Your Social Security Might Be Smaller Than You Think: Here’s What’s Cutting Into It

Most retirees rely on Social Security to help cover their expenses, but many are surprised to find their benefits don’t stretch nearly as far as they planned. Before you finalize your retirement budget, it’s worth understanding the key forces that can quietly shrink your monthly check.

1. You may have to retire sooner than planned

Your Social Security benefit is calculated using your average wages across 35 years of work history, adjusted for the age at which you claim. Both variables matter far more than most people appreciate until it’s too late to change them.

Workers who leave the workforce earlier than expected often don’t have 35 strong earning years on record. Because wages typically peak in the final decade of a career, an early exit forces lower-wage years from early in working life into the average, dragging the benefit calculation down. The Social Security Administration fills any missing years with zeros, which makes the math even less forgiving.

Claiming early compounds the damage. Benefits shrink for every month you claim before your full retirement age, and filing at 62 instead of waiting can cut your standard benefit by as much as 30%. Health problems, a layoff, or caregiving responsibilities that force an unplanned exit from the workforce can translate into a financial penalty that lasts for the rest of your life.

2. You may be taxed on your Social Security income

Even after you start collecting, you may not get to keep everything. Both the federal government and some states can take a cut, and the rules have shifted considerably in recent years.

At the federal level, taxes on Social Security benefits kick in once your combined income reaches $25,000 as a single filer or $32,000 as a married joint filer. Up to 50% of benefits can be taxed within those lower income bands, and up to 85% for higher earners. Those thresholds have never been adjusted for inflation, so a growing share of retirees has crossed them over time, even though the tax was originally designed to reach only the country’s top earners.

The federal picture changed with the One Big Beautiful Bill Act, signed into law on July 4, 2025. The law does not eliminate the Social Security tax, but it introduced a new $6,000 per-person deduction for taxpayers aged 65 and older, covering tax years 2025 through 2028. Married couples where both spouses qualify can claim up to $12,000 combined, and the deduction stacks on top of the existing standard deduction. According to a White House Council of Economic Advisers analysis, the result is that roughly 88% of seniors receiving Social Security income will owe no federal tax on those benefits, up sharply from the 64% who were already off the hook under prior law. The deduction phases out at a 6% rate for incomes above $75,000 for single filers and $150,000 for joint filers, and disappears entirely at $175,000 for singles and $250,000 for joint filers. The provision is also temporary: it expires after 2028 without further congressional action.

State taxation is a separate matter. As of 2026, eight states still tax Social Security income to some degree: Colorado, Connecticut, Minnesota, Montana, New Mexico, Rhode Island, Utah, and Vermont. West Virginia completed a multi-year phase-out in 2026, trimming the list from nine states. Most of the remaining eight offer income-based exemptions, so not every resident will owe, but the rules vary widely and are worth checking before you choose where to retire.

3. The buying power of your benefits may erode

Perhaps the most insidious threat to Social Security income is one that unfolds gradually and largely out of sight: inflation outpacing the cost-of-living adjustments that are supposed to protect benefits.

According to the Senior Citizens League’s 2026 Loss of Buying Power report, the average Social Security payment has lost approximately 13.7% of its purchasing power since 2016, even after accounting for annual COLAs. In practical terms, benefits in 2026 are worth roughly 83.6 cents on the dollar compared to their 2016 value. The 2026 COLA came in at 2.8%, a modest step up from the 2.5% adjustment that took effect at the start of 2025, yet advocates argue that even a string of increases does little to offset a decade of cumulative losses. Looking ahead, current estimates for the 2027 COLA range from about 3.4% to 3.6%, according to projections from the Senior Citizens League and independent analysts, but a higher adjustment would still leave that gap intact.

The problem is structural. COLAs are tied to the Consumer Price Index for Urban Wage Earners and Clerical Workers, a benchmark that tracks the spending habits of working-age Americans rather than retirees. Because seniors spend a disproportionate share of their budgets on healthcare and housing, two categories that tend to rise faster than the broader index, the formula consistently underestimates the inflation they actually face.

Medicare Part B premiums add another direct drag. Most beneficiaries over 65 have those premiums deducted from their Social Security checks before the money ever arrives. The standard premium was $185.00 per month in 2025, and the 2026 rate rose to $202.90, an increase of $17.90 or about 9.7%. That single jump consumed a meaningful portion of the 2026 COLA for millions of retirees.

Taken together, these three forces mean Social Security is likely to provide less financial support than many people count on. Building a retirement income plan with diversified sources, and revisiting that plan as the rules evolve, remains one of the most important steps toward protecting your standard of living in later years.

Editor’s note: This pass added current 2027 COLA projections of 3.4% to 3.6% (per the Senior Citizens League and CNBC), clarified that the One Big Beautiful Bill Act’s senior deduction stacks on top of the standard deduction, and updated the White House CEA framing to reflect that 88% of seniors will owe no federal tax on Social Security under the new law, with the prior-law baseline of 64% also added for context.

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