Should I claim Social Security at 62, 67 or 70? What 400,000 Monte Carlo lifetimes say
It depends on how long you live and what you do with the early checks. Across 400,000 simulated lifetimes (50,000 per cell, SSA 2022 mortality, real returns), delaying to 70 beats claiming at 62 in 59.09% of men’s and 69.82% of women’s lifetimes if every check is spent; in 36.55% / 47.17% if the early checks are invested in a balanced 4%-real portfolio; and in 27.99% / 35.44% in an equity-tilted 6%-real portfolio. Claiming exactly at 67 is the single best choice in only 11.4–14.2% of lifetimes across the cells, so the real contest is between claiming early and investing or delaying to 70. The deterministic break-even age for 62 versus 70 is 80 — see the full results table for all 8 cells.
Updated 2026-10-12: the study now uses the site’s own ingredients — the SSA 2022 period life table that the claiming-age and annuity calculators use (it used the SSA 2021 table) and the claiming factors of the claiming-age calculator, held to the planner engine’s. Every win rate moved by at most 1.39 percentage points; the balanced headline stayed at about 42% (41.99% → 41.86%). The earlier figures are in the JSON summary under previous_version.
Key numbers — each row links to the section that carries the full table. Updated 2026-10-12.
| Key number | Men | Women | Where on this page |
|---|---|---|---|
| Delaying to 70 beats claiming at 62 — every check spent (0% real) | 59.09% | 69.82% | Full results |
| Delaying to 70 beats claiming at 62 — early checks invested, balanced 4% real | 36.55% | 47.17% | Full results |
| Delaying to 70 beats claiming at 62 — early checks invested, equity-tilted 6% real | 27.99% | 35.44% | Full results |
| Claiming exactly at 67 is the single best choice (range across the cells) | 11.4–14.2% of lifetimes | Full results | |
| Deterministic break-even age, 62 vs 70 (Full Retirement Age 67, no investing) | 80 | The break-even age | |
| Simulated lifetimes | 400,000 (50,000 per cell × 8 cells) | Methodology | |
The standard advice — "delay Social Security to 70 if you can, because the break-even age is around 80 and most people live past it" — rests on a deterministic calculation that quietly assumes two things: that you know exactly how long you'll live, and that the early claimer earns nothing on the checks they collect first. We replaced both assumptions with a joint Monte Carlo. We sampled each lifetime's age at death from the SSA 2022 period life table, sampled each year's real return, and asked, across 400,000 lives: how often does delaying to 70 actually win?
Headline finding: The deterministic Social Security break-even age for claiming at 62 versus 70 is age 80 — a number that makes delaying look like a near-sure thing, since the median 62-year-old lives past it (to 82 for men and 85 for women). But once the early claimer invests the checks they receive first, delaying to 70 wins only 42% of lifetimes in a balanced 4%-real portfolio, and just 28% of lifetimes for men in an equity-tilted 6%-real portfolio. The claiming decision flips on the return you expect to earn — not just on how long you live.
The number everyone quotes is missing half the model
Open almost any Social Security explainer and you'll find the break-even age: the point where the bigger checks from delaying have added up to more total dollars than the smaller checks you'd have collected by claiming early. For a worker born in 1964, Full Retirement Age is 67; claiming at 62 pays 70% of the Primary Insurance Amount (PIA) and claiming at 70 pays 124% (SSA, early or late retirement). Run the cumulative arithmetic and claim-at-70 overtakes claim-at-62 at age 80 in our model; claim-at-67 overtakes claim-at-62 at 78, and claim-at-70 overtakes claim-at-67 at 82.
Because the median 62-year-old lives past 80, this makes delaying look obvious — although about 36% of 62-year-olds never reach it. And the break-even age assumes the early claimer keeps every check at 0% return. A 62-year-old who claims early and invests those checks is compounding eight extra years of cash flow that the age-70 claimer never had. That changes the math, and our simulation measures by how much.
The break-even age is a single point estimate hiding two full distributions. It collapses the distribution of lifespans into one assumed age, and it collapses the distribution of investment returns into zero. Restore both and "delay to 70" stops being a default and becomes a bet — one whose odds depend heavily on the return you expect to earn.
Headline chart: how often delaying to 70 actually wins
Probability that claiming at 70 beats claiming at 62 and investing
Share of 50,000 simulated lifetimes per cell where claim-at-70 produced more discounted lifetime real wealth than claim-at-62. Left to right: rising assumed real return on the early claimer's invested checks.
Read left to right, the bars fall through the 50% line. With no investing, delaying wins most lifetimes (the classic result). Add a conservative 2% real return and it's a coin flip for men (50.18%). By a balanced 4% real portfolio, delaying to 70 is the minority outcome for both sexes. By an equity-tilted 6% real portfolio, claiming at 62 and investing beats delaying in 72% of men's lifetimes.
Full results: all 8 regime × cohort cells
Each row is 50,000 simulated lifetimes. "70 beats 62" is the share of lives where claim-at-70 produced more discounted lifetime real wealth than claim-at-62. "70 is best" is the share where claim-at-70 beat both other strategies. "62 is best" is the share where claiming early and investing was the single best choice.
| Cohort | Return regime | 70 beats 62 | 67 beats 62 | 70 is best | 62 is best | Median age at death |
|---|---|---|---|---|---|---|
| Male | Spend it (0%) | 59.09% | 65.76% | 51.76% | 34.24% | 82 |
| Male | Conservative (2% real) | 50.18% | 56.22% | 42.00% | 43.76% | 82 |
| Male | Balanced (4% real) | 36.55% | 42.01% | 29.25% | 57.41% | 82 |
| Male | Equity-tilted (6% real) | 27.99% | 32.52% | 22.07% | 66.50% | 82 |
| Female | Spend it (0%) | 69.82% | 75.28% | 63.68% | 24.72% | 85 |
| Female | Conservative (2% real) | 62.10% | 67.46% | 54.26% | 32.52% | 85 |
| Female | Balanced (4% real) | 47.17% | 52.48% | 39.04% | 46.85% | 85 |
| Female | Equity-tilted (6% real) | 35.44% | 39.80% | 28.79% | 58.92% | 85 |
Three things jump out:
- The return assumption swings the answer more than sex does. For men, moving from spend-it to balanced cuts the "70 beats 62" probability by 22.5 percentage points — a bigger move than the gap between men and women in any single regime.
