Where your dollars actually earn: HYSA, CDs, money market, T-bills

US consumers in 2026 face the best yield environment on liquid savings in roughly a generation. High-yield savings accounts pay APYs that would have been unthinkable in 2019, certificates of deposit have meaningfully higher rates than five years ago, money market accounts pay close to HYSA rates, and Treasury bills compete directly with all three on yield while offering state-tax exemption and the highest credit backing available anywhere. The choice between the four vehicles is a function of liquidity preference, tax bracket, and the specific dollar amounts involved — not of any single “best” answer that applies universally.

This guide walks through the four most common liquid savings vehicles available to a US consumer with cash to park: high-yield savings accounts, certificates of deposit, money market accounts, and Treasury bills bought directly from the US Treasury. For each, we cover what it actually is, the typical yield range as of 2026, the liquidity terms, the insurance mechanics, and the tax treatment — because tax treatment alone can move the practical winner between two seemingly identical-yield options. The closing sections work through a representative example and call out the structural mistakes consumers most commonly make.

The four vehicles at a glance

Vehicle	Typical 2026 yield range	Liquidity	Insurance
High-yield savings (HYSA)	~3.25% – 3.80% APY (variable)	Withdraw anytime, usually 1–3 business days to external account	FDIC $250,000 per depositor per insured bank per ownership category
Certificate of deposit (CD)	~3.25% – 4.00% APY (fixed) for 6 months to 5 years	Locked for the term; early withdrawal penalty typically 3–12 months of interest	FDIC $250,000 per depositor per insured bank per ownership category
Money market account (MMA)	~3.00% – 3.60% APY (variable)	Check-writing and debit access, federally limited to 6 outgoing transactions a month historically (regulation D was relaxed in 2020 but most banks still cap)	FDIC $250,000 per depositor per insured bank per ownership category
Treasury bill (T-bill)	~3.50% – 3.70% yield (varies with FOMC, by maturity)	Locked until maturity (4, 8, 13, 17, 26, or 52 weeks); secondary-market sale possible with potential loss	Full faith and credit of the US Treasury (effectively unlimited)

The yield ranges above are typical as of mid-2026; specific rates change weekly across HYSAs and MMAs, monthly across CDs, and every Tuesday and Thursday on T-bill auctions. The relevant tracking sources are listed in the methodology section.

High-yield savings account (HYSA) — the default liquid vehicle

A high-yield savings account is a deposit account at a bank or credit union that pays a substantially higher interest rate than a traditional brick-and-mortar savings account. The typical large traditional bank pays 0.01% APY on its standard savings product; a competitive online HYSA in mid-2026 pays approximately 3.25% to 3.80% — with the federal funds target range at 3.50–3.75% — depending on the bank’s funding needs and the broader rate environment.

The mechanics are simple: you deposit dollars, the bank credits interest daily (compounded daily, paid monthly in most cases), and you can withdraw to an external account on demand. Most online HYSAs are at FDIC-insured banks operating as separate brands of a parent — Marcus is part of Goldman Sachs Bank USA, SoFi Money is at SoFi Bank N.A., Ally is its own bank, Discover Bank is a separate FDIC charter from Discover Financial. The FDIC insurance applies to the underlying bank charter, not the brand, so a consumer with $250,000 at Marcus and $250,000 at Goldman Sachs Bank directly is insured for $250,000 total — not $500,000. This is a structural detail covered in detail in the how FDIC insurance actually works explainer.

The APY on a HYSA is variable, which means the bank can change it at any time. In a rate-cutting environment (the FOMC’s upcoming rate decision being the event that sets the direction of the federal funds rate), HYSA APYs typically follow within days or weeks. In a rate-raising environment, the same lag applies in reverse. Some HYSAs are deliberately slow to raise rates to retain margin; others are aggressive to attract deposits. The result is that the “best” HYSA APY at any given moment is whichever bank is currently competing hardest for deposits, and that ranking changes monthly. Tracking services (Bankrate, NerdWallet’s deposit tracker, the DepositAccounts.com aggregator) maintain weekly tables of the top rates.

The liquidity terms on a HYSA are essentially “withdraw anytime.” Federal Regulation D historically limited certain withdrawal types from savings accounts to six per month; the Federal Reserve suspended that requirement in 2020, but many banks still cap outgoing transactions or charge a fee for the seventh. ACH transfers to your external checking account are essentially always unlimited and take 1–3 business days; some HYSAs (Ally, SoFi) offer same-day transfers under certain conditions.

