The math
Social Security is designed so the claiming age barely matters.
Waiting from 62 to 70 raises the monthly check by 77%. That is a large and real number, and it is why the standard advice is to wait. What the standard advice leaves out is that the system was built to make the total roughly equal either way.
The rules, which are simpler than they look
You can claim from 62. Full retirement age is 67 for anyone born in 1960 or later. Claim before that and the benefit is permanently reduced by five ninths of one percent for each of the first 36 months, then five twelfths of one percent for every month beyond. Claim after and you earn a delayed retirement credit of 8 percent a year, stopping at 70.
Those percentages compound into a schedule most people have never seen laid out.
| Claim at | Benefit, as a share of the full amount |
|---|---|
| 62 | 70.0% |
| 63 | 75.0% |
| 64 | 80.0% |
| 65 | 86.7% |
| 66 | 93.3% |
| 67 | 100.0% |
| 68 | 108.0% |
| 69 | 116.0% |
| 70 | 124.0% |
Claiming at 62 costs 30% permanently. Waiting to 70 adds 24% permanently. The check at 70 is 1.77 times the check at 62, for the same work record.
Which is where the usual advice stops
A 77 percent larger payment, inflation-adjusted, guaranteed for life, is a genuinely extraordinary thing to be offered. Almost every article on this subject ends there, and tells you to wait.
But a larger check for fewer years is not obviously better than a smaller check for more years, and the people who designed the system knew that. Here is the Social Security Administration's own Office of the Chief Actuary, in a published research paper:
Because the early retirement reduction factors and delayed retirement credits are roughly actuarially fair, lifetime benefits are about the same for the average beneficiary regardless of claiming age.
That is the agency that writes the checks saying the choice is close to neutral. Not that delaying is wrong, but that the adjustment was calibrated to make the total roughly equal for someone with average life expectancy.
The break-even, and why it moves
| Comparison | Break-even age | At a 2% real discount rate |
|---|---|---|
| Claiming at 62 against 67 | 78 | 81 |
| Claiming at 62 against 70 | 80 | 82 |
| Claiming at 67 against 70 | 82 | 84 |
Claim at 62 rather than 67 and you are ahead until 78. Claim at 62 rather than 70 and you are ahead until 80. Wait to 70 rather than 67 and you do not catch up until 82.
The second column matters and is usually omitted. Money received at 63 can be spent, or invested, or simply means you sold fewer shares in a bad year. Discount the future at a modest 2 percent real and every break-even moves two to three years later.
How flat the curve actually is
This is the table that changed how we think about it. Cumulative benefits received, expressed as a multiple of one year at the full amount.
| By age | Claimed at 62 | At 67 | At 70 | Spread |
|---|---|---|---|---|
| 75 | 9.8 | 9.0 | 7.4 | 31.7% |
| 80 | 13.3 | 14.0 | 13.6 | 5.3% |
| 85 | 16.8 | 19.0 | 19.8 | 18.1% |
| 90 | 20.3 | 24.0 | 26.0 | 28.3% |
At 80 the three strategies are within 5.3% of each other. Around the average life expectancy for someone already in their sixties, the decision that gets written about endlessly is worth a rounding error.
It is the tails where it matters. Die at 75 and claiming early was better by 31.7%. Live to 90 and waiting was better by 28.3%.
So it is not a maximization problem
If the expected values are roughly equal, then choosing a claiming age is not an optimization. It is a choice about which risk you would rather carry.
Claiming early insures you against dying young. You receive something rather than nothing. That matters more if your health is poor, if longevity does not run in your family, or if the alternative is drawing down a portfolio you would rather leave intact.
Delaying insures you against living long. This is the one the arithmetic understates, because it is not really about the break-even. An inflation-adjusted payment that cannot run out, arriving in the years when your portfolio might have, is the cheapest longevity insurance available anywhere. No annuity on the market prices as well.
Framed that way, the answer depends on which outcome would actually hurt. Running out of money at 92 is a far worse problem than leaving money unclaimed at 68, which is the honest case for delaying and has nothing to do with maximizing a total.
What actually should move the decision
Your health, honestly assessed. The tables assume average longevity. If yours is materially below average, the arithmetic genuinely favors claiming early, and no amount of general advice overrides that.
Whether you are married. This essay ignores spousal and survivor benefits, and for a couple they often dominate. The higher earner's claiming age sets the survivor benefit for whichever of you lives longer, which frequently makes delaying the higher earner's claim the single most valuable move available. If you are married, the individual break-even tables above are not your problem to solve.
Whether you are still working. Claiming before full retirement age while earning above a threshold triggers an earnings test that withholds benefits, though it is restored later. Claiming early while still working is usually the worst of both.
What else you would have to sell. Delaying means funding those years from somewhere, and if that means selling equities into a downturn, the sequence risk can cost more than the extra credits earn. This connects directly to which account you draw from.
What this leaves out
Dollar amounts. This essay prints none. Benefits depend on your earnings record and change annually with the cost-of-living adjustment. Get your actual numbers from your Social Security statement and nowhere else.
Taxation of benefits. Up to 85 percent of benefits can be taxable depending on your other income, which interacts with withdrawal order in ways this model does not capture.
Program risk. The trust fund has a projected depletion date, after which incoming payroll taxes would cover only part of scheduled benefits absent legislation. Reasonable people weigh that differently. We think claiming early to front-run a political outcome is speculation rather than planning, but it is not an unreasonable thing to hold an opinion about.
The thing worth taking away is narrower than the usual advice and more useful. Waiting is probably right if you are healthy, married and the higher earner. It is much closer to a coin flip than the confident articles suggest. And the reason to wait is not that you will come out ahead, but that the year you might have run out of money is the year the larger check arrives.
Sources and further reading
The rule structure and the actuarial statement come from the Social Security Administration. The arithmetic is our own.
- Early or Late Retirement, SSA Office of the Chief Actuary. The reduction formula: five ninths of one percent per month for the first 36 months, five twelfths beyond, producing a 30 percent reduction at 62 against a full retirement age of 67.
- Delayed Retirement Credits, SSA. Confirms the 8 percent annual credit, two thirds of one percent monthly, for anyone born in 1943 or later, stopping at 70.
- Incentivizing Delayed Claiming of Social Security Retirement Benefits Before Reaching the Full Retirement Age, Social Security Bulletin. The source of the actuarial fairness statement quoted above.
- my Social Security, for your own benefit estimate, which is the only figure that applies to you.