Social Security is the only retirement income source that is guaranteed for life, adjusted for inflation, and paid by the federal government. For most retirees, it is the single largest financial asset they have — often worth more than their entire retirement portfolio when valued as a stream of inflation-adjusted lifetime payments.
The decision of when to claim is the most consequential choice you will make. The difference between claiming at 62 and claiming at 70 can be about 77% in the size of your monthly check — for the rest of your life, plus your surviving spouse's life. Spread over a 25- or 30-year retirement, that decision is often worth several hundred thousand dollars.
Because of how much is at stake, the rules deserve to be understood — not skimmed.