Group Health Insurance: A Buyer’s Map for Employers

Where Your Business Fits: Size Thresholds That Decide Everything

Before you compare a single plan or call a single broker, you need one number: your full-time-equivalent (FTE) employee count. That number, not your headcount on paper, decides which rules apply and which doors are open.

Here’s how the IRS wants you to calculate it. Count every full-time employee (anyone averaging 30+ hours a week) as one. Then add up the monthly hours of everyone part-time, divide by 120, and add that to your full-time total. Two people working 15 hours a week count as roughly one FTE.

Two thresholds matter most:

• Under 50 FTEs: You’re a small group. You are not subject to the ACA employer mandate, meaning you’re not legally required to offer coverage at all. You qualify for small-group plans (and possibly SHOP, covered later).
• 50+ FTEs: You’re an Applicable Large Employer (ALE). The ACA employer mandate kicks in — you must offer affordable, minimum-value coverage to full-timers or face per-employee penalties. You’ll buy in the large-group market.

The 100-employee line is the sneaky one. A handful of states (California and New York among them) define “small group” as up to 100 employees, not 50 — which widens your small-group options even after the mandate applies. State rules override the federal default here.

Figure out your FTE number first. Everything in the next section — enrollment path, carriers, obligations — branches from it.

Your Enrollment Paths: SHOP, Small-Group, and Large-Group Explained

If you went to HealthCare.gov looking to buy a small-business plan and hit a dead end, you’re not losing your mind — the federal SHOP enrollment portal was shut down years ago, and as of 2026 you no longer buy SHOP coverage through the government website at all. Here’s where each door actually leads.

SHOP and the Small-Group Market

SHOP (the Small Business Health Options Program) is the regulatory framework for employers with generally fewer than 50 full-time-equivalent employees. The qualifying tax credit still technically requires a SHOP-certified plan in some states, but the actual enrollment now happens directly through a carrier or a licensed broker. The broader small-group market works the same way: you buy straight from a carrier like Blue Cross Blue Shield, Aetna, or UnitedHealthcare, or through a broker. Pricing here is community-rated — premiums are based on your area and the ages of your group, not on how sick anyone is.

The Large-Group Market

At 50+ employees (or 100+ in a handful of states), you move into large-group territory, where carriers negotiate custom plans and pricing based on your specific group.

Which Door Do I Walk Through?

• Under 50 FTEs: Small-group/SHOP — carrier or broker.
• 50+ (or 100+): Large-group — broker-led, custom-negotiated.

A licensed broker is worth using: their commission is typically baked into the premium you’d pay anyway, so they cost you nothing extra.

Insured vs. Self-Funded: How Plan Funding Affects Your Risk

Funding raises the question that quietly determines how much financial risk lands on your business: who actually pays the medical bills when your employees get sick? There are two main models.

With a fully insured plan, you pay the carrier a fixed monthly premium per employee, and they take on all the claims risk. If someone on your team has a $200,000 hospital stay, that’s the carrier’s problem, not yours. Your cost is predictable — you know exactly what you owe each month. This is the default for most small employers, and according to the BLS, employer-sponsored coverage remains the most common source of health insurance for US workers.

With a self-funded (or level-funded, a popular middle-ground version) plan, you pay employees’ claims directly out of company funds, usually with stop-loss insurance that caps your exposure on any catastrophic claim. The upside: if your group stays healthy, you keep the savings instead of handing it to a carrier. The downside: costs swing month to month.

The trade-off in plain English is predictability versus potential savings. Most small businesses start fully insured because the budgeting is simple. Level-funded becomes worth a serious look once you have a younger, healthier workforce or roughly 25+ employees to spread risk across.

One more wrinkle: funding type also changes which compliance rules apply — self-funded plans pull you deeper into ERISA territory, which we’ll unpack next.

Compliance Basics: ERISA and the Employer Mandate in Plain English

The word “compliance” makes most small-business owners brace for a hidden trap — but the rules governing employer health plans are more predictable than they look, and most of the heavy lifting isn’t even yours to do.

Start with ERISA, the federal law covering nearly every private employer that offers health benefits, no matter how small. It asks for three main things: a Summary Plan Description (SPD) given to employees explaining what the plan covers, a fiduciary duty to run the plan in employees’ best interest, and annual reporting via Form 5500 — though plans with fewer than 100 participants are often exempt from that filing.

The bigger trigger is the ACA employer mandate, which kicks in once you average 50 or more full-time-equivalent employees. At that size you must offer coverage that is both affordable (the employee’s share of self-only premium stays under roughly 9% of their household income — the IRS adjusts the exact percentage yearly) and minimum value (it pays at least 60% of typical medical costs). Miss this, and penalties run into the thousands per employee annually.

The most common misconception? That small employers have zero obligations. You still owe SPDs and fiduciary care — you escape only the mandate below 50.

The reassuring part: your broker or third-party administrator (TPA) handles most filings and document templates as a standard part of their service. Loop in an ERISA attorney or benefits compliance specialist only when you self-fund, near the 50-employee line, or face an audit notice.

