There is no universal percentage of your money that belongs in cash. Keep enough outside the stock market to cover emergencies and expenses you expect soon, then decide separately whether a cash allocation inside your long-term portfolio fits your goal, time horizon and tolerance for loss. A useful starting point is three to six months of essential living expenses for an emergency reserve—not three to six months of your portfolio and not a rule that applies identically to every household.
Start by giving each dollar one job
“Cash outside the market” can describe several different decisions. Emergency savings protect you from an income shock. Near-term spending money pays for known bills and purchases. A cash allocation inside an investment portfolio is a deliberate choice to hold a low-risk asset instead of stocks or bonds. Combining these jobs creates bad targets: money needed for rent next month should not be invested for growth, while money for a retirement goal decades away may lose purchasing power if it sits in cash indefinitely.
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Investor.gov uses the familiar phrase “Save for a Rainy Day” when discussing emergency savings. Vanguard senior researcher Stephen Weber, CFP®, CLTC®, describes the broader near-term purpose this way: “We want people to think about cash as the money they need for expenses in the near term—not just emergencies, but everything happening in the next year.”
How much emergency cash should you hold?
Use three to six months of living expenses as a starting range
Vanguard’s current emergency-fund guide suggests building toward three to six months of living expenses for potential income shocks. Calculate the amount from essential monthly costs—housing, utilities, food, insurance, transportation, minimum debt payments and necessary medical spending—not from gross income or a preferred lifestyle budget.
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This range is a planning convention, not a formula for the cash percentage in an investment account. A household with highly stable income and two earners may choose the lower end; a single-income household, commission-based worker or person with expensive ongoing care may need more. The right number is the amount that lets you handle a realistic interruption without selling investments at an unfavorable time or taking expensive debt.
Check whether your current reserve covers a real shock
Emergency savings remain a widespread gap. The Board of Governors of the Federal Reserve System reported that 37% of American adults did not have enough cash to cover a $400 emergency expense in 2024. Separately, a 2025 study of Vanguard 401(k) participants found that 45% of surveyed participants had less than $2,000 in emergency savings. The latter figure describes that Vanguard-plan sample, not all U.S. households.
If you are below your own minimum reserve, direct new savings toward liquid cash before adding a voluntary portfolio cash position. Build a starter buffer first if necessary, then work toward the three-to-six-month range while continuing any retirement contributions needed to capture an available employer match.
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Reserve money for expenses due within 12 months
Emergency funds are only one part of the cash decision. List expenses you expect during the coming year: insurance premiums, taxes, tuition, a move, major repairs, planned travel, annual subscriptions and other large bills. Keep the amount needed for those commitments liquid, even if you have a separate emergency fund.
Vanguard’s June 9, 2026 framework focuses on expenses expected within the next 12 months and warns that holding more cash than near-term needs can limit long-term growth. Treat that as Vanguard’s planning approach rather than a universal standard. Your own calendar may justify a different horizon—for example, a home purchase scheduled in 18 months or a tuition payment due in nine months.
Match the account to the deadline. Money needed immediately belongs in an account you can access without market risk or a waiting period. Money needed on a known future date may fit a certificate of deposit whose maturity matches that date, provided you understand early-withdrawal restrictions. Do not place a near-term obligation in stocks simply because the average historical return is higher; a market decline when the bill arrives can permanently damage the plan.
Decide separately whether your portfolio needs cash
Time horizon
For a goal many years away, temporary price declines may be tolerable because you have time to recover. For a goal that is approaching, a larger allocation to cash or other lower-volatility assets can reduce the chance that a market decline disrupts the spending plan. There is no single cutoff that applies to every goal; identify the date you expect to begin withdrawals and the period over which you will spend the money.
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Risk tolerance is your ability and willingness to withstand losses. If a stock-market decline would cause you to sell in panic, a modest cash allocation may help you remain invested. Roger Aliaga-Díaz, Ph.D., Vanguard’s global head of portfolio construction and chief economist, Americas, states the core trade-off plainly: “Risk and return are always a trade-off.” Cash can make the ride easier, but accepting less volatility generally means accepting less expected long-term growth.
Funding level
Ask whether the goal is already well funded. An investor who has accumulated more than enough for a near-term objective may reasonably move a larger portion into cash to protect the outcome. Someone with a long horizon and an underfunded goal may need greater exposure to growth assets, assuming the risk is acceptable. The same cash percentage can therefore be prudent for one investor and counterproductive for another.
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Define what “cash” means in your allocation
Vanguard’s 2024 framework defines cash for its analysis as a readily available short-term instrument with high liquidity, minimal or negligible market risk and a maturity of under three months. Your brokerage statement may label several different holdings as cash, even though their protections, yields and price behavior differ. Classify the actual vehicle before deciding that you have met a target.
A step-by-step way to set your cash target
- Calculate essential monthly expenses. Use a recent spending history, remove discretionary items, and include irregular necessities by converting annual bills into monthly amounts.
- List committed spending for the next year. Add known premiums, taxes, tuition, repairs and other planned withdrawals, with their due dates.
- Set an emergency range. Multiply essential monthly expenses by three and six to create an initial planning band. Adjust for income stability, number of earners, dependents, health needs, insurance deductibles and access to other resources.
- Separate the accounts by purpose. Label emergency reserves, near-term spending and long-term investments so a market portfolio is not mistaken for available cash.
- Evaluate any extra portfolio cash. Write down the goal, expected withdrawal date, current funding level and the largest loss you could tolerate without changing the plan.
- Choose the holding based on access and protection. Compare the account’s withdrawal process, principal risk, insurance or investor protection, yield, fees and minimum balance.
- Automate and review. Direct a fixed amount from each paycheck until the reserve is complete, then rebalance when your income, household or goal date changes.
