Some of the largest bank bonuses are not a single offer at all. They are a checking bonus and a savings bonus, paid separately, that only reach the headline figure if you open and fund both.
How a combo offer is structured
A typical structure pays one amount for a checking account meeting a direct deposit requirement, and a second amount for a savings account holding a minimum balance for a set period. The advertised number is the sum. Meet only the checking half and you get only the checking half.
The two halves usually have different conditions and different clocks: the checking side turns on deposits arriving within 60 or 90 days, while the savings side turns on a daily balance maintained for 90 days or more.
Where combos go wrong
- Opening the accounts on different days. Some offers require both to be opened within a short window, sometimes the same day.
- Funding the savings side from the checking side. If the savings bonus requires new money, moving funds internally can disqualify it.
- Letting the savings balance dip. Where the test is a daily balance, one day below the line can void that half.
- Assuming one enrolment covers both. Several banks require you to register for each promotion separately.
Work out the return on the locked-up money
The savings half usually demands the larger balance and the longer hold. That money is not free: if the promotional savings account pays a low rate, you are giving up the yield a competitive high-yield account would have paid over the same period.
Compare the savings bonus against that forgone interest before treating it as pure profit. Where the bonus is modest and the hold is long, the checking half alone can be the better deal.
Fees apply on both accounts
Two accounts means two potential monthly maintenance fees, each with its own waiver condition. The savings waiver is often the same balance the bonus requires, so the two move together — but the checking waiver may depend on a deposit level you stop meeting once the bonus period ends.
A sequence that works
- Confirm whether both accounts must be opened together, and on what date the clocks start.
- Identify a source of new money for the savings side that is not already at that bank.
- Set the savings deposit above the minimum, not at it, so a fee or pending debit cannot push it under.
- Diarise both end dates and the earliest safe closing date for each.
See the current roundup for offers that pay on both accounts, and best savings bonuses and HYSA rates to compare the yield you would give up.