For money you will not touch for more than a year, the best interest-bearing account is usually a 12- to 24-month certificate of deposit (CD) purchased directly from an FDIC-insured bank or NCUA-insured credit union. A CD locks a fixed rate for a fixed term, so it pays more than a liquid savings account while eliminating rate-cut risk. Treasury bills are the strongest alternative if you want state-tax relief or easier secondary-market access.
How fixed-term accounts actually generate yield
A bank creates a CD by borrowing your deposit for a defined period and lending it out at a higher rate. Because it knows the money will stay put, it pays you more than on a savings account, where deposits can leave at any moment. The interest rate is a price for your commitment, and the bank’s funding risk falls as the term lengthens, so the premium rises with duration, at least across the one-to-five-year band.
That term premium is not linear or guaranteed. It exists because the bank avoids the cost of constantly repricing deposits and finding replacement funding. The trade-off shifts the interest-rate risk onto you. If market rates climb after you buy, your locked rate becomes a below-market return with no escape except an early-withdrawal penalty.
The penalty is the core mechanism. A typical early-withdrawal penalty is three to twelve months of interest. It does more than tax your patience. It converts a fixed-rate account into an illiquid one, and it means that, in practice, your effective access horizon is the term length plus the penalty cost, not the maturity date alone.
What one-year money typically earns
The spread between a liquid savings account and a 12-month CD is real but modest. In a normal rate environment, the best nationally available 12-month CDs often pay roughly 0.3 to 0.8 percentage points more than the top high-yield savings accounts. On USD 30,000, a half-point advantage is about USD 150 over a year, before tax. That is meaningful but not transformative.
Longer terms pay more per year, but only up to a point. A 24-month CD often pays more than a 12-month CD, yet many banks price 36- and 60-month CDs lower than 24-month ones during periods of yield-curve inversion. The best one-year-plus choice is therefore a rate comparison, not a rule that more time equals more yield.
Treasury bills behave differently because they are sold at a discount and mature at face value. A bill maturing in 13 or 26 weeks is effectively a short CD with government backing. Interest is exempt from state and local income tax, but it is still subject to federal tax. This makes bills relatively more attractive for residents of high-tax states.
The counterintuitive detail is that the highest posted CD rate is not always the highest after-tax return. A 4.5% CD at a bank in a no-income-tax state can beat a 4.55% CD where you owe state tax on the interest, and a Treasury bill at a slightly lower headline yield can beat both for high earners in high-tax states. Compare after-tax yield, not the advertised number.
Comparison of fixed-term options
| Option | Typical term | Liquidity before maturity | Key risk | Notes for one-year-plus money |
|---|---|---|---|---|
| Bank CD (FDIC) | 12–60 months | Penalty; sometimes waived at death or disability | Locked rate if rates rise | Insured to USD 250,000 per depositor, per bank, per ownership category |
| Credit union share certificate (NCUA) | 12–60 months | Penalty | Locked rate | Same USD 250,000 insurance, separate institution category |
| Treasury bill | 4–52 weeks | Sellable on secondary market; price risk | Reinvestment rate risk | State-tax-exempt interest; auction or brokerage purchase |
| Treasury note | 2–10 years | Sellable; price risk | Interest-rate risk on resale | Coupon interest; state-tax-exempt |
| High-yield savings | None | Daily access | Rate can fall at any time | Not fixed; no term guarantee |
| Money market deposit account | None | Limited withdrawals | Rate can fall | Often tiered rates; check insurance |
| Brokerage CD | 12–60 months | Penalty or market sale depending on structure | Resale price risk if sold | Confirm FDIC pass-through coverage and call features |
Treasury bills and notes are backed by the full faith and credit of the US government, not by deposit insurance. A brokerage CD may be insured but sold through a broker, and its early-exit rules can differ from a bank’s. Read the specific terms before buying.
Timeline of a one-year commitment
| Point in time | What happens | What to watch |
|---|---|---|
| Purchase day | Rate is fixed; funds leave checking | Confirm the exact maturity date and penalty terms |
| Month 1–3 | Interest accrues at the locked rate | Verify the rate matches the disclosure |
| Mid-term | Opportunity cost becomes visible if market rates rise | Do not break the CD casually; calculate the penalty first |
| Month 9–11 | Renewal window opens at many banks | Automatic rollover often defaults to a lower rate |
| Maturity day | Principal plus interest is available | Set a calendar reminder 2–4 weeks ahead |
| Grace period (often 7–10 days) | You can move funds without penalty | Missing it can trigger an unwanted renewal |
| After renewal | The new term and rate apply | Re-shop rather than accept the default |
The grace period is the detail most people miss. Many banks automatically renew a maturing CD into a new term at the then-current rate, which may be far below what you could earn elsewhere. The fix is simple: track the maturity date and confirm the grace period length in writing when you open the account.
Common misconceptions and red flags
The most common misconception is that a CD is fully liquid because you can always withdraw. You can usually withdraw, but the penalty may exceed the interest earned, so early access can cost principal in real terms. Another is that a longer term always pays more, which fails during inverted yield curves.
A third misconception is that all deposit insurance is identical. FDIC and NCUA coverage is USD 250,000 per depositor, per institution, per ownership category, so spreading large balances across institutions matters. A fourth is that a brokered CD is risk-free: it carries deposit insurance but may have call features or market-sale risk.
Watch for these red-flag terms:
An early-withdrawal penalty that exceeds 12 months of interest, or one calculated on principal rather than interest. A call feature letting the bank redeem the CD early if rates fall, leaving you to reinvest at lower rates. A promotional rate that applies only to the first few months, then drops sharply. A brokered CD whose FDIC coverage you cannot confirm from the institution and brokerage. An automatic-renewal clause with no clear grace period or notice requirement.
The professional caveat is that rate shopping has a hidden cost: time and fragmentation. Chasing a few basis points across many institutions creates multiple tax documents and complicates insurance limits. For most savers, two or three well-chosen institutions beat a dozen marginal optimizations.
Practical steps and thresholds
Start with a liquidity check before buying anything. Confirm you have an emergency fund covering 3 to 6 months of expenses in a separately accessible account. Only money above that line belongs in a fixed-term product.
Then quantify the penalty before committing. Ask for the early-withdrawal penalty in dollars for a hypothetical early exit at month 3, 6, and 9. If the penalty would erase more than the interest you expect, the product is poorly suited to your timeline.
Compare after-tax yields across at least three options: a 12-month CD, a 24-month CD, and a Treasury bill or note. Use your marginal federal rate and state rate. Set a maturity reminder 30 days before the date, and verify the grace period in writing.
Thresholds worth stating plainly: keep fixed-term allocations within insured limits of USD 250,000 per institution per ownership category; prefer terms at or under 24 months for money needed in roughly 12 to 18 months; and treat any penalty above six months of interest as a signal to look elsewhere.
Limitations and what this cannot tell you
No account choice can predict future rates, and a locked rate that looks good today may lag the market tomorrow. Insurance protects against bank failure, not against opportunity cost. Tax treatment varies by jurisdiction and personal situation, and after-tax comparisons depend on your bracket.
This article is general educational information, not a diagnosis, treatment plan, legal opinion, or investment recommendation. It does not promise outcomes or returns. For decisions about your specific finances, consult a qualified local financial professional, and for immediate danger contact local emergency services.