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Understanding the Social Security "Tax Torpedo"

Understanding the Social Security "Tax Torpedo"

By
Jake Skelhorn
December 10, 2024

The Social Security "Tax Torpedo" is a phenomenon that surprises many retirees. It occurs when additional income leads to a higher portion of Social Security benefits being taxed, effectively increasing the overall tax rate. Here's an in-depth look at how it works and strategies to avoid it.


How Are Taxes Calculated in Retirement?

In the U.S., we have a progressive tax system for ordinary income, meaning that different portions of your income are taxed at different rates. For example, if you have taxable income of $70,000, your income is taxed as follows:

  • 10% tax rate: The first $11,925 of taxable income (single filers in 2025).
  • 12% tax rate: The next portion of income.
  • 22% tax rate: Taxable income over $44,725.


Your marginal tax rate determines the tax on your next dollar of income, which is critical for planning withdrawals in retirement.

How Social Security Is Taxed

Social Security benefits are taxed based on provisional income, which is calculated as:

  • Adjusted Gross Income (AGI) + non-taxable interest (e.g., municipal bond interest + 50% of Social Security benefits

Based on provisional income, a portion of your Social Security benefits will be taxable:

  • 0% taxable: Provisional income under $25,000 (single filer)
  • 50% taxable: Provisional income between $25,000 and $34,000
  • 85% taxable: Provisional income over $34,000


Example of the Social Security Tax Torpedo

Let’s consider a retiree with the following income sources:

  • $44,000 from IRA withdrawals
  • $36,000 in annual Social Security benefits

The provisional income is calculated as:

  • $44,000 (IRA withdrawals)
    • $18,000 (50% of Social Security)
  • Provisional Income: $62,000

Since this exceeds $34,000, 85% of Social Security benefits become taxable.

The Impact of Additional Withdrawals

Suppose this retiree needs an extra $1,000 for an emergency expense. They withdraw it from their IRA, assuming it will be taxed at their 22% marginal rate ($220). However, this withdrawal increases their taxable income by $1,850, including $850 more of their Social Security benefits. The actual tax bill increases by $407, creating an effective tax rate of 40.7% on the additional withdrawal.

Why the Tax Torpedo Occurs

The Tax Torpedo happens because additional income causes more of your Social Security benefits to be taxed. Once 85% of your benefits are taxable, further income is taxed only at your marginal rate, but reaching that point can result in unexpectedly high taxes.

Strategies to Avoid or Minimize the Tax Torpedo

1. Roth Conversions

Converting funds from a traditional IRA or 401(k) to a Roth IRA early in retirement can help. Since Roth withdrawals are tax-free, they won’t increase your provisional income. This strategy is especially effective before claiming Social Security benefits.

2. Build a Taxable Brokerage Account

Investing in a taxable brokerage account creates a source of funds subject to capital gains tax rather than ordinary income tax. This diversifies your income sources and reduces the impact on provisional income.

3. Delay Claiming Social Security

Delaying Social Security benefits until age 70 increases your monthly payments and allows you to spend down pre-tax accounts earlier. This reduces Required Minimum Distributions (RMDs) later, which can otherwise push you into higher tax brackets.

4. Plan Withdrawals Strategically

Work with a financial advisor to determine the optimal sequence for withdrawals. Combining withdrawals from taxable, tax-deferred, and tax-free accounts can help you stay within lower tax brackets.

Key Takeaways

  • The Social Security Tax Torpedo results from the progressive taxation of Social Security benefits.
  • Understanding provisional income and tax brackets is crucial for effective retirement planning.
  • Strategies like Roth conversions, taxable brokerage accounts, and delaying Social Security can significantly reduce tax burdens.

Final Thoughts

Navigating taxes in retirement requires careful planning. By understanding the Tax Torpedo and employing these strategies, you can keep more of your hard-earned money. For more insights, subscribe to our channel or consult a certified financial planner.

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