How to Use This Calculator
- 1
Enter Your Compensation Details
Input your annual base salary, target bonus percentage, performance multiplier, optional bonus cap, state tax rate, and year-to-date earnings.
- 2
Review Results and Scenarios
See your take-home bonus, total tax withheld, and total compensation. The insights card breaks down federal, FICA, and state withholding. Use the chart and sensitivity table to compare outcomes at different performance multipliers.
Example Calculation
An employee with a $75,000 base salary is eligible for a 10% bonus, hits the target 1.0 performance multiplier, has no bonus cap, and uses a 5% state tax rate.
Base Salary
75,000
Target Bonus
10
Performance Multiplier
1.0
Bonus Cap
0
State Tax Rate
5
Year-to-Date Earnings
0
Results
Take-Home Bonus
$4,901.25
Total Tax Withheld
$2,598.75
Total Compensation
$82,500.00
Insights card shows gross bonus of $7,500, federal withholding of $1,650, FICA of $573.
Tips
Moving to a No-Tax State Boosts Take-Home
On a $7,500 bonus, dropping state tax from 5% to 0% increases take-home from $4,901.25 to $5,276.25 — an extra $375. Enter 0% in the state tax field to model Texas, Florida, or other no-income-tax states.
Higher Performance Multipliers Compound Quickly
At 1.5x performance on a $75,000 salary with 10% target, the gross bonus jumps from $7,500 to $11,250 and take-home rises to $7,351.88. Use the sensitivity table to see each multiplier's after-tax impact.
Watch the Social Security Wage Cap
If year-to-date earnings exceed $184,500, Social Security tax drops off the bonus entirely. A $150,000 earner with $185,000 YTD and a $15,000 bonus pays 0% SS instead of $930, dropping the effective rate from 34.6% to 28.4% and boosting take-home by $930.
Bonus Caps Can Cost You Real Money
With a $10,000 cap on a 1.5x multiplier, the gross bonus is capped at $10,000 instead of $11,250 — forfeiting $1,250 in potential payout. Enter your actual cap to see the impact.
Bonus Calculation Formulas
The calculator determines your gross bonus and estimates payroll withholding in four steps:
base bonus = base salary x (target bonus % / 100)
performance-adjusted bonus = base bonus x performance multiplier
gross bonus = min(performance-adjusted bonus, bonus cap) when a cap is set
take-home bonus = gross bonus - federal - Social Security - Medicare - state tax
Federal supplemental withholding is 22%.
Social Security is 6.2% up to the 2026 wage base of $184,500.
Medicare is 1.45%.
State tax uses the rate you enter.
Worked Example: $75,000 Salary at Target Performance
With a $75,000 base salary, 10% target bonus, 1.0x performance multiplier, no cap, and 5% state tax:
- Gross bonus:
$75,000 x 10% = $7,500 - Federal withholding:
$7,500 x 22% = $1,650 - Social Security:
$7,500 x 6.2% = $465 - Medicare:
$7,500 x 1.45% = $108.75 - State tax:
$7,500 x 5% = $375 - Take-home:
$7,500 - $2,598.75 = $4,901.25
The sensitivity table shows how this changes at other performance levels — from $2,450.63 take-home at 0.5x to $9,802.50 at 2.0x.
Performance Factor Sensitivity
| Performance | Gross Bonus | Total Tax | Take-Home | Rate |
|---|---|---|---|---|
| 0.50x | $3,750 | $1,299.38 | $2,450.63 | 34.6% |
| 1.00x | $7,500 | $2,598.75 | $4,901.25 | 34.6% |
| 1.50x | $11,250 | $3,898.13 | $7,351.88 | 34.6% |
| 2.00x | $15,000 | $5,197.50 | $9,802.50 | 34.6% |
Frequently Asked Questions
How is take-home bonus calculated?
The formula is: take-home = gross bonus - federal withholding - Social Security - Medicare - state tax. For a $7,500 gross bonus with 5% state tax, that's $7,500 - $1,650 - $465 - $108.75 - $375 = $4,901.25.
What federal tax rate does this calculator use?
The calculator uses the 22% federal supplemental wage withholding rate. On a $7,500 bonus, federal withholding is $1,650. This is paycheck withholding, not necessarily your final federal income tax rate after filing.
How does the Social Security wage cap affect my bonus?
Social Security tax (6.2%) applies only until combined wages reach the 2026 cap of $184,500. For example, a $150,000 earner with $185,000 YTD pays $0 SS on their bonus, saving $930 on a $15,000 bonus. The calculator automatically adjusts based on your YTD earnings input.
What does the performance multiplier do?
It scales the base bonus. With a $75,000 salary and 10% target, the base bonus is $7,500. A 1.5x multiplier makes it $11,250 (take-home $7,351.88), while 0.5x reduces it to $3,750 (take-home $2,450.63).
How does a bonus cap affect the final payout?
A bonus cap limits the gross bonus regardless of performance. With a 1.5x multiplier producing $11,250, a $10,000 cap reduces the gross to $10,000 and take-home to $6,535. The forfeited $1,250 is shown in the results.
Why is the effective withholding rate the same across performance levels?
When all earnings are below the Social Security cap, each tax component is a flat percentage of the bonus: 22% federal + 6.2% SS + 1.45% Medicare + 5% state = 34.65%, which rounds to 34.6%. The rate only changes when SS caps out or state tax is different.