ACA Affordability Test Calculator

Enter your annual income, monthly employee premium contribution, and the current IRS affordability threshold to determine if employer coverage passes the ACA affordability test.

Created by Luis GonzalezLast updated: 2026-06-08

How to Use This Calculator

1
Enter Income & Premium Details
Input the employee's annual household income (W-2), their monthly premium share for the lowest-cost self-only plan, the current IRS affordability threshold percentage, and select the coverage type (self-only or family).
2
Review Your Results
The calculator shows Pass/Fail status with actual % of income, Max Affordable Monthly Premium, Monthly Affordability Gap, Annual Employee Premium Share, Annual Max Affordable Premium, and Monthly Household Income. The Insights card shows compliance buffer, penalty risk, and cost context.

Example Calculation

An employer needs to verify if their lowest-cost self-only plan is affordable for an employee earning $65,000/yr who pays $150/mo.

Annual Household Income

$65,000

Employee Monthly Premium Share

$150

ACA Affordability Threshold

9.12%

Coverage Type

Self-Only Coverage

Results

Passes ACA Affordability Test

2.77%

Max Affordable Monthly Premium

$494.00

Monthly Affordability Gap

$344.00

Annual Employee Premium Share

$1,800.00

Annual Max Affordable Premium

$5,928.00

Monthly Household Income

$5,416.67

Insights card shows $344/mo compliance buffer, no penalty risk, and cost context.

Tips

Track Annual IRS Threshold Changes

The threshold changes yearly: 9.12% (2023), 9.02% (2025). In the example at 9.12%, the max affordable premium is $494/mo. A drop to 9.02% lowers it to $488.58 — still passing at $150/mo, but reducing the $344 buffer to $338.58.

Use Safe Harbors Strategically

Three safe harbors exist: Form W-2, Rate of Pay, and Federal Poverty Line (FPL). The FPL safe harbor is simplest — if the employee's share doesn't exceed 9.12% of the FPL ($14,580 in 2023), coverage is affordable regardless of actual income.

Monitor Your Compliance Buffer

The example has $344/mo of headroom before failing. If you plan premium increases, ensure they don't push the employee contribution above the max affordable amount ($494/mo in this case). Even $1 over triggers a potential penalty.

The ACA Affordability Test Calculator determines if employer health coverage meets Affordable Care Act standards.

With $65,000 annual income, $150/mo employee premium, and a 9.12% threshold, the plan passes — the employee pays just 2.77% of income, well below the 9.12% limit.

The max affordable premium is $494/mo, leaving $344/mo of compliance headroom.

Annual employee share of $1,800 is $4,128 under the $5,928 annual cap.

The Affordability Test Formula

The ACA test compares an employee's premium contribution to a percentage of their household income.

If the contribution stays below the IRS threshold, coverage is affordable.

Monthly Income = Annual Household Income / 12
Max Affordable Monthly Premium = (ACA Threshold / 100) x Monthly Income
Affordability Gap = Max Affordable Premium - Employee Monthly Share
Actual % of Income = (Annual Employee Share / Annual Income) x 100
Annual Max Affordable = Max Affordable Monthly x 12

If the Affordability Gap is zero or positive, the plan passes.

The IRS threshold changes annually — 9.12% for 2023, 9.02% for 2025.

💡 For employers managing payroll and benefits compliance, our Holiday Pay Calculator can help ensure accurate compensation calculations.

Worked Example: Testing Affordability for a $65,000 Employee

An ALE (50+ employees) needs to verify compliance for an employee's self-only coverage.

Inputs:

Annual Household Income: $65,000
Employee Monthly Premium Share: $150
ACA Affordability Threshold: 9.12%
Coverage Type: Self-Only

Step-by-step:

Monthly Income: $65,000 / 12 = $5,416.67
Max Affordable Monthly Premium: 9.12% x $5,416.67 = $494.00
Affordability Gap: $494.00 - $150 = $344.00 (passes)
Actual % of Income: $1,800 / $65,000 = 2.77% (below 9.12%)
Annual Max Affordable: $494.00 x 12 = $5,928.00
Annual Surplus: $5,928 - $1,800 = $4,128.00 headroom

The plan comfortably passes with 2.77% vs. the 9.12% limit.

The employer could charge up to $494/mo before failing — $344/mo more than the current $150 premium.

💡 To calculate full-time equivalent employees for ALE determination, try our ACA Full-Time Equivalent Calculator.

ACA Employer Mandate and Penalty Context

The ACA's Employer Shared Responsibility Provisions require ALEs (50+ full-time equivalent employees) to offer affordable, minimum essential coverage.

Two penalty types apply:

Section 4980H(a): If an ALE fails to offer coverage to 95%+ of full-time employees, the penalty is ~$2,970/employee/year (2024) for the entire workforce minus 30.
Section 4980H(b): If coverage is offered but is unaffordable (fails this test), the penalty is ~$4,460/employee/year (2024), but only for employees who receive Marketplace tax credits.

In the example, with $344/mo of buffer, this employer has strong protection against both penalty types.

Employers should reassess affordability annually as thresholds and premiums change.

Frequently Asked Questions

How does the ACA affordability test work?

The test compares an employee's monthly premium share to the IRS threshold percentage of their income. In the example, $150/mo is 2.77% of $65,000 annual income — well below the 9.12% threshold. The max affordable premium is $494/mo ($5,928/yr), leaving $344/mo of headroom. If the premium exceeded $494/mo, the plan would fail and expose the employer to IRS Section 4980H(b) penalties.

What penalties apply if an employer fails the ACA affordability test?

Under IRS Section 4980H(b), if coverage is unaffordable and at least one full-time employee receives a Marketplace premium tax credit, the employer faces penalties of approximately $4,460 per affected employee per year (2024 rate), prorated monthly. In the example, the $344/mo buffer means this employer is well-protected, but an employer with a $500/mo premium on the same $65,000 salary would fail and face penalties.

What are the three ACA safe harbors?

Employers can demonstrate affordability using: (1) Form W-2 Safe Harbor — premium doesn't exceed threshold % of Box 1 W-2 wages; (2) Rate of Pay Safe Harbor — premium doesn't exceed threshold % of monthly wages at the employee's lowest rate of pay; (3) Federal Poverty Line Safe Harbor — premium doesn't exceed threshold % of the FPL for a single individual. Each has pros and cons — the FPL method is simplest but may be harder to pass for lower-income employees.