The tax treatment is straightforward: interest earned on a HYSA is taxed as ordinary income at the federal level, the state level (in states with income tax), and at most local levels. The bank issues a 1099-INT each January for the prior year’s interest if the interest exceeded $10. For a consumer in the 24% federal bracket plus 5% state tax, a 3.50% APY HYSA is approximately 2.49% after tax. This is the key comparison point for Treasury bills, which are exempt from state tax.

Certificate of deposit (CD) — fixed rate, locked term

A certificate of deposit is a deposit account that pays a fixed interest rate for a fixed term — typically 3 months to 5 years — in exchange for the depositor agreeing not to withdraw before the maturity date. CDs pay a slightly higher rate than HYSAs at the same bank in most environments, because the bank receives certainty about the term of the deposit and can match it more efficiently against term assets.

The mechanics: you deposit a lump sum, the bank issues the CD certificate at the agreed-upon APY, interest accrues over the term (sometimes paid out monthly, more commonly compounded and paid at maturity), and at maturity you receive the principal plus accrued interest. Most CDs auto-renew at the then-current rate unless the depositor instructs otherwise within a defined grace period (typically 7–10 days after maturity).

The locked-term tradeoff is the central feature. If you withdraw funds from a CD before the maturity date, the bank charges an early withdrawal penalty (EWP) — typically 3 months of interest for shorter CDs, 6 months for medium-term CDs, and 12 months for 5-year CDs. The penalty can exceed the interest earned if you withdraw very early in the term, in which case the EWP comes out of principal. A consumer who locks $20,000 into a 5-year CD at 3.75% and withdraws after one year may take a $750 penalty against the roughly $750 of interest earned, breaking close to even but with the time-value disadvantage.

CD rates in 2026 vary by term: shorter CDs (3–6 months) and 1-year CDs typically pay closest to the prevailing HYSA rate or slightly higher; 2-year and 3-year CDs often pay the highest rate on the curve when the yield curve is normal; 5-year CDs pay lower than 2-year CDs when the yield curve is inverted (as it has been intermittently in 2024–2026). The shape of the curve at any moment determines whether locking long is favorable; in inverted environments, the higher short-term rate plus the lower commitment is structurally better.

The CD laddering strategy — described fully in the CD ladder mechanics guide — addresses the locked-term tradeoff by buying a series of CDs with staggered maturities, so a portion of the ladder matures every year and is available for either withdrawal or reinvestment.

Tax treatment matches HYSA: interest is ordinary income at federal, state, and local levels. CDs receive a 1099-INT for interest paid in each tax year, even if the CD has not matured (interest is taxed when accrued, in most cases).

Money market account (MMA) — checking-like flexibility with HYSA-like yield

A money market account is a deposit account that combines features of a savings account (interest-bearing) and a checking account (limited debit card or check-writing access). At an FDIC-insured bank, an MMA pays APY typically slightly below the equivalent HYSA at the same bank — perhaps 0.25 to 0.50 percentage points lower — but offers check-writing and debit card access that a savings account does not.

The check-writing access is the historical reason MMAs existed at all. Before online banking made same-day transfers between accounts trivial, an MMA let a consumer earn interest while still being able to pay bills directly from the account. In 2026, the practical value of the check-writing access is smaller — most consumers move money between accounts in seconds via online banking — but the MMA still has a niche for consumers who keep a working capital balance that needs both interest and occasional direct payment.

The APY on an MMA is variable, like a HYSA, and changes with the rate environment. Federal Regulation D historically limited savings and MMA accounts to six certain types of outgoing transactions per month; the regulation was suspended in 2020, but most banks have retained the six-per-month cap either contractually or through fees. Verify with the specific bank before relying on an MMA for high-frequency transactions.

The federal insurance is FDIC at a bank, NCUA at a credit union, with the same $250,000 per-depositor-per-institution-per-ownership-category limit. The tax treatment is identical to HYSA and CD: ordinary income on the interest, 1099-INT each January.

The practical question of HYSA vs MMA reduces to whether the consumer needs the check-writing capability. If yes, the slightly lower MMA APY is a fair tradeoff. If no — and for most consumers the answer is no — the HYSA captures the same insurance and the same liquidity for a slightly higher yield.

