Last updated: July 2026

6-Month CD Calculator

A 6-month CD is the shortest term that consistently earns a meaningful APY premium over a high-yield savings account — popular for short-horizon savings without a year-long lock-up.

Calculate a 6-Month CD

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Use the APY from your bank's offer — already includes compounding.

CD Term
6-Month CD (6 months)

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Maturity Value
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Matures on —
Initial Deposit —
Total Interest Earned —
APY —
Term 6-Month CD

Need an early-withdrawal penalty estimate or growth chart? Open the full CD calculator →

A 6-month CD commits funds for 26 weeks (about half a year) in exchange for a fixed APY. It is the most common short-term CD, sitting between no-penalty 3-month CDs and the standard 1-year term. The pitch: most online banks pay nearly the same APY on a 6-month CD as a 1-year, so you get most of the rate without locking up the money for a full year.

Common uses: parking a tax refund or year-end bonus, holding a deposit for a near-term purchase 4–6 months out, building the shortest rung of a CD ladder, or hedging cash that you might need but probably won't. A $10,000 6-month CD at 4.50% APY earns about $222.52 in interest — roughly half the 1-year return because compounding over half a year is roughly half of compounding over a full year.

6-Month CD Interest by Deposit and APY

Total interest earned (and maturity value) on a 6-month cd at common deposit sizes and APYs, calculated as Deposit × (1 + APY)0.5 − Deposit.

Deposit 4.00% APY4.25% APY4.50% APY4.75% APY5.00% APY
$1,000
$19.80
$1,019.80 total
$21.03
$1,021.03 total
$22.25
$1,022.25 total
$23.47
$1,023.47 total
$24.70
$1,024.70 total
$5,000
$99.02
$5,099.02 total
$105.14
$5,105.14 total
$111.26
$5,111.26 total
$117.37
$5,117.37 total
$123.48
$5,123.48 total
$10,000
$198.04
$10,198.04 total
$210.29
$10,210.29 total
$222.52
$10,222.52 total
$234.74
$10,234.74 total
$246.95
$10,246.95 total
$25,000
$495.10
$25,495.10 total
$525.72
$25,525.72 total
$556.31
$25,556.31 total
$586.86
$25,586.86 total
$617.38
$25,617.38 total
$50,000
$990.20
$50,990.20 total
$1,051.44
$51,051.44 total
$1,112.62
$51,112.62 total
$1,173.72
$51,173.72 total
$1,234.75
$51,234.75 total
$100,000
$1,980.39
$101,980.39 total
$2,102.89
$102,102.89 total
$2,225.24
$102,225.24 total
$2,347.45
$102,347.45 total
$2,469.51
$102,469.51 total

Top number: interest earned over the 6-month cd term. Bottom number: maturity value (deposit + interest). Linked deposit amounts open the deposit-anchored CD calculator page with full APY × term tables.

6-Month CD: Real Return After Inflation

At 4.50% APY on a $10,000 deposit, here is what a 6-month cd's nominal interest is worth after inflation eats some of the purchasing power. Real return uses the Fisher relation: (1 + APY) / (1 + inflation) − 1.

Inflation Assumption Real Interest Nominal Interest Real Maturity Value
2.5% (long-run CPI average) $97.09 $222.52 $10,097.09
3.0% (recent average) $72.55 $222.52 $10,072.55
3.5% (above-target) $48.19 $222.52 $10,048.19

Real interest = inflation-adjusted purchasing-power gain. Nominal interest is the dollar amount the bank credits. See the inflation calculator to model other rates.

6-Month CD Interest After Federal Tax

CD interest is taxed as ordinary income each year. Below: net interest earned on a 6-month cd at 4.50% APY after federal income tax at common marginal brackets, for several deposit sizes. State tax (where applicable) is on top of these numbers. Holding the CD inside a traditional IRA defers this tax until withdrawal.

Federal Bracket $10,000$25,000$50,000
12% bracket
$195.82
−$26.70 tax
$489.55
−$66.76 tax
$979.11
−$133.51 tax
22% bracket
$173.57
−$48.96 tax
$433.92
−$122.39 tax
$867.84
−$244.78 tax
24% bracket
$169.12
−$53.41 tax
$422.80
−$133.51 tax
$845.59
−$267.03 tax
32% bracket
$151.32
−$71.21 tax
$378.29
−$178.02 tax
$756.58
−$356.04 tax
35% bracket
$144.64
−$77.88 tax
$361.60
−$194.71 tax
$723.20
−$389.42 tax

Top number: net interest after federal tax. Bottom number: federal tax owed. Multi-year CD interest is taxed each year as it accrues.

