate professional
B – Income from a limited partnership interest
Under the passive activity loss rules, passive income is defined as income from a trade or business in which the taxpayer does not materially participate.
Limited partnerships are always passive because limited partners cannot materially participate under law.
Rental activities are generally passive too, unless the taxpayer:
Actively participates in the rental activity, or
Is a real estate professional (which turns rental income into non-passive).
Dividends are portfolio income (not passive).
Commissions are active income.
What amount is deductible above-the-line for a self-employed individual with retirement contributions and SE tax?
50% × Self employment Tax + ((25% × Net Self employment Income) ÷ 1.25)
Casualty Loss Deduction (Personal Use Property – Federal Disaster Area)
To deduct a casualty loss on personal-use property, the loss must occur in a federally declared disaster area. The deductible amount is the lesser of the decline in FMV or the asset’s basis, reduced by a $100 floor and 10% of AGI.
Formula:
Deductible Loss = Lesser of (FMV loss, basis) − $100 − (10% × AGI)
Qualified Business Income (QBI) Deduction – Section 199A
Qualified Business Income (QBI) Deduction – Section 199A
QBI deduction equals 20% of qualified business income (QBI), not taxable income. QBI includes ordinary business income from a pass-through entity, excluding items like wages, capital gains, and interest.
If taxable income is below the phaseout threshold ($364,200 MFJ or $182,100 single in 2023), the full 20% applies without W-2 or UBIA limits.
Formula:
QBI Deduction = 20% × QBI
Example:
Taxable income = $300,000 (MFJ, below limit)
QBI = $250,000
Deduction = 20% × $250,000 = $50,000
QBI is a deductable from AGI, but not an itemized deduction
Which adoption-related expenses are deductible as itemized deductions on a joint tax return?
Only qualified medical expenses are deductible — adoption-related legal and agency costs go toward credits, not deductions
Which of the following is currently deductible as a miscellaneous itemized deduction?
Gambling losses to the extent of gambling winnings
Under the Tax Cuts and Jobs Act (TCJA), most miscellaneous itemized deductions subject to the 2% AGI floor are suspended from 2018 through 2025
This includes things like:
* Tax prep fees
* Investment expenses
* Professional journals
* Brokerage custodial fees
✅ But gambling losses (up to the amount of gambling income) remain deductible
Key rule:
Only gambling losses are still allowed — all other 2% miscellaneous deductions are temporarily disallowed under TCJA.
What are the key rules for deducting interest on qualified education loans?
- Up to $2,500 of interest can be deducted above the line (to arrive at AGI)
- Deduction is phased out at higher AGI levels
- Must file jointly if married — no deduction if filing separately
- Loan must pay for qualified higher ed expenses (tuition, fees, room and board)
- Student must be enrolled at least half-time
- Applies to the taxpayer, spouse, or dependent
Key takeaway:
Room and board are included as qualified expenses. The biggest restrictions are: no MFS, AGI phaseout, and half-time enrollment required
What mortgage-related expenses are deductible for a personal residence?
Mortgage interest is deductible on up to two personal residences (your main home and one second home), if the debt is secured and within IRS limits.
Deductible: Mortgage interest (up to $750,000 total acquisition debt for post-2017 loans)
Not deductible: Utilities, homeowner’s insurance, repairs (considered personal living expenses)
Deducted as an itemized deduction on Schedule A
Example:
If a taxpayer has $5,000 in mortgage interest, $1,200 in utilities, and $6,000 in insurance on a second home, only the $5,000 is deductible.
Key takeaway:
Mortgage interest is deductible on your main home and one second home, but only interest — not personal expenses like insurance or utilities.
How do you calculate net earnings from self-employment for SE tax purposes
To calculate net earnings from self-employment, follow these steps:
- Start with gross business income (e.g., receipts from self-employment work)
- Subtract cost of goods sold (COGS) and operating/business expenses
- Ignore any non-business income like bank interest — it’s not subject to SE tax
- Multiply the result by 92.35% — this gives your net earnings from self-employment, which is what the 15.3% SE tax applies to
Formula:
Net SE earnings =** (Gross receipts − COGS − Expenses) × 92.35%**
How much of a rental real estate loss can a taxpayer deduct if they actively participate and have AGI over $100,000?
If the taxpayer actively participates, they may deduct up to $25,000 of rental real estate losses against other income.
But if AGI exceeds $100,000, the $25,000 allowance is reduced by 50% of the excess over $100,000. This benefit is fully phased out at AGI $150,000.
Formula:
Allowable loss = $25,000 − [50% × (AGI − $100,000)]
Example from question:
* AGI = $120,000
* Excess over $100,000 = $20,000
* Reduction = 50% × $20,000 = $10,000
* Allowed loss = $25,000 − $10,000 = $15,000
Key: This rule only applies to active participation, not material participation or passive owners.
What is the latest date a deductible IRA contribution can be made to count for the prior tax year?
The contribution must be made by the original tax return due date (typically April 15), even if the taxpayer files for an extension.
- Filing an extension does not extend the IRA contribution deadline
- Contributions made after the original due date count toward the current tax year
Example:
For tax year 20X2, the IRA contribution must be made by April 15, 20X3, regardless of when the return is actually filed.
Key:
Deadline = Original due date, not the extension.
How do you calculate the deductible amount for charitable contributions when some value is received in return?
You can only deduct the part of a donation that is more than what you received.
Steps:
- Deduct full cash donations to qualified charities
- If you pay for an item at a fundraiser, only deduct the amount paid above fair market value (FMV)
- Deduct donated property (like clothes) at FMV if supported by a receipt
- The total deduction must be within IRS limits (usually 60% of AGI for cash donations)
Example from question:
* Cash to church: $2,500
* Paid $800 for item worth $500 → Deduct $300 (only the amount over FMV)
* Donated clothes to Goodwill: $400
Total deduction = $2,500 + $300 + $400 = $3,200
Correct answer: $3,200
Is alimony, child support, or property settlement taxable under a 2019 divorce decree?
For divorce agreements executed after December 31, 2018:
Alimony received is NOT taxable
Alimony paid is NOT deductible
Child support is never taxable
Property settlements are not taxable
Example:
If a person receives:
* $25,000 in alimony
* $10,000 in child support
* $15,000 in property settlement
→ Total taxable income = $0
Key rule: Post-2018 divorce payments are not included in gross income