There Are No Income Limits for Medigap — But That’s Not the Whole Story
Your income has zero effect on whether you can buy a Medicare supplement plan. Zero. It doesn’t matter if you’re pulling in $200,000 a year in retirement or living mostly on Social Security. Medigap carriers cannot deny you coverage or charge you more because of what you earn. That part is simple and clean.
What does affect your access to Medigap is trickier, and it trips up a lot of people who assume that since they’re on Medicare, they can just sign up for a supplement whenever they’re ready. That assumption costs people real money. I’ve watched folks in their late 60s get hit with medical underwriting — or flat-out denied — because they waited too long or missed a window they didn’t know existed.
So let’s clear up exactly what determines your Medigap eligibility, why the rules are structured this way, and where you actually need to pay attention.
What Actually Controls Medigap Eligibility
Since income isn’t a factor, what is? Three things matter: your age, your Medicare enrollment status, and your timing relative to key enrollment windows.
To buy a Medigap plan, you must already be enrolled in Medicare Part A and Part B. That’s the foundation. Medigap is a supplement to original Medicare — it pays the gaps that original Medicare leaves behind, like the 2026 Part B deductible of $257, the Part A deductible of $1,676 per benefit period, and the 20% coinsurance that Medicare leaves on the table for most outpatient services. If you’re in a Medicare Advantage plan, you can’t hold a Medigap plan at the same time. That’s not an opinion; it’s federal law.
Beyond that, eligibility comes down almost entirely to timing. Here’s where it gets real.
When you first enroll in Part B, you get a six-month Open Enrollment Period. During that window, insurers cannot turn you down, cannot charge you more for health conditions, and cannot make you wait for coverage to kick in (with very narrow exceptions for pre-existing conditions within the first six months). You are a guaranteed-issue applicant, full stop.
Outside that window? Most states let insurers medically underwrite you. That means they can ask about your health history, charge you more based on it, or deny you coverage entirely. The whole point of that six-month window is to get people enrolled before insurers have an incentive to cherry-pick the healthiest applicants.
The Guaranteed Issue Rights That Can Protect You Later
If you miss your Open Enrollment window, you’re not completely without options. There are specific situations called guaranteed issue rights that give you a second shot at Medigap without underwriting. These rights exist because Congress recognized that people sometimes end up back on original Medicare through no fault of their own.
The most common situations that trigger guaranteed issue rights include:
- Your Medicare Advantage plan is leaving the area or ending its contract with Medicare
- You move out of your Medicare Advantage plan’s service area
- You lost employer-sponsored coverage that was supplementing Medicare
- You enrolled in Medicare Advantage when you first became eligible and now want to switch back to original Medicare within your first year
- Your Medigap insurer goes bankrupt or leaves your state
In those cases, you’re entitled to enroll in certain Medigap plans — usually Plan A, B, C, D, F, G, K, or L depending on the situation — without answering health questions. The plans available to you under guaranteed issue vary by the triggering event, and the specifics are set by federal law.
That said, these rights are time-limited. You typically have 63 days from a triggering event to act. Miss that window, and you’re back to medical underwriting in most states.
The Common Misconception That Gets People in Trouble
I’ve seen this mistake more times than I can count: someone retires at 62, keeps their spouse’s employer coverage, turns 65, enrolls in Medicare Part A (which is free, so why not?), but doesn’t enroll in Part B because they’re still covered by the employer plan. Fine. That’s actually a smart move and a legitimate exception.
But then the spouse retires at 67. The employer coverage ends. The 65-year-old now needs to enroll in Part B and finally get a Medigap plan. Here’s what they often believe: “I’m just now signing up for Part B, so my Medigap Open Enrollment window starts now.” And that’s true.
The mistake comes when someone didn’t have creditable coverage during the years they delayed Part B. Maybe they just forgot to enroll in Part B, or they thought Medicare Advantage would be enough and then dropped it. Now they’re 68, never had qualifying coverage, and they want to add Medigap. In most states, they’re walking into medical underwriting with no guaranteed rights to protect them.
The other version of this mistake: enrolling in Medicare Advantage at 65 because the $0 premium looked attractive, staying in it for three years, then deciding you want original Medicare plus a Medigap plan. Unless you’re in your first year of Medicare Advantage (when you have a trial right to return to original Medicare), you’ve lost your guaranteed issue protections in most states. At 68, with a few health issues that accumulated over those years, you might find that Medigap insurers either won’t take you or will charge significantly more.
