Claiming Social Security at 65 locks in a permanently reduced monthly benefit, about 13.3 percent smaller than what you would receive by waiting until your full retirement age of 67. The reduction never goes away, and it becomes the base for every future cost-of-living adjustment. Age 65 does still matter for one big reason: it is when Medicare eligibility begins. But on the Social Security side, filing at 65 is an early retirement election under federal rules.
Why 65 Is No Longer the Full Retirement Age
Congress raised the full retirement age years ago. For anyone born in 1960 or later, it now sits at 67.1Office of the Law Revision Counsel. 42 USC 416 – Additional Definitions Many workplace pension plans and private retirement accounts still treat 65 as the default retirement age, which fuels the confusion. Social Security does not. If you file at 65 with a full retirement age of 67, the reduction is automatic and permanent. There is no way to upgrade to the full amount later just by reaching 67.
How Much Your Benefit Drops
The Social Security Administration cuts your monthly payment by five-ninths of one percent for each month you claim before full retirement age, up to 36 months early.2Social Security Administration. Early or Late Retirement Age 65 is exactly 24 months before 67, so all 24 months fall inside that formula. The result is a permanent cut of roughly 13.3 percent.
In dollars: a worker whose benefit at full retirement age would be $2,000 per month drops to about $1,733 by claiming at 65. That reduced amount becomes the base for every future cost-of-living adjustment. The 2026 COLA is 2.8 percent, applied to whatever your benefit happens to be.3Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet A lower starting point produces smaller dollar increases each year, and the gap compounds.
What You Give Up by Not Waiting
Every month you postpone benefits past full retirement age earns a delayed retirement credit of two-thirds of one percent, which works out to 8 percent per year.4Social Security Administration. 20 CFR 404.313 – What Are Delayed Retirement Credits and How Do They Increase My Old-Age Benefit Amount Credits stop building at 70, so the maximum boost for someone with a full retirement age of 67 is 24 percent above the full benefit.
The same worker who would get $2,000 at 67 receives about $1,733 at 65 and about $2,480 at 70. That is a $747 monthly swing between the earliest common claim age and the latest useful one. Whether the tradeoff makes sense depends on your health, other income, and whether you can cover expenses without the check in the meantime.
Working While Collecting
If you claim at 65 and keep working, part of your benefit may be temporarily withheld. For 2026, if earned income exceeds $24,480, Social Security withholds $1 for every $2 above that threshold.5Social Security Administration. Receiving Benefits While Working Only wages and self-employment income count. Investment returns, pensions, and annuities do not trigger the test.
In the calendar year you reach full retirement age, a more generous rule kicks in. The 2026 threshold jumps to $65,160, withholding drops to $1 for every $3 above the limit, and only earnings in the months before you hit full retirement age count. Once you actually reach full retirement age, the earnings test disappears.
Withheld benefits are not lost. When you reach full retirement age, the Social Security Administration recalculates your monthly payment to credit you for the months benefits were withheld, adjusting your reduction factor upward.6Social Security Administration. Program Explainer: Retirement Earnings Test The earnings test is more of a deferral than a true loss, though it can still create cash flow problems if you were counting on the monthly check alongside a full salary.
Taxes on Your Benefit
Social Security benefits can be taxable. The trigger is your combined income, meaning your adjusted gross income plus nontaxable interest plus half of your benefits. The thresholds are set by federal statute and have never been adjusted for inflation, so more retirees cross them every year.7Office of the Law Revision Counsel. 26 USC 86 – Social Security and Tier 1 Railroad Retirement Benefits
For single filers, combined income between $25,000 and $34,000 makes up to 50 percent of benefits taxable; above $34,000, up to 85 percent is taxable. For married couples filing jointly, the 50 percent band runs from $32,000 to $44,000, and above $44,000, up to 85 percent is taxable.
The 85 percent figure does not mean 85 percent of the benefit is taken. It means 85 percent of the benefit amount is added to your taxable income and taxed at your regular rate. Still, someone earning $50,000 at a job while collecting $18,000 a year in benefits can owe several thousand dollars in federal tax they had not budgeted for.