Treasury bills (T-bills) — the federal alternative

Treasury bills are short-term debt securities issued by the US Treasury, with maturities of 4, 8, 13, 17, 26, or 52 weeks. They are sold at auction at a discount to face value and pay no coupon; the return is the difference between the purchase price and the face value at maturity. A 13-week T-bill auctioned at $99.10 per $100 of face value, held to maturity, returns roughly 3.63% annualized.

T-bills can be bought directly from the Treasury at TreasuryDirect.gov with no fee, or through a brokerage account (Fidelity, Schwab, Vanguard, etc.) at no fee. The direct purchase requires opening a TreasuryDirect account, which has a notoriously cumbersome interface but works correctly once set up; the step-by-step TreasuryDirect buying guide walks through the account opening, the bank linking, and the auction bidding. The brokerage route is simpler for most consumers and uses the brokerage’s auction-buying or secondary-market liquidity.

The yield on T-bills tracks the federal funds rate closely — typically within 10–30 basis points of the corresponding-maturity Fed target — and changes with each auction. The Treasury auctions 4-week, 8-week, 13-week, 17-week, 26-week, and 52-week bills on rotating weekly schedules, so a consumer who wants to buy can do so without waiting more than a few business days.

The structural advantage of T-bills over HYSAs and CDs is twofold. First, the credit backing is the full faith and credit of the US government, which is structurally stronger than FDIC insurance (the FDIC is itself backed by the same federal credit, but with the operational layer of a bank in between). Second, T-bill interest is exempt from state and local income tax, though it is taxed at the federal level. For a consumer in a high state-tax bracket (California 13.3% top marginal, New York 10.9% top marginal), the state-tax exemption can be worth 0.50 to 1.00 percentage points of effective yield — enough to flip a T-bill into the highest after-tax yield even when the nominal yield is lower than a comparable HYSA.

The structural disadvantages are two. Liquidity is limited until maturity (you can sell on the secondary market through a brokerage, but the price may be below par if rates have risen), and the dollar amounts are usually structured in $1,000 increments, though $100 minimums exist for direct TreasuryDirect purchases of bills.

Tax treatment compared

The tax treatment differences between the four vehicles can move the practical winner between two seemingly identical yields. The summary:

• HYSA, CD, MMA: interest is fully taxable at federal, state, and local levels. 1099-INT issued each January.
• T-bills: interest is fully taxable at the federal level, but exempt from state and local income tax. 1099-INT issued each January, with the state-exempt portion identified.
• All four: interest is taxed when earned, not when withdrawn. A CD that pays interest at maturity is still taxed in the year the interest accrues for most CD structures (some longer CDs are issued as zero-coupon and tax all interest at maturity — verify the specific CD).

For a consumer in a 24% federal bracket and a 5% state bracket, a 3.60% T-bill yields approximately 2.74% after tax (24% federal only), versus a 3.60% HYSA at approximately 2.56% after tax (24% federal + 5% state). The 0.18 percentage point gap on the same nominal yield is structural and recurring. For consumers in higher state-tax jurisdictions, the gap widens further; for consumers in states with no income tax (Texas, Florida, Washington, Nevada, Tennessee, South Dakota, Wyoming, Alaska, New Hampshire), the gap collapses to zero and the comparison reduces to nominal yield. The bracket-by-bracket version of this calculation — including the money-market-fund leg — is worked through in the T-bills versus HYSA versus money market funds after-tax comparison.

FDIC vs Treasury — different insurance mechanics

Both FDIC insurance and the federal backing of Treasury securities are extremely high-credit instruments, but they operate differently in ways worth understanding.

FDIC insurance covers deposits at FDIC-insured banks up to $250,000 per depositor, per insured bank, per ownership category. The per-depositor language is important: a single individual at a single bank in a single ownership category (individual, joint with another person, retirement, trust) is insured for $250,000 in that category. The same individual can hold $250,000 in an individual account at Bank A and $250,000 in an individual account at Bank B and have $500,000 total in insured deposits, because the two banks are separately insured. If they hold $500,000 in a single individual account at Bank A, $250,000 is insured and $250,000 is not.

Treasury securities are direct obligations of the US Treasury. They are backed by the “full faith and credit” of the United States — the constitutional power to tax and issue currency. There is no per-account limit; the Treasury is liable for the full face value plus interest regardless of the holder’s other Treasury positions.

