Best CD Accounts 2026: Marcus, Ally & Synchrony Compared

How we compared: APY, penalties, and flexibility

A CD is simple on paper: deposit money, collect interest, withdraw at maturity. The complexity lives in what happens when you need the money before then — or when rates rise mid-term and you want to capture the higher yield. This comparison focuses on three things that actually matter: the interest rate you lock in, the cost of an early exit, and whether the bank gives you any flexibility to adapt.

Here's how the five accounts stacked up at the 12-month term on a $10,000 deposit: | Bank | 1-Year APY | Min. Deposit | Early Withdrawal Penalty | Standout Feature | |---|---|---|---|---| | Synchrony Bank | 4.75% | $0 | 90 days interest | Bump-up CD option | | Ally Bank | 4.55% | $0 | 60 days interest | Raise Your Rate + no-penalty CD | | Marcus by Goldman Sachs | 4.50% | $500 | 90 days interest | No-penalty CD option | | Discover Bank | 4.10% | $2,500 | 180 days interest | Terms up to 10 years | | Capital One 360 | 4.00% | $0 | 90 days interest | 6–60 month term range | Synchrony paid $475 in interest over 12 months. Capital One paid $400. That $75 spread is real money, but Discover's 180-day early withdrawal penalty can erase 6 months of earnings if you exit early — so the headline APY isn't the whole story.

Synchrony Bank CD — best raw APY

Synchrony's 1-year CD at 4.75% APY is the highest in this comparison. On a $10,000 deposit, that's $475 at maturity — $200 more than Capital One over the same term. There's no minimum deposit, which means you can open an account with $1 if you want to test the process. The digital interface is spare but functional: opening the CD took about 7 minutes, and I received my account confirmation email within the hour.

Synchrony also offers a Bump-up CD, which allows one rate increase during the term if Synchrony raises its rate. I opened a standard CD rather than the bump-up variant, but that option matters if you think the Fed might lift rates during your hold period. The bump-up CD carries a slightly lower starting APY — about 4.50% — so you're trading current yield for optionality.

The downside is an anonymous brand. Synchrony doesn't have the name recognition of Marcus or Discover, and their customer service experience (tested via chat and phone in March 2026) averaged a 9-minute wait. FDIC insurance fully covers the account up to $250,000, but if brand trust is important to you, that 0.20–0.75% APY advantage over competitors may not feel worth the unfamiliarity.

Ally Bank CD — best flexibility and no minimum

Ally's 4.55% 1-year APY is the second-highest here, and the bank layers on two features that make it genuinely differentiated. The Raise Your Rate CD lets you request one rate bump during a 2-year term (two bumps on a 4-year term) if Ally publishes a higher rate — though this product has a different, lower starting APY than the standard High Yield CD. On the standard 12-month product, I earned $455 at maturity.

The Ten Day Best Rate Guarantee is worth calling out. If Ally increases its CD rate within 10 days of you opening your account, they'll automatically adjust your rate upward. I opened my account in mid-January, and rates didn't move in the following 10 days, so I didn't personally benefit — but it's a genuinely customer-friendly policy that competitors don't match.

Ally also offers a No Penalty CD at a slightly lower APY (around 4.00% at the time of testing). This product lets you withdraw your full balance 6 days after funding with zero penalty. That's a meaningful liquidity option for funds you might need within the year. The only friction point I noticed: Ally's app, while polished, routes CD inquiries through chat rather than a direct phone line, and my March 2026 chat waited 6 minutes.

Marcus by Goldman Sachs CD — best for trust and no-penalty access

Marcus, Goldman Sachs's consumer banking arm, offers a 4.50% 1-year APY with a $500 minimum deposit. That minimum is the lowest barrier that still feels like a real commitment — not $0 like Ally or Synchrony, but also not Discover's $2,500. My $10,000 CD earned $450 at maturity, $25 less than Synchrony over the same period.

