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It might sound impossible, but a large sum of cash could suddenly drop into your life. Perhaps you sold your home, received a gift or inheritance, or earned a bonus.

Whatever the source of your windfall, you’ll have to figure out where to stash your cash while you decide how to make the best use of it.

But where?

Your choice should give you a high degree of safety and liquidity and minimize the investment expense, says Kent Grealish, a fee-only investment planner at Grealish Investment Counseling in San Bruno, California.

The return on your investment might also be a factor, but that’s likely to be lower on the list of requirements in the short term.

“The yield isn’t really relevant because you get what you get. You don’t want to chase yield and give up either safety or liquidity,” Grealish says.

With that in mind, here are some options to consider and some to scratch.

1. Open a checking account

A checking account at a bank or credit union is a safe option to put some money. These accounts are safe and secure, deposits can be withdrawn at any time and there’s no risk to your principal.

Checking accounts typically don’t earn much interest, but there are some available that offer decent yields. But if you need access to your money and don’t want it locked up for a longer period of time, a checking account could be the right place to keep it.

Fees typically are nominal or waived if you maintain a minimum balance or if you complete a certain number of direct deposits or debit card swipes each month.

2. Consider a money market account

Want a little bit more yield than you’d get from a checking account? Give money market accounts a look.

A money market account is a savings account that allows a limited number of checks to be drawn from the account each month. These accounts are safe and are good for building your savings.

However, don’t expect to get rich off the interest. Rates on money market accounts remain low, but you can find competitive yields if you do a little research.

3. Stash it in a savings account

A high yield savings account might pay a bit more interest than a checking account, making it another attractive option.

However, if you’ll need to access portions of your money from time to time, a savings account’s restrictions might be an issue. You’re limited to six withdrawals per month from a savings account. You may be charged a fee for subsequent withdrawals.

A high-yield savings account might offer a sign-up bonus or an interest rate bonus, but you’ll likely have to maintain a minimum balance of $5,000 or $10,000 in the account to capture that higher yield.

4. Take your savings online

Online banks typically offer higher interest rates than brick-and-mortar banks, says Ben Wacek, a certified financial planner with Wacek Financial Planning in Minneapolis.

In fact, some online banks offer annual interest rates above 2.2 percent, compared with nearly 0 percent for traditional banks. For a $100,000 deposit, 2.2 percent represents $2,200 per year.

Online accounts typically offer complete liquidity, no minimum balance requirement and no annual or monthly fees.

A downside: no neighborhood bank branches.

“You can call and talk to somebody who can help answer your questions, but you don’t have a physical location where you can go and talk to somebody in person,” Wacek says.

5. Don’t forget CDs

The main difference between a savings account and a certificate of deposit is that the CD locks up your money for a set term. Withdraw the cash early, and you’ll be charged a penalty.

CDs also can be disadvantageous when interest rates are low and upward pressure could cause yields to rise, Wacek says.

“If you lock in a longer-term CD, it’s possible that a couple of years from now, you would’ve been better off if you’d kept the cash completely flexible in an online savings account,” he says.

Another strategy is to open several CDs that expire every few months on a rolling basis in a CD ladder. This offers more flexibility than one larger CD with one end date. A CD ladder allows you to take advantage of high interest rates now while remaining flexible to take advantage of higher rates in the future.

6. Try Treasury bills

Most checking and savings accounts and CDs offer deposit insurance up to $250,000 — an important benefit.

But suppose you need to stash more than $250,000. In that case, you might want to look at U.S. Treasury bills, or T-bills, which Grealish says are “absolutely liquid — and really cheap to buy and sell if you’re with a reputable firm.”

“The Treasury sells three-month and six-month bills every week,” he adds. “It’s a Monday auction, and if you put your order in a few days ahead of time, (the investment firm) will gang all the orders together, buy them and distribute them to their clients.”

T-bills are U.S. government debt, so there’s no risk you’ll lose your principal. “You can’t get a higher degree of safety than a Treasury bill,” Grealish says.

7. Think short-term bonds

If you’re planning to park your cash for at least five years, you might want to consider options that are more like investments than savings.

An investment might generate a higher return, but all investments come with the risk that you could lose some or all of your money.

For example, a mutual fund that invests in short-term bonds might increase your income by a little bit, but if interest rates rise, the value of the fund is likely to decrease.

“Your principal isn’t protected, so years from now when you want to take that money out, your principal potentially could be less than you originally put in. If you’re looking at five years or less, there is definitely more risk with that strategy,” Wacek says.

8. These options are volatile and risky

There are also even riskier options such as gold, which comes in bars, coins, jewelry, stocks and funds.

Gold isn’t a good place to park cash because it’s as volatile as an investment and doesn’t produce any interest or dividends that might offset a drop in the market price.

“It’s actually a pretty risky investment, especially if it’s just a short-term holding spot,” Wacek says.

Grealish says any investment that claims to combine low risk and high return is probably too good to be true and should be avoided.

“If something promises you great safety and liquidity and a high yield, there is something wrong,” he says. “That shouldn’t exist. There is no magic.”