The lesson: your Open Enrollment window is the best deal you’ll ever get on Medigap. Protecting that window should be part of your retirement planning before you turn 65, not an afterthought.
How Medigap Eligibility and Cost Compare Across Situations
To make this concrete, here’s how eligibility and your likely cost outcome break down depending on when and how you’re applying:
| Situation | Guaranteed Issue? | Medical Underwriting? | Typical Monthly Premium (Plan G, age 65) |
|---|---|---|---|
| Within 6-month Open Enrollment window at Part B start | Yes | No | $100-$200 depending on state and insurer |
| Triggered guaranteed issue event (within 63 days) | Yes | No | $100-$200 (same as Open Enrollment) |
| Applying outside Open Enrollment, no triggering event, good health | No | Yes — likely approved | $100-$200 or somewhat higher depending on state |
| Applying outside Open Enrollment, no triggering event, significant health conditions | No | Yes — may be denied or rated up | Varies widely or may not be available |
| Enrolled in Medicare Advantage (past trial period) | No (unless qualifying event) | Yes in most states | Varies — potential denial |
A few states — including Connecticut, Maine, Massachusetts, New York, and Washington — have community rating laws or year-round open enrollment for Medigap. If you live in one of those states, you have more flexibility than the federal baseline provides. New York, for example, lets you buy or switch Medigap plans at any time without medical underwriting. That’s a significant advantage if you missed your initial window.
A Note on Low-Income Programs That People Confuse With Medigap
There are Medicare programs that do have income limits — they’re just not Medigap. I want to mention them because I regularly see people conflate these programs, and it leads to confusion about what they’re eligible for.
Medicare Savings Programs (MSPs) help low-income Medicare beneficiaries pay for Part B premiums, Part A premiums if applicable, and sometimes cost-sharing. There are four levels — Qualified Medicare Beneficiary (QMB), Specified Low-Income Medicare Beneficiary (SLMB), Qualifying Individual (QI), and Qualified Disabled and Working Individual (QDWI) — each with different income and asset thresholds. These are administered by state Medicaid agencies.
Extra Help (Low Income Subsidy) is an income-based program for Part D prescription drug costs. Not related to Medigap.
Neither of these is Medigap. Medigap is a private insurance product with no income component whatsoever. If someone tells you there are income limits for Medigap, they’re either misinformed or they’re mixing up these programs.
Bottom Line
There are no income limits for Medicare supplement eligibility — anyone enrolled in Medicare Parts A and B can apply for a Medigap plan. The real gatekeeping mechanism is timing: your six-month Open Enrollment window when you first enroll in Part B is the only time you’re fully protected from medical underwriting in most states, and protecting that window should be a priority before you turn 65. If you’re in a state without year-round guaranteed issue protections, treat that enrollment window like the single most important Medicare decision you’ll make.
Frequently Asked Questions
Can a Medigap insurer charge me more because of my income?
No. Medigap premiums are set based on factors like your age, where you live, your gender (in some states), and whether you smoke. Income plays no part. A retired doctor and a retired teacher with identical health histories and the same birthday in the same state will pay the same Medigap premium.
I’m on Medicaid in addition to Medicare. Can I still get a Medigap plan?
Technically yes, but it usually doesn’t make sense. If you’re on full Medicaid, Medicaid is already covering most of what Medigap would cover. You’d be paying premiums for redundant coverage. The one nuance: if your Medicaid eligibility is temporary or income-dependent and could change, it’s worth talking through with a Medicare counselor before dismissing Medigap entirely.
What happens if I was denied Medigap coverage due to health issues? Are there any options?
Your best option is to check whether you live in a state with guaranteed issue protections beyond the federal baseline. New York and Connecticut, for example, don’t allow underwriting at any time. Outside of those states, your alternatives are limited: you could consider a Medicare Advantage plan (which cannot deny you for health reasons), or watch for a qualifying event that would trigger guaranteed issue rights. There’s no federal fallback that forces insurers to sell you Medigap year-round in most states.
I’m 70 and just enrolling in Part B for the first time after losing employer coverage. Do I still get the Open Enrollment window?
Yes. Your Medigap Open Enrollment window is tied to when you first enroll in Part B, not your age. A 70-year-old who’s just signing up for Part B after losing creditable employer coverage gets the same six-month guaranteed issue window as someone enrolling at 65. Your premiums will be higher because you’re older, but your right to enroll without medical underwriting is intact.