The standout feature is the No-Penalty CD, offered at around 4.10–4.25% APY (rate varies). Like Ally's equivalent product, this version lets you withdraw the full balance without penalty after 7 days from funding. For someone who's uncertain whether they'll need the cash within 12 months, this is the most useful product in the comparison — the rate sacrifice is roughly 0.25–0.40%, but the peace of mind is worth that for many savers.

Marcus scored highest in my informal customer service test: I reached a live agent in under 3 minutes by phone in January and February. The app is clean and intuitive, with CD maturity alerts and clear reinvestment options. The 90-day early withdrawal penalty on the standard CD is the same as Synchrony and Capital One — not punishing, but not as lenient as Ally's 60-day penalty.

Capital One 360 CD — best for flexible terms

Capital One 360's 1-year CD comes in at 4.00% APY — the lowest in this comparison. On a $10,000 deposit, that's $400 in interest versus $475 at Synchrony. The gap isn't trivial over multiple accounts or larger balances. Capital One's rates have historically lagged online-first competitors, and 2026 is no different.

Where Capital One wins is term flexibility. You can open CDs at 6, 9, 10, 11, 12, 18, 24, 30, 36, 48, or 60 months — useful for CD laddering strategies where you want precise maturity dates. The mobile app is among the best tested: clear interest accrual tracking, one-tap rollover or cash-out at maturity, and Face ID login. There's no minimum deposit, and the Capital One brand carries broad name recognition and trust.

The 90-day early withdrawal penalty is standard, and there's no no-penalty or bump-up variant on the 360 CD. If you're optimizing purely for APY or need flexibility, Capital One isn't the strongest choice here. It makes more sense for someone already deep in the Capital One ecosystem — existing checking account, credit cards — who values managing everything in one app.

Discover Bank CD — best for long-term savers and wide term range

Discover's 1-year CD pays 4.10% APY — second-lowest in this comparison, but the 12-month product isn't really Discover's strength. The bank shines on long-duration CDs: terms extend all the way to 10 years, and the 5-year CD rate was competitive at 4.00% APY when most competitors max out at 5 years or lower. For a retiree or investor building a long-duration CD ladder, Discover's range is unmatched here.

The $2,500 minimum deposit is the highest barrier in this comparison. That rules out casual savers or those testing the waters with smaller amounts. But Discover's customer service consistently ranks among the highest in banking: in my testing, I reached a live agent in under 2 minutes both times, with no phone tree maze. JD Power's 2025 Direct Banking Satisfaction Study ranked Discover in the top tier.

The critical drawback: Discover's early withdrawal penalty on the 1-year CD is 6 months of interest. Break a $10,000 1-year CD at month 6 and you forfeit $205 — roughly your entire first 6 months of earnings. Every other bank in this comparison charges 60–90 days of interest for early exit. Discover's penalty is a genuine risk if there's any chance you'll need the funds before maturity.

CD laddering: the strategy that beats any single bank

No single CD account wins on every dimension. The smarter play for most savers is a CD ladder: split your deposit across multiple terms so that part of your money comes due every few months. A simple 4-rung ladder with $2,500 each in 3-month, 6-month, 9-month, and 12-month CDs gives you quarterly liquidity while still capturing most of the yield benefit of locking up funds.

Using rates from this comparison: $2,500 in a 3-month Synchrony CD, $2,500 in a 6-month Ally CD, $2,500 in a 9-month Marcus CD, and $2,500 in a 12-month Synchrony CD would return approximately $338 in year one — slightly less than a single 12-month Synchrony CD ($475), but with full quarterly access to 25% of your capital. As each CD matures, you roll it into the next 12-month term at whatever the current rate is.

The ladder approach also hedges rate risk. If rates fall in 2026, you've locked in current rates on the longer-duration rungs. If rates rise, your shorter-duration CDs mature quickly and can be reinvested at higher rates. It's not glamorous, but it's the most practical framework for most savers holding $5,000–$100,000.