Various Adjustments of Tax Numbers for 2025

Filing statuses: S=single, HH=head of household, MFS=married filing separately, MFJ=married filing joint, QW=qualifying widow(er);
(MAGI mean modified adjusted gross income for that deduction)

The Tax Cut and Jobs Act (TCJA) is in effect 2018 through 2025, unless modified or extended in the future. Changes to various tax deductions are indicated below.
Maximum Salary Deferrals: $23,500 for 401(k), 403(b), 501(c), 457 plans; / $16,500 for SIMPLE
'catch-up'contribution limits for age 50+*: additional $7,500 / $3,500 for SIMPLE
*'super-catch up' amount for ages 60-63: additional $11,250  / $5,250 for SIMPLE
$3,300 for Health FSA
$325/monthly transit benefits
Self-Employed: SEP-IRA: $70,000, with limitation of 20% adjusted net s/e income
Traditional IRA Contributions Limit: $7,000 (up to amount of earned income for the year)
  additional catch-up $1,000 for age 50+

Traditional IRA Deduction MAGI Phaseout:
(when also eligible to contribute
to a retirement plan at work)
MFJ, QW:  $126,000-$146,000
S, HH:  $79,000-$89,000
MFS:  0-$10,000 (living apart all year, see S)
MFJ taxpayer when only other spouse covered by a plan: $236,000-$246,000

Roth IRA Contributions MAGI Phaseout:
MFJ, QW:  $236,000-$246,000
S, HH:  $150,000-$165,000
MFS:  0-$10,000 (living apart all year, see S)

Retirement Savings Credit ('Saver's Credit')
Maximum AGI Limit:
MFJ:  $79,000
HH:  $59,250
S, QW, MFS:  $39,500
Social Security: Before retirement age, can earn up to $23,400 without repaying benefits.
  Benefits reduced $1 for each $2 earned over limit
Preceding months in year of reaching retirement age: $62,160.
  Benefits reduced $1 for each $3 earned over limit
On/after retirement month, no earning limit.
Maximum monthly benefits for 2025: $4,108

Earnings subject to SS tax:
  Employee: $176,100 (maximum $10,918.20 w/h)
  Household help: cash wages over $2,700
Health Savings Account: Maximum HSA contribution $4,300 individual coverage / $8,550 family coverage.
  additional catch-up $1,000 for age 55+
Child Tax Credit: $2,00 per child under age 17, with up to $1700 potentially refundable.
  with phaseout starting at AGI of 400K MFJ, 200K others.
$500 credit for other dependents.
(TCJA and American Rescue Plan)
Child and Dependent Care Expenses/Credit: Allowed expenses for credit of 3K one child / 6K two or more.
  Dependent care benefits set-aside 5K
  Maximum credit $600 (one child) / $1200 (two or more children)
Educational Credit:  (MFS ineligible) American Opportunity Credit (aka Hope Credit):
  100% of first $2,000, 25% of next $2,000 tuition (all 4 years college)
   MAGI phaseout: $80,000-$90,000 (individual); $160,000-$180,000 (MFJ)
Lifetime Learning Credit: 20% of up to $10,000 tuition (any year college+)
   MAGI phaseout: $80,000-$90,000 (individual); $160,000-$180,000 (MFJ)
Student Loan Interest:  (MFS ineligible) Up to $2,500
MAGI phaseout: $80,000-$95,000 (individual); $165,000-$195,000 (MFJ)

Earned Income Credit:  (MFS ineligible)
Maximum Earned income/MAGI limit:
$19,104 (no children), $50,434 (one child), $56,310 (two children), $61,555 (three children)
limits increased for MFJ by $7,110 (no children) else $7,120
Maximum credit will range from $649 for no children up to $8,046 for three or more children.
(disqualified if investment income over $11,950, any filing status)
Adoption Credit: Up to $17,280 nonrefundable credit (MAGI phaseout $259,190-$299,190)
'Kiddie Tax' Child under 18/full-time student under 24, with interest/dividends over $2,700
That portion in excess of $2,700 is taxed at the parents' marginal (top) rate.
Standard Mileage Rates:   Business:  70¢  (Depreciation adjustment: 33¢)
  Charity:  14¢
  Medical:  21¢
Itemized Deduction phaseout: This has been eliminated. And with no personal exemptions, that phaseout also eliminated. (TCJA).
Section 179 Expense:
may change w/new tax law
total limit for tangible personal property placed in service: $1,250,000
phaseout starts at $3.13M placed in service
Depreciation Limit (with/without bonus depreciation): Passenger auto limit, first year business: $31,300 / TBD (likely $22,300)
Capital Gain Tax: Long-term (holding over a year):

0% for taxable income up to $48,350K (S,MFS), $64,750K (HH), $96,700K (MFJ, QW)
15% for next range of taxable income to $533,400 (S), $566,700 (HH), $600,050 (MFJ, QW) or $300,000 (MFS)
20% for taxable income over those amounts.
Gift Tax Exclusion/ Estate Exclusion: $19,000 / $13.990M
Foreign Income Exclusion: $130,000