Working Past 65 in Houston: When You Can Delay Medicare Part B in 2026

You’re 65 — or close — and you’re still working. Maybe at the Texas Medical Center, an energy company downtown, or your own small business out in Katy. Everyone says “sign up for Medicare,” but you already have a health plan through work, you like your doctors, and the last thing you want is to start paying a new monthly premium for coverage you may not even need yet. The mail from Social Security and the well-meaning advice from co-workers point in different directions, and nobody seems to give you a straight answer.

Here is the straight answer, the one we give Houston workers every week: in many cases you can delay Medicare Part B past 65 with no penalty — but only if your situation fits a specific set of rules, and the single most important number is how many employees your (or your spouse’s) employer has. Get that wrong and you can owe a lifelong penalty, lose a tax break on your Health Savings Account, or be left with claims nobody pays. This guide from Wise Insurance Agency walks through exactly when delaying is safe and when it is a costly mistake. If you would rather talk it through with a Texas-licensed agent, call 832-743-1318 or book an appointment — we will look at your specific employer plan with you.

Still working at 65 in Houston — what actually changes

Turning 65 does not force you to drop your job’s health plan, and it does not force you onto Medicare. Plenty of Houstonians keep working — nurses and researchers at the Texas Medical Center, engineers at energy companies, teachers and staff in Houston-area school districts, and owners of small businesses from the Heights to Pearland. If you are one of them, the real question is not “do I have to take Medicare?” It is “which parts make sense for me right now, and which can wait?”

Medicare has separate parts, and they do not all have to start at the same time. Part A is hospital insurance and is premium-free for most workers. Part B is medical insurance — doctor visits, outpatient care, lab work — and it carries a monthly premium, $202.90 in 2026 for most people, per CMS. Because Part B costs money each month, it is the part most working people want to delay if they safely can. The rules let some people do exactly that, with no penalty, for as long as they keep qualifying employer coverage.

If you are not still working — if you have already retired, or you are on COBRA or retiree benefits — the calculation is different, and you generally should not delay. We cover that situation in our companion guide, Is Medicare mandatory at 65? This article is for people who are genuinely still on the job with active coverage.

The first thing to settle is whether your employer coverage even lets you delay. That comes down to one number.

The 20-employee rule: the line that decides if you can delay

This is the rule that matters most, so read it slowly. If you have group health coverage based on current active employment — yours or your spouse’s — and that employer has 20 or more employees, then your group plan is the primary payer and Medicare would be secondary. In that situation you can delay Medicare Part B with no late-enrollment penalty for as long as you keep that coverage.

The phrase “current active employment’ is doing heavy lifting. The coverage has to come from a job someone is actively working — you or your spouse. A pension-based retiree plan does not count. COBRA does not count. Only a plan tied to a job that is still being worked qualifies.

Two pieces both have to be true:

• The coverage is current-employment coverage — tied to a job you or your spouse are actively working right now.
• The employer has 20 or more employees — which makes the group plan primary and Medicare secondary for people 65 and older.

When both are true, delaying Part B is safe. You keep your work plan, you skip the $202.90 monthly Part B premium, and when the job eventually ends a Special Enrollment Period opens so you can pick up Part B with no penalty. Many large Houston employers — hospital systems, universities, energy companies, school districts — clear the 20-employee bar easily.

One detail Houston workers ask about often: the rule looks at the employer’s total employee count, not how many people are on the health plan. A company with 35 workers where only 18 enrolled in the group plan still counts as a 20-plus employer. When in doubt, ask the benefits administrator to confirm the count in writing.

Takeaway: if both halves of the rule are true, you can delay Part B with confidence. If either half is in doubt, do not delay until you have confirmed the facts — or talked them through with a licensed agent.

Working for a small employer: why delaying Part B can backfire

The picture flips at a small employer. If the company has fewer than 20 employees, Medicare is generally the primary payer once you turn 65, and the small group plan pays second. That has a sharp consequence: if you delay Part B at a small employer, the group plan may process your claims as though Medicare were already paying its share — even though you have not enrolled. The result can be large unpaid balances that land on you.

This catches Houston small-business owners and their employees more than any other group. The owner of a six-person accounting firm in Sugar Land, a nine-person dental practice in the Heights, a small family restaurant — these employers are below the 20-employee line. If you are 65 and working at one of them, delaying Part B is usually the wrong move.

