$1,400,000 invested
The fictional household starts at age 52 with a balanced allocation and contributes $36,000 per year until retirement.
ASK LINC RESEARCH
We tested 685 historical retirement starting points.Two changes erased every shortfall in this example.
One fictional household. The same portfolio, Social Security assumption, and life expectancy. We changed only retirement age or spending, then reran the plan across 685 overlapping historical market sequences.
THE SETUP
A deliberately simple question: what actually changes the outcome?
$84,000 annual spending
The baseline plan assumes retirement spending of $84,000 per year through age 95.
$36,000 Social Security
The example assumes annual Social Security of $36,000 beginning at age 67.
685 historical sequences
Each scenario was run across 685 overlapping historical retirement windows drawn from U.S. market history beginning in July 1926.
THE RESULTS
Three scenarios. Same household. Very different historical outcomes.
620 of 685 histories lasted
At $84,000 of annual spending, the plan lasted through age 95 in 90.5% of tested historical sequences. 65 histories ran short.
Initial portfolio withdrawal: 4.9%.
685 of 685 histories lasted
Keeping retirement at 55 but lowering annual spending by $12,000 eliminated every historical shortfall in this test.
Initial portfolio withdrawal: 4.2%.
685 of 685 histories lasted
Working two additional years while keeping spending at $84,000 also eliminated every historical shortfall in this test.
Initial portfolio withdrawal: 4.3%.
Time and spending both created margin
Retiring at 57 produced about $252,389 more modeled assets at retirement than retiring at 55, while the lower-spending scenario reduced the amount the portfolio had to support each year.
THE TAKEAWAY
The useful question was not “does retirement work?” It was “which lever changes the answer?”
In this example, the baseline age-55 plan was not a binary failure: it survived most tested histories. But the weak historical sequences exposed how close the plan was to the edge. Two different changes created enough margin to remove those shortfalls from the historical record we tested: working two more years, or reducing annual spending by $12,000.
That is why Ask Linc treats retirement planning as a scenario problem rather than a single-number problem. The point is not to produce one confident answer; it is to show which assumptions are doing the work.
For the focused age comparison, see Retiring at 55 vs. 57 across the same 685 historical sequences →
METHODOLOGY & LIMITS
Historical stress tests are evidence—not probabilities.
July 1926–June 2026
The underlying historical dataset spans July 1926 through June 2026. The tested retirement start months run from July 1926 through July 1983.
43-year retirement horizon
Each tested sequence models the household through age 95. Because the histories overlap, the 685 tests are not 685 independent observations.
Deterministic calculation
The results were generated by Ask Linc’s retirement quick-plan engine. The language model does not calculate these outcomes.
Past markets are not future odds
A result such as 620 of 685 is a count of tested historical paths, not a 90.5% forecast of future retirement success.
Snapshot generated 2026-09-19. Dataset fingerprint: fa034188badc02bcdbe79d6041bdd7695abe574c66eb19f483565f44da71329f. Explore the retirement calculator, read how Ask Linc shows the math behind its answers, or browse all Ask Linc research.
START WITH THE DECISION
Change the assumption, not the spreadsheet.
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