Affordability is the single most consequential compliance concept in ICHRA design. Get it right and your contribution strategy holds up. Get it wrong and employees lose subsidy eligibility they didn't know they'd forfeited — and your company may face ALE penalty exposure you didn't anticipate.
Here's how it works.
What "Affordable" Means Under the ACA
Under the ACA, employer-sponsored coverage is considered affordable if the employee's required premium contribution for employee-only coverage doesn't exceed a set percentage of household income. For 2026, that threshold is 9.02%.
For traditional group plans, this calculation is straightforward: take the employee's monthly premium share for self-only coverage, divide by their household income, and compare to 9.02%.
For ICHRA, the mechanics are slightly different. The IRS tests affordability by asking: after applying the employer's ICHRA allowance, can the employee purchase the lowest-cost silver plan available in their rating area for less than 9.02% of their household income?
If yes — the ICHRA is affordable. The employee is ineligible for ACA premium tax credits (PTCs) for marketplace coverage.
If no — the ICHRA is unaffordable. The employee can opt out of the ICHRA, purchase marketplace coverage, and potentially claim PTCs.
The Problem Employers Face
Employers rarely know their employees' actual household income. The ACA's affordability standard is technically based on household income, but no employer has the right to demand that figure from employees.
This is where the safe harbors come in. The IRS provides three alternative calculation methods that employers can use instead of actual household income. If your ICHRA contributions satisfy any one of these three tests, you're in compliance — even if the employee's true household income would produce a different result.
Safe Harbor 1: W-2 Wages
The W-2 safe harbor uses Box 1 wages from the employee's most recent W-2 as a proxy for household income.
How it works:
- Take the employee's Box 1 W-2 wages from the prior year
- The ICHRA allowance is affordable if the employee's net premium cost (lowest-cost silver plan minus the ICHRA allowance) doesn't exceed 9.02% of those W-2 wages
Example: An employee earned $52,000 in Box 1 wages last year. The lowest-cost silver plan in their rating area costs $480/month. For the ICHRA to be affordable under this safe harbor, the employer's monthly allowance must be at least $480 − ($52,000 × 9.02% / 12) = $480 − $390.87 = $89.13 or more per month.
When to use it: Best suited for salaried employees with stable, predictable compensation. Less useful for hourly or variable-pay employees where W-2 wages fluctuate year to year.
Key limitation: W-2 wages can understate household income (spouse income isn't captured), so this safe harbor can be conservative from the employer's perspective. It may result in higher required contribution levels than the rate-of-pay or FPL methods.
Safe Harbor 2: Rate of Pay
The rate of pay safe harbor uses the employee's current hourly wage or monthly salary — not prior-year W-2 data.
How it works for hourly employees:
- Multiply the employee's hourly rate by 130 hours to get a monthly income figure
- Apply the 9.02% threshold against that monthly figure
How it works for salaried employees:
- Use the monthly salary directly
Example (hourly): An employee earns $19/hour. Monthly income proxy = $19 × 130 = $2,470. For the ICHRA to be affordable, net employee premium cost must not exceed $2,470 × 9.02% = $222.79/month. If the lowest-cost silver plan is $350/month, the employer must contribute at least $350 − $222.79 = $127.21/month.
When to use it: The most practical safe harbor for most employers. It uses current, verifiable compensation data without requiring last year's W-2, and applies cleanly to hourly workforces.
Key limitation: Rate of pay cannot be used if the employee's rate decreases during the year. The calculation must be re-run if compensation changes.
Safe Harbor 3: Federal Poverty Level
The FPL safe harbor is the simplest of the three. Instead of using any employee-specific income data, it uses the federal poverty level for a single individual.
How it works:
- The ICHRA is affordable if the employee-only net premium cost doesn't exceed 9.02% of the federal poverty level for a single individual (in the continental U.S.)
- For 2026, the FPL for a single individual is $15,060/year, making the monthly affordability threshold $113.20/month
In practice: if the employer's ICHRA allowance brings the employee's out-of-pocket cost for the lowest-cost silver plan down to $113.20/month or less, the ICHRA is affordable under this safe harbor regardless of what the employee actually earns.
When to use it: Ideal for employers who want maximum simplicity and are willing to set contribution levels high enough to meet the FPL threshold in every market. Often results in the most generous contribution floors because FPL is lower than most actual employee wages.
Key limitation: It may require larger contributions in high-cost markets. If the lowest-cost silver plan is $600/month and the FPL threshold is $113.20, the employer must contribute at least $486.80/month to hit the safe harbor — which may or may not align with the employer's budget.
What's at Stake If You Get This Wrong
For employees: An employee who receives an affordable ICHRA offer — even inadvertently — loses eligibility for premium tax credits. If the employer's contribution math is wrong in the employer's favor (i.e., the employer believes the ICHRA is affordable when it isn't), the employee may incorrectly forego PTC eligibility without realizing it.
For Applicable Large Employers (50+ FTEs): ALEs that fail to offer affordable minimum value coverage face potential Section 4980H(b) penalties. For 2026, this penalty is approximately $4,460 per year per full-time employee who receives a PTC. These penalties are triggered by employee PTC filings, not by employer self-reporting.
For non-ALEs: Employers under 50 FTEs don't face the 4980H penalty, but employees who receive an "affordable" ICHRA — even if technically miscalculated — still lose PTC eligibility. The employer exposure may be limited, but the employee harm is real.
Choosing the Right Safe Harbor
There's no single right answer, but here's the practical decision logic:
| Situation | Recommended Safe Harbor |
|---|---|
| Stable salaried workforce, clean W-2 data | W-2 or Rate of Pay |
| Hourly workforce, variable hours | Rate of Pay (130-hour method) |
| Multi-state employer, varying plan costs | FPL (simplest to administer uniformly) |
| Employer wants highest certainty, willing to contribute more | FPL |
| Employer wants to minimize contribution floor | Rate of Pay (usually produces lowest required contribution for higher earners) |
Most ICHRA administrators provide an affordability calculator that runs all three safe harbors and shows which produces the lowest required contribution for your workforce. Use it. Don't guess.
The Bottom Line
Affordability compliance isn't optional — it's the mechanism that determines whether your employees retain access to federal subsidies and whether you face penalty exposure as an ALE. The three safe harbors exist specifically because Congress knew employers couldn't access employee household income data.
Pick the safe harbor that fits your workforce composition, model the required contribution levels per rating area before you set your plan, and document your methodology. If your administrator can't show you this math, find one that can.