FTE meaning: what full-time equivalent is and how to calculate it

FTE stands for full-time equivalent: a way to count staff by hours instead of heads, so one full-time worker is 1.0 FTE and two half-time workers also add up to 1.0. Under the Affordable Care Act the IRS counts one FTE for every 120 monthly hours worked by part-timers, and 50 or more full-time employees plus FTEs makes you an applicable large employer (IRS, checked October 18, 2026).

FTE (full-time equivalent) is a unit that converts hours worked into a number of full-time workers.

On this page

1.0 FTE in budgets and job posts

In budgets and HR systems such as Workday, a position's FTE is its scheduled hours divided by the standard full-time week. With a 40-hour standard, 1.0 FTE is 2,080 hours a year (40 x 52), 0.5 FTE is 20 hours a week or 1,040 hours, and 0.8 FTE is 32 hours. A job post that says "0.6 FTE" means 24 hours a week. Pay and paid time off are often prorated by the FTE figure.

The ACA calculation, step by step

  1. Count full-time employees each month: anyone averaging 30 hours a week, or 130 hours in the month.
  2. Add the hours of everyone else for the month, counting no more than 120 hours per person, and divide by 120. That is the month's FTE count.
  3. Add full-time employees and FTEs for each month of the prior year, then divide by 12. Drop any fraction.
  4. 50 or more means you are an applicable large employer this year. One exception: if you went over 50 for 120 days or fewer, and only because of seasonal workers, you are not.

Example: 30 full-time staff and 25 part-timers

ACA size test, same staffing every month of the prior year
Part-timer hours a monthMonthly FTEsFull-time plus FTEALE?
80 hours each16.67 (2,000 / 120)46 (46.67 rounded down)No
100 hours each20.83 (2,500 / 120)50 (50.83 rounded down)Yes

Method: IRS, Determining if an employer is an applicable large employer, last reviewed Aug 8, 2026, checked Oct 18, 2026.

Twenty extra part-time hours a person a month moves this business over the line, which brings the employer mandate and annual ACA reporting. Your health plan options are in small business health insurance, ICHRA and QSEHRA. If you use a PEO, ask whether its fee covers ACA reporting; see PEO costs.

FTE vs headcount

Headcount is the number of people on payroll; FTE is the hours they represent. A team of 10 where 4 work half time is 10 heads and 8.0 FTE. Vendors price on headcount: payroll and PEO fees are charged per employee, so 4 half-time workers cost the same as 4 full-time ones. Model the real cost of each hire with the employee cost calculator.

Frequently asked questions

What does FTE mean?
FTE means full-time equivalent. It counts workers by hours, so two people working half time equal 1.0 FTE.
What is 1.0 FTE?
1.0 FTE is one full-time position. With a 40-hour standard week that is 2,080 hours a year; 0.5 FTE is 20 hours a week.
How do I calculate FTE for the ACA?
Add the monthly hours of employees who are not full time, counting no more than 120 per person, and divide by 120. Add that to your full-time count (30+ hours a week) for each month, sum the 12 months and divide by 12. The IRS method is on its applicable large employer page.
What is an FTE employee?
Under the ACA it is not a person but a unit: 120 hours a month of part-time work. For other purposes, an FTE employee usually means a full-time worker, or a position measured against full-time hours.
Is FTE the same as headcount?
No. Headcount counts people; FTE counts hours. 10 people with 4 on half time are 10 heads and 8.0 FTE.
Sources (2)
  1. IRS: Determining if an employer is an applicable large employer (checked Oct 18, 2026)
  2. eCFR: 26 CFR 54.9802-4 (individual coverage HRAs) (checked Oct 16, 2026)

This page is general information, not tax, legal or accounting advice. Rules and rates change, so check the official source linked above before you file or sign a contract. Read our disclaimer.