Collaborative practice applying Gross and net pay calculations including all standard withholdings with scaffolded support
Fill in the Paystub Deductions with Support
Use the IRS tables you just studied to calculate each deduction. This component gives you scaffolds: hints, highlighting, and instant feedback. Phase 4 removes the training wheels.
| Rate | Taxable income range | IRS formula |
|---|---|---|
| 10% | $0 – $11,925 | 10% of taxable income |
| 12% | $11,925 – $48,475 | $1,192.50 + 12% of the amount over $11,925 |
| 22% | $48,475 – $103,350 | $5,578.50 + 22% of the amount over $48,475 |
| 24% | $103,350 – $197,300 | $17,651 + 24% of the amount over $103,350 |
| 32% | $197,300 – $250,525 | $40,199 + 32% of the amount over $197,300 |
| 35% | $250,525 – $626,350 | $57,231 + 35% of the amount over $250,525 |
| 37% | $626,350 – and up | $188,769.75 + 37% of the amount over $626,350 |
Use for both Alex scenarios.
| Rate | Taxable income range | IRS formula |
|---|---|---|
| 10% | $0 – $17,000 | 10% of taxable income |
| 12% | $17,000 – $64,850 | $1,700 + 12% of the amount over $17,000 |
| 22% | $64,850 – $103,350 | $7,442 + 22% of the amount over $64,850 |
| 24% | $103,350 – $197,300 | $15,912 + 24% of the amount over $103,350 |
| 32% | $197,300 – $250,500 | $38,460 + 32% of the amount over $197,300 |
| 35% | $250,500 – $626,350 | $55,484 + 35% of the amount over $250,500 |
| 37% | $626,350 – and up | $187,031.50 + 37% of the amount over $626,350 |
Maria's annualized wages fall in the 12% band here.
| Rate | Taxable income range | IRS formula |
|---|---|---|
| 10% | $0 – $23,850 | 10% of taxable income |
| 12% | $23,850 – $96,950 | $2,385 + 12% of the amount over $23,850 |
| 22% | $96,950 – $206,700 | $11,157 + 22% of the amount over $96,950 |
| 24% | $206,700 – $394,600 | $35,302 + 24% of the amount over $206,700 |
| 32% | $394,600 – $501,050 | $80,398 + 32% of the amount over $394,600 |
| 35% | $501,050 – $751,600 | $114,462 + 35% of the amount over $501,050 |
| 37% | $751,600 – and up | $202,154.50 + 37% of the amount over $751,600 |
Jordan's salary lives in the 12% married bracket.
- Copy the taxable wages shown on the card.
- Multiply by 6.2% and 1.45% for Social Security and Medicare.
- Annualize the wages (multiply by 26) to find the correct federal bracket.
- Apply the row's formula, then divide back to the pay period.
- Use the stated state rate until we load official tables.
Sarah can't hold payroll until a consultant hands her formulas. She needs to know the math herself so she can audit the spreadsheet, train future bookkeepers, and explain every line to Alex. Your calculator should reflect the same logic you are practicing right now.
Sarah sits beside Jordan, her payroll coordinator, and walks through one bi-weekly check with taxable wages of $2,240. Everything you see below mirrors the calculator you are about to use, so study the method as much as the answers.
Social Security – 6.2%
Wage base check: $2,240 is far below the $172,800 annual cap, so the entire check is taxable. Multiply the taxable wages by 0.062 → 2,240 × 0.062 = 138.88. Sarah rounds to the nearest cent, so the deduction on the stub is $138.88.
Medicare – 1.45%
No cap exists for Medicare on this paycheck. Multiply the same taxable wages by 0.0145 →2,240 × 0.0145 = 32.48. The deduction prints as $32.48.
Federal income tax – single filing
- Annualize:
2,240 × 26 = 58,240. - Spot the bracket: $58,240 is in the single 22% band so use the formula
$5,578.50 + 22% of (income − $48,475). - Plug in: income above the cutoff is
58,240 − 48,475 = 9,765. Multiply by 0.22 to get2,148.30, then add the base5,578.50for7,726.80annual tax. - Return to the pay period:
7,726.80 ÷ 26 = 297.19. Rounded deduction is $297.19.
State income tax – 3.5% placeholder
TechStart withholds a flat 3.5% until the state table is finalized. Multiply the wages by 0.035 →2,240 × 0.035 = 78.40, so the deduction equals $78.40.
Jordan's paystub summary
| Line | Amount |
|---|---|
| Taxable wages | $2,240.00 |
| Social Security (6.2%) | $138.88 |
| Medicare (1.45%) | $32.48 |
| Federal income tax | $297.19 |
| State income tax (3.5%) | $78.40 |
| Net pay to Jordan | $1,693.05 |
Double-check: add every deduction ($546.95) and subtract from wages to reach the same net total. When your numbers balance like this, you know the paystub is defensible.
No overtime this period. Health premiums and 401(k) deferrals already came out, so taxable wages are $2,140.
Scaffolded hints
- Social Security = 6.2% of wages (up to $172,800 per year).
- Medicare = 1.45% of wages (no cap for Alex).
- Annualize $2,140 × 26 = $55,640. Still inside the 12% bracket, so apply the single formula: $1,192.50 + 12% over $11,925, then divide back to the pay period.
- State withholding uses a simplified 4% flat rate.
Alex sprinted to hit a deadline and logged 95 hours. After overtime and pre-tax benefits, taxable wages are $2,660.
Scaffolded hints
- Social Security = 6.2% of wages (up to $172,800 per year).
- Medicare = 1.45% of wages (no cap for Alex).
- Annualized wages jump above $69k, so part of this check is taxed at 22%. Use $5,578.50 + 22% of the amount over $48,475, then convert back to this pay period.
- State withholding uses a simplified 4% flat rate.
Maria runs the weekend café and claims head-of-household status for her two children. Taxable wages this period: $2,480.
Maria works in Arizona so Sarah withholds a flat 3% until the AZ worksheet is complete.
Scaffolded hints
- Social Security = 6.2% of wages (up to $172,800 per year).
- Medicare = 1.45% of wages (no cap for Alex).
- HOH brackets go 10% up to $17,000, then 12% up to $64,850. Annualized wages ≈ $64,480, still inside the 12% band.
- State withholding uses a simplified 3% flat rate.