What Is a Good Savings Rate? The Number That Matters More Than Your Returns
Most people focus on finding better investments. The research says savings rate is the bigger lever — especially in the first decade. Here’s what a good rate actually looks like, what the data from millionaire households shows, and how to build toward it.
Your savings rate — the percentage of your income you save and invest — is more important than your investment returns, especially in the first 10 to 15 years of building wealth. A 1% improvement in annual investment returns adds roughly $7,000 to a $100,000 portfolio over 10 years. A 5 percentage point increase in savings rate, on the same income, adds considerably more — and it compounds from a larger base for the rest of your life.
The math most people haven’t run
Consider two people, both starting with nothing and earning $70,000 per year. Person A saves 10% of income ($7,000/year) and earns 8% annual returns. Person B saves 20% of income ($14,000/year) and earns 7% annual returns — a full percentage point less. After 30 years, Person A has roughly $778,000. Person B has roughly $1.34 million. The person with the lower return rate and higher savings rate ends up 72% wealthier.
This is not an edge case or a carefully chosen example. It reflects a fundamental mathematical reality: in the accumulation phase of wealth-building, the amount going into the account matters more than the rate at which it grows. This changes later — after 20 or 30 years, a large portfolio’s return rate becomes the dominant factor. But in the first decade, when most people are making foundational decisions, savings rate is the primary lever.
The median American saves 7% of income. That’s enough to contribute to a 401(k) and accumulate something over a 40-year career — but not enough to build significant financial flexibility or retire meaningfully early. The research on high-net-worth households consistently shows savings rates of 20% or more, often sustained over decades.
What different savings rates actually produce
The years-to-financial-independence table
JL Collins’s The Simple Path to Wealth and the broader FIRE research community have produced a remarkably clean relationship between savings rate and years to financial independence. The table below assumes a 7% real return and the 25x annual expenses target (more on that in our retirement number post).
These numbers assume you’re starting from scratch at each age, which most people aren’t. The main value of the table is showing how dramatically the relationship bends: moving from a 10% to a 20% savings rate cuts your timeline by 8 years. Moving from 20% to 50% cuts it by another 15. The marginal impact of each additional percentage point is much larger than most people intuit.
The PAW framework from The Millionaire Next Door
Stanley and Danko spent two decades studying high-net-worth American households and found that the most reliable predictor of wealth accumulation was not income, investment selection, or inheritance — it was savings rate as a proportion of income, sustained over time.
Their PAW formula: multiply your age by your annual pre-tax household income, divide by 10. That’s your expected net worth if you’re on a wealth-building trajectory. People consistently above this number are PAWs (Prodigious Accumulators of Wealth). People consistently below are UAWs (Under-Accumulators of Wealth). The formula isn’t a precise target — it’s a benchmark for whether your savings behavior is appropriate for your income and age.
The median millionaire in their study saved 20% or more of income throughout their career. Not in good years only — consistently. And most of them lived well below their means: the typical millionaire household spent 7% of their net worth annually, compared to the UAW pattern of spending close to 100% of income each year.
The practical path from wherever you are
The answer to “what is a good savings rate?” is context-dependent. For someone in their early 20s just starting out: 15% is the minimum, 20% is strong, 25–30% sets you up for genuine financial flexibility in your 40s. For someone in their 30s catching up: 25–30% becomes more important. For someone pursuing FI: 40–50% is the functional target.
The more useful question is not what the target rate is but how to build toward it. Savings rate is primarily a fixed-cost problem — most people can’t meaningfully raise their savings rate without either increasing income or reducing their largest fixed expenses, usually housing.
Stanley and Danko found that the most reliable predictor of high net worth was not income level — it was savings rate as a percentage of income, sustained over a long period. Households earning $80,000 who saved 25% consistently outperformed households earning $200,000 who saved 8%.
15% is the minimum. 20–25% builds real wealth. More than that changes your timeline dramatically.
There is no single right savings rate — it depends on when you started, what you earn, what your fixed costs are, and what financial freedom means to you. But the data from millionaire households and the FI research community is consistent: most people who achieve significant financial flexibility save 20–30% or more of income, sustained over time, regardless of income level.
The 15% conventional wisdom is a useful starting point for people in their 20s who want to retire around 65. It is not a wealth-building target. If you want more than a conventional retirement — earlier, more secure, more flexibility — the savings rate has to be higher, and the most reliable way to get there is automation plus the discipline to save raises before spending them.