Small Business or Large Group: Does ICHRA’s Math Change With Company Size?

One of the most common questions we hear from employers considering ICHRA is some version of: “Does this even work for a company my size?” Whether that’s five employees or five hundred, the honest answer is yes — but the mechanics differ a bit depending on where you fall.

Under 50 full-time-equivalent employees

If you’re not classified as an Applicable Large Employer (ALE) under the ACA, you’re not legally required to meet a specific affordability threshold with your ICHRA contribution. That gives you more flexibility in setting your budget.

That said, “flexible” doesn’t mean “arbitrary.” If your contribution is too low, employees may not be able to afford meaningful coverage, and you’ll see low participation and low goodwill from a benefit that was supposed to help retention. Most small employers still benchmark their contribution against local individual market premiums, even without a legal requirement to do so — because a benefit nobody can actually use isn’t much of a benefit.

50 or more full-time-equivalent employees (Applicable Large Employers)

If you cross the 50-FTE threshold, the ACA’s employer mandate applies, and your ICHRA contribution needs to meet an affordability test: after your contribution, an employee’s cost for the lowest-cost Silver plan in their area generally can’t exceed 9.96% of their household income (the 2026 threshold — it’s adjusted annually).

Since most employers don’t know every employee’s actual household income, the IRS allows three simplified “safe harbor” methods to check affordability instead:

• W-2 safe harbor — based on Box 1 wages
• Rate of pay safe harbor — based on hourly rate or monthly salary
• Federal poverty line safe harbor — based on the published FPL for a household of one

Any one of these keeps you compliant without needing to ask employees for their full financial picture.

Where company size actually changes the calculation

• Geography matters more than headcount. ICHRA contributions can (and often should) vary by rating area, since a “lowest-cost Silver plan” in one zip code can cost meaningfully more or less than in another. A 20-person company spread across three states has more to think through here than a 20-person company in one office.
• Employee classes scale with complexity. Larger, more varied workforces (full-time/part-time, salaried/hourly, multiple locations) get more value out of ICHRA’s class structure, since you can set different contribution amounts for each group rather than a single number for everyone.
• Administrative overhead is roughly the same either way. Whether you have 8 employees or 800, you’ll want a plan document, a compliant employee notice, and a clear enrollment process — the paperwork doesn’t really get harder with scale, it just needs to be done once and done right.

The short version

Company size changes how you calculate your contribution and how many classes make sense — not whether ICHRA is available to you at all. Whether you’re a five-person shop tired of renewal surprises or a 200-person company trying to hit an ACA compliance target, the underlying structure is the same.

Not sure which safe harbor or class structure fits your business? Book a free consultation and we’ll walk through the numbers together — no obligation, no cost to you.