You can cap how much leaves your account in any 24 hours. The cap is yours, it is separate from Bitaroo's own limits, and it applies to every withdrawal including automatic ones.
You will find it under Account > Security > Restrict withdrawals on the website, or Settings > Security > Restrict Withdrawals in Bitaroo Express.
One limit per asset
There are two, set independently:
- Bitcoin. This one figure covers on-chain and Lightning together, so a limit cannot be worked around by splitting a withdrawal across the two.
- Australian dollars.
Each starts as Unlimited. Setting one, or lowering one you already have, takes effect straight away. Raising a limit or removing it waits 48 hours, for the reasons set out in Restricting withdrawals from your account.
Every change is confirmed with a 2FA code.
How the 24 hours is measured
It is a rolling window, not a daily reset. At any moment Bitaroo adds up what has left your account in the previous 24 hours and checks whether this withdrawal would take you over.
A withdrawal counts from the moment it is accepted. It stops counting only if it fails or is cancelled, so a withdrawal that is queued, in progress, or waiting on a check still uses your headroom while it waits. This is why a withdrawal can be refused even though the earlier one has not arrived yet.
The amount counted is the amount you receive, not the amount plus the network fee. A limit of 0.5 BTC means 0.5 BTC in your hands.
Choosing a figure
A cap is most useful when it is set to what you actually move, rather than to what you own. If your ordinary withdrawal is a few hundred dollars, a limit set around that leaves your normal use untouched and makes a large unauthorised withdrawal impossible in a single day.
Remember which direction is slow. Lowering the figure is immediate, so you can always tighten it later. Raising it takes 48 hours, so a limit set too low is an inconvenience for two days.
A limit of zero is not accepted
A cap of zero would block the asset outright and, because lowering is immediate and raising waits, it would take 48 hours to undo. The app does not accept it. If you want to stop all withdrawals, use the approved IP address list instead, or contact support.
Scheduled and automatic withdrawals count too
If you have automatic bitcoin withdrawals set up, they are counted against your bitcoin limit the same as any other withdrawal. Setting a limit lower than your scheduled amount will stop that schedule from paying out, so check the two against each other.
Bitaroo's own limits still apply
Your cap sits alongside Bitaroo's limits rather than replacing them. Where both apply, the lower figure is the one that counts, so setting your own limit above Bitaroo's does not raise anything.