Effective withholding is this check's FIT divided by this check's gross. Marginal withholding is the last-dollar Pub 15-T band. They are not the same number.
On $100,000 single biweekly (Step 2 off):
- Gross $3,846.15 ($100,000 ÷ 26)
- FIT $579.31
- Effective FIT 15.06%
- Last dollars 22% (single 22% band starts at $57,900 and runs to $113,200)
- FICA $294.23
- Net $2,972.61
- Annual FIT $15,062
The leftover single notes used other salaries: $80,000 is 13.33% / 22%, $120,000 is 16.33% / 24%, $160,000 is 18.25% / 24%, $200,000 is 19.40% / 24%. Married leftover: $180,000 is 13.77% / 22%. HOH leftover: $140,000 is 14.75% / 24%. This page is the leftover between $80,000 and $120,000. Same 22% last-dollar band as $80,000. $120,000 already crossed 24%.
Federal withholding → · Paycheck take-home →
Hub: United States calculators.
$579.31 is Pub 15-T on this stub. Your Form 1040 uses annual income after the standard deduction or itemized deductions, credits, and other income. State tax is out. Estimate, not tax advice.
Direct answer: $100,000 single → 15.06% effective, 22% last dollar
- Period gross = $100,000 ÷ 26 = $3,846.15
- Annualized wage = $100,000
- Tentative annual FIT = $15,062
- This check = $15,062 ÷ 26 = $579.31
- Effective = $579.31 ÷ $3,846.15 = 15.06%
- Marginal band = 22%
effective % = period FIT ÷ period gross
marginal % = last-dollar Pub 15-T rate on the annualized wage
Same $3,846.15, three statuses
| Status | FIT | Effective | Net (after FICA $294.23) |
|---|---|---|---|
| Single | $579.31 | 15.06% | $2,972.61 |
| Head of household | $441.54 | 11.48% | $3,110.38 |
| Married (one income, Step 2 off) | $353.38 | 9.19% | $3,198.54 |
FICA does not care about filing status on this engine: $294.23 on every row. That is why the net gap is just the FIT gap. Single last dollars are still in the 22% band (that slice ends at $113,200). HOH $100,000 is also 22% (HOH 24% starts at $121,250). Married $100,000 is still 12% (married 22% starts at $120,100).
Hourly leftover at a different salary: $20 × 40 leaves $664.88. HOH take-home at $84,000: $2,677.46.
Nearby single salaries
| Annual | Gross / check | FIT | Effective | Last-dollar band |
|---|---|---|---|---|
| $80,000 | $3,076.92 | $410.08 | 13.33% | 22% |
| $100,000 | $3,846.15 | $579.31 | 15.06% | 22% |
| $120,000 | $4,615.38 | $753.77 | 16.33% | 24% |
The $80,000 and $120,000 rows are the leftovers already published. Single 22% ends at $113,200. $100,000 is still 22%. $120,000 is not.
No. 22% is the last-dollar band. This check withholds 15.06%. Annual FIT is $15,062, not 22% of $100,000.
The Pub 15-T HOH table is wider. $100,000 HOH is still in 22%, but more of the year sits in 10% and 12%. Step 2 off assumes this is the only job.
Not in this definition. 15.06% is FIT only. Add FICA and the combined cut on the single check is about 22.7% ($579.31 + $294.23).