ACA Affordability Safe Harbors: W-2, Rate of Pay, and Poverty Line
Employers use three IRS safe harbors to show that coverage was affordable without knowing each employee’s household income. Each has a different test, a different timing, and different traps.
Why Safe Harbors Exist
Affordability under the law is tied to an employee’s household income, which an employer cannot know. The safe harbors give employers a way to test using information they already have.
What They Protect
The safe harbors apply to the Section 4980H(b) penalty. Meeting one means the coverage is treated as affordable for that employee for that purpose. They do not change whether the plan meets other requirements, and they do not decide an employee’s own eligibility for a credit. Employers should ask their tax adviser or counsel how a safe harbor fits their reporting. For a quick estimate, use our free employee premium percent of pay calculator.
Self-Only Coverage
Each test looks at the employee’s required contribution for the lowest-cost self-only coverage that provides minimum value, not family coverage. Family coverage cost is not part of the test, even if it is the choice many employees make. The plan being tested should be the lowest-cost option that meets minimum value, and that should be confirmed each year.
The 2026 Percentage
The required contribution percentage for plan years beginning in 2026 is 9.96 percent under Rev. Proc. 2025-25. The regulation text shows 9.5 percent as the base figure, which the IRS indexes each year. The percentage changes from year to year, so confirm it against the current IRS guidance each plan year. Build your contribution schedule for the next year only after the new figure is published.
Employer’s Choice
An employer may choose whether to use a safe harbor and may apply it to reasonable categories of employees, consistently within each category. If you use different approaches for different groups, document the groups and the reason, and keep the categories reasonable. Your tax adviser or counsel can confirm that your groupings are acceptable.
Not the Employee’s Test
Employees decide whether they qualify for a premium tax credit using their own household income. A safe harbor protects the employer, not the employee’s eligibility. An employee may have household income and other circumstances that differ from wages. The employer protection is about the employer penalty only, and employees may still ask questions, so communicate carefully and refer tax questions to a tax advisor.
Related Reporting
Affordability safe harbor choices connect to the codes on Form 1095-C. Our reporting guide covers how they are entered. The codes you use on the form should match the method you picked and applied. Coordinate with whoever prepares the forms, and keep documentation that shows how each employee was tested.
How Each Safe Harbor Works
The three tests trade administrative effort against how much room they leave. Many employers use the rate of pay or poverty line test to avoid waiting until year end.
Form W-2 Wages
The contribution must not exceed the percentage of the employee’s Form W-2 wages for the year. It is tested after year end, employee by employee, and the contribution must stay a consistent amount or percentage of wages. Because it is tested after year end, an employer may not know in advance whether every employee passes. Many employers build in a cushion and monitor wages through the year, then review results with their tax adviser.
W-2 Partial Years
For part-year employees, wages are scaled by the share of months with an offer of coverage. A month with at least one day of coverage or employment counts as a full month. Part-year employees are easy to get wrong, so use a clear process for start and termination dates. Ask your payroll provider or tax adviser to confirm how months are counted for your own workforce.
Rate of Pay, Hourly
For hourly employees, the monthly contribution is tested against 130 hours times the lower of the hourly rate on the first day of the coverage period or the lowest rate during the month. The test uses a standard number of hours instead of actual hours worked, which makes it predictable for hourly staff. Compare each hourly rate against the schedule, especially after raises and rate changes.
Rate of Pay, Salaried
For salaried employees, the test uses monthly salary as of the first day of the coverage period. It is not available if the salary is reduced, including through reduced hours. If hours or pay are cut, the test may no longer be available for that employee. Check with your tax adviser before changing the pay of anyone near the contribution limit.
Rate of Pay Example
At $20 an hour, the 2026 limit is 9.96 percent of 130 times $20, or $2,600. That caps the monthly contribution at about $258.96. The figures in this example change when the percentage is updated for a new year, so re-run the calculation each plan year. Use the actual rate for each hourly employee, as the example is only for illustration.
Federal Poverty Line
The contribution must not exceed the percentage of the federal poverty line for a single individual, divided by 12. The poverty line for the employee’s state is used. The poverty line is published by the federal government and updated periodically, and it can differ for some states. Check the current figure each year and use the right one for each employee’s work state.
Where Employers Go Wrong
Most failures come from changes made mid-year or from mixing methods without a consistent rule.