- Women favor delaying more than men, because they live longer (median age at death 85 vs 82 on the SSA 2022 table), giving the bigger age-70 checks more years to pay off. But even for women, an equity-tilted portfolio pushes "70 beats 62" down to 35.44%.
- Full Retirement Age (67) is rarely the single best choice. In every cell, claiming exactly at 67 is the outright winner least often (11.4–14.2% of lifetimes). The real contest is between the extremes: claim early and invest, or delay to the maximum.
CC-BY-4.0 — free for any use including republication and journalism, with attribution to QuantCalc Research.
Why this is not an argument against delaying
It would be easy to misread this as "always claim at 62." It isn't. Three caveats that the dataset makes explicit:
- Delaying buys longevity insurance, not just expected value. Claim-at-70 wins in the long lives, where the risk is outliving your money. A strategy that wins 42% of the time but wins in the longest lifetimes can still be the rational choice for a risk-averse retiree. The "70 is best" column counts wins, not how much each win is worth.
- The early claimer has to actually invest the checks — and earn the return. The case for claiming at 62 collapses if the money is spent, or if real returns disappoint. The "spend it" row is the baseline for anyone who would consume the early benefit: there, delaying wins 59%–70% of the time.
- Spousal and survivor benefits change the calculus. For married couples, the higher earner's delayed benefit also raises the survivor benefit — a factor this single-life model does not capture and which tilts toward delaying for the higher earner.
The candid takeaway is narrower and more useful than "claim early" or "delay": the claiming decision is dominated by the return you expect to earn on early benefits, and the popular break-even age conceals that entirely.
Methodology
Engine: ss-claiming-mc-2.0.0 · fixed seed 20261012 · 50,000 lifetimes per regime × cohort cell · 8 cells = 400,000 simulated lives. The generator is re-runnable and reproduces these figures exactly.
Longevity: Age at death sampled year-by-year from the SSA 2022 period life table (Social Security Administration, Office of the Chief Actuary; as used in the 2025 Trustees Report), separately for male and female cohorts — the same table the site’s claiming-age and annuity calculators use. We draw survival each year from the table's qx (probability of dying within the year at exact age x) until death or the table's last age, 119. The table is published in the JSON summary.
Benefits (a worker born in 1964, Full Retirement Age 67): claim at 62 = 70% of PIA (60 months early: 36 months at 5/9 of 1% and 24 at 5/12 of 1%, 20 CFR 404.410); claim at 67 = 100%; claim at 70 = 124% (delayed retirement credits of 2/3 of 1% a month for 36 months, 20 CFR 404.313). These are the claiming-age calculator’s factors, which are held to the planner engine’s. All figures are in real dollars, so the COLA-indexed benefit stream is level over time. Win-rate results are invariant to the PIA level because all three strategies scale linearly with PIA; we use a representative $24,000/yr ($2,000/mo) PIA at FRA.
Investing the difference: Every benefit dollar each strategy receives is banked into a portfolio earning the regime's annual real return, drawn Normal(μ, σ): spend-it μ=0%/σ=0%, conservative μ=2%/σ=6%, balanced μ=4%/σ=11%, equity-tilted μ=6%/σ=16%. All three strategies in a given life share the same realized return path. Lifetime wealth is the terminal portfolio at death, discounted back to age 62 at the regime's expected return so strategies are compared on equal opportunity-cost footing. These return draws are the study’s own: the planner’s Monte Carlo runs a plan’s whole portfolio and does not compare claiming ages life by life, so this question has no counterpart there.
Taxes: Benefits are modeled gross; federal tax on benefits depends on the rest of a household’s income and is not applied.
What this is not: Not a personalized plan, and not a couples model — it values three single-life claiming strategies for an identical-PIA representative retiree across the joint distribution of lifespan and returns. Spousal/survivor benefits, taxes, and individual health are out of scope and noted above.
The return regimes are round, illustrative assumptions, not forecasts. The full per-cell dataset and the mortality table are published above for anyone who wants to re-run with their own return and mortality assumptions.
When should you claim?
Your answer depends on your own life expectancy, your portfolio, and what you'd actually do with early checks. Run your real numbers — longevity, returns, and withdrawals — instead of trusting a one-size-fits-all break-even age.
Stress-Test Your Retirement Plan →Related research
- → 510,000-path 51-State Retirement Monte Carlo (2026) — the same couple in every state. California's state income tax over 30 years: $31,115; Oregon's: $146,914.
- → The 2026 ACA Cliff for Early Retirees — the pre-Medicare bridge companion study, where withdrawal ordering (not claiming age) is the lever.
- → The 4% Rule Under 6 Forward-Looking Forecasts — how forward-looking return assumptions reshape safe-withdrawal math, the same return-assumption sensitivity that drives this claiming result.
Frequently asked questions
Last updated 2026-10-12. Dataset license: CC-BY-4.0. Mortality data: SSA 2022 period life table (public domain). QuantCalc is an independent retirement-planning research project. Not affiliated with, endorsed by, or sponsored by the Social Security Administration or any government agency. Not financial, tax, or legal advice.