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Prorated Bonus Calculator

📅Last updated: December 19, 2025
Reviewed by: LumoCalculator Team

Calculate your prorated bonus based on time worked during the bonus period. Perfect for new hires, employees leaving mid-year, or anyone with partial-year eligibility.

Calculate Prorated Bonus

Bonus Period Dates
Employee Dates

Enter dates employee was eligible during the bonus period

Prorated Bonus Result

💵 Prorated Bonus

$5,041.10
50.41% of full bonus
Full Bonus
$10,000.00
Annual
Amount Forfeited
$4,958.90
181 days missed

📅 Days Breakdown

Total Days in Period365 days
Days Worked/Eligible184 days
Days Not Worked181 days
Proration Percentage50.41%
Bonus Period
Jan 1, 2025 - Dec 31, 2025
Employee Eligible
Jul 1, 2025 - Dec 31, 2025

📊 Daily Breakdown

$27.40
per day

💡 How Proration Works

Prorated Bonus = Full Bonus × (Eligible Days ÷ Total Days in Period)
$5,041.10 = $10,000.00 × (184 ÷ 365)

Bonus Proration Formula

Prorated Bonus = Full Bonus × (Days Worked ÷ Total Days in Period)

Example Calculation

• Annual bonus: $10,000
• Employee start date: July 1
• Days eligible: 184 days (Jul 1 - Dec 31)
• Total days in year: 365 days
Prorated = $10,000 × (184 ÷ 365) = $5,041.10

Common Proration Scenarios

New Hire

Employee started after the bonus period began

Termination

Employee left before the bonus period ended

Leave of Absence

Unpaid leave during bonus period

Part-Year Employment

Both started late and left early

Promotion Mid-Period

Bonus level changed during period

Calendar Days vs. Work Days

📅 Calendar Days

  • • Total: 365 days/year
  • • Includes weekends and holidays
  • • Simpler to calculate
  • • Lower daily rate
  • • More common method
$10,000 ÷ 365 = $27.40/day

💼 Work Days

  • • Total: ~260 days/year
  • • Monday-Friday only
  • • May exclude holidays
  • • Higher daily rate
  • • More favorable for employees
$10,000 ÷ 260 = $38.46/day

💡 Tip: Always check your company's bonus policy document to confirm which method they use. The difference can be significant over several months.

Bonus Period Comparison

PeriodDaysDaily Rate ($10K)Typical Use
Annual365$27.40Year-end bonuses, performance bonuses
Quarterly~91$109.89Sales commissions, MBO bonuses
Monthly~30$333.33Production bonuses, attendance bonuses

Important Considerations

✅ Review Your Policy

  • • Check your offer letter
  • • Read the bonus plan document
  • • Ask HR for clarification
  • • Get terms in writing

⚠️ Watch Out For

  • • "Employed on payout date" clauses
  • • Minimum service requirements
  • • Clawback provisions
  • • Performance conditions

📝 For New Hires

  • • Negotiate guaranteed minimums
  • • Ask for signing bonus offset
  • • Clarify eligibility start date
  • • Understand proration method

🚪 If Leaving

  • • Time your departure strategically
  • • Negotiate bonus in severance
  • • Understand forfeiture rules
  • • Check clawback exposure

Tax Considerations

💰 Bonus Tax Treatment

Bonuses are taxed as supplemental wages. Employers typically withhold at a flat 22% federal rate (37% for amounts over $1 million). State taxes vary.

Example: $5,000 bonus
Federal: $1,100 (22%)
State: ~$250 (varies)
FICA: $383 (7.65%)
Net: ~$3,267
Actual tax may differ
Withholding ≠ actual tax
Reconciled at tax filing
May owe more or get refund
Based on total annual income

