If there is a maximum amount of funding available for this case, specify it here.
This could be due to limited funds available to the client, or this could be due to the funding source, e.g. a legal insurance provider.
For example, if you are working on a case that has a maximum payout of $5,000 from the legal insurance company, you would enter $5000 here.
Another example would be a limited scope engagement, where the client has decided to engage you for services up to $2,000.
This information is used to alert users that they are working on a case with restricted funding, and that their efforts must be constrained by the money available.