Social Security break-even calculator

You can claim Social Security any time from 62 to 70 — smaller checks for longer, or bigger checks for fewer years. On the defaults — a $2,000 benefit at a full retirement age of 67, claiming at 62 ($1,400/mo) versus 70 ($2,480/mo) — the totals cross at age 80.4: wait, and every year you live past it pays. The formula, the longevity bet and every assumption are below the worksheet.

Worksheet

FRA benefit (monthly, at full retirement age) $ / mo

Your full retirement age yrs

Claim age A yrs

Claim age B yrs

Life expectancy yrs

Break-even age age 80.4

Monthly benefit at 62: $1,400
Monthly benefit at 70: $2,480
Lifetime total by 85 — claiming at 62: $386,400
Lifetime total — claiming at 70: $446,400
Who wins by 85: Claim at 70

How the formula works

Social Security lets you start your retirement benefit any time from age 62 to 70. There is one benefit the system treats as “full” — the amount payable at your full retirement age (FRA), which is 67 for anyone born in 1960 or later and 66 for those born 1943–1954. Claim before that age and each check is permanently reduced; wait past it and each check is permanently increased. Nothing about your earnings record changes — only the size of the monthly payment.

Claiming before FRA. The reduction is $\tfrac{5}{9}$ of 1% a month for the first 36 months early, then $\tfrac{5}{12}$ of 1% a month for anything beyond 36:

\[ \text{reduction} \;=\; \underbrace{n_1\times\tfrac{5}{9}\%}_{n_1\le 36\text{ mo}} \;+\; \underbrace{n_2\times\tfrac{5}{12}\%}_{\text{months beyond }36}, \qquad B \;=\; B_{\mathrm{FRA}}\,(1-\text{reduction}) \]

At 62 with an FRA of 67 that is 60 months early: $36\times\tfrac{5}{9}\% + 24\times\tfrac{5}{12}\% = 20\% + 10\% = 30\%$ off, so the check is 70% of the full benefit.

Waiting past FRA. Delayed retirement credits add $\tfrac{2}{3}$ of 1% a month — 8% a year — up to age 70, where they stop:

\[ B \;=\; B_{\mathrm{FRA}}\Bigl(1 + m\times\tfrac{2}{3}\%\Bigr), \qquad m = \text{months after FRA} \]

At 70 with an FRA of 67 that is 36 months of credits: $36\times\tfrac{2}{3}\% = 24\%$ more, so the check is 124% of full.

The break-even. Cumulative benefits received are simply the monthly benefit times the number of months you have collected:

\[ C(\text{age}) \;=\; B \times \text{months since claiming} \]

The earlier claimer gets a head start of smaller checks; the later claimer starts behind but collects more each month. The break-even age is where the two running totals are equal. Setting the cumulative totals equal — the shared factor of 12 months a year cancels — and solving for the age $t$ gives:

\[ B_A\,(t-a) \;=\; B_B\,(t-b) \quad\Longrightarrow\quad t^{*} \;=\; \frac{B_A\,a - B_B\,b}{B_A - B_B} \]

where $a$ and $b$ are the two claim ages and $B_A,B_B$ their monthly benefits. Live past $t^{*}$ and waiting wins; die before it and claiming early wins. That is the whole trade: the break-even is a longevity bet. No one knows their own date, which is why the answer is a age, not a verdict — this tool also totals each choice by a life expectancy you set, so you can see the size of the bet. It ignores spousal and survivor benefits and cost-of-living adjustments, both of which tilt the real decision toward waiting; see the assumptions below.

What each input means

FRA benefit — monthly, at full retirement age: The benefit you would receive by claiming exactly at your full retirement age, in today's dollars. It is the anchor every other age is scaled from. Your real figure is on your Social Security statement at ssa.gov; the average retired-worker benefit is near $2,000 a month. Note that this number does not change the break-even age — it scales both choices equally — but it does set the dollar totals.
Your full retirement age: 67 for anyone born in 1960 or later, 66 for those born 1943–1954 (with in-between months for 1955–1959 birth years, not modelled here). It is the pivot: claim below it and checks shrink, above it and they grow.
Claim age A and claim age B: The two ages you want to compare, each between 62 and 70. A is the earlier choice in the worked example (62), B the later (70), but the tool compares whatever pair you pick.
Life expectancy: The age you want to total the two choices through. It does not affect the break-even age — that is fixed by the benefits — but it decides who actually comes out ahead for you. The Social Security actuaries put average remaining life for a 65-year-old in the mid-80s; many people live well past it, which is the case for waiting.

