ACA Full-Time Equivalent (FTE) Calculator

Calculate your FTE count

Enter your employee counts below. This calculator uses the standard IRS formula: employees averaging 30+ hours per week count as full-time; part-time hours are totaled and divided by 120 to get their FTE contribution, with each part-time employee's monthly hours capped at 120 for this calculation.

How this number is used

The ACA employer mandate applies to "Applicable Large Employers" (ALEs) -- businesses with 50 or more full-time equivalent employees on average during the prior calendar year. If your FTE count is 50 or above, you're generally required to offer ACA-compliant health coverage to your full-time employees or potentially face a penalty. Below 50 FTEs, offering coverage is entirely optional under federal law, though some businesses choose to offer it anyway as a hiring and retention tool.

Note that ALE status is based on your prior calendar year's average FTE count, not a snapshot of today -- the IRS looks back at the previous year's employment data to determine whether the mandate applies to you for the current year. If your headcount is fluctuating near the 50-FTE line, it's worth tracking your monthly FTE count throughout the year rather than checking only once.

The mandate itself, when it applies, generally requires offering coverage to at least 95% of full-time employees (and their dependents) that meets both a minimum value standard and an affordability threshold based on employee wages -- for 2026, that affordability threshold sits at 9.96% of household income. Falling short on either coverage offer rate or affordability can trigger a penalty, so businesses near the ALE threshold often find it worth getting ahead of plan design well before the mandate technically kicks in.

Why this threshold matters beyond compliance

Even for businesses well under 50 FTEs, tracking this number is worth doing for reasons beyond avoiding a penalty. Growing businesses in Tennessee that are approaching the threshold -- through hiring, seasonal ramp-up, or an acquisition -- benefit from knowing well in advance rather than discovering ALE status after the fact during a tax filing. Setting up ACA-compliant coverage takes time to shop, compare, and enroll, and starting that process a few months before you cross 50 FTEs is far less stressful than scrambling to comply after the threshold has already been crossed for a full calendar year.

It's also worth noting that FTE count for ACA mandate purposes is calculated separately from headcount thresholds used for other federal and Tennessee state requirements, like FMLA or certain state-level employment laws, which use their own employee-count definitions. Don't assume that clearing or falling under one threshold automatically tells you where you stand on another -- each has its own counting rules.