Filing for Social Security at 62 when your full retirement age is 67 cuts the monthly benefit by 30%, and the cut doesn’t expire when you turn 67. Waiting until 70 runs the other way and pays 124% of the full amount. On a benefit worth $2,000 a month at 67, those three choices come to $1,400, $2,000 and $2,480. Every one of those percentages comes out of two fixed fractions that Social Security applies month by month.
How the reduction at 62 is calculated
Full retirement age depends on your year of birth. Anyone born on January 2, 1960 or later has a full retirement age of 67, according to Social Security’s full retirement age chart. Birth years from 1955 through 1959 land between 66 and 2 months and 66 and 10 months, so the arithmetic below shifts for them.
The reduction is counted in months, not years. Social Security’s operating manual on reduced retirement benefits sets it at 5/9 of 1% for each of the first 36 months before full retirement age, and 5/12 of 1% for every month beyond those 36.
Claiming the month you turn 62 with a full retirement age of 67 gives you 60 reduction months. The first 36 cost 36 times 5/9 of 1%, which is 20%. The remaining 24 cost 24 times 5/12 of 1%, which is 10%. Together that is a 30% cut, leaving 70% of the full benefit. Someone who files at 64 instead has only 36 reduction months and keeps 80%.
The steeper fraction applies to the 36 months closest to full retirement age, so moving a filing date from 67 back to 64 costs more per month than moving it from 64 back to 62. The first years you give up are the expensive ones.
What does a 30% cut look like in dollars?
The worker below is invented, and nothing about the record changes between the rows:
- Born in 1962, so full retirement age is 67.
- A full benefit of $2,000 a month at 67, the figure a Social Security statement quotes.
- No cost of living adjustments and no taxes applied, so the comparison stays clean.
At 62 the check is 70% of $2,000, or $1,400. That is $600 a month less, $7,200 a year less, and it stays that way for the rest of the worker’s life. The table below runs the same calculation at every age in between.
Credits for waiting past 67
Past full retirement age the arithmetic flips to delayed retirement credits. For anyone born in 1943 or later the credit is 2/3 of 1% a month, or 8% a year, and Social Security’s chart of delayed retirement credit rates shows the same rate for every birth year after that. Credits stop accruing in the month before you turn 70.
Three years of credits from 67 to 70 is 36 months times 2/3 of 1%, or 24%. The benefit becomes 124% of the full amount, $2,480 on a $2,000 base. Against the $1,400 check at 62 that is $1,080 more a month, about 77% higher. Filing at 71 adds nothing, so the last month that earns a credit is the one before your seventieth birthday.
Where the two paths cross
A smaller check that starts early still beats a larger check that hasn’t started. The 62 filer banks five years of payments before the 67 filer sees a dollar, and the crossing point is the age at which the larger check finally makes up that head start.
- By age 67 the early filer has collected 60 checks of $1,400, or $84,000.
- From 67 onward the later filer is ahead by $600 every month.
- $84,000 divided by $600 is 140 months, which is 11 years and 8 months past 67, or age 78 and 8 months.
Run the same steps against age 70 and the early filer has $134,400 banked by then, while the gap is $1,080 a month. That takes about 124 months to close, landing a little past age 80 and 4 months. Comparing 67 with 70 alone gives $72,000 banked against a $480 monthly gap, or 150 months, which puts the crossing at 82 and a half.
Two forces move those ages. Cost of living increases pull the crossing point earlier, because the same percentage raise is worth more dollars on the bigger check. Earning a return on the early payments pushes it later, since money collected at 62 has eight extra years to grow before the age 70 filer starts.
What if you keep working after you file?
Collecting before full retirement age while still earning a paycheck triggers the retirement earnings test. For 2026 the exempt amount chart sets the annual limit at $24,480 for anyone under full retirement age for the whole year, with $1 of benefits withheld for every $2 of earnings above it. In the calendar year you reach full retirement age the limit jumps to $65,160, the withholding eases to $1 for every $3, and only earnings before your birthday month count. From full retirement age on, the test disappears entirely.
Put $40,000 of wages next to that $1,400 benefit and the year looks like this:
- Earnings above the limit: $40,000 minus $24,480, or $15,520.
- Benefits withheld: half of $15,520, or $7,760.
- Benefits actually paid: $16,800 for the year minus $7,760, or $9,040.
More than five months of checks vanish from that year. The test counts wages and net self-employment income only, so a pension, investment income or a withdrawal from a retirement account doesn’t add to the total.
Withheld checks aren’t gone for good
When you reach full retirement age, Social Security recalculates. Months in which benefits were withheld in whole or in part become crediting months under the rules for adjusting the reduction factor, those months come out of the original reduction, and the monthly amount rises for the rest of your life. The adjustment happens automatically.
The money comes back slowly, through a bigger monthly check. A worker who had six months of benefits held back at 62 gets a permanently higher check from 67 forward, and has to live long enough to collect the difference. The 30% reduction itself never comes back, no matter how much you earn.
How to run this on your own record
- Look up your full retirement age by birth year, then count the months between it and the age you plan to file.
- Apply 5/9 of 1% to the first 36 of those months and 5/12 of 1% to any beyond 36, then subtract the total from 100%.
- For months after full retirement age, add 2/3 of 1% each, stopping at age 70.
- Multiply that percentage by the benefit estimate on your Social Security statement, which is quoted at full retirement age.
- If you will be working, subtract the earnings test withholding for every year you are under full retirement age.
- Divide what you would bank by filing early by the monthly gap to get your own crossing age.
If you’re married
The break-even ages above assume one person. If you’re the higher earner in a couple, the check you lock in also sets the survivor benefit your spouse would collect after you die. Filing at 62 shrinks that survivor check, and waiting to 70 raises it, so the longer-lived of the two of you is the one whose life expectancy matters. Social Security’s survivor benefits pages cover who qualifies and what a widow or widower could get.
Related reading
- Social Security COLA for 2027 Is 3.6%, or $72 More on a $2,000 Check
- Can You Contribute to a Roth IRA and a 401(k) in the Same Year?
The earnings test figures above are the 2026 limits, and Social Security resets them each January. Your own full retirement age estimate is in your my Social Security account at ssa.gov; use that number, not the $2,000 example, before you pick a filing month.
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