What is a timesheet?
A timesheet is a log of hours worked, broken down by date, client, and task. It's the evidence behind hourly invoices — and the habit that separates 'I think I worked about 30 hours' from a bill a client pays without argument. Log daily; memory lies by Friday.
In practice
A developer's timesheet shows 6.5 hours Tuesday on 'API integration — Client Acme.' The invoice lists the same line, and the client approves it without a single question.
Turn hours into invoices
Billia's invoice generator converts your timesheet rows into clean hourly line items.
Create an invoice — freeFrequently asked questions
How detailed should a timesheet be?
Date, client, task description, hours — that's the minimum. Enough detail that the client recognizes the work when they see the invoice.
Paper or app for timesheets?
Whichever you'll actually use daily. A notes app beats a sophisticated tool you open once a month.
Do I need timesheets for fixed-price work?
For billing, no — but track anyway. Knowing a $3,000 project took 45 hours tells you your real rate was $67/hour, which prices the next one.