First Interstate Bank is going big with their fall promotion, offering up to $600 in bonuses for new customers who open both checking and savings accounts. This regional bank serves 12 western states, and their current offer splits the rewards: $300 for checking account activity and $300 for a substantial savings deposit.
What makes this promotion interesting is the flexibility—you can pursue either bonus individually or stack them for the full $600. The checking bonus rewards regular banking activity, while the savings bonus targets customers with significant deposits. For residents in their western footprint, this represents one of the larger regional bank bonuses available.
Want the best bank bonuses nationwide? Check out our top picks here—including huge offers from BMO, CIT Bank and Axos Bank that you won’t want to miss!
How First Interstate’s $600 Bonus Works
The promotion offers two separate $300 bonuses that can be combined:
Checking Account Bonus ($300):
- Open checking account with code FALL25BONUS by November 21, 2025
- Complete 3+ electronic deposits of $500+ each within 90 days
- Bonus paid within 45 days after qualification period ends
Savings Account Bonus ($300):
- Open savings account with code FALL25BONUS by November 21, 2025
- Deposit $10,000 within 30 days of opening
- Maintain $10,000 balance for 90 consecutive days (starting day 31)
- Bonus paid within 45 days after 90-day maintenance period
Total Possible: $600 (if you complete both promotions)
Both require $25 minimum opening deposits and use of the bonus code.
Trending Savings Account Deal:
What Counts as Qualifying Activities
First Interstate is specific about their requirements:
Checking Electronic Deposits (3 deposits of $500+ each):
- Payroll direct deposits
- Government benefits
- Pension payments
- ACH transfers from external banks
- Transfers from other First Interstate accounts don’t qualify
Savings Deposit Requirements:
- $10,000 in “new to First Interstate” funds
- Must be deposited within 30 days of account opening
- 90-day maintenance period begins on day 31
- Cannot come from existing First Interstate accounts
The checking bonus requires $1,500 total in electronic deposits over 90 days, while savings needs $10,000 upfront.
Trending Checking Account Deal:
The Geographic Coverage
First Interstate operates in 12 western states: Colorado, Iowa, Idaho, Minnesota, Missouri, Montana, North Dakota, Nebraska, Oregon, South Dakota, Washington, and Wyoming.
This is true regional banking with local branches and decision-making, which can mean better customer service and more flexible lending compared to national banks.
The Real Value Analysis
Let me break down what each bonus delivers:
Checking Bonus Value:
- $300 bonus (roughly $210-240 after taxes)
- Requirements: $1,500 in electronic deposits over 90 days
- Time investment: 30 minutes account opening + deposit setup
Savings Bonus Value:
- $300 bonus (roughly $210-240 after taxes)
- Requirements: $10,000 deposit maintained for 90+ days
- Opportunity cost: ~$100-125 in lost high-yield savings interest
Combined Value:
- $600 total bonuses (roughly $420-480 after taxes)
- Requires both $1,500 in deposits and $10,000 in savings
- Net value after opportunity costs: $320-380
Account Options and Features
Checking Account Options:
- Simple Banking
- Basic Checking
- Select Checking
- Premier Checking
Standard Features:
- Debit card included
- Online and mobile banking
- Bill pay services
- Zelle payments
- Branch access across 12 states
Savings Account:
- Regular Savings account
- Standard savings features and rates
- Online and mobile access
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The Smart Strategy
If you’re pursuing both bonuses:
Week 1: Open both accounts with code FALL25BONUS and make minimum deposits
Week 2: Deposit $10,000 into savings and set up checking direct deposits
Month 1-3: Complete 3 electronic deposits of $500+ each for checking
Month 2-4: Maintain $10,000 savings balance for 90 consecutive days
Month 4-5: Receive both bonuses and evaluate long-term banking needs
The timelines overlap, so careful planning ensures you meet both sets of requirements.
Who Should Consider This Bonus
This makes sense if:
- You live in one of their 12 western states
- You have $1,500+ in regular electronic deposits
- You have $10,000+ available for savings deposit
- You want regional banking with local branch access
- You can meet both sets of requirements simultaneously
Skip this if:
- You’re outside their geographic footprint
- You don’t have reliable electronic deposits
- You can’t tie up $10,000 for 90+ days
- You prefer online-only banks with higher savings rates
- You’re not comfortable with the complexity of dual requirements
Checking Bonus Only Strategy
If $10,000 is too much for savings:
Requirements: Just 3 electronic deposits of $500+ each over 90 days
Value: $300 bonus for $1,500 in deposits
Timeline: 90 days to complete, 45 days for bonus payment
This makes the offer accessible to more customers who can’t meet the savings requirements.
See the Best Checking & Savings Account Bonuses and Start Earning Free Cash Today
The Bottom Line
First Interstate’s $600 bonus is one of the larger regional bank offers available, but it requires significant deposits to maximize. The checking bonus alone is reasonable for most customers, while the full $600 targets those with substantial savings.
Regional banks like First Interstate often provide better customer service and more flexible lending than national banks. If you’re in their footprint and can meet the requirements, this bonus could be the start of a valuable banking relationship.
Ready to earn up to $600? Remember the November 21, 2025 deadline and use code FALL25BONUS for both accounts. The checking bonus is accessible to most customers, while the savings bonus requires serious money but offers serious rewards.
The dual-bonus structure lets you choose your level of participation, making this flexible for different customer needs and financial situations.
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