Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Monthly at 70
$2,728
Monthly at full retirement age
$2,200
Monthly at 62
$1,540
Lifetime total claiming at 70
$491,040
Lifetime total claiming at 62
$425,040
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter benefit at full retirement age ($/mo).
- 2Enter full retirement age.
- 3Enter life expectancy.
- 4Read your monthly at 70 on the right — it updates as you type.
- 5Hit Share to keep the scenario or send it to someone.
About this calculator
Claiming early cuts your benefit up to 30%; waiting to 70 adds about 8% a year. This shows the monthly and lifetime tradeoff.
Worked example
Using the values the calculator loads with:
Inputs
- Benefit at full retirement age: 2200 $/mo
- Full retirement age: 67
- Life expectancy: 85
Results
- Monthly at 70: $2,728
- Monthly at full retirement age: $2,200
- Monthly at 62: $1,540
- Lifetime total claiming at 70: $491,040
- Lifetime total claiming at 62: $425,040
What each field means
Inputs
- Benefit at full retirement age ($/mo)
- The benefit at full retirement age used in the calculation, measured in $/mo. Starts at 2200 $/mo so you have a working example on load.
- Full retirement age
- The full retirement age used in the calculation. Starts at 67 so you have a working example on load. Accepted range: 65–67.
- Life expectancy
- The life expectancy used in the calculation. Starts at 85 so you have a working example on load. Accepted range: 65–105.
Results
- Monthly at 70
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Monthly at full retirement age
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Monthly at 62
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Lifetime total claiming at 70
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Lifetime total claiming at 62
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the social security claiming age calculator work?
Claiming early cuts your benefit up to 30%; waiting to 70 adds about 8% a year. This shows the monthly and lifetime tradeoff. The underlying maths is: Early: −5/9% per month before FRA. Delayed: +8% per year after FRA.
What do I need to enter?
3 values: benefit at full retirement age, full retirement age, and life expectancy. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the monthly at 70 result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Social Security Benefit Estimator. Retrieved from https://www.revenuelab.fyi/toolbox/social-security-estimate
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/social-security-estimate" target="_blank" rel="noopener">Social Security Benefit Estimator — RevenueLab</a> (2026).</p>
Source: [Social Security Benefit Estimator — RevenueLab](https://www.revenuelab.fyi/toolbox/social-security-estimate) (2026).