Educational information, not individual financial advice.
Social Security is the single largest source of retirement income for most Americans. For about a third of retirees, it's the only significant source. Getting the decisions right — especially when to claim — can change lifetime benefits by hundreds of thousands of dollars per couple.
The basics — how benefits are calculated, what your Primary Insurance Amount (PIA) means, and what Full Retirement Age (FRA) is.
Claiming strategies — the 62-vs-FRA-vs-70 decision, break-even analysis, and the factors that should tilt you one way or the other.
Family benefits — spousal and survivor benefits, which are often undervalued.
Taxation — how benefits become taxable once your other income crosses certain thresholds.
If you're planning when to claim, read "Claiming Strategy: 62 vs FRA vs 70" and "Break-Even Analysis" first. These are the highest-impact decisions.
If you're married, also read "Spousal Benefits" and "Survivor Benefits" — household strategy differs from individual strategy.
If you're still working and curious about the mechanics, "How Your PIA Is Calculated" and "Bend Points and AIME" cover the underlying formula.
The Social Security page in Horizons estimates your Primary Insurance Amount based on your earnings history and lets you model different claiming ages. The engine applies the correct factors for early or delayed claiming, integrates spousal and survivor benefits where applicable, and includes the result in your overall retirement forecast. Claim-timing scenarios are one of the most impactful inputs to your long-run readiness score.
Which single decision has the largest dollar impact on Social Security lifetime benefits?
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