Open Enrollment 2026: Key Dates, Tips, and What to Know

# Open Enrollment 2026: Key Dates, Tips, and What to Know

Open enrollment is the annual period during which you can sign up for new health insurance, switch plans, or make changes to your existing coverage. Outside this window, you generally cannot change your plan unless you experience a qualifying life event.

Key Dates for 2026

### US — ACA Marketplace - Open enrollment: November 1, 2025 – January 15, 2026 - Coverage start date: January 1 (if enrolled by December 15), February 1 (if enrolled by January 15) - Some states with their own marketplaces (California, New York, Massachusetts, etc.) may have extended deadlines

### US — Employer-Sponsored Plans - Typically October–November (varies by employer) - Your HR department will announce specific dates

### US — Medicare - Annual Enrollment Period (AEP): October 15 – December 7 (for coverage starting January 1) - Medicare Advantage Open Enrollment: January 1 – March 31 (for switching MA plans or returning to Original Medicare)

### Germany - GKV: Can switch insurers at any time with a 12-month minimum membership - PKV: Annual switching is possible but complex; consult a broker

### Switzerland - Switch basic insurance: By November 30 for coverage starting January 1 - Insurers must announce new premiums by late October

### Australia - No fixed enrollment period — you can change private health insurance at any time - But watch the April 1 annual premium increase — switching in March locks in the old rate

### UK - NHS: No enrollment needed (automatic for residents) - Private insurance: No fixed enrollment — can purchase anytime

Qualifying Life Events (US)

If you miss open enrollment in the US, you can still enroll during a Special Enrollment Period (SEP) if you experience a qualifying event:

• Marriage or divorce
• Birth or adoption of a child
• Loss of other health coverage (job loss, ageing off parent's plan)
• Moving to a new state or coverage area
• Becoming a US citizen
• Leaving incarceration
• Income change that affects eligibility for Medicaid or marketplace subsidies

You typically have 60 days from the qualifying event to enroll. Do not let this window pass.

Tips for a Successful Open Enrollment

### 1. Start Early Do not wait until the last day. Technical issues, website crashes, and processing delays are common near deadlines. Start comparing plans in the first week of open enrollment.

### 2. Review Your Current Plan's Changes Your current plan may have changed its premiums, deductible, copays, network, or formulary for the new year. Read the annual notice of changes that your insurer sends. Do not assume everything is the same.

### 3. Estimate Next Year's Healthcare Usage Think about what medical services you anticipate needing: - Any planned procedures or surgeries? - New medications? - Pregnancy? - Changes in how often you see doctors?

Use this estimate to calculate total expected costs under each plan.

### 4. Check Your Doctors and Medications Networks and formularies change annually. Confirm: - Your doctors are still in-network - Your medications are still covered and on the same formulary tier - Your preferred hospital is still in-network

### 5. Update Your Income Information If your income has changed, update it when applying through the marketplace. This ensures you get the correct subsidy amount. Overestimating income means you leave subsidy money on the table. Underestimating means you may owe money at tax time.

### 6. Consider Life Changes Did anything change this year that affects your needs? - New family member? - Diagnosed with a new condition? - Started or stopped a medication? - Changed jobs or income? - Planning to move?

Align your plan choice with your current reality, not last year's.

### 7. Compare at Least Three Plans Do not just look at the cheapest premium. Calculate total annual cost (premiums + expected out-of-pocket) for at least three plans. Our plan comparison guide walks you through the methodology.

### 8. Do Not Forget Dental and Vision These are often separate from medical insurance. If you need dental work (cleanings, cavities, orthodontics) or vision care (glasses, contacts, eye exams), evaluate standalone dental and vision plans during enrollment.

Common Open Enrollment Mistakes

### Auto-Renewing Without Reviewing The biggest mistake. Plans change every year, and auto-renewal means you accept whatever changes your insurer made — even if another plan is now a better fit.

### Choosing the Lowest Premium A plan with a $200/month premium and a $5,000 deductible costs more than a $350/month plan with a $1,000 deductible if you use more than minimal care. Always compare total cost.

### Forgetting to Add a New Family Member If you had a baby, got married, or adopted a child, add them to your plan. You typically have 30–60 days from the event, but open enrollment is another opportunity.

### Not Checking Subsidies Income changes throughout the year. If your income dropped, you may now qualify for larger subsidies. If it increased, you may need to adjust to avoid a tax-time surprise.

What Happens If You Miss Open Enrollment?

If you miss the window and do not have a qualifying life event: - US: You go without marketplace insurance until the next open enrollment (unless eligible for Medicaid, which has no enrollment period). - Switzerland: You may face surcharges or be auto-assigned to an insurer. - Germany (GKV): You can switch at any time, so missing a specific window is less of an issue.

In the US, going without insurance means no ACA protections and potential financial risk from medical events. Do not let this happen.

Bottom Line

Open enrollment is the most important annual financial decision most people make — and most people do not give it enough attention. Set a calendar reminder, do your research, and make an active choice. The plan you enroll in will shape your healthcare costs and access for the entire year.