Frequently Asked Questions

How is a prorated bonus calculated?
A prorated bonus is calculated by dividing the full bonus amount by the total days in the bonus period, then multiplying by the days actually worked or eligible. Formula: Prorated Bonus = Full Bonus × (Days Worked ÷ Total Days in Period). For example, if your annual bonus is $12,000 and you started July 1st, you worked 184 days out of 365: $12,000 × (184 ÷ 365) = $6,049.32. Some companies use calendar days, others use work days (excluding weekends/holidays). Always check your company's specific policy.
Should proration be based on calendar days or work days?
The choice between calendar days and work days depends on company policy. Calendar days (365/366 per year) is simpler and more common, treating all days equally including weekends and holidays. Work days (typically 260-262 per year) only counts Monday-Friday and may exclude company holidays. Work day proration results in a slightly higher per-day rate. Example: $10,000 annual bonus ÷ 365 calendar days = $27.40/day. $10,000 ÷ 260 work days = $38.46/day. Neither method is "correct" - follow your company's documented policy to ensure consistency.
When are new employees typically eligible for bonuses?
Bonus eligibility for new hires varies by company and bonus type: (1) Immediate eligibility - Rare, usually only for senior hires with negotiated terms. (2) After probation (90 days) - Common; bonus prorated from eligibility date. (3) After 6 months - Middle ground approach. (4) Full year required - Must complete entire bonus period, no proration. (5) Cliff vesting - Must be employed on payout date to receive anything. Always review your offer letter and bonus plan documents. Some companies also have "minimum service" requirements (e.g., must work 60+ days to receive any prorated amount).
What happens to my bonus if I resign or am terminated?
Bonus treatment upon termination depends heavily on your employment agreement and company policy: (1) Voluntary resignation - Many companies forfeit unvested bonuses; some prorate through last day worked. (2) Involuntary termination (layoff) - More likely to receive prorated amount; check separation agreement. (3) Termination for cause - Usually forfeits all unvested bonuses. (4) Timing matters - Resigning right before bonus payout may forfeit the entire amount. (5) "Employed on payout date" clauses - Common requirement; leaving before payout = no bonus even if earned. Review your bonus plan language carefully, especially the "forfeiture" and "eligibility" sections.
How do unpaid leaves affect bonus proration?
Unpaid leave typically reduces bonus eligibility: (1) Short leaves (< 2 weeks) - Often no impact or ignored. (2) Extended unpaid leave - Usually excluded from eligible days. (3) FMLA leave - Treatment varies; some companies count it, others don't. (4) Disability leave - May be treated differently than voluntary leave. (5) Sabbatical - Usually excluded from bonus calculation. Example: Annual bonus $10,000, took 30 days unpaid leave. Days worked: 365 - 30 = 335. Prorated: $10,000 × (335/365) = $9,178. Note: Paid leaves (vacation, sick time) generally don't affect bonus proration. Check your HR policies for specific treatment of different leave types.
Are prorated bonuses calculated differently for quarterly vs annual bonuses?
The formula is the same, but the period differs: Annual bonus: Divided across 365 days, prorated by days worked in the full year. Quarterly bonus: Divided across ~91 days (quarter), prorated by days worked in that quarter. Monthly bonus: Divided across ~30 days, prorated by days in that month. Example: Same $12,000 target, started November 1: Annual proration (Nov 1 - Dec 31): 61/365 = $2,005. Quarterly Q4 proration (Nov 1 - Dec 31): 61/92 = $7,956. For employees joining mid-year, quarterly or monthly bonuses often result in higher payouts than annual proration because missed quarters may not affect current quarter eligibility.
Do signing bonuses get prorated if I leave early?
Signing bonuses typically have clawback provisions rather than proration: (1) Standard clawback - Must repay if you leave within 1-2 years, often prorated by month. (2) Full clawback - Some require 100% repayment if leaving before a set date. (3) Gross-up considerations - May need to repay gross amount despite receiving net after taxes. Example: $20,000 signing bonus with 24-month clawback. Leave after 18 months: Repay $20,000 × (6/24) = $5,000. Tax complication: You received ~$14,000 net but may owe $5,000 gross. Always negotiate clawback terms during offer stage. Some companies have declining schedules (100% in year 1, 50% in year 2, 0% after).
How should I negotiate bonus terms as a new hire starting mid-year?
Strategies for negotiating fair bonus treatment: (1) Request a guaranteed minimum - "First year bonus guaranteed at minimum 75% of target." (2) Ask for signing bonus offset - Request signing bonus equal to prorated amount you'd miss. (3) Negotiate full first-year bonus - Some companies will pay full annual bonus regardless of start date. (4) Clarify proration method - Get in writing whether it's calendar days, work days, or months. (5) Review cliff dates - Ensure bonus doesn't require being employed exactly 12 months. (6) Document everything - Get bonus terms in your offer letter, not just verbal promises. (7) Ask about early bonus eligibility - Some companies waive waiting periods for senior hires. Start this conversation during salary negotiation when you have the most leverage.