Retirement Age Calculator

What does a full retirement age calculator tell you?

A full retirement age calculator takes your date of birth and returns the age at which Social Security pays your full benefit, in years and months, with the calendar date you reach it. This page puts the other statutory milestones on the same timeline, from catch-up contributions at 50 to the year required minimum distributions begin.

Along the way are the first month you can claim Social Security at 62, the last month that earns delayed credits at 70, Medicare at 65 with its enrollment window, penalty-free withdrawals at 59½ and the rule of 55. Every age on the page is a rule from the Social Security Act, the Internal Revenue Code or the SECURE 2.0 Act, read from the site’s dataset for the year shown. None of it is a forecast or a recommendation; the financial question of when you can afford to retire belongs to the early retirement calculator.

What is the Social Security full retirement age by birth year?

Full retirement age (FRA) is when you receive 100% of your Primary Insurance Amount. The 1983 amendments (42 U.S.C. §416(l)) raised it from 65 in two steps: two months a year from 65 and 2 months (1938) to 65 and 10 months (1942); 66 for 1943–1954; then two months a year again to 67 for 1960 or later.

The Social Security Administration treats a person born on 1 January as having reached each age in the previous year, so a 1 January 1960 birth uses the 1959 rules: an FRA of 66 and 10 months. The same day-1 rule picks the delayed-credit rate for people born on 1 January 1943. The IRS does not use this rule; it reads the calendar year of birth.

How much do you lose by claiming at 62, or gain by waiting to 70?

You may claim retirement benefits from 62, but each month before FRA cuts the benefit by 5/9 of 1% for the first 36 months and 5/12 of 1% beyond that, for life. With an FRA of 67 that is 60 months early and a 30% cut, so you keep 70% of your PIA.

With an FRA of 66 it is 48 months and a 25% cut (75% of PIA); with 66 and 8 months, 56 months and a 28.33% cut (71.67%).

Each month you wait after FRA adds 2/3 of 1% — 8% a year — until 70, when credits stop. An FRA of 67 gives 36 months of credits and 124% of the PIA at 70; an FRA of 66 gives 48 months and 132%; 66 and 8 months gives 40 months and 126.67%. There is no reason, on the benefit alone, to wait past 70. The Social Security benefits calculator turns these percentages into dollars from your earnings.

When does Medicare start, and how long is the enrollment window?

Medicare eligibility stays at 65 whatever your Social Security full retirement age. Coverage can begin on the first day of the month you turn 65, or the first day of the previous month if your birthday is on the 1st.

Your initial enrollment period runs seven months: the three months before your birthday month, that month, and the three months after.

Missing the window without creditable employer coverage adds a permanent Part B late-enrollment penalty of 10% of the standard premium for every full 12 months you could have been enrolled but were not. If you or your spouse are still working for an employer with 20 or more employees and you are covered by that group plan, you can delay Part B without penalty and enroll in a special enrollment period when that coverage ends.

When can you withdraw from a 401(k) or IRA without the 10% penalty?

Distributions from traditional IRAs, 401(k)s and the earnings in a Roth IRA before age 59½ generally owe a 10% additional tax on top of income tax (IRC §72(t)). The page counts 59½ as exactly 59 years and 6 months from your birth date.

Exceptions include disability, certain medical costs, substantially equal periodic payments and, for workplace plans only, the rule of 55. Under IRC §72(t)(2)(A)(v), if you leave an employer in or after the calendar year you turn 55 (50 for qualified public-safety employees), distributions from that employer’s 401(k) or 403(b) are free of the 10% tax. It does not cover IRAs or plans from earlier employers, so the page shows the rule as a calendar year, not a birthday.

From the year you turn 50 you can add a catch-up contribution on top of the regular limit — the IRS amounts for the year are shown on the page — and in the years you turn 60 to 63 the workplace catch-up rises under SECURE 2.0 §109, dropping back at 64.

What is the RMD age under SECURE 2.0?

Required minimum distributions from pre-tax accounts begin at 73 for people born from 1951 to 1959 and at 75 for people born in 1960 or later (SECURE 2.0 Act §107). People born in 1950 or earlier already started at 72, or at 70½ if born before 1 July 1949.

The first distribution is for the year you reach the age and may be delayed until 1 April of the following year; every later one is due by 31 December.

Taking too little carries a 25% excise tax on the shortfall, reduced to 10% if it is corrected within the correction window (SECURE 2.0 §302). Roth IRAs have no lifetime RMDs, and since 2024 neither do Roth 401(k) accounts. The required minimum distribution calculator works out the amount from your balance and the IRS Uniform Lifetime Table.