# Billing Plans
In Zipwire, senders record what they worked on and for how long in a private Journal which is more detailed than what is normally required on the final timesheet.
Configuring exactly what's allowed and disallowed on the timesheet is the job of the Billing Plan.
For example, in the United States, they like to use hours and in the United Kingdom, the *minimum* unit of time you can work is often half a day!
The billing plan editor grid showing half-day units.
A Billing Plan can allow up to 6 half-days per day. This can be confusing at first but you should consider that some people can easily work very long days or even "pull an all-nighter". Traditional timesheeting systems often can't handle the truth and force the worker to lie and spread the work over many days, or informally arrange to take time off in lieu.
Tiers can be used to incentivise overtime, or disincentivise over work and burn-out by having them paid less the long they work. Note that being paid much less than normal is often felt as a greater loss than not being paid at all!
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