Openbank's High Yield Savings: 4.00% APY, Plus a 6-Month Boost to 4.35%

If you're hunting for a solid place to park cash, Openbank's High Yield Savings is worth a look. The standard rate sits at 4.00% APY, and new customers can grab a limited-time 0.35% boost that brings the yield to 4.35% APY for the first six months. After that, the boost expires and you're back to the standard variable rate, which is currently 4.00%. Openbank is part of Santander Bank, N.A., so deposits are FDIC insured. There's no minimum balance to earn interest, but you do need $500 to open the account.

The Rate: 4.00% Standard, 4.35% With the New-Customer Boost

Here's the headline: Openbank's High Yield Savings currently pays 4.00% APY on all balances. That's already competitive — roughly 10x the national average, according to the bank.

New customers can do better. A limited-time offer adds a 0.35% APY boost for the first six months, bringing the effective rate to 4.35% APY. The boost applies from the day you open the account, and it stays put for those six months even if the standard variable rate moves up or down.

Once the six months are up, the boost disappears and your rate reverts to whatever the standard variable APY is at that time. Right now that's 4.00%, but it's variable, so it could be higher or lower by then.

What You Need to Open One

The account is available nationwide, so you don't have to live in a particular state. But there are a few boxes to check before you apply.

You'll need to be at least 18, have a U.S. mobile phone number, and own a smartphone that can run the Openbank app. That phone becomes your "trusted mobile device" — the bank uses it for identity verification and account access. You also need to be a U.S. citizen or resident alien with a valid U.S. residential address.

The minimum opening deposit is $500. After that, there's no minimum balance requirement to earn interest — even a penny earns the stated APY. No monthly fees, either.

• At least 18 years old
• U.S. citizen or resident alien with a valid U.S. address
• Active U.S. mobile phone number
• Smartphone with the Openbank app installed
• $500 minimum initial deposit

The Fine Print on That Boost

The 0.35% boost is for new customers only and runs for six months from the date the account is opened. It's added on top of the standard variable APY, so if the standard rate changes during those six months, your boosted rate changes with it — you just keep the extra 0.35%.

After the promotional period ends, the boost goes away permanently. There's no action required on your part; the rate simply reverts to the standard variable APY. Since that rate can change at any time, it's smart to check in around the six-month mark and decide whether the account still makes sense for you.

FDIC Insurance and How It Works With Santander

Openbank is a division of Santander Bank, N.A., which is FDIC insured. That means your deposits are covered up to $250,000 per depositor, per ownership category.

One thing to keep in mind: deposits at Openbank and Santander Bank are combined for FDIC insurance purposes. They're not separately insured. So if you already have money at Santander, make sure your total deposits across both stay within the coverage limits.

A Few Practical Things to Know

This is a savings account, not a checking account. There are no checks or debit cards, so it's meant for accumulating savings rather than everyday spending. Transfers in and out happen electronically.

The account is app-centric. You'll use the Openbank mobile app for most things, and your trusted mobile device is required for identity verification even if you bank online. If you're not comfortable with app-based banking, this might not be the best fit.

Rates are variable. The 4.00% standard APY can change at any time, and the 4.35% boosted rate is only guaranteed for six months. Don't treat either as locked in for the long haul.

The $500 opening deposit is higher than some competitors, so it's worth checking whether you'd rather start with a smaller amount elsewhere. And as always, compare the rate against other high-yield savings accounts before committing — a few basis points can add up.

Bottom Line

• Openbank High Yield Savings pays 4.00% APY, with a limited-time 0.35% boost for new customers that brings it to 4.35% APY for six months.
• The boost expires after six months and the rate reverts to the standard variable APY, currently 4.00%.
• You need $500 to open the account, but there's no minimum balance to earn interest and no monthly fees.
• Openbank is part of Santander Bank, N.A., so deposits are FDIC insured up to $250,000 per depositor, per ownership category.
• The account is app-based and requires a trusted mobile device for access and verification.

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