How Social Security Benefits Are Calculated
Social Security retirement benefits are based on your 35 highest-earning years, adjusted for wage inflation. The Social Security Administration (SSA) calculates your Average Indexed Monthly Earnings (AIME) from these 35 years, then applies a progressive benefit formula to determine your Primary Insurance Amount (PIA), which is your monthly benefit at full retirement age (FRA). Understanding this calculation helps you plan when to claim and how to maximize your benefits.
The benefit formula is intentionally progressive, replacing a higher percentage of income for lower earners. For 2026, the PIA formula replaces 90% of the first $1,174 of AIME, 32% of AIME between $1,174 and $7,078, and 15% of AIME above $7,078. This means higher earners receive larger absolute benefits but a lower percentage of their pre-retirement income. The maximum monthly benefit for someone claiming at full retirement age in 2026 is approximately $4,018.
Your monthly benefit permanently increases by about 8% per year for each year you delay claiming past your full retirement age (up to age 70). Claiming at 62 instead of 67 reduces your benefit by approximately 30%. This is one of the most impactful financial decisions you will make.
Social Security Benefit Formula
Impact of Claiming Age on Benefits
| Claiming Age | Adjustment | Monthly Benefit | Annual Benefit | Cumulative by Age 85 |
|---|---|---|---|---|
| 62 | -30% | $1,750 | $21,000 | $483,000 |
| 63 | -25% | $1,875 | $22,500 | $495,000 |
| 64 | -20% | $2,000 | $24,000 | $504,000 |
| 65 | -13.3% | $2,167 | $26,004 | $520,080 |
| 66 | -6.7% | $2,333 | $27,996 | $531,924 |
| 67 (FRA) | 0% | $2,500 | $30,000 | $540,000 |
| 68 | +8% | $2,700 | $32,400 | $550,800 |
| 69 | +16% | $2,900 | $34,800 | $556,800 |
| 70 | +24% | $3,100 | $37,200 | $558,000 |
When Should You Claim Social Security?
The optimal claiming age depends on your health, financial needs, marital status, and other income sources. Claiming early (age 62) makes sense if you need the income, have health concerns that may limit your lifespan, or can invest the benefits for higher returns. Delaying to age 70 is generally better if you are in good health, have other income sources to bridge the gap, want to maximize survivor benefits for a spouse, or want the highest guaranteed lifetime income.
- 1Claim at 62: $2,200 x 0.70 = $1,540/month ($18,480/year)
- 2Claim at 67: $2,200/month ($26,400/year)
- 3Claim at 70: $2,200 x 1.24 = $2,728/month ($32,736/year)
- 4Break-even age (62 vs. 67): approximately age 78
- 5Break-even age (67 vs. 70): approximately age 82
- 6Cumulative benefits at age 85 claiming at 62: $425,040
- 7Cumulative benefits at age 85 claiming at 70: $490,740
Social Security Strategies for Couples
- Spousal benefits: A spouse can receive up to 50% of the higher earner's PIA at FRA, or their own benefit, whichever is greater
- Survivor benefits: When one spouse dies, the surviving spouse receives the higher of the two benefits
- Higher earner should consider delaying to maximize survivor benefits for the surviving spouse
- The lower earner can claim early while the higher earner delays, providing income while maximizing the larger benefit
- Divorced spouses (married 10+ years) may be eligible for spousal benefits based on the ex-spouse's record
- Spousal benefits are reduced if claimed before the claimant's FRA
Taxes on Social Security Benefits
Understanding Social Security Taxation
Canada Pension Plan (CPP) Comparison
Canada's equivalent to Social Security is the Canada Pension Plan (CPP). The CPP provides a retirement pension based on contributions made during your working years. Like Social Security, you can take CPP as early as age 60 (with a 36% reduction) or as late as age 70 (with a 42% increase). The maximum CPP retirement pension in 2024 is $1,364.60 per month at age 65. Unlike Social Security, CPP benefits are based on contributions (not just earnings), and Canada also has Old Age Security (OAS), a universal benefit for Canadians aged 65+ with sufficient residency. The OAS clawback begins at about $90,000 in individual net income.
The Social Security Trust Fund is projected to be depleted around 2035, after which incoming payroll taxes would cover approximately 80% of promised benefits. While Congress is expected to address this before then, potential changes could include increased taxes, higher retirement ages, or benefit adjustments. Plan conservatively by not relying solely on Social Security for retirement income.