Where should you keep your cash savings?
Use insured savings for money you may need soon, and CDs or Treasury bills only for money with a fixed date.
New to this?
Saved cash has a few safe homes. A savings account lets you withdraw anytime. A CD (certificate of deposit) pays a fixed rate if you leave the money for a set time. A Treasury bill is a short loan to the U.S. government, repaid on a set date. Which fits depends on when you need the money.
Read first
Myth
My money is safest sitting in my regular checking account.
Truth
It's safe there, but it may earn close to nothing. At an example 4.00% in an insured high-yield savings account, $10,000 earns about $407 in a year, with the same FDIC protection up to $250,000.
Worth memorizing
- 1
Pick the account by when you need it.
Money you might need this month goes in savings. Money with a known date can go in a CD or Treasury bill.
- 2
Insured deposits are covered up to a limit.
Savings, CDs and money market accounts (savings with checks) at insured banks are covered to $250,000 per depositor, bank and ownership category.
- 3
Breaking a locked rate early costs money.
In the example, cashing a CD out after 6 months turns $222 of interest into $112 after the penalty.
Here's what I'd do. Keep about a month of bills in checking and the rest of your emergency money in a high-yield savings account. Only lock cash in a CD or Treasury bill when you know the date you'll need it.
Do this today
Log in to your savings account and find its current rate. Then write down each pot of savings and the date you will need it. Anything without a firm date stays in savings.
Practice
1 of 3
Which option is the best fit for an emergency fund?
Emergency money needs to be safe and reachable within a day or two. Savings at an insured bank is both, with no penalty to withdraw.
2 of 3
You hold a $10,000 CD at 4% and break it early. The penalty is 3 months of interest. About how much is the penalty?
One year of interest is $10,000 × 4% = $400. Three months is a quarter of that, $400 ÷ 4 = $100.
3 of 3
Which of these is not covered by FDIC insurance?
A money market fund is an investment, not a bank deposit. It aims to hold a steady value but can lose money and is not FDIC insured.
Tips
Label each pot by date
Write down when you need each chunk of savings. Anything you might need within a few months stays in savings. Only money with a fixed date goes into a CD or Treasury bill.
Read the early withdrawal penalty
Before you open a CD, find the penalty in the account terms. A common type is a set number of months of interest, and longer CDs often charge more.
Check the insurance yourself
Look up the bank on the FDIC site or the credit union on the NCUA site. Confirm your total there stays under $250,000 per ownership category.
Compare rates once a year
Savings rates are variable and can drop without notice. Set a yearly reminder to compare your rate with other insured banks and move the money if the gap is large.
A worked example: one year of savings in two places
Priya has $10,000 she plans to use in a year. She compares a high-yield savings account at 4.00% with a 12-month CD at 4.40%. Both rates are examples.
- Both accounts compound monthly. Savings earns about $407 in a year. The CD earns about $449, so the CD pays $42 more if she keeps it the full year.
- If Priya needs the money after 6 months, the CD has earned $222. A 3-month penalty is $10,000 × 4.40% ÷ 4 = $110.
- She keeps $222 − $110 = $112. Savings would have paid her about $202 by then, with no penalty.
- Deposit$10,000
- Savings interest at 4.00%+$407
- Savings after 1 year=$10,407
- Deposit$10,000
- CD interest at 4.40%+$449
- CD after 1 year=$10,449
- CD interest after 6 months$222
- Penalty, 3 months of interest−$110
- Interest kept if she cashes out=$112
Try your numbers
Reference
How long it takes to save $5,000 at a 4% savings rate (example rate)
| Saved per month | Time to reach $5,000 |
|---|---|
| $100 | 3 yr 11 mo |
| $200 | 2 yr 1 mo |
| $300 | 1 yr 5 mo |
| $500 | 10 mo |
Common mistakes
Locking up the emergency fund
A CD rate can look tempting, but emergencies come without warning. Paying a penalty to reach your own money defeats the purpose of having a fund.
Confusing the account and the fund
A money market account at a bank is insured. A money market fund at a brokerage is an investment that is not bank-insured. The names are close, so check which one you are opening.
Chasing a rate you can't keep
A high intro rate on savings can drop after a few months. Compare the regular rate, the fees and the minimum balance, not just the number in the ad.
