Social Security: The Complete Guide
Social Security is the foundation of most retirement plans — providing inflation-adjusted income for life. When and how you claim can mean a difference of hundreds of thousands of dollars over your lifetime.
How Your Benefit Is Calculated
- 35 highest-earning years are selected (adjusted for wage inflation)
- Average Indexed Monthly Earnings (AIME) is calculated
- A progressive formula converts AIME to your Primary Insurance Amount (PIA) — the benefit at age 67
- PIA is then adjusted based on when you claim (reduced if early, increased if delayed)
When to Claim: Age 62 vs 67 vs 70
Based on a $2,000/month benefit at Full Retirement Age (67). Reductions and increases are permanent.
| Claim Age | Adjustment | Monthly | Annual | Note |
|---|---|---|---|---|
| 62 | 30% | $1,400 | $16,800 | 5 years early |
| 63 | 25% | $1,500 | $18,000 | 4 years early |
| 64 | 20% | $1,600 | $19,200 | 3 years early |
| 65 | 13.3% | $1,733 | $20,800 | 2 years early |
| 66 | 6.7% | $1,867 | $22,400 | 1 year early |
| 67 | 0% | $2,000 | $24,000 | Full Retirement Age |
| 68 | +8% | $2,160 | $25,920 | 1 year delayed |
| 69 | +16% | $2,320 | $27,840 | 2 years delayed |
| 70 | +24% | $2,480 | $29,760 | Maximum benefit |
Spousal Benefits
Spousal Benefit (Living Spouse)
- Up to 50% of the higher earner's PIA
- Available at age 62 (reduced) or 67 (full 50%)
- The higher earner must have filed for their own benefit
- You receive the greater of your own benefit or the spousal benefit — not both
- Does NOT increase with delayed credits past 67
Survivor Benefit (Deceased Spouse)
- Up to 100% of the deceased spouse's benefit
- Available at age 60 (reduced) or FRA (full)
- Includes delayed retirement credits the deceased earned
- This is why the higher earner should delay to 70 — it maximizes the survivor benefit
- Can switch between own benefit and survivor benefit strategically
Earnings Limit (Working While Collecting)
| Situation | Earnings Limit | What Happens |
|---|---|---|
| Under FRA (all year) | $22,320/year (2024) | $1 withheld for every $2 earned over limit |
| Year you reach FRA (months before) | $59,520/year (2024) | $1 withheld for every $3 earned over limit |
| Month you reach FRA and after | No limit | Earn as much as you want — no reduction |
Taxation of Social Security Benefits
Up to 85% of your Social Security can be taxed as ordinary income, based on "provisional income" (AGI + ½ of SS + tax-exempt interest).
| Filing Status | Provisional Income | SS Taxed |
|---|---|---|
| Single | Under $25,000 | 0% of SS taxed |
| Single | $25,000 – $34,000 | Up to 50% of SS taxed |
| Single | Over $34,000 | Up to 85% of SS taxed |
| Married | Under $32,000 | 0% of SS taxed |
| Married | $32,000 – $44,000 | Up to 50% of SS taxed |
| Married | Over $44,000 | Up to 85% of SS taxed |
WEP & GPO (Public Employees)
Windfall Elimination Provision (WEP)
Reduces your own SS benefit if you also receive a pension from work not covered by Social Security (many state/local government jobs). Can reduce benefits by up to $587/month (2024). Does NOT apply if you have 30+ years of "substantial earnings" under SS.
Government Pension Offset (GPO)
Reduces spousal/survivor SS benefits by 2/3 of your government pension. Example: $3,000/month pension → $2,000 offset → spousal benefit reduced by $2,000. Often eliminates the spousal benefit entirely for public employees.
Optimal Claiming Strategies
Single Filer
If healthy and can afford to wait: delay to 70. Each year past 67 adds 8% permanently. If you have health concerns or need income immediately: claim at 62–64 and invest the difference. Break-even is typically age 78–82.
Married Couple (Similar Earnings)
Higher earner delays to 70 (maximizes survivor benefit). Lower earner can claim at 62–67 to provide bridge income. The survivor will keep the higher of the two benefits — so maximizing the larger benefit protects both spouses.
Married Couple (One High Earner)
High earner delays to 70. Lower earner claims their own benefit at 62 (even if small), then switches to the spousal benefit (50% of high earner's PIA) when the high earner files. This provides income during the delay period.
Divorced Spouse
If married 10+ years and currently unmarried, you can claim on your ex-spouse's record (up to 50% of their PIA). This does NOT reduce your ex's benefit. You can claim even if your ex hasn't filed yet (if divorced 2+ years and both 62+).
2024/2025 Key Numbers
Model different Social Security claiming ages in your retirement plan