Social Security is the financial backbone of retirement for most American seniors. This guide explains how benefits work, when to claim, and how 2026 changes affect your check.
How are Social Security benefits calculated?
Social Security calculates your benefit from your highest 35 years of inflation-adjusted earnings. The Social Security Administration averages those years into your Average Indexed Monthly Earnings (AIME), then applies a progressive formula to produce your Primary Insurance Amount (PIA), the benefit you receive at full retirement age. Lower lifetime earners get a higher percentage of their earnings replaced. If you worked fewer than 35 years, the missing years count as zeros, which lowers your average. You generally need 40 work credits (about 10 years of work) to qualify. Your actual check then rises or falls depending on whether you claim before or after full retirement age.
When can you start collecting Social Security?
You can claim Social Security retirement benefits as early as age 62, but doing so permanently reduces your monthly check by up to 30%. Your full retirement age (FRA) is 66 to 67 depending on birth year; for people born in 1960 or later, FRA is 67. Each year you delay past FRA up to age 70 adds about 8% through delayed retirement credits, roughly 24% more if your FRA is 67. There is no benefit to waiting beyond 70. The right age depends on your health, savings, spouse, and whether you are still working. A licensed advocate at 1-800-MEDIGAP can walk you through the tradeoffs free of charge.
How much is the 2026 Social Security COLA?
The Social Security cost-of-living adjustment (COLA) for 2026 is 2.8%, announced by the Social Security Administration in October 2025 and effective with January 2026 payments. The COLA is tied to the Consumer Price Index for Urban Wage Earners (CPI-W) and protects benefits against inflation. For the average retired worker, the 2.8% increase adds roughly $56 per month. The Medicare Part B premium increase is deducted from many seniors' checks, so the net raise is often smaller than the gross COLA. Reviewing your Medicare coverage each year helps you keep more of that raise.
Are Social Security benefits taxable?
Yes, up to 85% of your Social Security benefits can be subject to federal income tax, depending on your combined income (adjusted gross income plus nontaxable interest plus half your benefits). Individuals with combined income above $25,000, or couples above $32,000, may owe tax on a portion of benefits; above $34,000 (individual) or $44,000 (couple), up to 85% is taxable. These thresholds are not indexed for inflation, so more seniors owe tax over time. A handful of states also tax benefits. Tax planning around when you claim and how you draw other income can meaningfully reduce what you owe.
How does Social Security work with Medicare?
Social Security and Medicare are linked but separate programs. If you already receive Social Security when you turn 65, you are automatically enrolled in Medicare Part A and Part B, and your Part B premium is deducted from your benefit check. If you have not yet claimed Social Security, you must enroll in Medicare yourself during your Initial Enrollment Period to avoid lifelong late penalties. Original Medicare leaves gaps, deductibles, copays, and no out-of-pocket cap, which a Medigap (Medicare Supplement) plan is designed to fill. Call 1-800-MEDIGAP to compare Medigap options alongside your Social Security claiming decision.