The Three Brackets That Set Your Social Security Check

AIME is not your salary, and the bend points are not from the year you retire

Two details do most of the damage. The first is that average indexed monthly earnings are built from the highest 35 years, indexed to national average wage growth, and divided by 420 months — so a career of 30 years includes five zeros, and a year of low earnings early on is scaled up to today's wage level rather than counted at its face value. Someone with a steady 78,000 dollars of current earnings does not have an AIME of 6,500; they have whatever their indexed 35-year history produces, which is usually lower. The second is that the bend points applied to that AIME are the ones published for the year the worker reaches 62 — the year of first eligibility — and not the year the benefit is claimed. Someone turning 62 in 2026 keeps the 1,286 and 7,749 hinge points even if they claim in 2033.

The progressivity in the formula is severe and it is deliberate. At an AIME of 1,286 dollars the primary insurance amount is 1,157.40, a replacement rate of 90 percent. At 3,000 it is 1,705.80, or 56.9 percent. At 6,500 it is 2,825.80, or 43.5 percent. At 12,000 it is 3,863.20, or 32.2 percent. That falling curve is the whole design: the programme replaces most of a low earner's wage and a third of a high earner's. It also means the marginal value of an extra year of work depends entirely on where your AIME sits — an extra 100 dollars of AIME is worth 90 dollars a month in the first bracket, 32 in the second and 15 in the third.

Early and late are not mirror images

The reduction for claiming before full retirement age is set by 42 U.S.C. § 402(q): five ninths of one percent for each of the first 36 months and five twelfths of one percent for each month beyond. That is 6.67 percent for each of the first three years and 5 percent a year after that. The credit for claiming after full retirement age is set by a different provision, § 402(w), at two thirds of one percent a month — 8 percent a year — and the increment months stop at age 70. So the two directions run at different rates, and the upward one has a hard stop that the downward one does not. Claiming at 71 pays exactly what claiming at 70 pays, minus a year of payments.

Put numbers on it. On the primary insurance amount of 2,825.80 dollars computed above, with a full retirement age of 67: claiming at 62 means 60 months early, which is 36 × 5/9 plus 24 × 5/12, or 20 plus 10, a 30 percent cut giving 1,978 a month. Claiming at 65 is 24 months early, a 13.33 percent cut giving 2,449. Claiming at 70 is 36 months late, a 24 percent increase giving 3,503. The earliest and latest cheques differ by 77 percent. And the cost-of-living adjustment — 2.8 percent for 2026 — applies proportionally to both, so it never changes that ratio; anyone arguing that waiting is worse because of inflation has the arithmetic backwards.

What a simplified calculator can and cannot tell you

Any tool that asks for a single average annual earnings figure is approximating the AIME, and the approximation runs in a known direction. Real careers have low-earning early years and gaps; a flat average has neither, so it overstates the indexed 35-year average for most people and therefore overstates the benefit. It also cannot know your actual earnings record, which is the only thing that settles the question — and the record is available to you directly from the administration, which publishes an individual statement. Use the calculator to see the shape of the trade-off between claiming ages and the shape of the bracket structure, then use your own statement for the level.

There is a second, subtler limitation worth naming, because it applies to every retirement projection in every country: the constants move. The bend points are re-derived every year from the national average wage index, the cost-of-living adjustment is set every autumn, the taxable maximum changes, and the statutory retirement age itself has been amended more than once. A projection made today is arithmetic conditional on today's parameters, not a forecast of the parameters. Rerun it whenever the annual figures are published, and treat any number you wrote down more than a year ago as stale.

Deciding when to claim is a question about longevity and cash flow

The arithmetic of a break-even point is simple and it is not the whole answer. Claiming at 62 gives 1,978 dollars a month against 3,503 at 70, so the early claimer collects eight years of payments the later one forgoes, and the later one collects 1,525 more each month thereafter. Ignoring the cost-of-living adjustment, which applies equally to both and therefore cancels, the crossover falls in the early eighties. What that calculation cannot include is the two things that usually decide it: whether you have other income to live on between 62 and 70, and how long you and a surviving spouse are likely to live — because a higher benefit also raises the survivor benefit, which is why the higher earner's claiming age matters for two lifetimes rather than one.

