Medicare provides both free and cost-effective health insurance coverage for eligible older adults who are 65 years of age or older. Social Security retirement benefits act as a small pension, providing monthly income to those eligible as early as age 62. Even if you are eligible to start receiving benefits, you do not have to start taking them. In some cases, it may be better to delay or to start taking benefits from one program but not the other.

When You’re Eligible for Medicare

Older people who are U.S. citizens or permanent legal residents can qualify for traditional Medicare coverage as early as age 65. You might also be eligible for Medicare if you are under age 65 and meet one of the following conditions:

You are on dialysis or you’ve had a kidney transplant because of end-stage renal diseaseYou have been entitled to Social Security or Railroad Retirement Board disability benefits for 24 monthsYou have Lou Gehrig’s disease.

You are automatically enrolled in Medicare Part A if you qualify for Medicare and you’ve received Social Security or Railroad Retirement Board benefits for at least four months before you turn 65. You can then choose to enroll in other parts of the program or to delay enrollment. If you are over 65 and do not meet any of the above criteria, you still may be eligible to purchase coverage through Medicare Part A. If you are unsure whether you are eligible, you can check using the Medicare Eligibility & Premium Calculator.

When You’re Eligible for Social Security

Today, older adults become eligible for full Social Security retirement benefits at age 66 or 67 depending on their birth year and whether they or their spouse have met the work credit requirement. For anyone born in 1929 or later, the minimum work credit requirement for Social Security benefits is 40 credits or 10 years of work. The year you can start taking full Social Security benefits is known as your full retirement age or normal retirement age. If you were born on Jan. 1 of any year, refer to the previous year when calculating your full retirement age. You can also choose to delay your Social Security benefit past full retirement age until age 70. This will often make you eligible for delayed retirement credits, which increase your monthly benefit for the remainder of your life. If you are eligible for Social Security, your family members may also be eligible to receive some benefit if they are a:

Spouse or former spouse age 62 or older Spouse younger than 62 if taking care of a child who is younger than age 16 or with disabilities Child up to age 18, or up to 19 if they’re a full-time student and haven’t graduated from high school A child of any age who became disabled before age 22

Family members can only receive these payments if you are eligible and have already filed for retirement benefits. Deciding when and how to file for Social Security benefits (whether they are your own or your spousal benefit) should be a strategic piece of a prepared older person’s retirement planning.

Taking Medicare But Not Social Security

It is possible to enroll in Medicare coverage but delay taking your Social Security retirement benefits. For many workers, this strategy might be financially advantageous. For most older people, it is a good idea to enroll in all parts of Medicare coverage they plan to use as soon as they are eligible at age 65. If you delay enrolling, Medicare Part D may become more expensive. If you delay signing up for Part B, you may also experience a gap in your coverage or have to pay a late enrollment penalty. However, if you can afford to, it is often a smart financial decision to delay receiving Social Security benefits until at least your full retirement age in order to increase the benefit you receive. This may mean that there are several years during which you are enrolled and covered by Medicare but not yet receiving your monthly Social Security benefit.