What Women Need to Know About the 110 Investing Rule
If you’re a woman planning for retirement, or working toward making work optional, one question eventually rises to the top: How much risk should I actually be taking with my investments?
Too much risk and market downturns can derail your confidence. Too little risk and your money may not grow fast enough to support your future. Somewhere in the middle is balance.
One of the most widely cited guidelines for striking that balance is something known as the 110 rule, a simple formula designed to help investors adjust their stock and bond allocation as they age.
But is it still relevant? Was it created for a very different economic era? And does it make sense for single women building wealth on their own?
What Is the 110 Rule?
The 110 rule is a general investing guideline where you subtract your age from 110. The result is the percentage of your portfolio that should be invested in stocks. The remainder should be in bonds (or other lower-risk investments).
For example:
- Age 30 → 110 – 30 = 80% stocks / 20% bonds
- Age 45 → 110 – 45 = 65% stocks / 35% bonds
- Age 60 → 110 – 60 = 50% stocks / 50% bonds
The idea is simple:
- When you’re younger, you can take on more stock market risk.
- As you age, you gradually shift toward more stability and income.
This formula is often referenced in financial planning circles and popularized through investment literature and retirement planning frameworks over the past several decades.
Where Did This Rule Come From?
The concept originally began as the “100 minus your age” rule. Historically, financial planners would suggest subtracting your age from 100 to determine your stock allocation. Over time, as life expectancy increased and interest rates declined, some advisors began adjusting the number upward, first to 110, and sometimes even 120.
Why? Because Americans are living longer, especially women.
According to the Social Security Administration’s 2023 Trustees Report, a 65-year-old woman today is expected to live, on average, to approximately age 86, and many live well into their 90s.
Longer lifespans mean longer retirements, more years your money needs to grow and greater exposure to inflation risk That extended timeline makes a higher stock allocation potentially necessary.
Why Does This Rule Exist?
The 110 rule exists to address two competing risks:
- Market risk (short-term volatility from stocks)
- Longevity and inflation risk (running out of money over time)
Historically, stocks have outperformed bonds over long periods.
According to data from Ibbotson Associates (now part of Morningstar), U.S. large-cap stocks have returned approximately 10% annually on average over the long term, while long-term government bonds have returned closer to 5-6% over extended historical periods.
Stocks provide growth. Bonds provide stability. The 110 rule attempts to balance those two forces over time.
Who Typically Recommends the 110 Rule?
The 110 rule is most often referenced by traditional financial planners, retirement planning educators, target-date fund designers and personal finance authors.
Many target-date retirement funds, like those offered in 401(k) plans, automatically adjust allocations over time in a way that loosely resembles this age-based glide path approach.
For investors who want a simple, low-maintenance strategy, the rule can offer a helpful starting point.
Why It May Not Fit Every Investor Today
Here’s where nuance matters. The 110 rule was built during an era when:
- Bond yields were higher
- Pension plans were more common
- Life expectancies were shorter
- Fewer women were primary breadwinners
Today’s economic landscape looks different.
1. Lower Bond Yields
For much of the 2010s, bond yields were historically low. Lower yields mean bonds may provide less income than in prior decades.
2. Longer Working Lives
Many women today are choosing to work longer, or pursue phased retirement, especially in the context of making work optional rather than stopping entirely at 65.
3. Increased Longevity for Women
Women statistically outlive men, according to U.S. Census Bureau and Social Security Administration data. That longer timeline means growth remains important even later in life.
4. Market Volatility Is Higher (Psychologically)
While volatility has always existed, 24-hour financial news and app-based investing amplify emotional reactions. Your risk tolerance today is influenced not just by math, but by how you emotionally respond to headlines.
Pros of Following the 110 Rule
There’s a reason this rule has endured.
Simplicity
It’s easy to calculate. No complex modeling required.
Encourages Gradual De-Risking
As you age, it naturally reduces exposure to market swings.
Protects Against Sequence-of-Returns Risk
Reducing stock exposure near retirement can protect against major losses just before or after retirement, what planners call sequence-of-returns risk.
Good Starting Point for Beginners
If you’re new to investing, it prevents analysis paralysis.
Cons and Drawbacks of the 110 Rule
However, there are limitations.
It Ignores Personal Risk Tolerance
Two 50-year-old women may have very different emotional responses to market volatility.
It Doesn’t Account for Other Income Sources
If you expect:
- Social Security
- Rental income
- A pension
- Part-time income
Your need for bond stability may differ.
It May Be Too Conservative for Some
If you plan to retire early, say at 55, you may need continued growth well into your 70s and 80s.
