The Three Numbers That Actually Tell You If You Are Ready to Retire

The One-Number Trap

Nearly every retirement article you have ever read boils down to a single question: do you have enough saved? The financial industry has spent decades training people to fixate on a target balance -- $1 million, $1.5 million, $2 million -- as though hitting a number is the same as being ready.

It is not. A person with $1.2 million saved and $120,000 in annual spending is in a completely different position than someone with $1.2 million saved and $55,000 in annual spending. The balance is the same. The readiness is not even close.

The problem with the one-number approach is that it treats retirement readiness like a finish line you cross. In reality, readiness is a relationship between three numbers, and you need all three to know where you stand.

Number One: What You Actually Spend

This is the number most people skip, and it is the most important one. Your annual spending -- not your income, not your savings, but what actually goes out the door each year -- is the foundation of every retirement calculation.

If you do not know what you spend, you cannot know what you need. It is that simple. And yet, according to a 2025 retirement survey by Schroders, more than half of Gen Xers -- the generation closest to retirement -- have never estimated their expenses in retirement or determined how much income they will need to generate.

Your spending number does not need to be exact to the penny. It needs to be honest. Start with your take-home pay, subtract what you save each month, and the remainder is roughly what you spend. Or add up your fixed expenses (housing, insurance, debt payments, utilities) and layer on your variable spending (groceries, transportation, dining, entertainment). Either way, you end up with a number that most people have never actually written down.

This number matters because it is the denominator in every retirement equation. How long your money lasts is not determined by how much you saved. It is determined by how much you saved divided by how much you spend. A $800,000 portfolio supporting $40,000 in annual spending will likely last longer than a $1.5 million portfolio supporting $110,000 in annual spending. The math does not care about the headline number.

Number Two: What You Are Saving Each Year

Your savings rate -- the percentage of your income that goes toward retirement and other long-term goals -- is the lever you have the most control over. It tells you how fast your portfolio is growing and, just as importantly, it reflects how much of your income you have learned to live without.

A high savings rate does two things at once. First, it adds directly to your portfolio. Second, and less obviously, it signals that your spending is lower relative to your income, which means you need less in retirement to maintain your lifestyle. Someone saving 25% of their income is simultaneously building a larger portfolio and proving they can live on less.

The commonly cited target is to save 15% of gross income for retirement, including any employer match. But that number is a starting point, not a rule. If you are 50 and behind on savings, you may need 20% or more. If you started saving in your 20s and have a paid-off house, 10% might be enough. The right savings rate depends entirely on your spending and your timeline.

What matters is that you know the number and that you are tracking it. If you have a budget but have not calculated your savings rate, you have the ingredients but not the recipe.

Number Three: Your Projected Portfolio at Retirement

This is the number that ties the first two together. Take your current retirement savings (401(k), IRA, brokerage accounts, other investments), add your annual contributions, apply a reasonable assumed rate of return, and project the total forward to your planned retirement age. That projected balance is the third number.

On its own, this number is just as misleading as the one-number targets you see in articles. $1.2 million sounds like a lot until you divide it by 30 years of spending. But when you combine it with your annual spending (Number One) and your savings rate (Number Two), you get a picture that actually means something.

The simplest way to test retirement readiness with these three numbers is to compare your projected portfolio to the total spending it needs to support. If you expect to spend $50,000 per year in retirement and you plan to retire for 30 years, you need your portfolio to cover roughly $1.5 million in spending (adjusted for inflation, investment returns during retirement, and Social Security or pension income). If your projected portfolio gets you there, you are on track. If it falls short, one of the three numbers needs to change: you spend less, you save more, or you work longer.

Why These Three Numbers Work Together

The reason the financial industry defaults to a single savings target is that it is easy to communicate. "Save $1 million" fits on a billboard. "Know your spending, calculate your savings rate, and project your portfolio forward under realistic assumptions" does not.

But the three-number approach is how actual financial planning works. Every financial planner who sits down with a client runs some version of this calculation. They look at spending, they look at savings, and they project forward. The only difference between what a planner does and what you can do yourself is the tool you use to connect the three.

Here is what each number tells you on its own, and what it tells you in combination:

Spending alone tells you what your lifestyle costs. Useful, but it does not tell you if you can sustain it.

Savings rate alone tells you that you are putting money away. Useful, but it does not tell you if the pace is enough.

Projected portfolio alone tells you a dollar amount. Useful, but it does not tell you how far that amount goes.

All three together tell you: given what I spend, what I am saving, and where my portfolio is headed, will I be okay? That is the question. And these three numbers, together, are the answer.

How to Calculate Your Three Numbers

If you have never done this exercise, here is how to start:

Step 1: Build a budget. List your monthly income after taxes. List your fixed and variable expenses. The difference between income and total expenses is what you have available for savings. Multiply your monthly spending by 12 to get your annual spending number. This is Number One.

Step 2: Calculate your savings rate. Add up all the money going toward long-term savings and retirement each month -- 401(k) contributions (including employer match), IRA contributions, brokerage deposits, emergency fund contributions. Divide that by your gross monthly income. Multiply by 100. That percentage is Number Two.

Step 3: Project your portfolio. Take your current total retirement savings. Add your annual contributions. Apply an assumed annual return (6-7% is commonly used for a diversified portfolio over long periods, though actual returns will vary). Run that forward to your target retirement age. The resulting balance is Number Three.

Step 4: Test the result. Take your projected portfolio (Number Three) and compare it to your projected retirement spending. If your portfolio, combined with Social Security or any pension income, can sustain your spending for 25-30 years, you are in a strong position. If it cannot, you now know exactly which lever to pull -- reduce spending, increase savings, or adjust your timeline.

This is not complicated math. It requires a budget, a savings calculation, and a projection tool. The hardest part is sitting down and doing it, because once you see the numbers, you have to reckon with what they say.

What Most People Find When They Run the Numbers

For many people, especially those in their 40s and 50s who have never done this exercise, the result is not as dire as they feared. The anxiety around retirement often comes from not knowing -- from staring at a 401(k) balance and wondering if it is enough without any framework for answering the question.

The three-number approach replaces anxiety with clarity. Sometimes the answer is "you are closer than you think." Sometimes it is "you have a gap to close." But either way, you have a specific, actionable picture instead of a vague sense of dread.

The goal is not to hit a perfect number. It is to understand the relationship between what you spend, what you save, and where that puts you. Once you see that relationship clearly, every financial decision you make -- from your next raise to your next major purchase -- has a context it did not have before.