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We will be performing systems upgrades on October 24, 2026.  It is possible you may experience service interruptions to online, mobile, and telephone banking.

We apologize for any inconvenience to you.

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Deposit Rates

Account Type ¹ Minimum Balance To Open Minimum Average Daily Balance to Earn APY Annual Percentage Yield (APY) ²
Main Share/Misc Share
$5
$5 - $499.99
0.03%
 
 
$500 - $9,999.99
0.05%
 
 
$10,000 - Above
0.10%
 
Money Market
$10
$10 - $2,499.99
0.05%
 
 
$2,500 - $9,999.99
0.15%
 
 
$10,000 - $19,999.99
0.35%
 
 
$20,000 - $49,999.99
0.50%
    $50,000 - $99,999.99 0.60%
    $100,000 - $249,999.99 0.80%
    $250,000 - ABOVE 0.80%
 
I.R.A Share
None
$0 - $499.99
0.03%
 
 
$500 - $9,999.99
0.05%
 
 
$10,000.00 - Above
0.10%
 
NOW Checking
None $5
0.03%
 
Vacation Club
None
None
0.05%
 
Christmas Club
None
None
0.05%
 
Business Share
$25
$25 - $499.99
0.03%
 
 
$500 - $9,999.99
0.05%
 
 
$10,000 - Above
0.10%
 
 
 
 
Certificates Term ⁴ 
Minimum Balance To Open
Minimum Average Daily Balance To Earn APY
Annual Percentage Yield (APY) 
3 Months
$500
$500
2.75%
6 Months  
$500
$500
3.75%
10 Months  $500 $500 4.11%
12 Months 
$500
$500
3.50%
14 Months 
$500
$500
4.44%³
16 Months 
$500
$500
3.00%
17 Months 
$500
$500
4.40%
18 Months 
$500
$500
4.00%
24 Months   
$500
$500
4.25%
28 Months
$500
$500
2.65%
36 Months
$500
$500
3.45%
48 Months
$500
$500
3.00%
60 Months
$500
$500
3.35%
IRA Certificates Term ⁴
Minimum Balance To Open
Minimum Average Daily Balance To Earn APY
Annual Percentage Yield (APY) 
3 Months
$500
$500
2.75%
6 Months 
$500
$500
3.75%
10 Months  $500 $500 4.11%
12 Months 
$500
$500
3.50%
14 Months 
$500
$500
4.44%³
16 Months 
$500
$500
3.00%
17 Months 
$500
$500
4.40%
18 Months
$500
$500
4.00%
24 Months 
$500
$500
4.25%
28 Months
$500
$500
2.65%
36 Months
$500
$500
3.45%
48 Months
$500
$500
3.00%
60 Months
$500
$500
3.35%

¹ Fees may reduce earnings.
² Rates are subject to change without notice. 
³ This is a limited time offer and is subject to change without notice. To qualify for this rate, at least 50% of the funds deposited by members must be new money. New money is defined as funds not currently on deposit with Mass Bay Credit Union.
⁴Certificates may be subject to penalty for early withdrawal. This account type has a $250,000 maximum deposit per Member.

All rates subject to membership eligibility, see our website for details.

 

Current Rates - Effective October 16, 2026.

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