We've just rolled out a lovely new feature for capping leave types.

With this, you can set a limit on how many days or hours of a leave type your users can take in a year:

You can apply this to any type of leave, whether it affects allowances or not. 

And if you want to keep it flexible, just set the limit to "Unlimited" and a user can book as much of that leave as their allowance allows.

There's more info on this on our help site: Leave types