Switching Methods Mid-Year
Pick a method for each category of employees and apply it consistently. Changing the approach after seeing results can undermine the protection. Document the method before the plan year starts and keep notes about why you chose it. If you want to change approach, ask your tax adviser how and when to do it without weakening your position.
Pay Cuts and Hour Cuts
The rate of pay test is not available for salaried employees whose salary is reduced. Review it before reducing hours or pay. Employee conversations about reduced hours should include coverage affordability. Ask your tax adviser to run the numbers before the change takes effect, so you are not surprised by the effect on testing.
Contribution Changes
The W-2 safe harbor requires that the contribution remain a consistent amount or percentage of wages. Discretionary adjustments can break it. If a bonus or raise changes wages, make sure the contribution formula follows it consistently rather than being set case by case. Review the formula with your tax adviser and your payroll team.
Opt-Out Payments
Unconditional opt-out payments can affect affordability. See our opt-out payment guide before setting contributions. How an opt-out payment is treated depends on whether it is conditional and how it is structured. Ask your tax adviser or counsel to review the design before you add or change an opt-out payment.
Lowest-Cost Plan Test
The test uses the lowest-cost self-only option that provides minimum value. Check that the plan being tested actually meets minimum value. A plan that does not meet minimum value cannot be the one you test, so confirm the status with the carrier in writing. Re-check whenever the plan design changes at renewal.
Document Your Choice
Record which safe harbor applies to which category, with dates. A letter proposing a penalty is easier to answer with a written method. Keep this with your reporting file for the year, along with the wage data and the calculations. If you change methods for a future year, note the date, so each year’s file stands on its own.
ACA Affordability Safe Harbor Questions
What are the three affordability safe harbors?
Form W-2 wages, rate of pay, and the federal poverty line.
What is the 2026 affordability percentage?
9.96 percent for plan years beginning in 2026.
Which coverage is tested?
The lowest-cost self-only coverage that provides minimum value.
What is the 130-hour rule?
For hourly employees under the rate of pay test, monthly income is assumed to be 130 hours times the lower of the hourly rate on the first day of coverage or the lowest rate in the month.
Can the rate of pay safe harbor be used if salary is cut?
No, not for salaried employees whose salary is reduced, including through reduced hours.
Does the W-2 safe harbor require year-end testing?
Yes. It is determined after the year ends, employee by employee.
Which penalty do safe harbors protect against?
The Section 4980H(b) penalty.
Do safe harbors decide whether the employee gets a premium tax credit?
No. Employees use their own household income for that. Safe harbors protect the employer.
Is this legal advice?
No. This page is general information, not legal advice. Rules change and facts differ, so confirm your situation with your attorney or tax advisor.
Related Guides
Related reading: ACA Affordability Calculator · ACA Employer Mandate B Penalty · Opt-Out Payments and ACA Affordability · Variable-Hour Employees and the Look-Back Method · ACA 1094-C and 1095-C Reporting
Send us your renewal.
We’ll tell you whether it looks competitive, where we see opportunity, and the five questions we’d put to your carrier. No cost, and no obligation to move anything.
The renewal letter
Your current plan summary
Contribution split by tier
Enrolled counts by tier
Four documents — two more if your group is 50 or more. Nothing else; every extra one is a reason to postpone.
Laws and rules referenced
26 C.F.R. § 54.4980H-5 — Affordability and the three safe harbors (Form W-2 wages, rate of pay and federal poverty line) in paragraph (e)(2).
26 U.S.C. § 36B(c)(2)(C) — Employer coverage is affordable when the employee’s cost is within the percentage of household income the IRS sets each year.
Rev. Proc. 2025-25 and Rev. Proc. 2026-26 — Required contribution percentage: 9.96% for 2026 and 10.22% for 2027.
This page is general information, not legal or tax advice. Rules change and facts matter, so confirm your situation with counsel or a qualified advisor.
An independent employee benefits consulting firm. We look at the entire benefits program — cost, plan performance, risk and administration.
Switch to CFH. Unhappy with your broker? Your employees won’t notice. You will. →
Cookies on This Site
We use cookies to keep the site working properly and to understand how it is used. You can decline anything that is not essential. See our Privacy Policy for the detail.
- Essential — needed for the site to load and for you to move around it. These cannot be switched off.
- Analytics — tell us which pages get read, so we know what is worth writing more of.
- Advertising — set by third parties such as ad and social platforms to measure and target campaigns.