The "Business Funds are lower than card's remaining limit" warning appears when the company's spending power (funding balance in Float) in the card's currency is lower than the available limit on the card.
Although a given card's limit may be higher, the possible spending on pre-funded Float cards is limited by the company's available spending power; all transactions require the business to have a sufficient funding balance in order to be processed.
How can I resolve this?
If you are a Float Administrator:
You can top-up your organization's business balance from within Float at Settings > Banking > Funding, either on-demand via "Transfer Funds" or by configuring Auto-Funding to ensure a sufficient balance is always present.
We highly recommend configuring Auto-Funding so that both the transfer amount and the balance threshold are each sufficient to support at least five business days of typical spending and cardholders don't find themselves unable to use their Float cards.
Note that business funds are unique per currency; if you see this message on a CAD card you need to load CAD funds, and you need to load USD funds if you see this message on a USD card.
If you are a manager or a spender:
You can attempt to make the purchase if is less than your card's limit, recognizing that it may fail. If it is declined and you see the decline reason "Insufficient Business Funds" in Float, you will need to ask a Float administrator at your company to load funds into your business' account.
Note that Float Support is unable disclose your company's remaining funding balance to non-administrators, but a Float administrator at your company may tell you so you're aware of how much you can spend.