When planning for retirement, most people focus on predictable expenses: housing, food, travel, and health insurance. But new research shows that it’s the unplanned costs — the ones that don’t show up neatly in a budget — that often put the most pressure on retirees.
According to recent research from the Center for Retirement Research at Boston College, more than 8 in 10 retired households — 83% — experience at least one unexpected expense in a given year. Among those households, the average annual surprise cost comes out to roughly $6,000, or about 10% of annual income.
The findings are based on data from more than 3,400 retired households, tracked over two decades through the University of Michigan’s Health and Retirement Study and Consumption and Activities Mail Survey.
The Real Risk: Not Having Cash When You Need It
While unexpected expenses are common, the research highlights a more concerning issue: many retirees lack sufficient cash reserves to handle them.
- About 58% of retired households have enough cash to cover a year of unplanned expenses.
- Roughly 16% would need to dip into retirement accounts like a 401(k) or IRA.
- Another 27% would still fall short — even after using both cash and retirement assets.
Put differently, about 40% of retired households don’t have enough readily available cash to handle even one year of surprise costs, let alone a multi-year retirement.
Related Reading: What to Consider When Funding An Unexpected Expense
What Counts as an “Unexpected” Expense?
The Boston College researchers grouped surprise expenses into three broad categories:
- “Rainy day” expenses: Large, irregular costs such as major car repairs or home maintenance.
- Family-related expenses: Financial help for adult children or grandchildren, or costs following the death of a spouse.
- Health-care expenses: Out-of-pocket medical, dental, or prescription costs not fully covered by insurance.
Over the course of retirement:
- About 60% of households face a rainy-day expense.
- 29% encounter a family-related financial shock.
- 58% experience unexpected health-care costs.
Related: Webinar – How to Manage Health Care Expenses in Retirement
Higher Income Doesn’t Mean Fewer Surprises
Interestingly, higher-income retirees actually experience unexpected expenses more often than lower-income households.
For example, about 80% of households earning $100,000 or more face a rainy-day or health-care shock in a given year, compared with around 45% of households earning under $50,000.
Researchers suggest this reflects spending flexibility — higher-income households often choose to repair, replace, or assist family members rather than delay or avoid expenses.
Rethinking Emergency Savings in Retirement
For working households, emergency savings are often measured in months of expenses. Retirement planning calls for a different lens.
Many financial planners recommend thinking less about a fixed formula and more about access to cash for surprises — especially for health care, home repairs, or family needs.
For some retirees, that may mean keeping roughly one year of core expenses, adjusted for reliable income sources like Social Security or pensions. Others — particularly those with higher medical risk or less predictable income — may need more.
The key goal is flexibility: having enough cash on hand to avoid selling long-term investments at the wrong time, such as during a market downturn.
Related Reading: What to Consider When Establishing and Maintaining an Emergency Fund
The bottom line: Unexpected expenses aren’t the exception in retirement — they’re the norm. Planning for them isn’t about predicting every cost, but about building liquidity into your retirement strategy.
A well-designed retirement plan balances:
- Reliable income sources
- Long-term growth investments
- And sufficient cash reserves to handle life’s surprises
That balance can help retirees stay invested, remain flexible, and avoid making reactive financial decisions when the unexpected inevitably occurs.
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