Eight years of waiting, one check for life.

The facts, in one place.

Six quotable sentences from the regulations. The percentages are fixed by rule; only the dollars are yours.

1. Full retirement age is 66 for people born from 1943 through 1954, rises by two months for each birth year from 1955 through 1959 (66 and 10 months for 1959), and is 67 for anyone born in 1960 or later.
2. Claiming before full retirement age reduces the benefit by five-ninths of one percent for each of the first 36 months and five-twelfths of one percent for each month beyond 36. For someone born in 1960 or later, claiming at 62 pays 70.0% of the full amount.
3. Each month of delay past full retirement age adds two-thirds of one percent, or 8 percent a year, until age 70. Claiming at 70 with a full retirement age of 67 pays 124.0% of the full amount; with a full retirement age of 66, 132.0%.
4. The spread from 62 to 70 is 77.1% for those born in 1960 or later: the same earnings record pays that much more each month for waiting eight years.
5. In plain dollars, before cost-of-living increases, waiting from 62 to full retirement age catches up at about 78 and 9 months, and waiting from full retirement age to 70 catches up at about 82 and 7 months.
6. Delayed credits stop at 70. There is no reason, under the retirement benefit rules alone, to wait past that month.

Benefit by claiming age.

The whole rule as a table: what each claiming age pays, for the two full retirement ages most people have. A full retirement age with months (1955 through 1959) falls between the two columns.

How the rules work.

Social Security pays a full benefit at full retirement age, which depends on the year of birth. Claiming earlier trades a permanently smaller check for more of them: the reduction is five-ninths of one percent for each of the first 36 months before full retirement age and five-twelfths of one percent for each month beyond, so 60 months early is a 30 percent cut. Claiming later trades fewer checks for permanently larger ones: two-thirds of one percent for each month of delay, 8 percent a year, until 70, when the credits stop.

The break-even age is where the larger, later check has paid out as much in total as the smaller, earlier one. In plain dollars it lands in the late 70s for the 62-versus-full-age choice and the early 80s for the full-age-versus-70 choice. Cost-of-living increases apply to whichever benefit you take, so they do not change the comparison much; taxes, the earnings test before full retirement age, a spouse's benefit, and a survivor's benefit can change it a great deal.

Methodology.

1. Inputs. The monthly benefit at full retirement age (the primary insurance amount, as the statement shows it), the year of birth, and the age to plan to.
2. Full retirement age. From the table in 20 CFR 404.409(a) by year of birth.
3. The factor. For each claiming age from 62 to 70 in whole years, plus full retirement age itself when it carries months: the reduction of 20 CFR 404.410 for months before full retirement age, or the credit of 20 CFR 404.313 for months after, applied to the full benefit and rounded down to the dime as Social Security does.
4. Lifetime totals. The monthly benefit times the months from the claiming age to the planning age, in today's dollars with no cost-of-living adjustment. The break-even age is the first month in which the later option's total exceeds the earlier one's.
5. Validation. Eight cases pin the factors the regulations imply, including 70 percent at 62 and 124 percent at 70 for a full retirement age of 67, and 75 and 132 percent for 66. A wrong fraction fails the build.
6. Not modeled. Cost-of-living adjustments, the earnings test, income tax on benefits, spousal and survivor benefits, the family maximum, and mortality. Educational, not advice.

Sources.

1. 1. Code of Federal Regulations (Cornell LII), 20 CFR § 404.331 and § 404.336 — Divorced spouse's and surviving divorced spouse's benefits. That a divorced spouse is entitled on the former spouse's record if the marriage lasted at least ten years, the claimant is unmarried and at least 62, and the former spouse is entitled to benefits, or is at least 62 and the divorce is at least two years old (404.331); and that a surviving divorced spouse of a ten-year marriage has the same benefit as a widow or widower (404.336). Retrieved September 6, 2026; verified September 6, 2026.
2. 2. Code of Federal Regulations (Cornell LII), 20 CFR § 404.333 — Wife's and husband's benefit amounts. That a spouse's monthly benefit is one-half of the insured person's primary insurance amount before any reduction for age. Retrieved September 6, 2026; verified September 6, 2026.
3. 3. Code of Federal Regulations (Cornell LII), 20 CFR § 404.338 — Widow's and widower's benefits amounts. That a survivor's benefit is the deceased's primary insurance amount at full retirement age, and that if the deceased had taken a reduced retirement benefit the survivor's benefit is limited to the larger of that reduced amount or 82.5 percent of the primary insurance amount (paragraph (c)). Retrieved September 6, 2026; verified September 6, 2026.
4. 4. Code of Federal Regulations (Cornell LII), 20 CFR § 404.409 — What is full retirement age?. The full-retirement-age table by year of birth for retirement benefits (66 for 1943–1954, rising two months a year through 1959, 67 for 1960 and later), paragraph (a); and for widow's and widower's benefits, two birth years behind it (66 for 1945–1956, 67 for 1962 and later), paragraph (b). Retrieved September 4, 2026; verified September 4, 2026.
5. 5. Code of Federal Regulations (Cornell LII), 20 CFR § 404.410 — How does SSA reduce my old-age benefits when my entitlement begins before full retirement age?. The early-claiming reduction: 5/9 of one percent for each of the first 36 months before full retirement age and 5/12 of one percent for each month beyond 36. Retrieved September 4, 2026; verified September 4, 2026.
6. 6. Code of Federal Regulations (Cornell LII), 20 CFR § 404.313 — What are delayed retirement credits and how do they increase my old-age benefit amount?. The delayed retirement credit of 2/3 of one percent for each month of delay past full retirement age for those born in 1943 or later, accruing until the month age 70 is reached. Retrieved September 4, 2026; verified September 4, 2026.

Revision history.

September 6, 2026

Added the spousal benefit fraction (404.333) and its reduction (404.410(b)) for the spousal benefit tool.

September 6, 2026

Added the survivor full-retirement-age table (404.409(b)), the 28.5 percent survivor reduction from age 60 (404.410(c)), and the widow's limit (404.338(c)) for the survivor benefit timing tool.

September 4, 2026

First release: the full-retirement-age table, the early reduction fractions, and the delayed retirement credit transcribed from 20 CFR 404.409, 404.410, and 404.313, with the claiming calculator built on them.

Canonical address: https://consideratecapital.com/tools/social-security-claiming-calculator