The scenario
You pull up your Social Security statement on ssa.gov. It shows a benefit of $1,800/month at age 62 and $4,000/month at age 70. Huge numbers. But you plan to stop working at 55 — a full 7 to 15 years before those claiming ages. Are those estimates still accurate?
No. They're significantly overstated. The SSA estimator projects your future earnings at roughly your current salary level through whatever claiming age you select. If you earn $120,000 today and look at your age-70 estimate, the calculator assumes you'll earn approximately $120,000 every year from now until you turn 70. Stop working at 55, and reality diverges sharply from the projection.
How Social Security benefits are calculated
Your benefit is based on your Average Indexed Monthly Earnings (AIME) — the average of your highest 35 years of earnings, indexed for wage inflation.
The calculation:
- Take your annual earnings for each year of covered employment
- Index each year's earnings to current wage levels using the SSA's National Average Wage Index
- Select the highest 35 years of indexed earnings
- Divide the total by 420 (35 years × 12 months) to get your AIME
- Apply the PIA formula (progressive bend points) to get your Primary Insurance Amount
If you have fewer than 35 years of earnings, zeros fill the remaining years. If you have more than 35, the lowest years are dropped.
What happens when you stop working at 55
Suppose you worked from age 22 to 55 — that's 33 years of covered earnings. Your top 35 years include 2 years of zeros. Every zero year drags down your AIME.
But more importantly: if you stop working at 55 and don't claim until 70, the SSA estimate assumed 15 more years of high earnings that will never materialize. Those phantom years are worth a lot.
Worked example: the real vs. projected benefit
Profile: age 50, earning $120,000/year, worked since age 22 (28 years of earnings so far), plans to stop at 55.
SSA.gov shows at age 70: $3,950/month (assumes earning $120,000/year through age 70)
Actual at age 70 with no earnings after 55:
Let's trace through the AIME calculation. With 33 years of actual earnings (ages 22-55) and 35 years in the formula, 2 years are zeros. But the real impact is that the 15 years of projected high earnings (ages 55-70) don't exist.
Under the SSA projection, those 15 years at ~$120,000 would have replaced lower-earning early-career years and filled the formula completely. Without them:
- AIME drops from approximately $8,500 (projected) to roughly $6,800 (actual)
- PIA drops from approximately $3,200 to roughly $2,700
- Benefit at 70 (with delayed retirement credits): $3,348 instead of $3,950
That's $602/month less than projected — $7,224/year for life.
The magnitude depends on your earnings history. Someone who earned a high salary for their entire career and stops at 55 loses less (because early-career years being replaced were already relatively high). Someone whose highest-earning years would have been 55-65 loses more.
The compounding problem: indexing stops at age 60
There's a second, subtler effect. The SSA indexes your earnings to the National Average Wage Index, but only up to age 60. Earnings after age 60 are counted at face value — no inflation adjustment.
This means your early-career earnings get indexed up significantly (a $30,000 salary in 1998 might index to $55,000 in current terms), while your late-career earnings at $120,000 count at $120,000. The indexing partially compensates for the lower absolute numbers in your early years.
If you stop working at 55, you still benefit from this indexing of your existing earnings. But you miss out on the high unindexed earnings from ages 60-70 that would have been counted at full face value.
How to get your actual projected benefit
Method 1: SSA detailed calculator
The SSA offers a downloadable [Detailed Calculator](https://www.ssa.gov/oact/anypia/anypia.html) that lets you enter zero future earnings. Input your actual earnings history (available on your Social Security statement) and set future earnings to $0 starting in your planned retirement year.
Method 2: my Social Security account with manual override
On ssa.gov, the "my Social Security" account now offers a benefit estimator that lets you change your future earnings assumption. Set future annual earnings to $0 and specify the year you plan to stop working.
