High Yield Savings vs CD vs T-Bills: Where to Keep Cash

High yield savings vs CD vs Treasury bills vs money market funds: compare yields, access, safety and taxes, plus laddering and which fits your goal best.

When you're deciding between a high yield savings vs CD, or wondering whether Treasury bills or a money market fund would pay more, the right answer depends less on chasing the top rate and more on when you'll need the money. All four are low-risk places to keep cash. They differ in how fast you can get your money, how they're protected, and how they're taxed.

This guide compares them side by side, explains how each works, shows how to build a simple ladder, and covers how Federal Reserve decisions and inflation affect what you actually earn. It's written for readers in the US, and a dedicated section covers savings options in the UK and Europe.

Quick comparison table

Rates change constantly. The yields below are rough ranges from sources dated in 2026 (details and dates in the next section). We could not find one consistent, official set of US figures for late October 2026, so check live rates before you act.

	High-yield savings	CD (certificate of deposit)	Treasury bills	Money market fund
Typical yield (2026)	Top online accounts up to about 4.25% APY (early Oct.); national average savings rate about 0.38% (July)	Top 12-month CDs about 4.40% APY (Aug.–Oct.); national average 12-month about 1.7% (Aug.)	4-week bill about 3.67% (Aug. 13)	Usually tracks T-bill yields, minus fees
Access	Any time; transfers in 1–3 days	Locked until maturity; early-withdrawal penalty	Sell before maturity (via a broker) or wait 4–52 weeks	Usually sell any business day
Safety	FDIC/NCUA insured to $250,000	FDIC/NCUA insured to $250,000	Backed by the US government	Not insured; invests in very short-term debt
Rate type	Variable; can change any time	Fixed for the term	Fixed until maturity	Variable, daily
US taxes	Federal + state income tax	Federal + state income tax	Federal only; exempt from state and local tax	Depends on holdings; government funds may be partly state-exempt
Minimum	Often $0	Often $0–$1,000	$100 at TreasuryDirect	Often $0–$3,000

Jargon check: APY (annual percentage yield) is the yearly return including compounding. Liquidity means how quickly you can turn something into spendable cash without losing money.

Where today's rates stand (and how we sourced them)

High-yield savings: Headlines on Yahoo Finance dated October 2, 2026 listed top high-yield savings rates of up to about 4.25% APY. By contrast, the FDIC's national average savings rate was about 0.38% as of July 2026, per FRED (St. Louis Fed). That gap is why it pays to shop around.
CDs: The same early-October Yahoo Finance headlines cited best CD rates of about 4.40% APY. A Walnut Invest summary of FDIC data put the national average 12-month CD at about 1.71% in August 2026 (we could not confirm this on the FDIC's own page).
T-bills: The most recent dated figure we found was a 4-week T-bill yield of about 3.67% as of August 13, 2026 (secondary source). For the latest numbers, see TreasuryDirect auction results.
Money market funds: Yields generally follow short-term T-bill rates minus the fund's expense ratio. Check each fund's published "7-day yield."

We were unable to verify a single official, late-October 2026 table for all four, so treat these as a snapshot and recheck.

How each option works

High-yield savings accounts

A high-yield savings account (HYSA) is a regular bank savings account, usually at an online bank, that pays well above the national average. You can deposit and withdraw freely, and deposits are covered by FDIC insurance up to $250,000 per depositor, per insured bank, per ownership category (FDIC). Credit unions offer the same coverage through the NCUA. The catch: the rate is variable and usually falls soon after the Fed cuts rates.

Certificates of deposit (CDs)

A CD locks your money for a set term (commonly 3 months to 5 years) at a fixed rate. Withdraw early and you usually pay a penalty, often a few months of interest. CDs suit money you're sure you won't need before the term ends. "No-penalty" CDs exist but typically pay less. Brokered CDs, bought through a brokerage, can be sold before maturity but the price can move.

Treasury bills

T-bills are short-term loans to the US government, maturing in 4 to 52 weeks. You buy them at a discount and get the full face value at maturity; the difference is your interest. You can buy at TreasuryDirect from $100 or through a brokerage. Their big perks: they're backed by the US government and the interest is exempt from state and local income tax, which matters in high-tax states.

Money market funds

A money market fund is a mutual fund that holds very short-term, high-quality debt such as T-bills. It aims to keep a stable $1 share price and pays a variable yield. It is not FDIC insured, though losses have been very rare. Don't confuse it with a money market account, which is a bank deposit account and is FDIC insured.

Money market fund vs savings account: the short answer

If you want the simplest setup and insurance, a high-yield savings account wins. If you already have a brokerage account, a money market fund (especially a government fund) can pay a similar or slightly higher yield and may save on state taxes, but it isn't insured and money can take a day to settle into your bank.

Laddering CDs and T-bills

A ladder splits your money across several maturities so some cash comes free regularly while the rest earns a locked-in rate.

Example (assumptions for illustration): You have $10,000 you won't need for a year.

Rung	Amount	Term	Matures
1	$2,500	3 months	February
2	$2,500	6 months	May
3	$2,500	9 months	August
4	$2,500	12 months	November

Every three months, a rung matures. You can spend it if needed, or roll it into a new 12-month CD or T-bill. After the first year, all your money earns 12-month rates while a quarter of it becomes available every three months. You can do the same with 4-, 13- and 26-week T-bills, and many brokers let you auto-roll them.

How Fed rate changes affect your cash

The Federal Reserve sets a target for overnight bank lending rates, and short-term savings yields follow it closely. On October 28, 2026, the Fed held its target range at 3.75%–4.00%.

