- Balance over $5,000: APY 4.25%* with 11x Multiplier²
- Balance less than $5,000: APY 0.75%* (Multiplier Not Applicable)
- Needs to use promo code to qualify: Boost50
- Boost lasts 6 months over standard APY
- Tiered account
- $100 minimum account opening
- Member FDIC
- No Monthly Service fees
- No account opening fees
Disclosures:
¹Platinum Savings is a tiered interest rate account. Interest is paid on the entire account balance based on the interest rate and APY in effect that day for the balance tier associated with the end-of-day account balance. APYs — Annual Percentage Yields are accurate as of July 1, 2026: 0.25% APY on balances of $0.01 to $4,999.99; 3.75% APY on balances of $5,000.00 or more. Interest Rates for the Platinum Savings account are variable and may change at any time without notice. The minimum to open a Platinum Savings account is $100.
²Based on comparison to the national average Annual Percentage Yield (APY) on savings accounts as published in the FDIC National Rates and Rate Caps, accurate as of September 21, 2026.
*This is a limited time offer available to New and Existing customers who meet the Platinum Savings APY Boost promotion criteria.
Accounts enrolled in the Platinum Savings Annual Percentage Yield (APY) Boost promotion will receive a 0.50% APY boost on the Platinum Savings current standard APY tiers for 6 months following the opening of a new account or when an existing Platinum Savings account is enrolled in the promotion. The Platinum Savings APY boost will be applied on account balances up to $9,999,999.00. Account balances above $9,999,999.00 will earn the standard APY. If the standard-published APY should change during the promotion period, the APY boost will move with it, offering an account APY above the standard rate.
The Promotion begins on September 29, 2026, and ends December 15, 2026. Customers enrolled in the promotion prior to the end date will receive the APY boost for the 6-month period outlined in the terms and conditions.
The promotion can end at any time without notice.
CIT General Disclosure:
For complete list of account details and fees, see the
Personal Account disclosures.
Costco 