A category that frequently sits invisibly inside this comparison is the brokerage cash sweep — the default vehicle into which idle cash in a Vanguard, Fidelity, Schwab, or Robinhood brokerage account is automatically deposited. Sweep yields can lag the household HYSA by 1–4 percentage points at some brokers, which on a $25,000 idle balance is $250–$1,000 of yield given up each year for no benefit. The brokerage cash sweep guide walks through what each major broker pays, how to switch from a low-yield bank sweep to a Treasury money-market sweep where the broker allows it, and the five-minute fix that frequently recovers the gap.

In practical terms, both are considered the gold standard of credit. The Treasury backing is structurally stronger because it removes the operational layer of a bank (which the FDIC then insures), but for sums under the FDIC limit at a single bank, the difference is academic. For sums above $250,000 the FDIC limit becomes binding, and either spreading across multiple banks or using Treasuries directly is the structural solution.

A worked example — $50,000 to park for 18 months

Consider a representative consumer, Emma, who has $50,000 in cash from a recent home sale that she will not need for approximately 18 months while she finalizes her next purchase. Her federal tax bracket is 24%, her state tax bracket is 5%, she does not need check-writing access on the funds, and she values having the money available within a few weeks if her purchase timeline changes.

The four options on the table:

Option A: HYSA at 3.50% APY. Fully liquid. 18 months of interest at 3.50% on $50,000 is approximately $2,650 nominal. After 24% federal + 5% state tax, net interest is approximately $1,880. Liquidity: any business day, 1–3 day transfer.

Option B: 18-month CD at 3.90% APY. Locked until maturity. 18 months of interest at 3.90% on $50,000 is approximately $2,950 nominal. After tax, approximately $2,095. Liquidity: locked, with an early-withdrawal penalty of approximately 6 months of interest ($975) if she withdraws early.

Option C: 26-week T-bills laddered (renewing 2 times). Yield approximately 3.60% per cycle, so cumulative yield approximately 3.60% per period. State-tax exempt, federal-taxable. Approximately $2,720 nominal interest over 18 months. After 24% federal tax only, approximately $2,070. Liquidity: locked until each bill matures (26 weeks), so dollars accessible at the maturity dates.

Option D: Money market account at 3.20% APY. Variable, lower than HYSA. 18 months at 3.20% is approximately $2,420 nominal. After tax, approximately $1,720. Check-writing available but Emma does not need it.

Ranking by after-tax yield: B (CD) ≈ C (T-bills) > A (HYSA) > D (MMA). The CD and T-bill ladder are roughly tied on after-tax yield. The CD locks the rate for the full 18 months, which is a guaranteed return; the T-bill ladder rolls every 26 weeks at the then-current rate, so the cumulative return depends on what rates do during the period. If rates fall over 18 months, the CD wins. If rates rise, the T-bill ladder catches up at each renewal.

For Emma’s specific case — 18 months, no need for the funds in the interim, willing to lock — the 18-month CD captures the highest certainty-adjusted return. If her timeline were more uncertain (say, between 6 and 24 months depending on her next purchase), the T-bill ladder captures most of the yield without locking the full term; she could decline to renew when the funds are needed. The HYSA is the lowest-friction choice that leaves her fully liquid, with a small yield cost.

The MMA does not win on any dimension for Emma’s case because she does not need the check-writing access. For a consumer who does — say, a small business operator parking working capital that occasionally needs to write a vendor check — the MMA can be the right choice despite the lower yield.

Sources and how we cite

• HYSA, CD, MMA APY ranges: tracked weekly at Bankrate’s deposit rate tables and at DepositAccounts.com. The ranges quoted on this page reflect typical top-tier offers in mid-2026; specific rates change continuously.
• T-bill yields and auction schedule: TreasuryDirect — Auction calendar and Treasury — Daily Treasury Par Yield Curve.
• FDIC insurance mechanics and limits: FDIC — Deposit Insurance.
• Federal Regulation D suspension (April 2020): Federal Reserve Board — Interim final rule on Regulation D.
• State-tax exemption on US Treasury interest: IRS Publication 550, the canonical reference for investment income tax treatment.

Yield numbers on this page are typical ranges as of mid-2026 and will change. For current rates, use the linked rate-tracking sources before any decision; for the FDIC and tax mechanics, the federal sources above are authoritative and stable.