Method 3: quick approximation
A rough method:
- Count your years of substantial earnings (say, 30)
- Note that 5 years of zeros will be in your top 35
- Your AIME is approximately (sum of top 35 indexed earnings) / 420
- Each zero year reduces AIME by roughly (your average indexed annual earnings / 35 / 12)
For someone averaging $100,000 in indexed earnings: each zero year reduces AIME by about $238/month, which reduces PIA by roughly $214/month (at the 90% bend point) or $76/month (at the 32% bend point), depending on where your AIME falls.
The interaction with claiming age
The SSA.gov estimate muddles two separate effects:
- Delayed Retirement Credits (DRCs): 8% increase per year for each year you delay past FRA, up to age 70. This is a real, guaranteed increase that applies regardless of whether you're still working.
- Additional high-earning years: the assumed future earnings that increase your AIME. This only happens if you actually work.
An early retiree gets the DRCs but not the additional earnings. The DRCs alone make delaying valuable — but not as valuable as the ssa.gov estimate suggests, because the estimate bundles both effects together.
How much does the gap matter?
| Stop working at | Claim at 62 | Claim at 67 | Claim at 70 |
|---|---|---|---|
| 55 (actual) | $1,584 | $2,150 | $3,348 |
| 62 (SSA assumes) | $1,800 | — | — |
| 67 (SSA assumes) | — | $2,500 | — |
| 70 (SSA assumes) | — | — | $3,950 |
The gap between projected and actual widens at later claiming ages because more years of phantom earnings are assumed.
For someone earning $120,000 who stops at 55:
- Age 62 claim: actual is roughly 88% of projected
- Age 67 claim: actual is roughly 86% of projected
- Age 70 claim: actual is roughly 85% of projected ($3,348 vs. $3,950 — see the worked example above)
The age-70 gap is largest in dollar terms — about $602/month — because the SSA assumed 15 more years of high earnings, which represents the biggest fiction.
Impact on retirement planning
If you're planning for early retirement and using ssa.gov estimates to project income, you could be overestimating Social Security by $500-$1,500/month. For a retirement that lasts 30 years, that's $180,000-$540,000 in overstated lifetime income.
This doesn't mean you should change your retirement date — it means your financial plan should use the correct, lower benefit amount. Overestimating SS income leads to undersaving in your portfolio, which is exactly the wrong direction.
Strategies to mitigate the gap
Work a few more years: each additional year of high earnings replaces a zero or low-earning year in your top 35. The marginal impact is largest when you have fewer than 35 years of substantial earnings.
Part-time work: even modest earnings ($30,000-$50,000) can replace zero years in the calculation. The Social Security benefit from part-time work during semi-retirement may be worth more than the paycheck itself.
One important caveat: this only works cleanly if you have not yet claimed benefits (or are already past your Full Retirement Age). If you've claimed early and are under FRA, the retirement earnings test applies. In 2026, SSA withholds $1 of benefits for every $2 you earn above $23,400 (a higher $62,160 threshold, withholding $1 per $3, applies in the year you reach FRA). So $40,000 of part-time earnings while collecting an early benefit triggers roughly $8,300/year in withheld benefits. Those withheld amounts are restored via a recalculated (higher) benefit once you reach FRA, and the extra earnings still improve your AIME — but the year-to-year cash hit is real. The AIME boost is penalty-free only during the pre-claim "semi-retirement" window this guide describes, or after FRA.
Roth conversion bridge: the years between stopping work and claiming SS are ideal for Roth conversions. Your taxable income is low, you can fill the 10% and 12% brackets with conversions (2026: the 12% bracket tops out at $50,400 of taxable income for a single filer / $100,800 MFJ, on top of the standard deduction of $16,100 single / $32,200 MFJ), and the resulting Roth assets compensate for the lower-than-expected SS benefit.
The bottom line
Your ssa.gov estimate assumes you'll keep earning your current salary until you claim. If you plan to stop working years before filing, your actual benefit will be meaningfully lower — especially at later claiming ages where the gap between projected and actual earnings is largest. Always run the numbers with zero future earnings before building a retirement plan around Social Security estimates.