Going deeper
Keep money you might need any day in an insured high-yield savings or money market account. Money you won't touch for a set time can earn a locked rate in a CD or Treasury bill.
Access comes first
High-yield savings and money market accounts let you move money out within a day or two. CDs lock it up until a set date. Treasury bills pay back on a set date too, but you can sell some early through a brokerage.
Insurance depends on the account type
Savings, money market accounts and CDs at an insured bank or credit union are covered up to $250,000 per depositor, per institution, per ownership category. Treasury bills are backed by the US government instead.
Some rates move and some are locked
Savings and money market rates are variable, so the bank can change them at any time. A CD or Treasury bill locks its rate until it matures.
Breaking a lock has a cost
Taking money out of a CD early usually costs a penalty, often a few months of interest. Selling a Treasury bill early returns the market price, which can be more or less than you paid.
High-yield savings accounts
A high-yield savings account is a regular savings account that pays a higher rate than most checking accounts. Online banks and credit unions often pay the most. You can move money out to checking whenever you want, and it usually arrives in a day or two.
The rate is variable. If you open an account at 4.00%, it may be 3.25% a year later. That is fine for an emergency fund, since the point is safety and access. Earning some interest is a bonus.
Money market accounts
A money market account is a bank or credit union deposit account, so it is insured just like savings. It often pays a variable rate close to high-yield savings and may come with checks or a debit card. Some banks require a higher minimum balance or limit how many withdrawals you can make each month.
Don't mix it up with a money market fund. A fund is an investment you buy at a brokerage. It aims to keep a steady $1 share price, but it is not bank-insured and can lose value.
Certificates of deposit
A certificate of deposit (CD) holds your money for a set term, such as 6 months, 1 year or 5 years, at a rate that stays the same the whole time. CDs at insured banks and credit unions carry the same insurance as savings.
The trade is access. If you need the money before the term ends, you usually pay an early withdrawal penalty, often a number of months of interest. Some penalties can be larger than the interest you have earned, which means you get back less than you put in. Read the terms before you open one.
Treasury bills
A Treasury bill is a short-term loan to the US government. Terms run from 4 weeks to 52 weeks. You buy it for less than its face value and get the full face value back when it matures. The difference is your interest.
You can buy Treasury bills from TreasuryDirect, the government's own site, or through a brokerage account. Their interest is taxed by the federal government but not by states or cities, which helps most in a high-tax state. Bills bought on TreasuryDirect are meant to be held until they mature. Through a brokerage you can sell early, but the price can be lower than you paid.
How to split your cash
Start with your emergency fund in a high-yield savings or money market account. Never lock it up, because emergencies don't wait for a CD to mature.
Then look at money you are saving for a known date, like a car down payment in 12 months or a tax bill in April. That money can go into a CD or Treasury bill that matures just before the date. If you aren't sure of the date, keep it in savings. The extra rate on a CD is small next to a penalty.
Questions people ask
Is a high-yield savings account better than a CD?
It depends on when you need the money. Savings wins for anything you might need soon, because you can withdraw any time. A CD can pay a bit more for money you are sure you won't touch until a set date.
Can you lose money in a CD?
Not from the bank failing, as long as you stay within insurance limits. You can end up with less than you deposited if you withdraw early and the penalty is larger than the interest earned so far.
Are Treasury bills safer than a bank account?
Both are very safe. Treasury bills are backed by the US government. Insured bank deposits are backed by the FDIC up to $250,000 per depositor, per bank, per ownership category. For most savers the bigger difference is access, not safety.
Do I pay taxes on savings interest?
Yes. Interest from savings, money market accounts and CDs is taxable income each year. Treasury bill interest is taxed federally but not by states or cities. Rules depend on your situation, so check IRS guidance or a tax professional.
Printable worksheet with answer key, free for classrooms. Lesson plan for this unit.
Sources
- FDIC: Understanding deposit insurance
- NCUA: Share insurance coverage
- TreasuryDirect: Treasury bills
- Investor.gov: Certificates of deposit (CDs)
Updated October 1, 2026. General education, not personalized financial, tax or legal advice. Figures are examples. Check current rates and limits before you act.
Terms on this page
Related lessons
Get your money plan by email
One step each morning: what to do, why it comes in that order, and one small thing to try. About 5 minutes. Then one short note a week. Free, unsubscribe anytime.