HYSAs and money market funds move fastest; their yields can change within days or weeks of a Fed move.
T-bills reprice at every weekly auction, so new purchases reflect current expectations, including where markets think the Fed is going next.
CDs lock in today's rate. If you expect rates to fall, a longer CD protects your yield; if you expect rises, shorter terms or a ladder keep you flexible.

For a wider look, see how rising interest rates affect stocks, gold, savings and loans and our piece on why Treasury yields can fall during safe-haven demand.

Inflation and your real return

Your real return is roughly your yield minus inflation. Suppose an account pays 4.0% and inflation runs at 3.0%: your real return is about 1.0%. On $10,000, you'd earn $400 in interest, but prices would rise about $300, so your buying power grows only about $100 (before taxes). If you're in the 22% federal bracket, tax takes $88 of the $400, leaving a real gain of about $12.

Inflation has been running hot recently; US PCE inflation was 3.6% in September. The lesson: cash is great for safety and short-term goals, but over many years it may barely keep up. Long-term money usually belongs in diversified investments, as explained in index funds for beginners.

Which option fits which goal?

Goal	Good fit	Why
Emergency fund	High-yield savings (or money market fund)	Instant access, insured, no penalty. See how to build an emergency fund.
Known expense in 6–24 months (car, wedding, tuition)	CD or T-bill timed to the date, or a ladder	Locks a rate; maturity matches your need
Large cash pile in a high-tax state	T-bills or a government money market fund	State tax exemption can beat a slightly higher bank rate
Cash above $250,000	T-bills, or deposits spread across banks	Stays within insurance limits or uses government backing
Money for 5+ years away	Usually diversified investments	Cash may not beat inflation over time

Outside the US, the same ideas apply: compare insured bank savings, fixed-term deposits and short-term government bills in your country, and check your local deposit-insurance limit.

Quick checklist before you move cash

When will I need this money?
Is the bank or credit union FDIC/NCUA insured, and am I under $250,000 per bank and ownership category?
What's the early-withdrawal penalty on this CD?
What is the yield after state tax?
Is there a minimum balance or monthly fee?

Savings options in the UK and Europe

The US products above have close cousins in the UK and the eurozone. The same rule applies: match the product to when you'll need the money.

UK options at a glance

	Easy-access savings	Fixed-rate bond	Cash ISA	Premium Bonds	Treasury bills / gilts
US equivalent	High-yield savings	CD	Tax-free savings (no direct US match)	None (prize draw)	T-bills / Treasuries
Access	Any time	Locked for the term (often 1–5 years)	Easy-access or fixed versions	Cash in any time	Sell via a broker or hold to maturity
Return	Variable rate	Fixed rate	Interest tax-free	Tax-free prizes, no guaranteed return	Fixed; gilt prices move with rates
Protection	FSCS up to £120,000	FSCS up to £120,000	FSCS up to £120,000	100% backed by HM Treasury	UK government debt

Easy-access savings pay a variable rate and let you withdraw whenever you like.
Fixed-rate bonds are the UK version of CDs: you lock money away for a set term at a fixed rate, and early access is usually restricted or penalised.
Cash ISAs shelter interest from tax within the £20,000 annual ISA allowance for 2026/27. From 6 April 2027 the cash portion is due to be capped at £12,000 a year for under-65s, with the overall £20,000 unchanged (GOV.UK: ISAs; AJ Bell).
Premium Bonds from NS&I pay tax-free prizes instead of interest. The prize fund rate is 4.35% from the September 2026 draw (odds of 21,000 to 1 per £1 bond), after a cut to 3.30% in April and a rise to 3.80% in July (NS&I). The prize fund rate is an average; most holders earn less, and some win nothing.
UK Treasury bills and gilts are government debt. Individuals usually buy gilts through a broker or investment platform; gilts held to maturity return their face value, but their price can move if sold early.

How your money is protected. The UK's Financial Services Compensation Scheme (FSCS) raised deposit protection from £85,000 to £120,000 per person, per authorised bank or building society, on 1 December 2025 (so £240,000 for a joint account). Brands sharing one banking licence share one limit. In the EU, the deposit guarantee scheme covers €100,000 per depositor, per bank.

Where UK rates stand. The Bank of England's Bank Rate is 3.75%, held at the 17 September 2026 meeting, according to Cambridge Currencies (we could not confirm this on the Bank's own site, so check the Bank of England). The next decision is due on Thursday 5 November 2026, and analysts are split between a hold and a rise. Savings rates tend to follow Bank Rate, so compare live rates before you commit.

In the eurozone. The European Central Bank kept its deposit facility rate at 2.50% on 29 October 2026, after quarter-point rises in June and September 2026 (CNBC; ECB). Euro savings deposits and term deposits usually pay less than this, and rates differ a lot between countries and banks. Interest is taxed under national rules.

FAQ

Is a high-yield savings account or a CD better?

A high-yield savings account is better if you might need the money any time. A CD can be better if you know you won't touch the money for a set period and want to lock in a rate, especially if rates may fall.

Are Treasury bills better than CDs?

It depends on rates and taxes. T-bills are exempt from state and local income tax, so in a high-tax state a T-bill can beat a CD with a slightly higher rate. Compare after-tax yields.

Is a money market fund safe?

Money market funds invest in very short-term, high-quality debt and losses have been rare, but they are not FDIC insured. Government money market funds, which hold mostly Treasuries, are generally considered the most conservative type.

What is the best place to keep cash for an emergency fund?

Most experts suggest an insured, easy-access account such as a high-yield savings account, so the money is safe and available within a day or two.

How much of my money is FDIC insured?

The standard limit is $250,000 per depositor, per insured bank, per ownership category, according to the FDIC.

Sources

This article is for educational purposes only and is not financial advice. Consider speaking with a qualified financial professional.