Medicare Supplement Annual Rate Increase Estimator: 5-Year Cost Projection

Medigap premiums increase every year. Understanding how these increases compound over time is essential for choosing the right plan and budgeting for retirement healthcare costs.

Quick Answer

Typical Annual Medigap Increases:

• Attained-age rating: 5-9% per year (age increases + inflation)
• Issue-age rating: 2-4% per year (inflation only)
• Community rating: 2-4% per year (inflation only)

5-Year Projection:

• Attained-age: Premiums increase 30-50%
• Issue-age/community: Premiums increase 10-20%

Use our Medicare Supplement Penalty Calculator to model your long-term costs.

Detailed Guidance

How Rating Methods Affect Increases

Attained-Age Rating (Most Common)

• Premium increases as you age
• Typical increase: 3-5% per birthday
• Plus 2-4% for medical inflation
• Combined: 5-9% annual increase
• Common in: FL, TX, CA, OH, PA

Issue-Age Rating

• Premium based on age when you buy
• Never increases due to age
• Only increases for inflation (2-4%)
• Better long-term value
• Common in: AZ, CO, ID, WA

Community Rating

• Same premium regardless of age
• Only increases for inflation/claims
• Best for older applicants
• Required in: AR, CT, MA, MN, NY, VT

5-Year Cost Projection Example

Plan G, Age 65, Non-Tobacco, Starting Premium $145/month

Attained-Age Rating:

Year	Age	Monthly Premium	Annual Premium	Cumulative Cost
1	65	$145	$1,740	$1,740
2	66	$156	$1,872	$3,612
3	67	$168	$2,016	$5,628
4	68	$181	$2,172	$7,800
5	69	$195	$2,340	$10,140

5-Year Increase: 34.5% ($50/month more)

Issue-Age Rating (Same Plan):

Year	Age	Monthly Premium	Annual Premium	Cumulative Cost
1	65	$165	$1,980	$1,980
2	66	$171	$2,052	$4,032
3	67	$178	$2,136	$6,168
4	68	$185	$2,220	$8,388
5	69	$192	$2,304	$10,692

5-Year Increase: 16.4% ($27/month more)

Key Insight: Issue-age costs $240 more in year 1, but only $28 more total after 5 years. By year 10, attained-age costs significantly more.

Historical Increase Patterns

Typical Annual Increases by Plan Type:

Plan Type	Low Increase	Average Increase	High Increase
Plan A	3-4%	5-6%	7-8%
Plan G	4-5%	6-7%	8-9%
Plan N	3-4%	5-6%	7-8%
Plan F*	5-6%	7-8%	9-10%

*Plan F shows higher increases due to shrinking risk pool (pre-2020 enrollees only)

Factors That Cause Higher Increases:

• Your age (attained-age policies)
• General medical inflation (2-4%)
• Claims experience in your state
• Insurer’s pricing strategy
• Policyholder aging (average age of plan members)

Rate Increase Warning Signs

Red Flags:

• Increases exceeding 10% for multiple years
• Increases higher than state average
• Insurer leaving your state
• Plan discontinuation warnings

What To Do If Increases Are High:

1. Compare with other insurers (you may need underwriting)
2. Consider switching to less comprehensive plan
3. Check if your state has guaranteed issue windows
4. Consult with insurance agent

Estimating Your Future Premiums

Quick Formula:

Future Premium = Current Premium × (1 + Annual Increase Rate)^Years

Example: $150 premium, 7% annual increase, 5 years: $150 × (1.07)^5 = $150 × 1.40 = $210/month

Budgeting Rule of Thumb:

• Attained-age: Plan for premium to double by age 80
• Issue-age: Plan for 50-60% increase by age 80
• Community: Plan for 50-60% increase by age 80

Rate Increase Planning Checklist

• Identify your policy’s rating method
• Check your insurer’s 5-year increase history
• Calculate 5-year and 10-year projections
• Compare issue-age vs attained-age options
• Build healthcare budget with projected increases
• Review premium notice annually
• Consider switching if increases exceed 10%
• Use our calculator for projections

Frequently Asked Questions

Do all Medigap plans increase at the same rate?

No. Plan F often shows higher increases due to the shrinking pool of pre-2020 enrollees. Plans G and N typically have more stable increases.

Can my insurer increase my premium by any amount?

State insurance departments regulate Medigap increases. Insurers must justify increases and get approval. However, 5-9% annual increases are common.

Should I switch plans to avoid high increases?

Switching requires medical underwriting outside Open Enrollment. Only switch if you’re healthy and can pass underwriting, or if you have guaranteed issue rights.

How do I find my insurer’s increase history?

1. Check your annual premium notices
2. Call your insurer and request rate history
3. Check state insurance department website
4. Ask insurance agents for market comparisons

Will my premium ever decrease?

No, Medigap premiums rarely decrease. They may stay the same in rare years, but the long-term trend is always upward.

Related Resources

• Medigap Price by Age Chart
• Medicare Supplement Plan Cost Estimator
• Medicare Supplement Penalty Calculator

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