§ IV
Chapter IV
Filed under: reference table, federal income tax, FICA, state tax overlay.
Effective Rate by Income Level: A Reference Table
Single filer, 2026, standard deduction. The combined column adds Social Security and Medicare. State income tax is overlaid in the second table.
§ 1
The shape of the curve
Steep climb from $20K to $70K. Gradual climb from $70K to $200K. Slow grade above.
The effective federal income tax rate rises steeply between $20,000 and $70,000 (from 2.7 percent to 10.6), then more gradually from $70,000 through $200,000, and slowly above. This shape comes from two compounding effects: the standard deduction is proportionally large at low incomes and small at high incomes, and the bracket steps grow taller as income rises. FICA is flat at 7.65 percent up to the Social Security wage base, then drops sharply because the Social Security portion stops collecting.
§ 2Single Filer Reference Table
| Gross | Taxable | Fed tax | Effective fed | FICA | Combined |
|---|---|---|---|---|---|
| $20,000 | $5,400 | $540 | 2.7% | $1,530 | 10.4% |
| $30,000 | $15,400 | $1,610 | 5.4% | $2,295 | 13.0% |
| $40,000 | $25,400 | $2,810 | 7.0% | $3,060 | 14.7% |
| $50,000 | $35,400 | $4,010 | 8.0% | $3,825 | 15.7% |
| $60,000 | $45,400 | $5,210 | 8.7% | $4,590 | 16.3% |
| $70,000 | $55,400 | $7,410 | 10.6% | $5,355 | 18.2% |
| $80,000 | $65,400 | $9,610 | 12.0% | $6,120 | 19.7% |
| $90,000 | $75,400 | $11,810 | 13.1% | $6,885 | 20.8% |
| $100,000 | $85,400 | $13,702 | 13.7% | $7,650 | 21.4% |
| $125,000 | $110,400 | $19,202 | 15.4% | $9,563 | 23.0% |
| $150,000 | $135,400 | $25,202 | 16.8% | $11,475 | 24.5% |
| $175,000 | $160,400 | $31,202 | 17.8% | $13,388 | 25.5% |
| $200,000 | $185,400 | $40,370 | 20.2% | $14,803 | 27.6% |
| $250,000 | $235,400 | $52,938 | 21.2% | $15,753 | 27.5% |
| $300,000 | $285,400 | $70,688 | 23.6% | $16,653 | 29.1% |
| $400,000 | $385,400 | $100,688 | 25.2% | $18,453 | 29.8% |
| $500,000 | $485,400 | $137,870 | 27.6% | $19,903 | 31.6% |
2026 standard deduction $14,600 single (legacy 2025 figure shown for current-year continuity; 2026 projected $15,300). FICA = SS 6.2% (cap $168,600) + Medicare 1.45% + Additional Medicare 0.9% above $200,000. No state tax.
§ 3Filing Status Comparison
Married filing jointly roughly doubles the standard deduction and most of the bracket widths. A couple earning a combined $150,000 has an effective federal rate near 11.6 percent, while a single filer at $150,000 sits at 16.8. The five-point gap is the structural advantage of marriage in the tax code at this income, primarily from the wider 10 percent and 12 percent brackets.
Head of household sits between the two. The standard deduction is $21,900 in 2025 ($22,950 projected 2026), and bracket widths are about 1.4 times the single filer's. A head of household earner at $75,000 has an effective federal rate of roughly 9.4 percent, compared to 11.1 for a single filer at the same income.
The marriage penalty exists but is narrow. It applies to couples where both spouses earn similar high incomes, because the upper brackets for joint filers are not exactly double the single brackets. Two earners at $300,000 each pay slightly more married-filing-jointly than they would as two separate single filers. For most couples, one earner, or asymmetric earners, joint filing is strictly better.
§ 4State Tax Overlay
| Income | Fed + FICA | + California | + New York | + Illinois | + Texas |
|---|---|---|---|---|---|
| $50,000 | 15.7% | 19.8% | 20.2% | 20.6% | 15.7% |
| $75,000 | 18.8% | 23.0% | 23.8% | 23.7% | 18.8% |
| $100,000 | 21.4% | 26.2% | 27.0% | 26.3% | 21.4% |
| $200,000 | 27.6% | 34.0% | 33.8% | 32.6% | 27.6% |
State income tax adds zero (Texas, Florida, Tennessee, Washington, and a handful of others) to eight or more percentage points (California, New York, Oregon, Hawaii). At $200,000, the California-versus-Texas gap is 6.4 points, roughly $12,800 per year. Across a thirty-year career that compounds into hundreds of thousands of dollars, before considering housing costs, state-level deductions, and local sales tax differences.