It Assumes Retirement at a Traditional Age
The rule assumes a standard retirement timeline. For women designing a work-optional life at 45 or 50, that math changes.
When the 110 Rule Makes Sense
The 110 rule can be useful if:
- You want a simple framework
- You prefer a hands-off strategy
- You feel anxious during market downturns
- You plan to retire at a traditional age (62 to 67)
- You don’t want to actively manage allocations
It provides structure and prevents extreme overexposure to stocks later in life.
When It May Not Be Ideal
You may need a more customized approach if:
- You are planning early financial independence
- You have high guaranteed income (like a pension)
- You have very high risk tolerance
- You have significant wealth beyond retirement accounts
- You’re comfortable managing volatility
Single women pursuing work optional status in their 40s or early 50s often need a strategy that blends growth and income more flexibly.
Understanding Risk Tolerance (Beyond Age)
Age is only one factor in investment risk. True risk tolerance includes:
1. Emotional Risk Tolerance
How do you feel when the market drops 20%? According to Dalbar’s Quantitative Analysis of Investor Behavior, investor returns often underperform market returns due to emotional buying and selling during volatility. If you panic-sell during downturns, a lower stock allocation may serve you better, even if you’re young.
2. Financial Capacity for Risk
Do you have a strong emergency fund, a stable income and no high-interest debt? The stronger your financial foundation, the more capacity you may have to tolerate volatility.
3. Time Horizon
If you plan to make work optional at 50 but still expect to live into your 90s, your investment timeline may be 40+ years. Time horizon often matters more than chronological age.
A Modern Perspective for Women Building Wealth
For single women especially, there’s a balancing act. You are your own safety net. But you also need growth to keep up with inflation, healthcare costs and longer lifespans.
The U.S. Bureau of Labor Statistics reports that healthcare costs tend to rise faster than general inflation over time, which makes growth-oriented investments critical over multi-decade retirements. Being overly conservative too early can quietly sabotage your long-term independence.
How to Strike the Right Portfolio Balance
Instead of blindly applying 110 minus your age, consider this framework:
Step 1: Clarify Your Timeline
When do you want work to become optional?
Step 2: Define Your Required Growth Rate
How much growth do you need to reach your retirement number?
Step 3: Stress-Test Your Allocation
Could you tolerate a 20-30% market drop without selling?
Step 4: Revisit Annually
Your allocation should evolve, but it doesn’t need to change monthly.
Step 5: Consider a Hybrid Approach
Some women use:
- 110 rule as a baseline
- Then adjust +/- 10% based on comfort and goals
For example:
At age 45, 110 rule suggests 65% stocks.
If you’re growth-oriented and early retirement-focused, maybe 70-75% makes sense.
If volatility stresses you deeply, maybe 60% is better.
Personalization beats rigid rules.
Is the 110 Rule for Me?
The 110 rule isn’t wrong. It’s just incomplete. It was designed as a guide, not a commandment. For women building wealth independently and designing a work-optional future, your investment allocation should reflect:
- Your timeline
- Your income stability
- Your emotional tolerance
- Your retirement goals
- Your longevity expectations
A rule can guide you. But only you can decide what balance feels aligned with both your future security and your present peace of mind.
You don’t need to memorize formulas. You need clarity. Your investment portfolio should support your goal of making work optional, not keep you awake at night.
Growth and security aren’t opposites. With the right balance, they work together.
Q&A: The 110 Rule Explained
What is the 110 rule in investing?
It’s a guideline suggesting you subtract your age from 110 to determine the percentage of your portfolio that should be in stocks, with the remainder in bonds.
Where did the 110 rule come from?
It evolved from the older “100 minus your age” rule as life expectancy increased and investors needed more growth over longer retirements.
Is the 110 rule still relevant today?
It can be a useful starting point, but it may not fit investors pursuing early retirement or those with unique income sources.
Is the 110 rule good for women?
It can be helpful, especially for those seeking simplicity. However, women who live longer or plan early financial independence may need more growth-oriented allocations.
Should I follow the 110 rule exactly?
Not necessarily. It’s best used as a baseline and adjusted based on your personal risk tolerance, timeline, and financial goals.
What matters more than age when setting investment risk?
Time horizon, emotional tolerance for volatility, income stability and retirement goals often matter more than age alone.
Want to learn how to hit the right investment mix for you? Get our Make Work Optional in 5 Days guide, a step-by-step blueprint for the modern single woman to design the financial future of her dreams. No jargon. No fluff. Just your roadmap to financial freedom and making work strictly optional.
Last Updated: 2026