Where can you keep cash?
Access, risk, protection, return, cost and timing matter more than a label. Investor.gov lists savings and checking accounts and certificates of deposit as savings options. SEC guidance also describes bank sweeps, money market fund sweeps and brokerage free credit balances. These are not interchangeable.
| Holding type | Access and timing | Principal risk | Protection to verify | Typical use |
|---|---|---|---|---|
| Savings or checking account | Generally available for immediate bills and withdrawals | No market-price fluctuation as a bank deposit | FDIC insurance when held at a participating insured bank, subject to applicable limits and ownership rules | Emergency reserve and routine near-term spending |
| Certificate of deposit | Available at maturity; early withdrawal may involve a penalty or restrictions | Deposit principal is not exposed to stock-market prices | FDIC coverage when issued by a participating insured bank, subject to applicable limits | A known expense date that allows the money to remain committed |
| Bank sweep in a brokerage account | Automatically moves eligible brokerage cash to participating banks | Deposit value does not move with stock prices | FDIC coverage may apply at participating insured banks; confirm how balances are allocated and what limits apply | Brokerage cash that must remain liquid while earning a deposit rate |
| Money market fund sweep | Usually usable through the brokerage settlement process | Fund shares are securities and can fluctuate; it is not a bank deposit | SIPC rules may protect eligible customer property if a broker fails, but SIPC does not protect against a decline in a security’s value | Short-term brokerage liquidity for investors who accept fund, fee and yield terms |
| Uninvested brokerage free credit balance | Generally available for trades or withdrawal under the brokerage’s procedures | Value does not track stock prices, but the balance is an obligation of the brokerage until used or swept | Review the brokerage agreement and applicable SIPC treatment; do not assume FDIC coverage unless the balance is actually deposited through a bank sweep | Temporary settlement cash awaiting a planned use |
The SEC’s May 14, 2025 bulletin cautions that sweep-program rates and terms can vary significantly. Check the default sweep option, current rate methodology, fees, minimums, eligibility rules, transfer timing and the exact protection that applies. FDIC insurance for deposits at participating insured banks and SIPC protection for eligible customer property serve different purposes. Neither should be treated as a guarantee against every loss, and SIPC does not cover a decline in the value of securities.
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Cash’s benefits and costs
What cash does well
- Liquidity: You can pay an urgent bill without waiting for a market recovery.
- Stability: Properly structured deposits and other low-risk vehicles are less exposed to daily stock-market swings.
- Behavioral support: A reserve can reduce the pressure to sell long-term investments during a downturn.
- Certainty for near-term goals: Matching cash to a known obligation makes the spending plan easier to execute.
What cash can cost
- Inflation risk: Investor.gov notes that savings interest may fail to keep pace with inflation, reducing purchasing power over time.
- Opportunity cost: Cash held beyond your emergency and near-term needs is not participating fully in long-term growth assets.
- Lower returns or fees: The advertised rate may vary, and account fees or minimums can reduce what you actually earn.
- False security: A brokerage “cash” label does not tell you whether the balance is a bank deposit, a money market fund or a free credit balance.
Three examples of applying the framework
Stable two-income household
Suppose two earners have predictable salaries, few dependents and essential expenses of $5,000 a month. Their initial emergency planning band is $15,000 to $30,000. They would add separately for a $6,000 insurance premium due in six months. Once those amounts are covered, their retirement portfolio need not hold an additional cash percentage unless a specific goal or personal tolerance justifies it.
Single-income household with variable pay
A household spending $4,000 a month with one irregular income stream starts with a $12,000 to $24,000 emergency range, then considers a reserve above that band for periods when contracts may stop. A larger liquid balance may be reasonable because the probability and duration of an income interruption are higher, even though the money earns less than a long-term stock allocation might.
Investor approaching a large withdrawal
An investor whose goal is well funded and who expects to withdraw $40,000 over the next year may move that planned amount into suitable cash or short-term holdings. Keeping the entire remaining retirement portfolio in cash would be a separate decision requiring a much longer horizon, a risk assessment and a review of whether inflation could undermine future spending.
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Common mistakes and how to correct them
- Using a percentage as a universal answer: Replace “10% in cash” with a dollar target tied to expenses, goal dates and risk tolerance.
- Counting investments as emergency savings: Keep the emergency amount in a vehicle that can be accessed without relying on a favorable market price.
- Confusing income with expenses: Vanguard’s three-to-six-month convention is based on living expenses; do not multiply gross annual income by an arbitrary fraction.
- Ignoring planned bills: Add known spending within the coming year instead of assuming the emergency fund covers everything.
- Assuming every sweep is insured: Read the brokerage’s sweep disclosure and identify whether the balance is a bank deposit, fund shares or a free credit balance.
- Chasing a headline yield: Compare the rate with fees, minimums, withdrawal limits, transfer delays and the protection attached to the account.
- Leaving a large surplus idle forever: After emergency and near-term needs are covered, revisit whether the surplus belongs in a diversified long-term plan consistent with your risk capacity.
When to review the amount
Recheck the target after a job change, marriage or separation, birth or adoption, move, major debt change, health event, insurance change or shift in a goal’s date. Review at least annually even when nothing obvious changes. Recalculate essential expenses, refresh the next-12-month spending list and verify the sweep rate and terms on any brokerage cash. A reserve that was adequate last year can be too small after rent, childcare or medical costs rise.
The practical answer is therefore two-part: protect emergencies and known near-term spending with liquid cash, using three to six months of essential expenses as an initial emergency range; then choose any additional portfolio cash only after considering time horizon, risk tolerance and how fully the goal is funded. Cash is a tool for certainty and access, not a permanent substitute for a long-term investment plan.
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