Free prorated salary calculator. Calculate partial-period pay for new hires, departures, or mid-month start dates using calendar, business, or fixed-30 methods.
The Prorated Salary Calculator determines exactly how much you earn for a partial work period — whether you're a new hire starting mid-month, leaving a job before month's end, or taking unpaid leave. Enter your annual salary, the start and end dates, and choose a proration method to see your partial pay broken down by month.
Salary proration is a common HR and payroll calculation, but different companies use different methods. Calendar-day proration divides salary by actual days in the month, business-day proration counts only weekdays, and fixed-30 proration uses a standardized 30-day month. The method used can result in meaningful pay differences — this calculator shows all three side by side so you can verify your paycheck or negotiate your start-date compensation.
The month-by-month breakdown table provides full transparency into how partial periods affect each paycheck, making it easy to plan financially when transitioning between jobs or verifying HR calculations.
Prorated salary calculations vary between employers and can significantly impact your first and last paychecks. This calculator shows exact amounts under each method, helping new hires plan finances and HR departments verify payroll accuracy. Keep these notes focused on your operational context. Tie the context to the calculator’s intended domain. Use this clarification to avoid ambiguous interpretation.
Daily Rate (Calendar) = Annual Salary ÷ 365 Daily Rate (Business) = Annual Salary ÷ 260 Daily Rate (Fixed 30) = Annual Salary ÷ 360 Prorated Pay = Daily Rate × Days Worked Proration Ratio = Prorated Pay ÷ Full-Period Pay
Result: Prorated pay: $7,671
For June 15-30 (16 days) + July 1-31 (31 days) = 47 days. Daily rate: $164.38. Prorated pay: $7,671. This is 93.8% of the full 2-month pay of $10,000.
The method used for proration can cause noticeable pay differences. For a $60,000 salary with a mid-month start: Calendar days yield $164.38/day (÷ 365), business days yield $230.77/day (÷ 260), and fixed 30-day months yield $166.67/day (÷ 360). Over 10 working days, that's a $650 difference between calendar and business-day methods.
Payroll systems often "annualize" your prorated check for tax purposes. A $2,500 half-month check may be taxed as if you earn $5,000/month ($60K/year), resulting in proportionally correct withholding. However, if you start late in the year, your total annual income may be much lower, potentially qualifying for a tax refund.
When starting a new job, your first check covers only days worked. If paid semi-monthly (1st and 15th), starting on the 15th means your first check arrives on the 1st covering ~2 weeks. When leaving, your final check should include prorated salary through your last day, plus any accrued PTO payout where required by state law.
Most employers use calendar-day proration: (Annual Salary ÷ 365) × days worked. Some use business-day proration (÷ 260 working days) or fixed 30-day months (÷ 360). The method used affects your pay — our calculator shows all three for comparison.
Yes, if you start mid-pay-period. Your first check will reflect only the days worked. For example, starting on the 15th of a 30-day month means you'll receive half a month's pay on that pay cycle.
Proration applies to gross salary. Taxes, deductions, and benefits are then calculated on the prorated gross amount. Your net pay will be proportionally lower in partial periods.
Starting at the beginning of a pay period gives you a full paycheck sooner. Starting mid-period means a partial first check. If negotiating, align your start with the company's pay cycle.
Benefits proration varies by employer. Health insurance often starts first of the month following hire, while PTO may accrue from day one on a prorated basis. Check your offer letter's benefits start date.
Yes. Both exempt and non-exempt employees receive prorated pay for partial periods. The difference is that exempt employees don't receive overtime; their base salary is simply prorated by days worked.