Medicare Starts at 65 Either Way
Turning 65 makes you eligible for Medicare regardless of when you start Social Security. If you are already receiving Social Security at that point, enrollment in Medicare Part A and Part B is typically automatic.8Centers for Medicare & Medicaid Services. Original Medicare (Part A and B) Eligibility and Enrollment Part A coverage begins the month you turn 65, or the month before if your birthday falls on the first.9Medicare. When Does Medicare Coverage Start
The standard Part B premium for 2026 is $202.90 per month, deducted directly from your Social Security check.10Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles If you are not yet receiving Social Security when you turn 65, you have to sign up for Medicare manually during the initial enrollment period, which runs from three months before your birth month through three months after.
Higher earners pay an Income-Related Monthly Adjustment Amount, or IRMAA, on top of the standard premium. The Social Security Administration uses your tax return from two years earlier to set the bracket, so your 2026 premium reflects 2024 income.11Medicare. Medicare Costs The surcharge starts above $109,000 for individuals and $218,000 for joint filers, and it hits hardest for someone who retires mid-career, because the two-year lookback captures peak earning years rather than the new retirement income. You can appeal if your income has dropped because of a life-changing event like retirement.
Effect on a Spouse or Survivor
The decision to claim at 65 reaches beyond your own check. A spouse claiming spousal benefits before their own full retirement age also takes a reduced amount. The maximum spousal benefit is 50 percent of the worker’s full retirement age benefit, but claiming at 62 cuts that by about 35 percent for someone with a full retirement age of 67.12Social Security Administration. Retirement Age and Benefit Reduction
Survivor benefits are the bigger issue for many households. When one spouse dies, the survivor can switch to the deceased’s benefit if it is higher. If the deceased claimed early, that survivor benefit is capped at the higher of what the deceased was actually receiving or 82.5 percent of their full retirement age benefit. Delaying your own claim produces a larger survivor benefit for your spouse later, which matters most when one spouse earned significantly more than the other.
How to File
The Social Security Administration recommends applying up to four months before the month you want benefits to begin.13Social Security Administration. Timing Your First Payment Your first payment arrives the month after the enrollment month you pick. Most claims are processed within about 14 days when benefits are due immediately.14Social Security Administration. Social Security Performance
You can file online, by phone, or at a local field office using Form SSA-1-BK, the Application for Retirement Insurance Benefits.15Social Security Administration. Application for Retirement Insurance Benefits Have your Social Security number, birth certificate, recent W-2 forms or self-employment tax returns, and direct deposit information ready. The form also asks about current and past marriages, and veterans should have discharge papers on hand so all applicable credits are counted.
One rule catches people off guard: if you apply at 65, you cannot receive retroactive payments for months before your application. Retroactive benefits are only available once you have reached full retirement age, and even then the lookback is capped at six months.16Social Security Administration. Delayed Retirement Credits At 65, benefits start no earlier than the month you apply.
If You Change Your Mind
Two paths exist for reversing course, and both come with conditions.
Within 12 months of your benefit approval, you can withdraw your application entirely. You have to repay every dollar you and your family received, including amounts withheld for Medicare premiums, taxes, and garnishments. Any medical expenses covered by Medicare Part A during that period must also be repaid to Medicare.17Social Security Administration. Cancel Your Benefits Application You can only do this once. After repayment, it is as though you never filed, and you can claim later at a higher amount.
Once you reach full retirement age, you can ask the Social Security Administration to suspend payments instead. While suspended, you earn delayed retirement credits of 8 percent per year, which raise your benefit when payments resume.18Social Security Administration. Suspending Your Retirement Benefit Payments Payments restart automatically at 70 if you do not act sooner. Suspension does not require repaying anything.
Suspension has family consequences. While your benefits are paused, anyone collecting spousal or dependent benefits on your record also stops receiving payments, though a divorced spouse can keep collecting during your suspension. You will also need to pay Medicare Part B premiums out of pocket, since they cannot be deducted from a suspended benefit.