The right cash balance depends on your time horizon and what you're saving for
There is no single correct percentage of cash to hold. The answer depends on when you need the money, how much volatility you can tolerate, and what you're using the cash for. Someone saving for retirement in 30 years can hold less cash than someone who might need money in two years. Someone with irregular income needs more cash on hand than someone with a steady paycheck.
The trade-off is straightforward: cash earns very little (currently around 4 to 5 percent in a high-yield savings account), while stocks and bonds historically earn more over long periods. But cash doesn't lose value when markets fall. The more cash you hold, the safer you are in the short term and the less you earn over time.
Key Takeaways
- Cash holdings should match your time horizon: people investing for 10+ years can hold 5 to 10 percent cash, while those needing money within five years should hold 20 to 50 percent.
- An emergency fund of three to six months of expenses should sit in a high-yield savings account separate from your investment portfolio.
- Money you'll need within one to three years belongs in cash or short-term bonds, not stocks, regardless of what the rest of your portfolio holds.
- High-yield savings accounts currently pay 4 to 5 percent annually and are FDIC-insured up to $250,000 per account holder per bank.
Cash allocation by time horizon
If you're investing money you won't touch for 10 years or more, holding 5 to 10 percent in cash is typical. This gives you a cushion to rebalance when markets drop and covers unexpected expenses without forcing you to sell stocks at a loss. The rest can go into stocks and bonds.
If you need some of the money within five to ten years, increase cash to 15 to 25 percent. This reduces the damage if markets fall right before you need the money. For example, if you're saving for a down payment you plan to use in seven years, holding 20 percent cash means you're not forced to sell stocks that have dropped 30 percent.
If you need the money within one to five years, hold 30 to 50 percent in cash or short-term bonds. Money you'll definitely need in two years should not be in stocks at all—the risk of a market downturn right before you need it is too high. This is not about missing gains; it's about not being forced to sell at a loss when you have no choice about timing.
If you need the money within one year, keep it all in cash or money market funds. There is no reason to take stock market risk for money you're about to spend.
Emergency fund versus portfolio cash
Your emergency fund and your investment portfolio cash are different things. An emergency fund—typically three to six months of living expenses—should sit in a high-yield savings account that is completely separate from your investments. This money is for job loss, medical bills, or urgent home repairs. It should never be invested.
The cash percentage in your investment portfolio is separate. It's part of your overall investment strategy, not your safety net. If you have a proper emergency fund in place, the cash in your portfolio can be smaller because you're not using it to cover unexpected expenses.
For example: you might keep $15,000 in a high-yield savings account as an emergency fund (separate), and also hold $8,000 in cash as part of a $100,000 investment portfolio (8 percent). These serve different purposes.
Where to hold portfolio cash
High-yield savings accounts currently pay between 4 and 5 percent annually, depending on the bank. These accounts are FDIC-insured up to $250,000 per account holder per bank, so your cash is protected. Banks that currently offer rates in this range include Marcus, Ally, and American Express Personal Savings, though rates change frequently. You can check current rates at sites like Bankrate or DepositAccounts.
Money market funds are another option. These are mutual funds that hold very short-term debt and typically yield close to what high-yield savings accounts offer. The difference is that money market funds are not FDIC-insured, though they are extremely low-risk. They're useful if you have more than $250,000 in cash and want to stay within one institution.
Short-term bond funds (holding bonds that mature in one to three years) yield slightly more than cash but carry a small amount of interest rate risk. If you're holding cash for money you need in three to five years, a short-term bond fund may be worth considering, but only if you can tolerate a small decline in value.
Do not hold portfolio cash in a regular savings account earning 0.01 percent. The difference between 0.01 percent and 4.5 percent is real money. On $10,000, that's $450 per year you're leaving on the table.
Rebalancing and when to adjust your cash percentage
If you started with 10 percent cash and the stock market rises, your cash percentage will fall to 8 percent or 7 percent. This is normal. You don't need to rebalance every month. Most people rebalance once or twice a year, or when their allocation drifts more than 5 percentage points from the target.
When you rebalance, you sell some of what has grown (usually stocks) and buy more of what has shrunk (usually cash or bonds). This forces you to sell high and buy low, which is the opposite of what most people do naturally. Rebalancing is one of the few ways cash in your portfolio actually earns its place.
If your time horizon changes—you lose your job, you decide to buy a house in three years instead of ten, you inherit money—adjust your cash percentage to match. There's no penalty for changing your allocation. Your cash percentage should always reflect when you actually need the money, not what you thought six months ago.
Common mistakes with portfolio cash
The biggest mistake is holding too much cash. People who keep 40 or 50 percent in cash for a 20-year retirement are giving up significant long-term growth. Over 20 years, the difference between 50 percent stocks and 80 percent stocks is substantial. If your time horizon is truly long, cash should be a small part of the picture.
The second mistake is holding too little cash and then panicking when markets fall. If you have no cash cushion and the market drops 20 percent, you either have to sell stocks at a loss or sit with the loss and hope it recovers. Having 10 percent in cash means you can rebalance without panic.
The third mistake is keeping cash in a low-yield account. Moving $20,000 from a 0.01 percent savings account to a 4.5 percent high-yield account takes 15 minutes and generates $900 per year in additional interest. There is no reason not to do this.
Frequently Asked Questions
Should I hold cash if I'm investing for retirement 30 years away?
Yes, but only 5 to 10 percent. You have enough time to ride out market downturns, so most of your money should be in stocks. The small cash portion gives you something to rebalance with and covers emergencies without forcing you to sell stocks at a loss. As you get closer to retirement, increase your cash percentage.
What's the difference between a high-yield savings account and a money market fund?
High-yield savings accounts are FDIC-insured up to $250,000 and currently pay 4 to 5 percent. Money market funds are not insured but are very safe and pay similar rates. Use a high-yield savings account if you have less than $250,000 in cash. Use a money market fund if you have more and want to keep everything at one institution.
Do I need both an emergency fund and cash in my investment portfolio?
Yes. Your emergency fund (three to six months of expenses) should be completely separate and untouched. The cash in your investment portfolio is part of your overall investment strategy and serves a different purpose. Having both means you're not forced to sell investments when an emergency happens.
When should I move money from cash into stocks?
If your time horizon has lengthened (you don't need the money as soon as you thought), or if you've rebalanced and your cash percentage has grown above your target, move the excess into stocks or bonds. Don't try to time the market. If you're moving money regularly (dollar-cost averaging), move it on a set schedule regardless of what the market is doing.
Is it ever okay to hold zero percent cash?
Only if you're investing money you won't need for at least 10 years and you have a separate emergency fund. Even then, holding 5 percent cash makes rebalancing easier. For any money you might need within 10 years, holding some cash reduces the risk of being forced to sell at a loss.