Retirement Countdown
Count down to your planned retirement date in years, months and days, with progress so far and your US Social Security full retirement age.
For reference, the US Social Security full retirement age for this birth date is 67. Pension and employer plans set their own ages.
Updated Formula covered by automated tests
Enter your date of birth and the age at which you plan to stop working, and the countdown shows the exact date you reach that age, the years, months and days left until then, the total number of days, and how far along you are on the road from birth to that birthday. Below the inputs it also shows the US Social Security full retirement age that applies to your birth date, for reference.
A concrete date tends to sharpen planning. It tells you how many paychecks remain for maxing out retirement contributions, when to start comparing Medicare options (eligibility generally begins at 65), when an employer pension’s vesting or early-retirement window opens, and how much runway is left for paying off a mortgage before income drops.
The formula
- A
- Target retirement age in whole years
- extra months
- Additional months for ages such as 66 and 6 months; the widget uses whole years
- N(date)
- Serial day number of a date, used to count days exactly across leap years
- Progress
- Share of the time from birth to the retirement birthday that has already passed
Adding calendar months to the birth date, rather than multiplying years by 365.25, lands the retirement date on the actual birthday. The old 365.25-day shortcut can drift by a day, and dividing the remainder by an average month of 30.44 days gives month-and-day counts that do not match a calendar. Someone born on February 29 is treated as reaching the age on February 28 when the target year is not a leap year.
The US full retirement age comes from the Social Security Amendments of 1983, which phased it up from 65: it is 66 for people born 1943 to 1954, rises by two months per birth year from 1955, and is 67 for anyone born in 1960 or later. Social Security treats a person born on January 1 as if born in the previous year, which the reference note applies.
Worked example
Dana was born on June 15, 1985. Her full retirement age for Social Security is 67, and on October 18, 2026 she wants to know how long she has until then.
- 1 Retirement date: June 15, 1985 + 67 years = June 15, 2052.
- 2 Whole months from today: 12 × (2052 − 2026) + (6 − 10) = 308, but October 18 + 308 months is June 18, 2052, past the target, so 307 months = 25 years and 7 months, reaching May 18, 2052.
- 3 Remaining days from May 18 to June 15, 2052: 13 + 15 = 28 days.
- 4 Days left in total: 9,372. Days lived so far: 15,100 out of 24,472 from birth to her 67th birthday.
- 5 Progress: 15,100 ÷ 24,472 = 0.617, or 61.7%.
Result: Dana reaches 67 on Saturday, June 15, 2052: 25 years, 7 months and 28 days (9,372 days) from October 18, 2026. She is 41 and 61.7% of the way from birth to that birthday.
Before you rely on the result
- Retirement ages for pensions, other countries’ state pensions and employer plans differ from US Social Security and can change with new legislation; check your plan documents.
- This is general information, not financial advice. Claiming decisions affect lifetime income, so consider speaking with a qualified financial professional.
Frequently asked questions
What is the official retirement age in the US?
There is no single one. For Social Security, full retirement age is 67 for anyone born in 1960 or later and between 66 and 67 for earlier years. You can claim reduced benefits from 62 (70% of the full amount when the full age is 67), and benefits grow by 8% a year for each year you wait past full age, up to 70. Medicare eligibility generally starts at 65 regardless.
Does the countdown tell me when I can afford to retire?
No. It counts time, not money. Whether savings, pensions and Social Security will cover your spending depends on many factors; a fee-only financial planner or the SSA’s own benefit estimates at ssa.gov are the right places for that question.
Why is the progress bar measured from birth and not from my first job?
Career start dates vary and are not entered here, so the bar shows the one span the tool knows precisely: from your birth date to the birthday you picked. Read it as "share of the way to that age", not as a share of a working career.
I was born on January 1. Why does the reference age look a year early?
Social Security considers people to attain an age on the day before their birthday, so someone born January 1 is treated as born in the prior year. A person born January 1, 1960 therefore gets the 1959 rule, 66 and 10 months.