What is plan start month for Form 1095-C?

Plan start month is the month in which the employer's health insurance plan year begins.

On the form, it's shown as a two-digit number representing the month (example: 01 for January, 02 for February, and so on). Entering "00" indicates that there was no month in which the employee was offered coverage.

Even if the employee enrolled later, this field only reflects the employer’s plan start or renewal month, not the employee’s individual enrollment date.

The BoomTax template accepts this field in any of the following formats. Use whichever works best for you:

• Two-digit month number: 01, 02, 03, …, 12
• Month number without a leading zero: 1, 2, 3, …, 12
• Full month name: January, February, March, etc.
• Abbreviated month name: Jan, Feb, Mar, etc.