When a 6-month CD makes sense

The 6-month term fits one situation particularly well: you have a known expense roughly half a year out, and you want more than a savings account pays without gambling on needing the money sooner. A closing date, a tuition bill, a planned purchase — anything with a date attached.

It is also the least painful way to try a CD for the first time. The commitment is short enough that being wrong about your timing costs little, and the rate is usually within a fraction of a point of the 1-year. If you find you never missed the money, the next rung up is an easy step.

Where it fits poorly: as a home for your emergency fund. An emergency does not wait 26 weeks, and the penalty on an early withdrawal in the first three months can eat into principal, so you could get back less than you put in.

6-month CD vs. a no-penalty CD

At this horizon the real competitor is not a longer CD — it is the no-penalty CD, which lets you withdraw the full balance without forfeiting interest, usually after the first week. The trade is rate: no-penalty CDs typically pay 0.25 to 0.50 percentage points less.

On $10,000 over six months, that gap is worth roughly $12 to $25. The standard 6-month CD's penalty for breaking early is about 90 days of interest, or roughly $112 at 4.50% APY. So the question is simple arithmetic: you are risking about $112 to earn about $20 extra.

That trade favours the standard CD only when you are genuinely confident about the timing. If there is real uncertainty, the no-penalty version costs you a small, known amount to remove a larger, unknown one.

6-Month CD: Frequently Asked Questions

How much does a 6-month CD earn? +

A 6-month CD earns deposit × ((1 + APY)^0.5 − 1) in interest. At 4.50% APY: $10,000 earns about $222.52, $25,000 earns $556.31, $50,000 earns $1,112.62, and $100,000 earns $2,225.24. At 5.00% APY: $10,000 earns about $246.95, $25,000 earns $617.38, $50,000 earns $1,234.75, and $100,000 earns $2,469.51. The 6-month return is just under half of what the same deposit would earn over a full year because compounding has only half the time to work.

Is a 6-month CD better than a high-yield savings account? +

A 6-month CD usually pays 0.10–0.50 percentage points more than a high-yield savings account at the same bank, in exchange for locking up the funds for 26 weeks. On $10,000 over 6 months, that's roughly $5–$25 of extra interest after compounding. The trade-off: HYSAs are fully liquid, while breaking a 6-month CD early triggers a penalty (typically 90 days of interest, or about $112 on a $10,000 CD at 4.50%). For money you might genuinely need, the HYSA usually wins; for money you're sure you won't touch, the CD wins on rate.

What is the early-withdrawal penalty on a 6-month CD? +

Most 6-month CDs charge 90 days (3 months) of interest as the early-withdrawal penalty. On a $10,000 6-month CD at 4.50% APY, that's about $112. Because the term is only 6 months, the penalty math matters: if you withdraw within the first 3 months, the penalty exceeds the interest accrued and the bank deducts the shortfall from your principal — your withdrawal can be less than the original deposit. No-penalty CDs in the 6-month range exist but typically pay 0.25–0.50 percentage points lower APY.

Should I open a 6-month CD or a 1-year CD? +

Pick based on when you'll need the money. If your time horizon is 4–6 months, the 6-month CD fits cleanly. If you can commit for a full year, the 1-year CD is usually the better choice because the APY is similar (often within 0.10 percentage points) but compounding over a full year lets the interest grow meaningfully more — about $450 vs $222 on a $10,000 deposit at 4.50% APY. A common compromise is to split the deposit across both: half in a 6-month, half in a 1-year, so half matures earlier and half captures the longer compounding window.

Are 6-month CD rates fixed or variable? +

Standard 6-month CDs are fixed-rate: the APY is locked at account opening for the full 26-week term, regardless of what happens to interest rates. A few banks offer "bump-up" CDs that allow one rate increase if the bank raises its CD rates during the term, but these usually start at a slightly lower base APY. Most savers stick with the standard fixed-rate 6-month CD because the term is short enough that locking in the rate isn't much of a commitment.

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