There is an important exception inside this rule. Some small employers join a multi-employer or union health plan. A few of those arrangements can still be primary. This is exactly the kind of detail you do not want to guess at — confirm it with the benefits administrator before deciding.

Takeaway: small-employer workers should treat Part B as something to enroll in at 65, not delay. Confirm your employer’s size and how the plan coordinates before you assume you can wait. Our agents review employer health coverage alongside Medicare every week — call 832-743-1318 if you are unsure where your plan stands.

Should you take premium-free Part A at 65?

Part A — hospital insurance — is premium-free for people with at least 40 quarters (about 10 years) of Medicare-taxed work, per SSA. Because there is no monthly premium, enrolling in Part A at 65 seems like an easy yes. For many working Houstonians it is. Part A can act as a small secondary layer behind your employer plan for inpatient hospital stays, and it costs nothing in premium.

But “premium-free” does not mean “consequence-free.” There is one group of people for whom enrolling in Part A at 65 is a real decision, not an automatic one: anyone contributing to a Health Savings Account. Enrolling in any part of Medicare, including premium-free Part A, ends your eligibility to contribute to an HSA. That is an IRS rule, and it is the single most common trap we see among Houston workers who keep a high-deductible health plan at work.

So the Part A decision splits cleanly:

• No HSA contributions? Enrolling in premium-free Part A at 65 is usually fine, and many people do.
• Still contributing to an HSA — or want to? Do not enroll in Part A yet. Coordinate the timing carefully, because of the backdating rule explained in the next section.

Takeaway: premium-free Part A is a benefit for most workers, but if you fund an HSA, Part A is a decision to plan — not a box to check by reflex.

The HSA trap: the 6-month lookback that catches savers

This section deserves its own heading because it surprises careful, well-organized people — the kind who fund an HSA every year precisely because they plan ahead. The trap is built into how Medicare Part A starts when you enroll after 65.

Here is the mechanism. When you enroll in premium-free Part A after 65 — or when you claim Social Security after 65, which triggers Part A automatically — Medicare does not start Part A on the day you apply. It backdates Part A coverage up to 6 months (and never earlier than the first day of your 65th-birthday month). You may think your Medicare started in, say, August, when in fact it is treated as having started the previous February.

That backdating collides with HSA rules. The IRS says you cannot contribute to an HSA for any month you are enrolled in Medicare. So every HSA contribution you made during those retroactively-covered months becomes an excess contribution. Excess contributions that are not removed are hit with a 6% IRS excise tax — charged every year until the excess is corrected. Per IRS Publication 969, this is the rule that governs HSAs and Medicare overlap.

The practical rule is simple, and it is the one we give every HSA saver: stop HSA contributions at least 6 months before you apply for Medicare or Social Security. If you plan to retire and enroll at, say, 66, your last HSA contribution should land at least six months before that application date. If you are turning 65 and intend to keep working and keep funding the HSA, that is fine — just do not enroll in Part A, and do not claim Social Security, while you are still contributing.

This is genuinely a tax-planning question as much as an insurance one. Loop in your CPA on the HSA contribution math; loop in a Medicare-licensed agent on the enrollment timing. The two decisions have to line up.

Takeaway: the HSA trap is avoidable with one calendar entry — the date you stop contributing. Set it six months ahead of any Medicare or Social Security application.

The 8-month Special Enrollment Period — how the clock works

The reason delaying Part B is safe for people with qualifying employer coverage is the Special Enrollment Period, or SEP. When you finally do need Part B, the SEP lets you enroll with no late penalty — as long as you act inside the window.

The SEP gives you 8 months to enroll in Part B. The clock starts on the earlier of two events: the month your employment ends, or the month your group health coverage ends — whichever happens first. That “whichever first’ detail matters. If your job ends in May but your employer keeps your health coverage through June as a courtesy, the SEP clock still starts in May, because employment ending is the earlier event.

You can also enroll while you are still working, at any point before the job ends, without penalty. The SEP simply guarantees a penalty-free runway after the coverage stops.

To enroll through the SEP you will give the Social Security Administration proof of your employer coverage. That usually means a CMS form (often called the Request for Employment Information) that your employer’s benefits administrator signs, confirming you had group coverage based on current active employment. Start gathering that paperwork before your last day, not after.

Takeaway: the SEP is a generous 8-month runway, but it is a deadline, not an open door. Mark the month your coverage ends and enroll before month eight closes.

Part D and creditable drug coverage when you delay

Part B is not the only piece you may want to delay. Part D is Medicare’s prescription drug coverage, and it has its own delay rule, separate from the Part B rules above.

