Most balance transfer advice assumes you are choosing between bank cards. Credit unions are a different kind of lender, and for someone carrying debt the difference is not marketing. It is a legal cap on what they can charge you.
The 18% ceiling
The Federal Credit Union Act sets a ceiling on the interest rate federal credit unions can charge on loans. The statutory default is 15%, and the NCUA Board has the authority to raise it temporarily when market conditions warrant.
It currently sits at 18%. In February 2026 the NCUA Board voted to extend “a temporary 18-percent interest rate ceiling for loans made by federal credit unions” through September 10, 2027. (Source: NCUA)
Put that next to the cards in the rest of this site. Chase’s variable APRs currently start at 18.24%. Plenty of bank cards run to 29.99%. A federal credit union cannot go above 18% while the current ceiling stands.
Two limits worth being precise about:
- It applies to federal credit unions. State-chartered credit unions are governed by their own state’s rules, which may differ.
- The NCUA release refers to “loans” generally. It does not spell out credit card lines specifically, so confirm the ongoing APR with the credit union before you apply rather than assuming.
Why this matters more than the promotional rate
A balance transfer is usually sold on the length of the 0% period. That is the right thing to look at if you will clear the balance inside it.
If you will not, the rate that matters is the one that applies afterwards, and that is where credit unions separate from banks. A balance left over at 18% costs meaningfully less than the same balance at 26%. On $5,000, that gap is roughly $400 a year.
The tradeoff is that credit unions often run shorter promotional periods than the longest bank offers, and some run none at all. A bank card at 21 months of 0% may well beat a credit union at 18% ongoing, if you can clear it in time. Work out your payment first. The page on how to choose a balance transfer card covers that arithmetic.
You have to be eligible to join
Credit unions are membership organizations, not open-market lenders. Every one has a field of membership: an employer, an industry, a geographic area, a family relationship to an existing member, or membership of an associated organization.
This is less restrictive than it sounds. Many credit unions have broad community charters, and some allow membership through a small donation to a partner nonprofit. But you have to join before you can borrow, and joining usually means opening a share account with a small minimum deposit.
Build that into your timeline. If you are moving a balance to escape a rate that resets next month, the joining step is not instant.
Why credit union rates sit lower
The rate difference is structural, not promotional.
A credit union is a not-for-profit financial cooperative owned by the people who bank there. Depositors are members, and members are the owners. There is no external shareholder expecting a return on the interest you pay, so surplus goes back into rates and fees rather than out to investors.
That is the mechanism behind both the lower rates and the 18% ceiling rarely being approached in the first place. It is also why the gap tends to show up most clearly on the ongoing APR rather than on promotional offers: a credit union has less reason to run a loss-leading 0% period to win a customer it then hopes to charge 26%.
Where credit unions are weaker
Being straight about this matters more than selling the category.
- Shorter promotional periods. The longest 0% balance transfer offers are almost always bank cards.
- Smaller card selection. A credit union typically offers one or two cards, not a range.
- Less developed digital tools. Varies enormously, but a small credit union will not match a national issuer’s app.
- Membership friction. You have to qualify and join before you can apply.
- Transfer fees still apply. Being a credit union does not mean no balance transfer fee. Check it like you would anywhere else.
What to ask before you apply
- What is the ongoing APR after any promotional period, and is this a federal or state-chartered credit union?
- Is there a promotional rate on balance transfers, and how long does it run?
- What is the balance transfer fee, as a percentage and as a minimum dollar amount?
- What is the field of membership, and do I qualify?
- How long does joining take, and what is the minimum deposit?
- Is there a cap on how much I can transfer?
Common questions
Are credit union credit cards always cheaper than bank cards?
No. Federal credit unions are capped at 18% while the current NCUA ceiling stands, which puts a ceiling on how bad the ongoing rate can get. But a bank card with a long 0% promotional period can cost less overall if you clear the balance inside it.
Can I transfer a balance to a credit union card before I am a member?
No. You have to join first, which means qualifying for the field of membership and usually opening a share account.
Does the 18% cap apply to every credit union?
It applies to federal credit unions. State-chartered credit unions follow their own state’s rules. Ask which charter you are dealing with.
Do credit unions charge balance transfer fees?
Many do. Being member-owned does not automatically mean no fee. Ask for the percentage and the minimum.
Is my money safe at a credit union?
Deposits at federally insured credit unions are covered by the National Credit Union Share Insurance Fund, administered by the NCUA, to the same $250,000 standard limit as FDIC coverage at banks.