Guides and free tools
Practical guides on invoicing, getting paid and hourly rates for freelancers and small teams who bill by the hour. The calculators and templates are free and need no account.
Clockaroo is time tracking and invoicing for agencies, studios, consultancies and freelancers.
Free tools
E-invoice creator
Create an XRechnung or ZUGFeRD invoice in your browser. Every file is checked before you download it.
XRechnung validator
Check an XRechnung or ZUGFeRD file with the official validators and read it as a normal invoice.
Getting paid
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Net 30 meaning and due date calculator
What net 30 means, the due date for any payment terms, and the legal limits in the US, UK and EU.
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Overdue invoice email templates
Four reminder emails to copy, from a polite nudge to a final notice, with subject lines and when to send each.
Rates and hours
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Billable hours explained
What counts as billable time, how to round it, and how tracked hours become invoice lines, with a worked example.
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Billable hours calculator
Add up your times, round them to 6, 15 or 30 minutes and see what to bill. With a minutes-to-decimal chart.
Calculator -
Freelance rate calculator
Work out the hourly and day rate you need from your income goal, costs, time off and billable share.
Calculator
Templates
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Timesheet templates
Weekly and monthly, for Excel, Google Sheets, Word and PDF. The hours and the billable total add up for you.
Template
For teams and professions
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Time tracking for consultants
Hours per client and project, rates per person, budgets, weekly approvals and invoices from tracked time.
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Time tracking for lawyers
Matters as projects, a note on every entry, rates per lawyer, weekly approvals and invoices.
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Time tracking for agencies
Project budgets, rates per person, weekly approvals, profit per client and invoices from tracked hours.
Comparisons and switching
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Harvest, Clockify, Toggl and Bonsai alternatives
How Clockaroo compares with four tools people often weigh it against, with the prices per person.
Comparison -
Toggl alternative
Toggl Track and Clockaroo compared on plans, prices, invoices and approvals, including what Toggl has that we don't.
Comparison -
Bonsai pricing in 2026
Bonsai's four plans per user, monthly or billed annually, what each includes and what a team pays.
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Harvest pricing in 2026
Harvest's seat prices since 2022, the 2026 usage charges, and a calculator for what your team pays.
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Harvest alternative
Harvest and Clockaroo side by side: seat prices, usage charges, e-invoices and the import from Harvest.
Comparison -
Clockify alternative
Clockify and Clockaroo compared on plans, prices, invoices and e-invoices, including what Clockify has that we don't.
Comparison -
Import from Harvest
Move people, clients, projects, rates, time and issued invoices from Harvest in one import.
Start with this week's hours
Time tracking and invoicing for agencies, studios, consultancies and freelancers. Track the hours, then turn the unbilled ones into an invoice your client can read.
For your team
Everyone's hours in one place, and every billable hour on an invoice.
No card. Invite your team when you're ready.
