Most high yield savings accounts have no minimum opening deposit
You can open a high yield savings account with $0 to $1 in most cases. Banks like Marcus, Ally, American Express Personal Savings, and Discover have no stated minimum balance requirement to create an account. Some regional banks and credit unions do require a minimum — typically $25 to $500 — but the majority of online banks that offer competitive rates do not.
The confusion comes from mixing up two different things: the cost to open the account (nothing) and the cost to earn the advertised rate (usually nothing either, but sometimes a small balance threshold). A bank might advertise 4.50% APY but only pay that rate on balances above $1,000, or on all balances with no floor at all. You need to check the specific bank's terms, not assume.
Key Takeaways
- Most online banks charge nothing to open a high yield savings account and have no minimum deposit requirement.
- Some banks pay their advertised rate on any balance, while others require you to hold a minimum amount (often $1,000 to $25,000) to earn the full rate.
- Monthly maintenance fees are rare at online banks but common at brick-and-mortar banks; read the fee schedule before funding the account.
- The real cost is opportunity cost: keeping money in a low-rate account or under a mattress while waiting to move it costs you interest you could have earned.
Where the actual costs hide: maintenance fees and rate tiers
Opening is free, but some banks charge monthly maintenance fees ($5 to $15) if your balance falls below a threshold or if you don't meet other conditions. Online banks almost never do this. Brick-and-mortar banks and some credit unions do, so if you're considering a local institution, ask directly whether there's a monthly fee and what triggers it.
The second hidden cost is rate tiering. A bank might advertise 4.50% APY but only pay that on balances of $25,000 or more. Below that, you might earn 4.00% or 3.50%. This is legal and common. Before you open, search the bank's website for "rate tiers" or "balance tiers" or call and ask: "What rate do I earn on a $5,000 balance?" Get the answer in writing if possible.
Banks with genuinely no minimums and no fees
Marcus by Goldman Sachs, Ally Bank, American Express Personal Savings, and Discover Bank all advertise no minimum balance to open and no monthly fees. Their rates apply to all balances, from $1 upward. These are the straightforward choice if you want to avoid surprises.
Credit unions sometimes offer high yield savings too, but they often require membership (which might mean living or working in a certain area, or joining an affinity group). Membership is usually free or very cheap, but it's an extra step. Check whether your employer or a professional association you belong to has a credit union partnership.
What happens if you open with $0 and fund it later
You can open most online accounts with no money and fund them days or weeks later. The account sits dormant and earns nothing until you transfer money in. Some banks have a policy that accounts inactive for 12 months or longer may be closed, but this is rare and usually only happens if you never funded the account at all.
The practical timeline: open the account (5 to 10 minutes online), receive your account and routing numbers (usually instant, sometimes within 24 hours), then transfer money from your checking account via ACH (1 to 3 business days). You start earning interest the day the money lands, not the day you open the account.
The real cost: money sitting in a low-rate account while you decide
If you have $10,000 in a checking account earning 0.01% APY while you're deciding whether to open a high yield account earning 4.50%, you're losing roughly $450 per year. That's the actual cost of delay. The account itself costs nothing to open, but waiting costs money.
This is why the decision matters less than the speed of it. Open the account today with $1 if you want, move your money tomorrow, and start earning. There's no penalty for opening and funding slowly, and no benefit to waiting.
Comparing the true cost across account types
| Account Type | Opening Cost | Minimum Balance | Monthly Fee | Rate on $5,000 |
|---|---|---|---|---|
| Online high yield savings (Marcus, Ally, Discover) | $0 | $0 | $0 | 4.25%–4.50% |
| Credit union high yield savings | $0 (membership free or $5–$25) | Varies, often $0–$500 | $0–$5 | 3.50%–4.75% |
| Bank savings account (brick-and-mortar) | $0 | $500–$2,500 | $5–$15 | 0.01%–1.50% |
| Money market account (online) | $0 | $0–$2,500 | $0 | 4.00%–4.75% |
What to verify before you fund the account
After you open, before you move significant money, confirm three things: the current APY (rates change weekly), whether that rate applies to your balance size, and the FDIC insurance limit. FDIC insurance covers up to $250,000 per depositor per bank, so if you have more than that, you'll need multiple banks or a money market account at a brokerage.
Check the bank's website for the current rate and the terms. If the website shows a rate but doesn't say whether it applies to all balances or only balances above a certain amount, call or email and ask. Get the answer before you transfer money.
Frequently Asked Questions
Do I have to keep a minimum balance after I open?
At most online banks, no. Marcus, Ally, and Discover have no minimum balance requirement to keep the account open or to earn the advertised rate. Some credit unions and regional banks do require a minimum (often $500 to $2,500) to earn the full rate or to avoid a monthly fee. Check the specific bank's terms before opening.
Can I open an account and not fund it for months?
Yes. Most banks allow you to open an account and leave it unfunded indefinitely. However, some banks close accounts that remain inactive (no deposits, withdrawals, or transfers) for 12 months or longer. If you plan to open and wait, fund it with at least $1 within a few months to keep it active.
What if the rate drops after I open?
Rates on high yield savings accounts are variable, meaning the bank can lower them at any time without your permission. You don't have to close the account if the rate drops, but you can move your money to a different bank offering a higher rate. There's no penalty for transferring money out.
Is there a cost to transfer money out later?
No. Online banks do not charge fees to transfer money out via ACH to another bank account. Some banks limit the number of transfers per month (often six), but there's no dollar cost. If you need to withdraw cash, you can transfer to your checking account first, then withdraw from an ATM.
Do I need a separate checking account to open a high yield savings account?
No. You can open a high yield savings account at any bank, even if you bank elsewhere. You'll need a way to fund it (usually a transfer from another bank account or a wire transfer), but you don't need a checking account at the same institution.