The most common early retirement planning mistake isn't portfolio allocation or Social Security timing. It's healthcare. People spend years building a retirement number, run their calculations to age 62, decide the math works — and then discover that health insurance between age 62 and Medicare eligibility at 65 will cost $25,000-35,000 in premiums alone if they're not careful. That three-year gap, unplanned for, can derail an otherwise solid early retirement plan.
The good news is that the gap is manageable with the right approach. The bad news is that the right approach requires understanding COBRA rules, ACA marketplace mechanics, income thresholds for subsidies, and Roth IRA withdrawal tax treatment — four separate subjects that most financial planners don't cover in a single integrated conversation until the client is already 60 and close to the decision.
Understanding the Coverage Gap
Why Age 62 and Age 65 Don't Connect Automatically
Medicare eligibility is fixed at age 65 for most Americans. There is no option to start Medicare early at 62, 63, or 64 — even if you've paid into it your entire working career. The only exceptions are a disability determination (24-month waiting period after qualifying), end-stage renal disease, or ALS. Otherwise, you wait until 65.
Social Security is different. You can start Social Security retirement benefits as early as 62, at a permanent reduction of approximately 25-30% of your full benefit. Starting Social Security at 62 does not activate Medicare. The two programs run on different eligibility rules entirely.
This means a 62-year-old who retires faces three years of self-funded health coverage before Medicare. At average costs for this age group, that's a six-figure planning variable that most retirement calculators handle poorly.
Option 1: COBRA Continuation Coverage
Same Plan, Full Price — and a Hard 18-Month Limit
COBRA allows you to continue your employer's group health insurance for up to 18 months after leaving a job involuntarily or voluntarily, as long as you were covered under the employer plan. The catch: you now pay the full premium — both what you were paying as the employee contribution plus what your employer was paying — plus a 2% administrative fee.
The average employer-sponsored health plan in 2023 cost $8,435/year for employee-only coverage and $23,968/year for family coverage (Kaiser Family Foundation annual survey). Employees typically paid about $1,400/year for individual and $6,100/year for family — the employer paid the rest. Under COBRA, you pay the entire $8,435 or $23,968 plus the 2% fee.
Realistic COBRA costs for a 62-year-old:
Individual coverage: $680-920/month depending on plan and location
Family coverage (two spouses retiring together): $1,800-2,400/month
COBRA's advantage is continuity — same plan, same network, same doctors, same deductibles you've already been accumulating toward in the calendar year. For someone managing a chronic condition or mid-year in a health situation, continuity can be worth the premium cost.
The critical limitation: COBRA ends at 18 months. A 62-year-old who retires and takes COBRA is still 18 months short of Medicare eligibility. After COBRA ends — 18 months before the Medicare start date — they must find other coverage, typically through the ACA marketplace.
Option 2: ACA Marketplace Coverage
The Subsidy Math That Changes Everything
The ACA marketplace allows anyone without access to employer coverage to purchase individual health insurance, with premium tax credits (subsidies) available based on household income. For early retirees who carefully manage their taxable income, the ACA marketplace is often significantly less expensive than COBRA — sometimes dramatically so.
Unsubsidized ACA premiums for a 62-year-old (2024 estimates):
Bronze plan (high deductible, lower premium): $550-750/month
Silver plan (benchmark plan, moderate deductible): $720-970/month
Gold plan (lower deductible, higher premium): $900-1,200/month
Note: Premiums vary significantly by state and county. States like New York have much higher premiums than Southern states. A 62-year-old in rural Mississippi may see $480/month silver plan premiums; a 62-year-old in upstate New York may see $1,300.
Subsidized ACA premiums — where the real planning opportunity lives:
ACA premium tax credits reduce your monthly premium based on your household income as a percentage of the Federal Poverty Level. The key thresholds for a single person in 2024:
- Below 138% FPL (~$20,120): Medicaid-eligible in expansion states (essentially free coverage)
- 138%-200% FPL ($20,120-$29,160): Heavy subsidies; premium capped at 0-2% of income
- 200%-300% FPL ($29,160-$43,740): Meaningful subsidies; premium capped at 2-6% of income
- 300%-400% FPL ($43,740-$58,320): Moderate subsidies; premium capped at 6-8.5% of income
- Above 400% FPL (above $58,320): Subsidies still available; premium capped at 8.5% of income (thanks to the Inflation Reduction Act enhanced subsidies, extended through 2025)
What this means in practice for a single early retiree:
A 62-year-old with $35,000 in annual MAGI (Modified Adjusted Gross Income) is at 240% of FPL. The ACA caps their benchmark silver plan premium at approximately 4.5% of income: $35,000 × 4.5% = $1,575/year = $131/month. If the unsubsidized silver plan is $850/month, the subsidy is $719/month — the government pays $719 and the retiree pays $131.