There is one more asymmetry worth stating plainly. A claim made early is permanent — the reduction does not reverse when you reach full retirement age, and the benefit continues at the reduced level, adjusted for inflation, for life. A delay, by contrast, is reversible in one direction only: you can always claim later than planned, but you cannot buy back the credits you did not earn. That asymmetry is a reason to default to caution rather than to speed if the decision is genuinely close and you can afford to wait.

Frequently asked questions

Is full retirement age 67 for everyone?

No, and this is the most repeated error about the American system. Under 42 U.S.C. § 416(l), retirement age is 67 only for individuals who attain early retirement age — age 62 — after 31 December 2021, which means those born in 1960 or later. For people who reached 62 between 2017 and 2021, that is those born from 1955 to 1959, the age rises by two months for each year: someone born in 1957 has a full retirement age of 66 years and 6 months, and someone born in 1959 has 66 years and 10 months. This matters directly for the reduction. Claiming at 62 with a full retirement age of 67 is 60 months early, a 30 percent cut. Claiming at 62 with a full retirement age of 66 years and 6 months is 54 months early, a 27.5 percent cut. Same claiming age, different penalty, because the reference point moved.

Is waiting until 70 always worth it?

Not always, but the arithmetic is more favourable than people assume, for two reasons that get missed. First, the delayed retirement credit of two thirds of one percent a month is 8 percent a year, and the early reduction is 6.67 percent for the first three years and 5 percent after — so the two directions are not symmetric, and the upward move is the steeper one. On a primary insurance amount of 2,825.80 dollars, claiming at 62 gives 1,978 and claiming at 70 gives 3,503: 77 percent more, for life. Second, the cost-of-living adjustment applies proportionally to both, so it never favours the early claim. Against that: you must be able to live on something else in the meantime, the credits stop at 70 so there is nothing to gain by waiting longer, and health and family longevity matter more than the break-even year, which falls in the early eighties.

Why is my estimate lower than the calculator's?

Almost always because the calculator was given a flat average and your record is not flat. Average indexed monthly earnings come from the highest 35 years divided by 420 months, so a career of 30 years carries five zeros, and part-time years, study years and caring years pull the average down even after indexing. A calculator that takes today's salary and divides by twelve is describing a worker who earned that amount, indexed, for 35 years. There is a second, smaller source of difference: the bend points used should be those of the year you turn 62, so a tool carrying an older year's figures — 1,174 and 7,078 were the 2024 values, against 1,286 and 7,749 for 2026 — will produce a slightly different primary insurance amount. Your own statement from the administration settles both questions, because it uses your actual record.

What are bend points, and do they change?

They are the two hinge amounts in the three-bracket benefit formula, and they change every year. For 2026 they are 1,286 and 7,749 dollars of average indexed monthly earnings, published in the Social Security Administration's annual cost-of-living notice. They are not chosen: they are the 1979 values of 180 and 1,085 dollars, multiplied by the ratio of the national average wage index for the second year before the year in question to the index for 1977, then rounded to the nearest dollar. That is why they move roughly with wages rather than with prices. The crucial detail is which year's bend points apply to you: they are the ones for the year you reach 62, and they stay with you afterwards. Claiming later does not move you to a later year's brackets.

Does inflation adjustment change the case for waiting?

No, and this is worth stating because the opposite is often assumed. The cost-of-living adjustment — 2.8 percent for 2026, published in the annual notice — is applied proportionally to whatever benefit you are receiving. It therefore multiplies the early benefit and the late benefit by the same factor and leaves the ratio between them untouched. If the reduced benefit is 1,978 dollars and the increased one 3,503, they remain in the same 1.77 proportion after any number of adjustments. What inflation does change is the real value of the payments received between 62 and 70 by the early claimer, and it changes it in both directions depending on what those payments are spent on or invested in. The claiming decision turns on longevity, on the survivor benefit and on whether you can afford to wait — not on the adjustment rate.