How to Compare Carriers Like BCBS, UnitedHealthcare, and Aetna

The carrier with the lowest premium can easily cost you the most — that’s the trap, and it’s why you compare on four axes, not one.

Line up every quote against these:

• Network breadth: How many doctors and hospitals are in-network, and where.
• Premium cost: The monthly per-employee price you and your staff split.
• Out-of-pocket structure: The deductible, copays, and the out-of-pocket maximum that caps what anyone pays in a bad year.
• Plan tiers: The lineup of options within each carrier.

Before you commit to anyone, check whether your employees’ actual doctors and hospitals are in-network. Every carrier has a “find a provider” directory online — use it. A cheap plan that excludes the big regional hospital system is a plan your team will resent.

On the national carriers: Blue Cross Blue Shield tends to have the deepest reach because it operates through local affiliates in nearly every state. UnitedHealthcare is the largest by membership and strong on digital tools. Aetna (now part of CVS Health) leans into integrated pharmacy and clinic access. None is universally “best” — strength is regional, so a carrier dominant in one metro can be thin two states over.

In small-group, the metal tiers — Bronze, Silver, Gold, Platinum — standardize this for you. They’re defined by how the plan splits costs (roughly 60/70/80/90% paid by the plan), so a Silver from one carrier is comparable to a Silver from another. Compare tier-to-tier, then weigh total expected cost and network fit over the sticker premium.

Red Flags to Avoid When Choosing a Plan

The cheapest plan on paper can quietly become the most expensive one your employees ever use. A rock-bottom premium usually buys a sky-high deductible and a skinny provider network — meaning your team pays $5,000–$7,000 out of pocket before coverage really kicks in, and only at a short list of in-network doctors. Run the math on total cost, not the monthly sticker.

Watch for these traps before you sign:

• “Group” plans that aren’t real insurance. Some association health plans and health-sharing ministries are marketed to look like group coverage but skip ACA protections entirely. The FTC has flagged deceptive health-coverage marketing repeatedly — if a product won’t confirm it’s a state-licensed, ACA-compliant medical plan in writing, walk away.
• Networks that don’t cover your people. Before committing, look up your key hires’ current doctors and any out-of-state or rural employees in the carrier’s directory. A great Aetna or UnitedHealthcare network in one metro can be threadbare three states over.
• Fine print on participation and contributions. Most small-group carriers require 70%+ employee participation and a minimum employer contribution (often 50% of the employee premium). Miss those and your “approved” plan can get voided at renewal.
• One-carrier brokers. If your broker only quotes one company or won’t disclose how they’re paid, get a second opinion. Their commission shouldn’t be a mystery.

Steps to Set Up or Renew Coverage Without Overpaying

The difference between a smart purchase and an expensive mistake usually comes down to doing five things in the right order. Skip the prep work, and you’ll either overpay or scramble at renewal.

1. Confirm your FTE count and market. Count full-time-equivalent employees to figure out whether you’re shopping the small-group market (generally under 50 FTEs) or large-group (50+). This single number determines your enrollment path, your rating rules, and whether the ACA’s employer mandate applies.
2. Gather your census data. Carriers can’t quote you without it: employee ages, home zip codes, and who’s covering dependents. Pull this into a clean spreadsheet before you call anyone — it speeds up quoting from weeks to days.
3. Get multiple quotes and compare on four axes. Work with a licensed broker (their commission is built into premiums either way) or quote directly. Compare every plan on the same four points: monthly premium, network breadth, out-of-pocket maximums, and drug coverage.
4. Set your employer contribution and check participation. Most carriers require you to cover at least 50% of the employee-only premium and enroll 70%+ of eligible employees. Verify you’ll clear both thresholds before you commit.
5. Attack a scary renewal before accepting it. Double-digit increases are common, but they’re a starting point, not a verdict. Shop competing carriers, adjust plan design (a higher deductible can cut premiums 10–20%), and have your broker negotiate. Never sign the renewal the day it arrives.

When to Bring in a Broker, Advisor, or Attorney

Here’s the part that surprises most first-time buyers: a licensed health insurance broker almost never costs you anything extra. Their commission is baked into the premium whether you use one or not, so going without a broker means leaving free help on the table. A good one shops multiple carriers, handles enrollment paperwork, and stays on call when an employee’s claim gets denied or your renewal spikes. For most small and mid-size employers, that’s all the expertise you need.

You move into more specialized territory when your situation gets complicated. A benefits advisor or third-party administrator (TPA) earns their fee if you’re self-funding, employing people across multiple states, or juggling layered compliance like ACA reporting at scale. An ERISA or employment attorney is worth the $300–$500/hour when you’re facing a plan-document dispute, a Department of Labor audit, or a question about your fiduciary obligations that a broker can’t answer.

How to vet a broker

• Confirm an active license in your state (every state insurance department has a free lookup).
• Ask which carriers they’re appointed with — you want several, not one.
• Request two or three client references your size, and check the Better Business Bureau.
• Expect transparency about how they’re paid.

So: figure out where your headcount puts you, pick your enrollment path, loop in a broker, and escalate to a TPA or attorney only when complexity demands it. That’s the whole map.