A worked example

The worksheet's defaults: a $2,000-a-month benefit at a full retirement age of 67, comparing a claim at 62 against a claim at 70, totalled through age 85.

Claiming at 62 is 60 months early: $36\times\tfrac{5}{9}\% + 24\times\tfrac{5}{12}\% = 30\%$ off, so 70% of $2,000 = $1,400 a month.
Claiming at 70 earns 36 months of delayed credits: $36\times\tfrac{2}{3}\% = 24\%$ more, so 124% of $2,000 = $2,480 a month.
The break-even: $t^{*} = ($1,400\times62 - $2,480\times70) / ($1,400 - $2,480)$ = age 80.4. The early claimer is ahead on cumulative dollars until then; the late claimer is ahead forever after.
Totalled through 85: claiming at 62 pays $1,400 × 276 months = $386,400; claiming at 70 pays $2,480 × 180 months = $446,400. Living to 85 clears the break-even, so Claim at 70 comes out ahead by $60,000.

Fig. 1 — Cumulative benefits by age on the defaults. Claiming at 62 (solid) leads early; claiming at 70 (dashed) starts eight years later but rises faster and overtakes it at age 80.4. Past that crossing the gap only widens in favour of waiting.

Assumptions and limits

Everything is nominal — cost-of-living adjustments (COLAs) are ignored. Because COLAs are a percentage of a larger check, they compound the advantage of the bigger benefit, so real life tilts slightly further toward waiting than this shows.
Taxes on benefits are ignored. Depending on your other income, up to 85% of your benefit can be subject to federal income tax, which can change the after-tax comparison.
Spousal and survivor benefits are ignored. For a married couple, the higher earner's decision to wait permanently raises the survivor benefit the widow or widower keeps — often the strongest reason to delay, and invisible in a single-person break-even.
The earnings test is ignored. If you claim before FRA and keep working, part of your benefit can be withheld until FRA — not modelled here.
The reduction and delayed-credit formulas are the SSA rules for full retirement ages of 66 and 67. Birth years 1955–1959 have FRAs of 66 and 2–10 months, approximated here by the nearest whole-year option.
It is a longevity bet on a date no one knows. The break-even age is exact; whether you reach it is not. This is arithmetic, not advice.

Questions people ask

What is the Social Security break-even age?

It is the age at which the total benefits collected by waiting catch up to the total collected by claiming earlier. Before it, the early claimer is ahead on cumulative dollars; after it, the later claimer is ahead for the rest of life. For the common 62-versus-70 comparison it typically lands in the late 70s to around age 80 — on the $2,000 default here it is age 80.4. Live past the break-even and waiting paid off; don't and claiming early did.

Should I claim early or wait?

It depends on three things this tool can't know for you: how long you expect to live (family history and health), what other income you have (if you need the money at 62, that settles it), and whether you're married. Waiting is a guaranteed, inflation-adjusted 8%-a-year increase you can't buy anywhere else — valuable if you're healthy and can afford to bridge the gap. Claiming early makes sense if you need the income, expect a shorter life, or want to preserve other assets. Run both ages against an honest life expectancy and see the size of the bet.

Does waiting past 70 help?

No. Delayed retirement credits stop accruing at age 70, so there is no benefit increase for waiting beyond it — you would simply forgo months of payments for nothing. If you haven't claimed by 70, claim at 70. (Waiting from FRA to 70 is where the credits are earned; that is why 70 is the latest age this tool offers.)

What about spousal and survivor benefits?

They can flip the decision, and this single-person tool leaves them out. The big one is the survivor benefit: when one spouse dies, the survivor keeps the larger of the two benefits. So the higher earner's choice to wait doesn't just raise their own check — it raises the amount the surviving spouse will live on, possibly for decades. For couples, that is often the single strongest argument for the higher earner to delay to 70, regardless of a single-life break-even.

Are Social Security benefits taxed?

They can be. Depending on your combined income, up to 85% of your benefit may be subject to federal income tax (some states tax it too). This calculator compares gross benefits and ignores tax, so your after-tax break-even could differ — generally the effect is modest, but it is worth checking against your own tax situation.