The Social Security Rule That Surprises Retirees Every Year - And Could Cost You Money

When prices rise, the Social Security Administration (SSA) usually makes changes that help both workers and retirees.

But there is at least one instance where Social Security does not adjust for inflation, and that fact makes it difficult to stretch your retirement dollars further.

How Social Security responds to inflation

In most cases, the Social Security program makes helpful changes when inflation spikes. For example, retirees gain from annual cost-of-living adjustments (COLA) that increase their benefits to keep pace with inflation.

In addition, those who are enrolled in Social Security but who also continue to work see the earnings limit rise. This means that if they are below full retirement age, they are able to earn more on the job before they are at risk of having some of their Social Security benefit withheld.

However, there is one important area where Social Security does not adjust for inflation.

Social Security taxation thresholds do not change

Since the 1980s and 1990s, the thresholds for when Social Security benefits become taxable have never budged an inch to account for inflation. Since 1984, the thresholds for paying taxes on up to 50% of your Social Security benefits have remained at $25,000 for single filers and $32,000 for married couples filing jointly.

Since 1993, the thresholds for paying taxes on up to 85% of your Social Security benefits have remained at $34,000 for single filers and $44,000 for married couples filing jointly. As the decades have passed, the lack of inflation adjustment to these thresholds has meant that more Social Security income has become subject to taxation.

For some perspective, $25,000 in 1984 is equivalent to about $78,000 today. That means that if the thresholds for taxation had been regularly adjusted to account for inflation over the past four decades, millions fewer people would be subject to taxation of their Social Security benefits.

How the government calculates Social Security taxation

The IRS looks at your combined income to determine whether Social Security benefits are taxed.

Combined income includes:

• Adjusted gross income
• Nontaxable interest
• 50% of your Social Security benefit

Once your income crosses the first set of thresholds mentioned earlier, $25,000 for single filers and $32,000 for married couples filing, up to 50% of benefits become taxable. At the higher thresholds of $34,000 for single filers and $44,000 for married couples filing jointly, up to 85% of benefits become taxable.

How Social Security taxation has gotten worse

The percentage of Social Security beneficiaries who see their benefits taxed has grown dramatically over the past few decades.

When the thresholds were first put into place, fewer than 10% of retirees owed any taxes on their benefits, according to The Senior Citizens League. Jump ahead to as recently as 2018, when nearly half of recipients faced taxation.

The number of seniors facing such taxation potentially grows every time a senior receives a COLA or dips a little deeper into their 401(k) to make a withdrawal.

Why taxation of Social Security benefits matters

Taxation of Social Security benefits has a big impact on retirees who depend on Social Security to help make ends meet.

A 2025 Transamerica Center for Retirement Studies survey found that 53% of retirees say Social Security is their primary source of income during their golden years.

When taxation of Social Security benefits began in the 1980s, it mostly impacted well-to-do retirees. But the lack of inflation adjustments has meant that many folks who truly count on Social Security just to get by have had to pay taxes on that income. At least until recently.

A temporary taxation reprieve

In 2025, the One Big Beautiful Bill Act (OBBBA) became law. As part of that legislation, a new enhanced senior income tax deduction was introduced for those who are 65 or older. For the years 2025 to 2028, seniors are entitled to an enhanced senior deduction of up to $6,000 for individuals and up to $12,000 for married couples. This is on top of their existing standard deduction.

The real-world impact of these enhanced deductions is that millions of seniors no longer pay taxes on their Social Security benefits. By some estimates, nearly 90% of seniors no longer see their benefits taxed.

However, other seniors still pay such taxes. And the expanded deduction is slated to expire after 2028, meaning millions once again face possible taxation in the future unless the enhanced deduction is extended.

Making sure you don't pay taxes on Social Security benefits

Fortunately, there are ways to avoid taxation of Social Security benefits regardless of whether the enhanced senior income tax deduction is extended beyond 2028.

One of the best ways to avoid taxation in the future is to put money into Roth accounts before you retire. Distributions from a Roth 401(k) or Roth IRA do not count toward provisional income. This allows you to use well-planned withdrawals from these accounts to stay below the taxation thresholds.

If you are still in the accumulation phase of building wealth, it's worth considering making contributions to Roth accounts now so you have more flexibility in retirement. However, this strategy is not right for everyone. So, consult with a financial advisor to determine the right path forward for you.

Bottom line

Millions of retirees are doing better financially thanks to the enhanced senior income tax deduction that makes taxation of Social Security benefits less common.

However, this provision is temporary, and there is no guarantee of an extension into the future.

So, if you are still working today, consider putting a strategy into place that helps you avoid taxation of Social Security benefits regardless of which way the political winds blow.