You can delay Part D without a penalty if the drug coverage in your employer plan is creditable — meaning it is, on average, at least as good as standard Medicare Part D coverage. Most large-employer drug plans are creditable, but you should not assume. Each year, your benefits administrator is supposed to send a creditable-coverage notice stating whether the plan’s drug coverage is creditable or not.

Ask for that notice, read it, and keep it. If you later enroll in Part D, you may be asked to prove you had creditable coverage during the years you delayed. The notice is your proof. If your employer drug coverage is not creditable, delaying Part D can trigger a separate Part D late-enrollment penalty — so in that case you generally should not delay.

Takeaway: delaying Part D is safe only when your employer drug coverage is creditable — get the annual notice and keep it. Our team can review your Medicare plan options, including stand-alone Part D, when the time comes to enroll.

The Part B late-enrollment penalty — what delaying wrong costs

Everything above is about delaying Part B correctly. Here is what happens when someone delays without qualifying employer coverage — for example, a person on COBRA who assumed it counted, or a small-employer worker who thought the 20-employee rule did not matter.

The Part B late-enrollment penalty adds 10% to your Part B premium for each full 12-month period you could have had Part B but did not. And it is permanent — the penalty stays on your premium for as long as you have Part B. It is not a one-time fee; it is a lifelong surcharge.

Using the 2026 standard Part B premium of $202.90 per month, per CMS, here is what the penalty looks like:

The figures above use the 2026 standard premium for illustration; the penalty is recalculated against the standard premium each year, so the dollar amount moves with the premium. The point is the structure: a three-year mistake means paying roughly 30% more, every month, for the rest of your life. That is the cost of guessing wrong about whether you qualified to delay.

Takeaway: the penalty is the price of a wrong assumption. Confirm you qualify before you delay — the verification costs nothing; the penalty lasts forever.

Houston scenarios: TMC, energy, school districts, small business

The 20-employee line plays out differently across Houston’s major employers. Here are the situations we see most often.

Texas Medical Center and large hospital systems

A 66-year-old nurse still working at a Texas Medical Center hospital almost certainly has coverage from an employer well above 20 employees. Her group plan is primary; she can delay Part B with no penalty for as long as she keeps working. If she also funds an HSA through a high-deductible option, she should hold off on Part A and Social Security until she has planned the contribution stop date.

Energy companies downtown

A 67-year-old engineer at a downtown energy firm is in the same large-employer category. He can delay Part B safely. When a retirement package or a layoff eventually ends the job, his 8-month SEP starts that month — and he should enroll before it closes rather than leaning on any severance-related coverage, which is not current-employment coverage.

Houston-area school districts

School district employees are covered by large group plans well above the 20-employee threshold, so active district employees can generally delay Part B. The caution here is retirement: a district retiree health plan is not current-employment coverage. The day someone moves from active employee to retiree, the delay rules no longer apply — the SEP clock starts.

Small businesses across the metro

A 65-year-old part-owner of an eight-person logistics company near the Port, or an employee at a small Katy retail shop, faces the harder case. The employer is below 20 employees, Medicare is primary at 65, and delaying Part B usually means unpaid claims. For these Houstonians, enrolling in Part B on time is normally the right call.

Takeaway: large Houston employers usually let you delay; small ones usually do not. Your employer’s headcount — not your job title or industry — is the deciding fact.

When to call Wise Insurance Agency

Deciding whether to delay Part B is not a one-question decision. It is employer size, plus HSA timing, plus drug-coverage credit, plus the SEP calendar — four moving parts that have to line up. Here is how working with a Texas-licensed agent at Wise actually helps.

Six to twelve months before you turn 65. Bring your employer benefits summary and a note on whether you fund an HSA. We confirm whether your (or your spouse’s) employer clears the 20-employee line, whether the drug coverage is creditable, and whether premium-free Part A makes sense for you now or should wait.

When the job is ending. We map your 8-month Special Enrollment Period, help you gather the CMS employment-information form, and time your Part B start so there is no gap and no penalty. We then walk through whether Medicare Advantage or Original Medicare with a Medicare Supplement plan fits your doctors and prescriptions.

If your situation changes. A spouse retires, you move ZIP codes, you switch from full-time to part-time — each of these can change the answer. We adjust the plan with you. We are licensed across the full range of Medicare coverage in Texas, and there is no consumer fee for this guidance — agents are paid by the carriers.

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