A couple with $55,000 in combined MAGI is at approximately 340% of FPL. Their premium cap is about 7.5% of income: $55,000 × 7.5% = $4,125/year = $344/month for both. The subsidy covers the rest of a benchmark silver plan premium.
The Income Management Strategy: How Roth Withdrawals Change the Subsidy Calculation
The Most Important Early Retirement Healthcare Planning Technique
ACA subsidies are based on MAGI, which for retirees includes: Social Security income (at 50-85% inclusion depending on total income), traditional IRA and 401k withdrawals (fully counted as income), capital gains and dividends (fully counted), and interest income (fully counted).
Roth IRA withdrawals are not counted as income for ACA purposes. Roth contributions have already been taxed, and qualified distributions — from a Roth IRA you've held for at least 5 years and are over 59½ — are completely tax-free and completely excluded from MAGI.
This creates a specific strategy for the 62-65 gap:
High-subsidy scenario (primarily Roth withdrawals):
Annual expenses: $45,000
Source: $35,000 from Roth IRA (not counted as MAGI) + $10,000 from traditional IRA (counted)
Total MAGI: $10,000
ACA subsidy: massive — potentially Medicaid-eligible in an expansion state
Healthcare cost: $0-50/month
Low-subsidy scenario (traditional IRA withdrawals):
Annual expenses: $45,000
Source: $45,000 from traditional IRA (all counted as MAGI)
Total MAGI: $45,000 (plus any Social Security if claimed)
ACA subsidy: moderate — premium around $180-250/month
No-subsidy scenario (too much traditional income):
Annual expenses: $70,000
Source: $70,000 from traditional 401k
Total MAGI: $70,000
Income over 400% FPL but subsidies still cap at 8.5%: $70,000 × 8.5% = $5,950/year = $496/month
Healthcare cost: ~$496/month
The income management strategy isn't about living on less — it's about which account you pull from. The same $45,000 annual spending costs $0/month in healthcare premiums if funded from Roth accounts vs $180-250/month if funded from traditional accounts. Over 3 years, that's a $6,480-$9,000 difference on the same spending level.
This is why building a Roth IRA well before age 62 — and executing Roth conversions in lower-income years — directly subsidizes early retirement healthcare costs. For the mechanics of Roth IRA contributions and the backdoor Roth strategy for higher earners who want to build Roth assets before retirement, our complete Roth IRA guide covers the qualification rules, income limits, and conversion strategy. And for the integrated decision of when to begin Social Security — which also affects MAGI and ACA subsidy eligibility — our analysis of Social Security at age 62 vs 70 and the break-even with $500,000 in savings shows how claiming age affects both your annual benefit and your ACA-eligible income, which interact. For the withdrawal sequencing question in retirement — when to pull from Roth vs traditional vs taxable accounts — our guide to the right order to withdraw from a 401k, Roth IRA, and taxable account in early retirement covers the withdrawal strategy that feeds directly into the ACA subsidy calculation each year.
The 3-Year Cost Comparison: What You Actually Spend on Healthcare Ages 62-65
For a single early retiree, the range is enormous depending on income management:
Best case (Roth-heavy income, Medicaid expansion state):
Healthcare cost: $0-50/month
3-year total: $0-1,800
Good case (managed MAGI at ~$30,000, ACA subsidized):
Healthcare cost: ~$130-200/month
3-year total: $4,680-7,200
Middle case (MAGI $50,000, moderate subsidy):
Healthcare cost: ~$300-400/month
3-year total: $10,800-14,400
COBRA for 18 months then ACA unsubsidized for 18 months:
COBRA: $800/month × 18 months = $14,400
ACA unsubsidized: $850/month × 18 months = $15,300
3-year total: $29,700
The gap between the best case ($0-1,800) and the worst case ($29,700) is determined almost entirely by income management strategy. The actual healthcare delivered is similar — a subsidized ACA silver plan covers the same categories as COBRA. The quality of coverage difference between the high-cost and low-cost scenarios is minimal. The income planning difference is everything.
For the comprehensive retirement planning framework that incorporates healthcare costs, Social Security timing, and withdrawal sequencing together, Work Optional by Tanja Hester is the clearest guide to early retirement planning available — it covers the 62-65 healthcare gap specifically, including the MAGI management strategy for ACA subsidies that most generic retirement books skip entirely. And a comprehensive Medicare enrollment guide is worth having the year before your 65th birthday — the Medicare Initial Enrollment Period, the Part B premium surcharges for higher earners (IRMAA), and the supplemental coverage decisions at Medicare enrollment are a separate planning project from the 62-65 gap, and getting them wrong can be costly in ways that are difficult to reverse.