Leave Accumulation Calculator - How to Project Your Leave Balance

Managing leave balances is important for both employees and employers.
Whether you are planning a vacation, a sabbatical, or just keeping track, calculating your future leave balance helps in better planning.

Formulas Used

1. Calculate Accrual Period (Months)

First, we find how many months you have worked between the Start Date and End Date.

$\text{Accrual Period (Months)}=\frac{\text{Difference in Days}}{30.44}$

2. Calculate Total Accrued Leave

Multiply the number of months by your leave accrual rate.

$\text{Total Accrued Leave}=\text{Accrual Rate (Days/Month)}\times \text{Accrual Period (Months)}$

3. Calculate Final Leave Balance

Subtract any leave already taken from the total accrued leave to get your final balance.

$\text{Final Leave Balance}=\text{Total Accrued Leave}-\text{Leave Taken}$

Example Calculation

Let's go through an example:

• Start Date: January 1, 2024
• End Date: April 28, 2025
• Accrual Rate: 1.67 days/month
• Leave Taken: 10 days

Step 1: Find Accrual Period

From January 1, 2024 to April 28, 2025:

• Total Days ≈ 483 days
• Accrual Period (Months):

$\text{Accrual Period}=\frac{483}{30.44}\approx 15.87\text{}\text{months}$

Step 2: Calculate Total Accrued Leave

$\text{Total Accrued Leave}=1.67\times 15.87\approx 26.5\text{}\text{days}$

Step 3: Calculate Final Leave Balance

$\text{Final Leave Balance}=26.5-10=16.5\text{}\text{days}$

Final Thoughts

This calculator gives you a quick, accurate, and simple projection of your future leave balance.
It is perfect for personal planning, HR teams, or project managers who need to estimate leave availability in advance.