At many credit unions, you cannot open anything until you first open one specific account: the primary savings account. A deposit of as little as $5 into it makes you a member and, at a credit union, a part owner.
A primary savings account is the base savings account that anchors your relationship with a bank or credit union. It is sometimes called a primary share account, a regular share account, or simply your main savings. Understanding it clears up a lot of confusion about how these institutions work.
What a primary savings account means
The word primary signals that this is your foundational account, the one everything else attaches to. Additional accounts, like checking, certificates, or a second savings, branch off from it.
At a credit union, the word share matters too. Because members collectively own the credit union, your savings balance represents your share of ownership, which is why the account is often called a share account.
Why credit unions require one
Opening a primary share account is how you become a member of a credit union. Membership comes with ownership rights, including a vote in how the institution is run.
Many credit unions ask you to keep a small minimum, often $5 to $25, in the account at all times. That balance keeps your membership active even if you rarely touch the money.
Key facts at a glance
Banks use the term differently. To make it concrete, here is how a primary savings account looks at Arvest Bank, one commonly searched example, as of July 2026.
| Feature | Arvest Savings Account (as of July 2026) |
|---|---|
| Minimum to open | $100 |
| Monthly fee | $2, waived with $100 daily or $500 average daily balance |
| Interest | Paid quarterly on balances of $100 or more; APY varies by balance tier, confirm current rate |
| Withdrawals | Up to 6 free per month, then $5 per additional withdrawal |
Figures come from Arvest's published savings details. Arvest does not publish a fixed headline APY, so verify the current rate on its rate chart before opening.
How it differs from a checking account
A primary savings account is built to hold money, while checking is built to spend it. Savings typically pays interest and may limit certain withdrawals, and checking offers a debit card and unlimited transactions.
Most people use both together. The savings account stores your cushion, and checking handles day-to-day bills and purchases.
Typical fees and minimums to expect
The two costs to watch are minimum balance requirements and monthly service fees. Many accounts waive the fee if you keep a set balance or link a checking account.
Credit union share accounts tend to have very low minimums, sometimes just $5. Bank savings accounts more often carry a small monthly fee that a modest balance can waive.
Alternatives if you want a higher rate
A base primary savings account often pays a low rate, since its main job is to establish your account relationship. If earning more matters, you can pair it with a higher-yield option. Current offers savings features that can pay a competitive rate on eligible balances alongside a real-time spending account.
Current Banking
Current Banking
Current is a mobile-first banking app with no monthly fee and no minimum balance. Members can earn up to 4.00% APY with a qualifying direct deposit of $200, receive direct-deposit paychecks up to 2 days early, and overdraft up to $200 fee-free.
Standout feature
4.00% APY on Savings Pods (with a $200+ qualifying direct deposit) plus paycheck up to 2 days early — both included on the standard account for free
Fees
Free
Pros
$0 monthly fee; up to 4.00% APY on Savings Pods with qualifying direct deposit; paycheck up to 2 days early;
Cons
No physical branches
For savers who want to avoid balance minimums entirely, Chime offers an automatic savings account with no minimum balance and no monthly fee, which sidesteps the small charges that some primary savings accounts carry.
Chime
Chime
- Fee-free banking plus early pay access (up to 2 days early with direct deposit)¹ - Overdraft up to $200 without fees for eligible members¹ - 5% cash back on category of choice (with qualifying direct deposit)¹ - 3.75% APY on your savings¹
Standout feature
No credit check, no interest, no annual fee, and no minimum deposit required.
Fees
$0
Pros
Fee-Free Banking and Get paid up to 2 days early
Cons
App/online-only support, no branches
How to use your primary savings account well
Treat it as the anchor, not the workhorse. Keep the required minimum in it, then route extra savings to whichever account pays the most.
Automating a small monthly transfer into it also keeps the account active and your cushion growing. Monarch Money can track every account in one place, so your primary savings, checking, and any high-yield accounts stay visible together. Terms and conditions apply, and rates and fees vary by institution.
Monarch Money
Monarch Money
Monarch Money simplifies personal finance by uniting all your accounts in one place—secure, ad-free, and built for couples. 50% off your first year when you sign up via Firstcard!
Standout feature
#1 rated budgeting app (WSJ). 50% off first year via Firstcard.
Fees
$14.99/mo or $99.99/yr ($8.33/mo)
Pros
Beautiful, ad-free interface (4.9★ App Store). Best budgeting app for couples and families. Comprehensive account syncing and cash flow forecasting.
Cons
No free tier — requires paid subscription.
Frequently Asked Questions
What is the difference between a primary savings account and a regular savings account?
At a credit union, a primary savings account, or primary share account, is the base account that establishes your membership, and a regular savings account can refer to that same account or an additional one. At a bank, primary savings usually just means your main savings account. The core function of holding money and paying interest is the same.
Do I have to keep money in a primary savings account?
Usually yes, at least a small minimum. Credit unions often require $5 to $25 to keep your membership active, and banks may charge a monthly fee unless you maintain a set balance.
Why is it called a share account at a credit union?
Because members collectively own the credit union, your savings balance represents your share of that ownership. Opening a primary share account makes you a member and a part owner with voting rights.
Can a primary savings account be my only bank account?
It can, but it is not ideal for daily spending, since savings accounts are built to hold money rather than move it. Most people pair a primary savings account with a checking account that offers a debit card and unlimited transactions.
