Retirement Events Timeline

The retirement countdown, and why the order matters

Retiring is not one decision but a couple of dozen, several of which have fixed deadlines set by Medicare, Social Security, or your employer's plan. Miss those windows and the penalties are permanent rather than inconvenient. The checklist above starts from the standard sequence; the notes below explain where the hard dates come from.

A year out: decisions, not paperwork

Request a pension estimate if you have one, build the budget you actually expect to live on, and settle your Social Security claiming strategy — that last one changes the income all the others assume. This is also the point to review your asset allocation, because the first years of retirement are when a bad sequence of returns does the most lasting damage.

Six months out: stop HSA contributions

When you enroll in Medicare after 65, Part A coverage is backdated up to six months. Any HSA contribution made during that retroactive window becomes an excess contribution subject to penalty, so contributions need to stop six months before Medicare begins. It is the single most commonly missed item on the list.

Three months out: Medicare

The initial enrollment period runs seven months — the three months before the month you turn 65, that month, and the three after — but only signing up in the first three gets coverage started without a gap. Enrolling late without qualifying group coverage attaches a Part B penalty to your premium for life. If you are retiring before 65, this is instead the moment to price COBRA against a marketplace plan.

Two months out: Social Security and your employer

Applications are accepted up to four months ahead, and two to three months is the usual advice. Benefits are paid the month after the month they are due, so the first deposit lands later than most people expect — worth knowing before you plan the first month's cash flow. Formal notice to your employer usually belongs here too, along with choosing Medigap plus Part D or a Medicare Advantage plan.

After the date: withdrawals, taxes, and the two-year clock

Set up the withdrawals that replace your paycheck, decide whether to roll the 401(k) to an IRA or leave it, and arrange for federal tax — either quarterly estimates or withholding taken straight from IRA distributions, which the IRS treats as paid evenly through the year. Then watch your income against the Medicare IRMAA brackets, because this year's total sets your premiums two years from now. These early low-income years are also the best window for Roth conversions, before required minimum distributions begin and take the choice away.

Frequently asked questions

When should I sign up for Medicare?

Your initial enrollment period runs seven months — the three months before the month you turn 65, that month, and the three months after. Signing up in the three months before 65 is what gets coverage started on time. If you are still covered by a large employer’s group plan you may delay without penalty, but missing the window without that coverage brings a permanent Part B surcharge.

How far ahead should I apply for Social Security?

Applications are accepted up to four months before you want benefits to begin, and applying two to three months ahead is the usual advice. Benefits are paid the month after the month they are due, so the first payment always arrives later than people expect.

Why stop HSA contributions before retiring?

Medicare Part A coverage is backdated up to six months when you enroll after 65. Any HSA contribution made during that retroactive window is an excess contribution subject to penalty, so contributions normally need to stop six months before Medicare enrollment.

What happens to my 401(k) when I retire?

You can generally leave it in the plan, roll it to an IRA, or withdraw from it. Rolling to an IRA widens your investment choices and makes RMD aggregation simpler later; leaving it in the plan preserves the rule that allows penalty-free withdrawals from your final employer’s plan if you separate from service in or after the year you turn 55.

When do I need to start paying estimated taxes?

As soon as income arrives without withholding — which for most retirees is the first year of IRA withdrawals or self-employment income. The alternative that avoids quarterly filing is asking your IRA custodian to withhold federal tax directly from distributions, which the IRS treats as paid evenly across the year.