Colorado Section 125 Plan Guide for Employers (2026)

2026-03-24 • 17 min read

Colorado-specific context on Section 125 plans, including how pre-tax deductions interact with the 2026 FAMLI premium rates and state withholding rules.

Colorado Section 125 Plan Guide for Employers (2026)

Colorado employers manage mixed workforces across urban centers and rural communities. That means benefits must be affordable and administratively clean. A Section 125 plan improves affordability by shifting eligible employee contributions to pre‑tax payroll, lowering employer payroll taxes and increasing take‑home pay.

CMS reports 266,988 Marketplace plan selections in Colorado during the 2026 open enrollment period. That’s a strong signal that employees are comparing employer coverage to individual options, especially in a state with a visible marketplace brand.

Colorado Market Signal You Can’t Ignore

Colorado operates a state‑based Marketplace and has expanded Medicaid. In practice, that means employees are more aware of coverage options and more price‑sensitive. Section 125 helps employers compete on net pay, which matters as much as plan design.

Colorado Coverage Strategy (Employer View)

| Strategy | Primary Goal | Best Fit |

| --- | --- | --- |

| Traditional group plan | Stability | Full‑time teams with low turnover |

| Fixed employer contribution | Budget control | Multi‑location employers |

| Group plan + Section 125 | Net‑pay boost | Teams with cost sensitivity |

Section 125 isn’t a replacement for coverage. It’s the payroll layer that improves the economics of whatever plan you already have.

Colorado Cost Drivers (What You Can Control)

  • Employer contribution level
  • Plan design and deductibles
  • Participation rate
  • Pre‑tax vs after‑tax deductions

Only the last item immediately reduces payroll taxes, which is why Section 125 is often the fastest ROI lever.

Colorado Implementation Timeline

  1. Week 1: Eligibility + contribution design
  2. Week 2: Payroll setup + plan document
  3. Week 3: Employee elections + FAQs
  4. Week 4: Launch and payroll audit

Summit Health Benefits supports the full process as your advisor/administrator. Start with the Section 125 overview.

Colorado Paycheck Example (Illustrative)

| Example | After‑tax | Pre‑tax |

| --- | --- | --- |

| Employee contribution | Taxed wages | Pre‑tax wages |

| Employer payroll tax cost | Higher | Lower |

| Employee net pay | Lower | Higher |

The exact impact depends on wages and contributions, but the direction is consistent.

Colorado Employee Communication Wins

  • Use a one‑page paystub visual.
  • Explain the difference between “gross pay” and “taxable pay.”
  • Share official W‑2 guidance for clarity.

Helpful links:

Colorado FAQs

Do we need a written plan document?

Yes. Pre‑tax deductions require a Section 125 plan document.

Can we keep our carrier?

Yes. Section 125 works with your existing plan.

Is this only for large employers?

No. Small employers often see the fastest payroll tax ROI.

Next Step for Colorado Employers

Sources

  • CMS 2026 Marketplace plan selections by state (Colorado platform and enrollment): https://www.cms.gov/newsroom/fact-sheets/marketplace-2026-open-enrollment-period-report-national-snapshot-2
  • CMS state-based exchange list (Colorado SBE): https://www.cms.gov/cciio/resources/fact-sheets-and-faqs/state-marketplaces
  • Medicaid expansion status by state: https://www.kff.org/medicaid/issue-brief/status-of-state-medicaid-expansion-decisions-interactive-map/