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Calculate First of Month Following Date of Hire

Reviewed by Calculator Editorial Team

This calculator helps determine the first day of the month immediately following an employee's hire date. This is useful for HR professionals, payroll departments, and business owners who need to align payroll cycles, benefits enrollment, or other monthly processes with the employee's hire date.

How to Use This Calculator

To calculate the first of the month following an employee's hire date:

  1. Enter the employee's hire date in the "Date of Hire" field.
  2. Click the "Calculate" button.
  3. The calculator will display the first day of the month immediately following the hire date.

The result will show the date in the format YYYY-MM-DD. For example, if an employee is hired on June 15, 2023, the first of the month following would be July 1, 2023.

Formula Used

The calculation follows these steps:

  1. Take the hire date and add one month to it.
  2. Set the day of the month to 1.
  3. Return the resulting date.

Formula: First of month following hire date = (Hire Date + 1 month).setDate(1)

This formula ensures you get the first calendar day of the month immediately after the hire date, regardless of the original day of the month.

Worked Examples

Example 1: Employee Hired on January 15

If an employee is hired on January 15, 2023:

  1. Add one month to January 15, 2023 → February 15, 2023
  2. Set the day to 1 → February 1, 2023
  3. Result: February 1, 2023

Example 2: Employee Hired on December 31

If an employee is hired on December 31, 2023:

  1. Add one month to December 31, 2023 → January 31, 2024
  2. Set the day to 1 → January 1, 2024
  3. Result: January 1, 2024

Example 3: Employee Hired on February 28 (Non-Leap Year)

If an employee is hired on February 28, 2023 (a non-leap year):

  1. Add one month to February 28, 2023 → March 28, 2023
  2. Set the day to 1 → March 1, 2023
  3. Result: March 1, 2023

Frequently Asked Questions

Why is this calculation important for HR and payroll?

This calculation helps align payroll cycles, benefits enrollment, and other monthly processes with the employee's hire date. It ensures that monthly processes start at the correct time relative to when the employee joined the company.

Does this calculator handle leap years correctly?

Yes, the calculator automatically accounts for leap years when determining the first day of the following month. For example, if an employee is hired on February 28 in a leap year, the following month would be March 1.

Can I use this calculator for historical dates?

Yes, you can enter any valid date in the past or future to determine the first of the month following that date.

Is there a difference between this and simply adding one month?

Yes. Adding one month to a date like January 31 would result in March 3 (or March 2 in February), while this calculator always returns the first day of the following month, ensuring consistency in monthly processes.