How to Calculate My Social Security Benefit: A Guide for Your Retirement Strategy

If you are approaching retirement, you’ve likely spent decades contributing to the Social Security system. But as you get closer to your target retirement date, a critical question emerges: Exactly how much will my monthly check be?

Understanding how to calculate your Social Security benefit is a foundational step in building a robust retirement income plan. At Oak Harvest Financial Group, we help our clients navigate the complexities of Social Security so they can increase their lifetime benefits and protect their wealth.

Here is a straightforward breakdown of how the Social Security Administration (SSA) calculates your monthly check, along with key strategies designed for those with significant retirement assets.

Step 1: Your 35 Highest-Earning Years (AIME)

The SSA doesn’t just look at the salary you make right before you retire; they look at your entire career. Your baseline benefit is calculated using your Average Indexed Monthly Earnings (AIME).

• The 35-Year Rule: The SSA looks at the 35 years where you earned the most money.
• Wage Indexing: Because $50,000 meant a lot more in 1990 than it does today, your past earnings are adjusted (indexed) for inflation and historical wage growth.
• Mind the Gaps: If you worked for fewer than 35 years, the SSA will factor in $0 for those missing years, which can pull down your overall average.

For high earners, it’s important to note that only earnings up to the annual Social Security wage base limit are counted in this calculation.

Step 2: The Primary Insurance Amount (PIA) Formula

Once the SSA determines your average lifetime earnings, they run that number through a specific formula to find your Primary Insurance Amount (PIA). Your PIA is the baseline monthly amount you will receive if you claim benefits exactly at your Full Retirement Age (FRA).

The formula uses thresholds known as “bend points” to determine how much of your pre-retirement income is replaced. For individuals turning 62 in 2026, the SSA replaces:

• 90% of the first $1,286 of your average monthly earnings.
• 32% of earnings between $1,286 and $7,749.
• 15% of any average earnings over $7,749.

This progressive structure means that while higher earners receive larger absolute checks, a lower percentage of their overall pre-retirement income is replaced by Social Security compared to lower-income earners. This highlights why having substantial personal retirement savings is so vital.

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Step 3: Your Claiming Age Changes Everything

Your PIA is just the starting point. The actual dollar amount deposited into your account depends heavily on when you decide to start your benefits.

• Full Retirement Age (FRA): If you were born in 1960 or later, your FRA is 67. Claiming exactly at this age means you receive 100% of your calculated PIA.
• Claiming Early: You can start claiming as early as age 62, but doing so permanently reduces your monthly check by up to 30%.
• Delayed Retirement Credits: If you wait past your FRA, the SSA rewards you. Your benefit increases by a guaranteed 8% for every year you delay, maxing out at age 70. This can result in a 24% permanent boost to your monthly income.

The “Bridge Strategy” for High Earners

For investors who have diligently built substantial 401(k) or IRA balances, you have a unique advantage: the ability to wait. The “Bridge Strategy” involves using withdrawals from your personal investment portfolio to cover your living expenses from the day you retire (for example, at age 60 or 62) until age 70. By bridging this income gap with your own assets, you allow your Social Security benefit to earn that guaranteed 8% annual growth—a powerful, risk-free counterbalance to market volatility.

Spousal and Survivor Strategies

If you are married, coordinating when each spouse claims is essential, particularly if there is a wide gap in your lifetime earnings. Often, it makes strategic sense for the higher-earning spouse to delay their benefit as long as possible. This not only increases the household’s monthly payout while both spouses are living, but it also locks in the highest possible survivor benefit for the remaining spouse—an essential component of legacy planning.

Step 4: Cost-of-Living Adjustments (COLA) and Taxes

To protect your purchasing power throughout your retirement, the SSA applies annual Cost-of-Living Adjustments (COLA) based on inflation (for example, 2026 saw a 2.8% adjustment). These adjustments are factored into your benefit calculation starting at age 62, even if you delay taking your checks until age 70.

A Note on Taxes: For many retirees with significant savings and investments, Social Security isn’t tax-free. Depending on your combined income (which includes your Adjusted Gross Income, non-taxable interest, and half of your Social Security benefits), up to 85% of your Social Security benefits may be subject to federal income tax.

The IRMAA Surcharge Warning

A common blind spot for affluent retirees is the Income-Related Monthly Adjustment Amount, or IRMAA. If your income—often driven up by Required Minimum Distributions (RMDs), capital gains, or large portfolio withdrawals—crosses certain thresholds, you will be subject to an IRMAA surcharge. This surcharge substantially increases your Medicare Part B and Part D premiums. Because these premiums are deducted directly from your Social Security checks, triggering IRMAA effectively shrinks your net monthly benefit.

The Advisor’s Take: “Deciding when to claim Social Security shouldn’t happen in a vacuum. It is a vital piece of the puzzle, but it needs to be coordinated with your tax planning, your portfolio withdrawals, and your legacy goals to truly protect your wealth.” – Troy Sharpe, CFP®, CPWA®, CTS®, Founder and CEO

Build a Strategy, Not Just a Calculation

Social Security was never designed to replace all of your pre-retirement income. It is just one pillar of your overall wealth. Deciding when and how to claim requires looking at the big picture so you can make confident decisions about your financial future.

Ready to see how Social Security fits into your broader retirement plan? Schedule a free visit with us here.