Most people start thinking seriously about retirement with one nagging question: how much money is enough? The answer is rarely a single number. It depends on where you live, how you want to spend your days after work, and how much you earned before you stopped. Still, researchers, financial planners, and pension regulators around the world have spent years trying to pin down a useful benchmark, and their findings offer a clearer picture than most people expect.
What Is an Income Replacement Rate?
Financial experts usually measure retirement needs with a figure called the income replacement rate. It is simply the percentage of your pre-retirement income you need each year once you stop working. If you earned 10 million rupiah a month before retiring and need 7 million to maintain your lifestyle, your replacement rate is 70 percent.
The concept is simple, but the number it produces is not universal. Pension income, savings withdrawals, and any part-time work all count toward the total, and the rate you need depends heavily on your personal circumstances.
The Global Benchmark
The Organisation for Economic Co-operation and Development (OECD) reports a global average replacement rate of about 63 percent as of 2025. That means that, across member and partner countries, public and mandatory pension systems typically replace a little under two-thirds of earnings. However, the spread is wide. Some countries provide rates well below that average, while others, particularly those with generous state pensions, reach around 90 percent or higher.
This matters because the rate a government pension covers tells you how much you must make up yourself. In a country where the state replaces 90 percent of income, you may need relatively little private saving. In a country where the state covers only a third, the gap is much larger.
What Savers Actually Aim For
Surveys of what people think they need reveal a different story. A Schroders Global Investor Study, based on responses from more than 22,000 investors across 30 countries, found that people approaching retirement globally were aiming to replace about 74 percent of their salary. The study is several years old, so its exact figures should be read as a snapshot rather than a current reading. Still, its headline finding has been echoed in later research: expectations vary sharply by country.
The same study noted that some non-retired investors, including those in Poland and Indonesia, believed they would need more than 100 percent of their salary to live comfortably. That expectation may reflect rising living costs, uncertain pension systems, or simple caution, but it shows how differently people in different economies think about security in later life.
Goldman Sachs’ 2025 Retirement Survey tells a more nuanced American story. Working Americans said they targeted an average replacement rate of about 57 percent. Actual retirees, however, reported receiving roughly 60 percent of their former income and expressed high satisfaction, around 82 percent. The gap suggests that many workers may be underestimating what they will need, or that their spending naturally falls once they stop commuting, paying into retirement plans, and covering work expenses.
Why the Rule of Thumb Can Mislead
For years, the financial industry has used 70 to 80 percent as a rough guide. It is a convenient starting point, but a Government Accountability Office review of 59 studies and reports found that recommended target rates typically ranged from 70 to 85 percent. That wide range shows how little consensus exists even among experts.
The rule of thumb can mislead for several reasons. Lower-income households often need a higher share of their earnings because a larger portion of their budget goes to essentials such as food, housing, and healthcare. Higher earners, by contrast, tend to save more during their working years, pay more tax, and have more discretionary income that can shrink in retirement. J.P. Morgan’s retirement research, for example, has estimated that households earning around 300,000 US dollars a year may need only about 55 percent of their pre-retirement income.
Taxes and work costs matter too. Once you stop working, you usually stop paying for commuting, work clothes, and some payroll contributions. Depending on your tax bracket in retirement, you may also owe less income tax. These savings can lower the replacement rate you actually need, sometimes substantially.
The Hidden Risk: Inflation and Longevity
Even if your replacement rate looks adequate on paper, two forces can quietly erode it. The first is inflation. A pension that seems generous today may buy far less after 20 years of rising prices. The second is longevity. People are living longer, which means savings must stretch across a longer period. A retirement that lasts 25 or 30 years requires a very different plan than one that lasts 12.
Research from the Netherlands’ Netspar network has warned that in many countries, realised replacement rates may fall short of what retirees need to keep their living standard. The reason is partly that costs can rise faster than pensions are indexed, and partly that people underestimate how long they will live.
So, How Much Do You Really Need?
The honest answer is that most people will need somewhere between 60 and 80 percent of their pre-retirement income, with lower earners and those in countries with weaker public pensions often needing more. Someone with a modest salary, substantial rent, and little state support may need to aim near the top of that range or beyond. Someone with a comfortable income, a paid-off home, and a generous public pension may get by with considerably less.
A practical way to find your own number starts with your current spending rather than your salary. List what you spend in a typical month, remove costs that will disappear after you retire, and add expenses you expect to rise, such as healthcare and travel. Then compare that figure with what your pensions, savings, and other sources are likely to provide. The difference is your savings target.
Financial planners often suggest reviewing this calculation every few years, since inflation, tax rules, and personal circumstances all change. Starting early helps too. Because of compound growth, a modest monthly contribution started in your twenties can do more over time than a larger one started in your fifties.
There is no single global figure that tells every worker how much retirement income they need. The research points to a practical range of roughly 60 to 80 percent of pre-retirement income for most people, but the right number depends on your country, your earnings, your expected lifestyle, and how long you plan to live. The most useful step is not to chase a universal target but to estimate your own spending, understand what the state will provide, and close the gap early enough for time to work in your favour.
